./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/config/svcomp-MemCleanup-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-memcleanup) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f8d14145608efc0a8f321a178564faff63399ecbab28641c0c2971fec318068f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:35:50,342 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:35:50,344 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:35:50,376 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:35:50,377 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:35:50,378 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:35:50,380 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:35:50,382 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:35:50,384 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:35:50,385 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:35:50,386 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:35:50,388 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:35:50,388 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:35:50,390 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:35:50,391 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:35:50,393 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:35:50,394 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:35:50,395 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:35:50,397 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:35:50,400 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:35:50,402 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:35:50,407 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:35:50,409 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:35:50,409 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:35:50,413 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:35:50,413 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:35:50,414 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:35:50,415 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:35:50,415 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:35:50,417 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:35:50,417 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:35:50,418 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:35:50,419 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:35:50,420 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:35:50,421 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:35:50,421 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:35:50,422 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:35:50,422 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:35:50,423 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:35:50,424 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:35:50,424 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:35:50,425 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/config/svcomp-MemCleanup-32bit-Taipan_Default.epf [2021-11-20 23:35:50,453 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:35:50,453 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:35:50,454 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:35:50,454 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:35:50,455 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:35:50,455 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:35:50,456 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:35:50,456 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:35:50,456 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:35:50,457 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 23:35:50,457 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:35:50,457 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:35:50,457 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 23:35:50,458 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 23:35:50,458 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:35:50,458 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 23:35:50,458 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 23:35:50,458 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 23:35:50,459 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 23:35:50,459 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 23:35:50,459 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:35:50,460 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 23:35:50,460 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-20 23:35:50,460 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 23:35:50,460 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 23:35:50,460 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:35:50,461 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-20 23:35:50,461 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-20 23:35:50,461 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:35:50,461 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-20 23:35:50,461 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 23:35:50,461 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:35:50,462 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:35:50,462 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:35:50,462 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:35:50,462 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:35:50,463 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:35:50,463 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 23:35:50,463 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 23:35:50,463 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:35:50,463 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:35:50,463 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f8d14145608efc0a8f321a178564faff63399ecbab28641c0c2971fec318068f [2021-11-20 23:35:50,718 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:35:50,758 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:35:50,761 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:35:50,762 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:35:50,763 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:35:50,764 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i [2021-11-20 23:35:50,840 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/data/779ebf652/1dd7f41aee7f43009a9bbccafe32b86e/FLAGd50622f43 [2021-11-20 23:35:51,335 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:35:51,336 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i [2021-11-20 23:35:51,355 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/data/779ebf652/1dd7f41aee7f43009a9bbccafe32b86e/FLAGd50622f43 [2021-11-20 23:35:51,628 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/data/779ebf652/1dd7f41aee7f43009a9bbccafe32b86e [2021-11-20 23:35:51,630 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:35:51,631 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:35:51,635 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:35:51,635 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:35:51,639 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:35:51,640 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:35:51" (1/1) ... [2021-11-20 23:35:51,641 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d952a75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:51, skipping insertion in model container [2021-11-20 23:35:51,641 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:35:51" (1/1) ... [2021-11-20 23:35:51,649 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:35:51,724 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:35:52,000 WARN L230 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_ae1d0074-6c60-4715-8598-310b6d43c756/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i[22636,22649] [2021-11-20 23:35:52,027 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:35:52,034 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 23:35:52,065 WARN L230 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_ae1d0074-6c60-4715-8598-310b6d43c756/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i[22636,22649] [2021-11-20 23:35:52,079 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:35:52,109 INFO L208 MainTranslator]: Completed translation [2021-11-20 23:35:52,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:52 WrapperNode [2021-11-20 23:35:52,110 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:35:52,111 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 23:35:52,111 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 23:35:52,111 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 23:35:52,119 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:52" (1/1) ... [2021-11-20 23:35:52,134 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:52" (1/1) ... [2021-11-20 23:35:52,162 INFO L137 Inliner]: procedures = 129, calls = 79, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 203 [2021-11-20 23:35:52,163 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 23:35:52,163 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 23:35:52,164 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 23:35:52,164 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 23:35:52,172 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:52" (1/1) ... [2021-11-20 23:35:52,172 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:52" (1/1) ... [2021-11-20 23:35:52,177 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:52" (1/1) ... [2021-11-20 23:35:52,178 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:52" (1/1) ... [2021-11-20 23:35:52,188 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:52" (1/1) ... [2021-11-20 23:35:52,196 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:52" (1/1) ... [2021-11-20 23:35:52,199 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:52" (1/1) ... [2021-11-20 23:35:52,204 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 23:35:52,204 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 23:35:52,205 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 23:35:52,205 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 23:35:52,206 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:52" (1/1) ... [2021-11-20 23:35:52,224 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:35:52,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:35:52,252 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 23:35:52,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 23:35:52,286 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2021-11-20 23:35:52,286 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2021-11-20 23:35:52,287 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 23:35:52,287 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 23:35:52,287 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 23:35:52,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 23:35:52,287 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 23:35:52,287 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_prev [2021-11-20 23:35:52,287 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_prev [2021-11-20 23:35:52,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 23:35:52,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-20 23:35:52,287 INFO L130 BoogieDeclarations]: Found specification of procedure chain_node [2021-11-20 23:35:52,288 INFO L138 BoogieDeclarations]: Found implementation of procedure chain_node [2021-11-20 23:35:52,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 23:35:52,288 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_next [2021-11-20 23:35:52,288 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_next [2021-11-20 23:35:52,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 23:35:52,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 23:35:52,405 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 23:35:52,407 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 23:35:53,089 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 23:35:53,158 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 23:35:53,159 INFO L301 CfgBuilder]: Removed 33 assume(true) statements. [2021-11-20 23:35:53,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:35:53 BoogieIcfgContainer [2021-11-20 23:35:53,162 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 23:35:53,164 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 23:35:53,164 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 23:35:53,167 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 23:35:53,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:35:51" (1/3) ... [2021-11-20 23:35:53,168 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63706f25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:35:53, skipping insertion in model container [2021-11-20 23:35:53,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:52" (2/3) ... [2021-11-20 23:35:53,169 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63706f25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:35:53, skipping insertion in model container [2021-11-20 23:35:53,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:35:53" (3/3) ... [2021-11-20 23:35:53,170 INFO L111 eAbstractionObserver]: Analyzing ICFG sll_to_dll_rev-1.i [2021-11-20 23:35:53,175 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 23:35:53,176 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 83 error locations. [2021-11-20 23:35:53,222 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 23:35:53,229 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 [2021-11-20 23:35:53,229 INFO L340 AbstractCegarLoop]: Starting to check reachability of 83 error locations. [2021-11-20 23:35:53,249 INFO L276 IsEmpty]: Start isEmpty. Operand has 194 states, 91 states have (on average 2.340659340659341) internal successors, (213), 181 states have internal predecessors, (213), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-20 23:35:53,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-20 23:35:53,256 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:35:53,257 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-20 23:35:53,257 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-11-20 23:35:53,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:35:53,263 INFO L85 PathProgramCache]: Analyzing trace with hash 532615, now seen corresponding path program 1 times [2021-11-20 23:35:53,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:35:53,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999540140] [2021-11-20 23:35:53,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:35:53,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:35:53,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:35:53,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:35:53,411 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:35:53,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999540140] [2021-11-20 23:35:53,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999540140] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:35:53,413 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:35:53,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 23:35:53,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406877107] [2021-11-20 23:35:53,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:35:53,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 23:35:53,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:35:53,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 23:35:53,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 23:35:53,448 INFO L87 Difference]: Start difference. First operand has 194 states, 91 states have (on average 2.340659340659341) internal successors, (213), 181 states have internal predecessors, (213), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Second operand has 2 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:35:53,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:35:53,523 INFO L93 Difference]: Finished difference Result 193 states and 214 transitions. [2021-11-20 23:35:53,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 23:35:53,526 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-11-20 23:35:53,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:35:53,535 INFO L225 Difference]: With dead ends: 193 [2021-11-20 23:35:53,535 INFO L226 Difference]: Without dead ends: 192 [2021-11-20 23:35:53,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 23:35:53,541 INFO L933 BasicCegarLoop]: 184 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:35:53,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 184 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:35:53,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-11-20 23:35:53,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2021-11-20 23:35:53,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 89 states have (on average 2.101123595505618) internal successors, (187), 179 states have internal predecessors, (187), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-20 23:35:53,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 213 transitions. [2021-11-20 23:35:53,593 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 213 transitions. Word has length 3 [2021-11-20 23:35:53,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:35:53,593 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 213 transitions. [2021-11-20 23:35:53,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:35:53,594 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 213 transitions. [2021-11-20 23:35:53,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-20 23:35:53,594 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:35:53,594 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-20 23:35:53,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 23:35:53,595 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting chain_nodeErr0REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-11-20 23:35:53,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:35:53,596 INFO L85 PathProgramCache]: Analyzing trace with hash 16812538, now seen corresponding path program 1 times [2021-11-20 23:35:53,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:35:53,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174094426] [2021-11-20 23:35:53,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:35:53,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:35:53,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:35:53,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:35:53,650 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:35:53,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174094426] [2021-11-20 23:35:53,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174094426] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:35:53,651 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:35:53,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 23:35:53,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363279312] [2021-11-20 23:35:53,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:35:53,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:35:53,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:35:53,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:35:53,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:35:53,654 INFO L87 Difference]: Start difference. First operand 192 states and 213 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:35:53,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:35:53,869 INFO L93 Difference]: Finished difference Result 190 states and 211 transitions. [2021-11-20 23:35:53,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:35:53,870 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-11-20 23:35:53,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:35:53,872 INFO L225 Difference]: With dead ends: 190 [2021-11-20 23:35:53,872 INFO L226 Difference]: Without dead ends: 190 [2021-11-20 23:35:53,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:35:53,874 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 13 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:35:53,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 288 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:35:53,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-11-20 23:35:53,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2021-11-20 23:35:53,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 89 states have (on average 2.0786516853932584) internal successors, (185), 177 states have internal predecessors, (185), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-20 23:35:53,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 211 transitions. [2021-11-20 23:35:53,892 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 211 transitions. Word has length 4 [2021-11-20 23:35:53,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:35:53,893 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 211 transitions. [2021-11-20 23:35:53,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:35:53,893 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 211 transitions. [2021-11-20 23:35:53,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-20 23:35:53,893 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:35:53,894 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-20 23:35:53,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 23:35:53,894 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting chain_nodeErr1REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-11-20 23:35:53,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:35:53,895 INFO L85 PathProgramCache]: Analyzing trace with hash 16812539, now seen corresponding path program 1 times [2021-11-20 23:35:53,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:35:53,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313244689] [2021-11-20 23:35:53,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:35:53,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:35:53,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:35:53,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:35:53,950 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:35:53,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313244689] [2021-11-20 23:35:53,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313244689] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:35:53,950 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:35:53,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 23:35:53,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223686708] [2021-11-20 23:35:53,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:35:53,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:35:53,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:35:53,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:35:53,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:35:53,952 INFO L87 Difference]: Start difference. First operand 190 states and 211 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:35:54,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:35:54,106 INFO L93 Difference]: Finished difference Result 188 states and 209 transitions. [2021-11-20 23:35:54,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:35:54,107 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-11-20 23:35:54,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:35:54,108 INFO L225 Difference]: With dead ends: 188 [2021-11-20 23:35:54,109 INFO L226 Difference]: Without dead ends: 188 [2021-11-20 23:35:54,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:35:54,110 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 11 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:35:54,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 291 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:35:54,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-11-20 23:35:54,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2021-11-20 23:35:54,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 89 states have (on average 2.056179775280899) internal successors, (183), 175 states have internal predecessors, (183), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-20 23:35:54,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 209 transitions. [2021-11-20 23:35:54,126 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 209 transitions. Word has length 4 [2021-11-20 23:35:54,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:35:54,126 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 209 transitions. [2021-11-20 23:35:54,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:35:54,127 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 209 transitions. [2021-11-20 23:35:54,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-20 23:35:54,127 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:35:54,127 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-20 23:35:54,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 23:35:54,128 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting chain_nodeErr4REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-11-20 23:35:54,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:35:54,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1023004566, now seen corresponding path program 1 times [2021-11-20 23:35:54,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:35:54,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261478176] [2021-11-20 23:35:54,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:35:54,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:35:54,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:35:54,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:35:54,224 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:35:54,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261478176] [2021-11-20 23:35:54,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261478176] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:35:54,224 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:35:54,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:35:54,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495649956] [2021-11-20 23:35:54,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:35:54,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:35:54,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:35:54,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:35:54,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:35:54,227 INFO L87 Difference]: Start difference. First operand 188 states and 209 transitions. Second operand has 6 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:35:54,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:35:54,525 INFO L93 Difference]: Finished difference Result 183 states and 204 transitions. [2021-11-20 23:35:54,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:35:54,526 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-20 23:35:54,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:35:54,527 INFO L225 Difference]: With dead ends: 183 [2021-11-20 23:35:54,528 INFO L226 Difference]: Without dead ends: 183 [2021-11-20 23:35:54,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-20 23:35:54,529 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 38 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:35:54,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 578 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 23:35:54,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-11-20 23:35:54,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2021-11-20 23:35:54,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 89 states have (on average 2.0) internal successors, (178), 170 states have internal predecessors, (178), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-20 23:35:54,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 204 transitions. [2021-11-20 23:35:54,542 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 204 transitions. Word has length 6 [2021-11-20 23:35:54,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:35:54,542 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 204 transitions. [2021-11-20 23:35:54,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:35:54,543 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 204 transitions. [2021-11-20 23:35:54,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-20 23:35:54,543 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:35:54,543 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-20 23:35:54,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 23:35:54,544 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting chain_nodeErr5REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-11-20 23:35:54,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:35:54,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1023004565, now seen corresponding path program 1 times [2021-11-20 23:35:54,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:35:54,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105789458] [2021-11-20 23:35:54,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:35:54,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:35:54,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:35:54,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:35:54,694 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:35:54,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105789458] [2021-11-20 23:35:54,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105789458] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:35:54,694 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:35:54,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:35:54,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527966579] [2021-11-20 23:35:54,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:35:54,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:35:54,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:35:54,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:35:54,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:35:54,696 INFO L87 Difference]: Start difference. First operand 183 states and 204 transitions. Second operand has 5 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:35:55,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:35:55,019 INFO L93 Difference]: Finished difference Result 178 states and 199 transitions. [2021-11-20 23:35:55,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:35:55,020 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-20 23:35:55,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:35:55,021 INFO L225 Difference]: With dead ends: 178 [2021-11-20 23:35:55,021 INFO L226 Difference]: Without dead ends: 178 [2021-11-20 23:35:55,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:35:55,023 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 29 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:35:55,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 408 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 23:35:55,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-11-20 23:35:55,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2021-11-20 23:35:55,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 89 states have (on average 1.9438202247191012) internal successors, (173), 165 states have internal predecessors, (173), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-20 23:35:55,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 199 transitions. [2021-11-20 23:35:55,045 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 199 transitions. Word has length 6 [2021-11-20 23:35:55,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:35:55,045 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 199 transitions. [2021-11-20 23:35:55,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:35:55,046 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 199 transitions. [2021-11-20 23:35:55,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-20 23:35:55,046 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:35:55,046 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:35:55,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 23:35:55,047 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting chain_nodeErr6REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-11-20 23:35:55,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:35:55,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1648370340, now seen corresponding path program 1 times [2021-11-20 23:35:55,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:35:55,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410583604] [2021-11-20 23:35:55,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:35:55,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:35:55,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:35:55,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:35:55,123 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:35:55,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410583604] [2021-11-20 23:35:55,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410583604] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:35:55,123 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:35:55,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:35:55,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088605840] [2021-11-20 23:35:55,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:35:55,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:35:55,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:35:55,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:35:55,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:35:55,125 INFO L87 Difference]: Start difference. First operand 178 states and 199 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:35:55,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:35:55,265 INFO L93 Difference]: Finished difference Result 177 states and 198 transitions. [2021-11-20 23:35:55,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:35:55,266 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-20 23:35:55,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:35:55,267 INFO L225 Difference]: With dead ends: 177 [2021-11-20 23:35:55,268 INFO L226 Difference]: Without dead ends: 177 [2021-11-20 23:35:55,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:35:55,270 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 8 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:35:55,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 386 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:35:55,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-11-20 23:35:55,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2021-11-20 23:35:55,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 89 states have (on average 1.9325842696629214) internal successors, (172), 164 states have internal predecessors, (172), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-20 23:35:55,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 198 transitions. [2021-11-20 23:35:55,288 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 198 transitions. Word has length 7 [2021-11-20 23:35:55,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:35:55,289 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 198 transitions. [2021-11-20 23:35:55,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:35:55,289 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 198 transitions. [2021-11-20 23:35:55,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-20 23:35:55,290 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:35:55,290 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:35:55,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 23:35:55,291 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting chain_nodeErr7REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-11-20 23:35:55,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:35:55,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1648370339, now seen corresponding path program 1 times [2021-11-20 23:35:55,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:35:55,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400309471] [2021-11-20 23:35:55,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:35:55,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:35:55,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:35:55,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:35:55,358 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:35:55,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400309471] [2021-11-20 23:35:55,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400309471] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:35:55,358 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:35:55,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:35:55,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091377449] [2021-11-20 23:35:55,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:35:55,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:35:55,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:35:55,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:35:55,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:35:55,360 INFO L87 Difference]: Start difference. First operand 177 states and 198 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:35:55,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:35:55,509 INFO L93 Difference]: Finished difference Result 176 states and 197 transitions. [2021-11-20 23:35:55,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:35:55,510 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-20 23:35:55,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:35:55,511 INFO L225 Difference]: With dead ends: 176 [2021-11-20 23:35:55,512 INFO L226 Difference]: Without dead ends: 176 [2021-11-20 23:35:55,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:35:55,513 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 6 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:35:55,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 392 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:35:55,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-11-20 23:35:55,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2021-11-20 23:35:55,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 89 states have (on average 1.9213483146067416) internal successors, (171), 163 states have internal predecessors, (171), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-20 23:35:55,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 197 transitions. [2021-11-20 23:35:55,520 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 197 transitions. Word has length 7 [2021-11-20 23:35:55,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:35:55,520 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 197 transitions. [2021-11-20 23:35:55,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:35:55,521 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 197 transitions. [2021-11-20 23:35:55,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-20 23:35:55,522 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:35:55,522 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:35:55,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 23:35:55,522 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-11-20 23:35:55,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:35:55,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1889969027, now seen corresponding path program 1 times [2021-11-20 23:35:55,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:35:55,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667253415] [2021-11-20 23:35:55,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:35:55,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:35:55,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:35:55,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:35:55,719 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:35:55,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667253415] [2021-11-20 23:35:55,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667253415] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:35:55,719 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:35:55,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 23:35:55,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237874930] [2021-11-20 23:35:55,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:35:55,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 23:35:55,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:35:55,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 23:35:55,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-20 23:35:55,721 INFO L87 Difference]: Start difference. First operand 176 states and 197 transitions. Second operand has 10 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 23:35:56,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:35:56,296 INFO L93 Difference]: Finished difference Result 175 states and 196 transitions. [2021-11-20 23:35:56,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:35:56,297 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-11-20 23:35:56,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:35:56,299 INFO L225 Difference]: With dead ends: 175 [2021-11-20 23:35:56,299 INFO L226 Difference]: Without dead ends: 175 [2021-11-20 23:35:56,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-20 23:35:56,300 INFO L933 BasicCegarLoop]: 154 mSDtfsCounter, 68 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 759 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 23:35:56,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 504 Invalid, 782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 759 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 23:35:56,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-11-20 23:35:56,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2021-11-20 23:35:56,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 89 states have (on average 1.9101123595505618) internal successors, (170), 162 states have internal predecessors, (170), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-20 23:35:56,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 196 transitions. [2021-11-20 23:35:56,306 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 196 transitions. Word has length 13 [2021-11-20 23:35:56,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:35:56,308 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 196 transitions. [2021-11-20 23:35:56,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 23:35:56,308 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 196 transitions. [2021-11-20 23:35:56,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-20 23:35:56,309 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:35:56,309 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:35:56,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 23:35:56,310 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-11-20 23:35:56,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:35:56,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1889969028, now seen corresponding path program 1 times [2021-11-20 23:35:56,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:35:56,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008791044] [2021-11-20 23:35:56,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:35:56,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:35:56,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:35:56,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:35:56,513 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:35:56,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008791044] [2021-11-20 23:35:56,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008791044] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:35:56,514 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:35:56,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 23:35:56,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532102220] [2021-11-20 23:35:56,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:35:56,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 23:35:56,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:35:56,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 23:35:56,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:35:56,515 INFO L87 Difference]: Start difference. First operand 175 states and 196 transitions. Second operand has 8 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 23:35:57,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:35:57,023 INFO L93 Difference]: Finished difference Result 189 states and 216 transitions. [2021-11-20 23:35:57,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:35:57,024 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-11-20 23:35:57,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:35:57,027 INFO L225 Difference]: With dead ends: 189 [2021-11-20 23:35:57,027 INFO L226 Difference]: Without dead ends: 189 [2021-11-20 23:35:57,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:35:57,028 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 92 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 23:35:57,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 320 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 23:35:57,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-11-20 23:35:57,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 180. [2021-11-20 23:35:57,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 93 states have (on average 1.881720430107527) internal successors, (175), 166 states have internal predecessors, (175), 18 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-20 23:35:57,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 203 transitions. [2021-11-20 23:35:57,036 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 203 transitions. Word has length 13 [2021-11-20 23:35:57,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:35:57,037 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 203 transitions. [2021-11-20 23:35:57,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 23:35:57,037 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 203 transitions. [2021-11-20 23:35:57,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-20 23:35:57,038 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:35:57,038 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:35:57,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-20 23:35:57,039 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-11-20 23:35:57,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:35:57,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1074212787, now seen corresponding path program 1 times [2021-11-20 23:35:57,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:35:57,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672899760] [2021-11-20 23:35:57,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:35:57,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:35:57,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:35:57,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:35:57,226 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:35:57,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672899760] [2021-11-20 23:35:57,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672899760] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:35:57,226 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:35:57,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 23:35:57,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507383834] [2021-11-20 23:35:57,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:35:57,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 23:35:57,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:35:57,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 23:35:57,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-20 23:35:57,228 INFO L87 Difference]: Start difference. First operand 180 states and 203 transitions. Second operand has 10 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 23:35:58,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:35:58,005 INFO L93 Difference]: Finished difference Result 187 states and 213 transitions. [2021-11-20 23:35:58,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 23:35:58,006 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-11-20 23:35:58,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:35:58,007 INFO L225 Difference]: With dead ends: 187 [2021-11-20 23:35:58,007 INFO L226 Difference]: Without dead ends: 187 [2021-11-20 23:35:58,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-20 23:35:58,008 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 84 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 917 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 23:35:58,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 557 Invalid, 949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 917 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-20 23:35:58,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-11-20 23:35:58,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 184. [2021-11-20 23:35:58,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 97 states have (on average 1.865979381443299) internal successors, (181), 169 states have internal predecessors, (181), 18 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-20 23:35:58,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 209 transitions. [2021-11-20 23:35:58,016 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 209 transitions. Word has length 17 [2021-11-20 23:35:58,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:35:58,016 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 209 transitions. [2021-11-20 23:35:58,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 23:35:58,017 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 209 transitions. [2021-11-20 23:35:58,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-20 23:35:58,017 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:35:58,017 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:35:58,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-20 23:35:58,018 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-11-20 23:35:58,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:35:58,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1074212786, now seen corresponding path program 1 times [2021-11-20 23:35:58,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:35:58,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3541851] [2021-11-20 23:35:58,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:35:58,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:35:58,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:35:58,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:35:58,260 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:35:58,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3541851] [2021-11-20 23:35:58,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3541851] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:35:58,260 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:35:58,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 23:35:58,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490951280] [2021-11-20 23:35:58,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:35:58,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 23:35:58,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:35:58,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 23:35:58,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:35:58,262 INFO L87 Difference]: Start difference. First operand 184 states and 209 transitions. Second operand has 8 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 23:35:58,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:35:58,946 INFO L93 Difference]: Finished difference Result 191 states and 220 transitions. [2021-11-20 23:35:58,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:35:58,946 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-11-20 23:35:58,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:35:58,948 INFO L225 Difference]: With dead ends: 191 [2021-11-20 23:35:58,948 INFO L226 Difference]: Without dead ends: 191 [2021-11-20 23:35:58,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:35:58,949 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 45 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 798 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 23:35:58,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 473 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 798 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-20 23:35:58,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-11-20 23:35:58,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 188. [2021-11-20 23:35:58,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 101 states have (on average 1.8415841584158417) internal successors, (186), 173 states have internal predecessors, (186), 18 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-20 23:35:58,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 214 transitions. [2021-11-20 23:35:58,955 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 214 transitions. Word has length 17 [2021-11-20 23:35:58,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:35:58,956 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 214 transitions. [2021-11-20 23:35:58,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 23:35:58,956 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 214 transitions. [2021-11-20 23:35:58,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-20 23:35:58,957 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:35:58,957 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-11-20 23:35:58,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-20 23:35:58,958 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-11-20 23:35:58,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:35:58,958 INFO L85 PathProgramCache]: Analyzing trace with hash -157334143, now seen corresponding path program 1 times [2021-11-20 23:35:58,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:35:58,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492365755] [2021-11-20 23:35:58,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:35:58,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:35:59,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:35:59,375 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:35:59,375 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:35:59,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492365755] [2021-11-20 23:35:59,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492365755] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:35:59,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105945499] [2021-11-20 23:35:59,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:35:59,376 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:35:59,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:35:59,378 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:35:59,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 23:35:59,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:35:59,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-20 23:35:59,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:35:59,661 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-11-20 23:35:59,662 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 2 case distinctions, treesize of input 12 treesize of output 16 [2021-11-20 23:35:59,752 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 23:35:59,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 13 [2021-11-20 23:35:59,927 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-20 23:35:59,928 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 20 treesize of output 25 [2021-11-20 23:36:00,064 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-20 23:36:00,064 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 25 treesize of output 19 [2021-11-20 23:36:00,210 INFO L354 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2021-11-20 23:36:00,211 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 42 treesize of output 50 [2021-11-20 23:36:00,505 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 23:36:00,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:36:02,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105945499] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:36:02,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [207579580] [2021-11-20 23:36:02,680 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2021-11-20 23:36:02,681 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:36:02,685 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:36:02,690 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:36:02,690 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:36:02,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:02,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:02,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:02,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:02,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:02,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:02,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:02,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:02,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:02,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 32 [2021-11-20 23:36:02,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:02,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:02,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:03,121 INFO L354 Elim1Store]: treesize reduction 206, result has 11.2 percent of original size [2021-11-20 23:36:03,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 71 treesize of output 77 [2021-11-20 23:36:03,284 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 [2021-11-20 23:36:03,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-20 23:36:03,318 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 [2021-11-20 23:36:03,327 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 [2021-11-20 23:36:03,340 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 15 treesize of output 1 [2021-11-20 23:36:03,380 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 19 treesize of output 1 [2021-11-20 23:36:03,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:03,401 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 21 treesize of output 20 [2021-11-20 23:36:03,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:03,429 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 21 treesize of output 20 [2021-11-20 23:36:03,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:03,602 INFO L354 Elim1Store]: treesize reduction 38, result has 34.5 percent of original size [2021-11-20 23:36:03,602 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 32 treesize of output 42 [2021-11-20 23:36:03,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 23:36:03,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:03,692 INFO L354 Elim1Store]: treesize reduction 38, result has 34.5 percent of original size [2021-11-20 23:36:03,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 42 [2021-11-20 23:36:03,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 23:36:03,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:03,819 INFO L354 Elim1Store]: treesize reduction 66, result has 32.0 percent of original size [2021-11-20 23:36:03,819 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 48 treesize of output 56 [2021-11-20 23:36:03,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:03,937 INFO L354 Elim1Store]: treesize reduction 48, result has 50.5 percent of original size [2021-11-20 23:36:03,937 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 48 treesize of output 74 [2021-11-20 23:36:04,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:04,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:04,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:04,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:04,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:04,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:04,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:04,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:04,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:04,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-11-20 23:36:04,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-20 23:36:04,154 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 7 treesize of output 3 [2021-11-20 23:36:04,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:04,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:04,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:04,355 INFO L354 Elim1Store]: treesize reduction 206, result has 11.2 percent of original size [2021-11-20 23:36:04,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 71 treesize of output 77 [2021-11-20 23:36:04,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:04,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:04,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:04,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:04,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:04,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:04,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:04,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:04,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:04,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-11-20 23:36:04,591 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 7 treesize of output 3 [2021-11-20 23:36:04,642 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 7 treesize of output 3 [2021-11-20 23:36:05,254 INFO L354 Elim1Store]: treesize reduction 275, result has 12.1 percent of original size [2021-11-20 23:36:05,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 303 treesize of output 312 [2021-11-20 23:36:05,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:05,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:05,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:05,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:05,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:05,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:05,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-11-20 23:36:05,957 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:36:05,976 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:36:06,307 INFO L354 Elim1Store]: treesize reduction 275, result has 12.1 percent of original size [2021-11-20 23:36:06,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 303 treesize of output 312 [2021-11-20 23:36:06,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:06,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:06,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:06,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:06,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:06,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:06,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-11-20 23:36:07,119 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:36:07,126 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:36:07,797 INFO L354 Elim1Store]: treesize reduction 275, result has 12.1 percent of original size [2021-11-20 23:36:07,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 303 treesize of output 312 [2021-11-20 23:36:08,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:08,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:08,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:08,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:08,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:08,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:08,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-11-20 23:36:08,608 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:36:08,612 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:36:08,913 INFO L354 Elim1Store]: treesize reduction 275, result has 12.1 percent of original size [2021-11-20 23:36:08,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 303 treesize of output 312 [2021-11-20 23:36:09,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:09,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:09,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:09,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:09,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:09,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:09,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-11-20 23:36:09,938 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:36:09,941 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:36:10,838 INFO L354 Elim1Store]: treesize reduction 275, result has 12.1 percent of original size [2021-11-20 23:36:10,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 303 treesize of output 312 [2021-11-20 23:36:11,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:11,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:11,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:11,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:11,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:11,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:11,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-11-20 23:36:11,638 INFO L197 IcfgInterpreter]: Interpreting procedure chain_node with input of size 34 for LOIs [2021-11-20 23:36:12,446 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:36:20,143 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:36:20,143 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:36:20,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 16 [2021-11-20 23:36:20,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993669560] [2021-11-20 23:36:20,144 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 23:36:20,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 23:36:20,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:36:20,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 23:36:20,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=784, Unknown=1, NotChecked=0, Total=930 [2021-11-20 23:36:20,146 INFO L87 Difference]: Start difference. First operand 188 states and 214 transitions. Second operand has 18 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 15 states have internal predecessors, (32), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 23:36:21,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:36:21,032 INFO L93 Difference]: Finished difference Result 187 states and 213 transitions. [2021-11-20 23:36:21,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 23:36:21,034 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 15 states have internal predecessors, (32), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 23 [2021-11-20 23:36:21,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:36:21,035 INFO L225 Difference]: With dead ends: 187 [2021-11-20 23:36:21,035 INFO L226 Difference]: Without dead ends: 187 [2021-11-20 23:36:21,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=193, Invalid=996, Unknown=1, NotChecked=0, Total=1190 [2021-11-20 23:36:21,036 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 82 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 256 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 23:36:21,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 569 Invalid, 904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 610 Invalid, 0 Unknown, 256 Unchecked, 0.7s Time] [2021-11-20 23:36:21,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-11-20 23:36:21,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2021-11-20 23:36:21,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 101 states have (on average 1.8316831683168318) internal successors, (185), 172 states have internal predecessors, (185), 18 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-20 23:36:21,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 213 transitions. [2021-11-20 23:36:21,043 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 213 transitions. Word has length 23 [2021-11-20 23:36:21,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:36:21,043 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 213 transitions. [2021-11-20 23:36:21,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 15 states have internal predecessors, (32), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 23:36:21,043 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 213 transitions. [2021-11-20 23:36:21,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-20 23:36:21,049 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:36:21,049 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:36:21,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 23:36:21,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-20 23:36:21,263 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-11-20 23:36:21,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:36:21,264 INFO L85 PathProgramCache]: Analyzing trace with hash -908910070, now seen corresponding path program 1 times [2021-11-20 23:36:21,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:36:21,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390962391] [2021-11-20 23:36:21,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:36:21,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:36:21,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:36:21,468 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 23:36:21,468 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:36:21,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390962391] [2021-11-20 23:36:21,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390962391] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:36:21,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058494428] [2021-11-20 23:36:21,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:36:21,468 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:36:21,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:36:21,470 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:36:21,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 23:36:21,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:36:21,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-20 23:36:21,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:36:21,585 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-11-20 23:36:21,587 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 3 case distinctions, treesize of input 22 treesize of output 23 [2021-11-20 23:36:21,635 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-20 23:36:21,636 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 23 treesize of output 17 [2021-11-20 23:36:21,748 INFO L354 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2021-11-20 23:36:21,749 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 29 treesize of output 37 [2021-11-20 23:36:21,952 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-20 23:36:21,952 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 22 treesize of output 16 [2021-11-20 23:36:22,045 INFO L354 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2021-11-20 23:36:22,046 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 32 treesize of output 40 [2021-11-20 23:36:22,182 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 23:36:22,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:36:24,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058494428] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:36:24,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1085963999] [2021-11-20 23:36:24,286 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2021-11-20 23:36:24,287 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:36:24,287 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:36:24,287 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:36:24,287 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:36:24,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:24,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:24,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:24,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:24,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:24,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:24,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:24,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:24,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:24,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 32 [2021-11-20 23:36:24,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:24,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:24,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:24,631 INFO L354 Elim1Store]: treesize reduction 206, result has 11.2 percent of original size [2021-11-20 23:36:24,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 71 treesize of output 77 [2021-11-20 23:36:24,781 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 [2021-11-20 23:36:24,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-20 23:36:24,809 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 [2021-11-20 23:36:24,817 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 15 treesize of output 1 [2021-11-20 23:36:24,829 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 [2021-11-20 23:36:24,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:24,860 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 21 treesize of output 20 [2021-11-20 23:36:24,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:24,884 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 21 treesize of output 20 [2021-11-20 23:36:24,908 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 19 treesize of output 1 [2021-11-20 23:36:25,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 23:36:25,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:25,080 INFO L354 Elim1Store]: treesize reduction 38, result has 34.5 percent of original size [2021-11-20 23:36:25,080 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 32 treesize of output 42 [2021-11-20 23:36:25,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:25,138 INFO L354 Elim1Store]: treesize reduction 38, result has 34.5 percent of original size [2021-11-20 23:36:25,138 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 32 treesize of output 42 [2021-11-20 23:36:25,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 23:36:25,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:25,266 INFO L354 Elim1Store]: treesize reduction 48, result has 50.5 percent of original size [2021-11-20 23:36:25,266 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 48 treesize of output 74 [2021-11-20 23:36:25,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:25,370 INFO L354 Elim1Store]: treesize reduction 66, result has 32.0 percent of original size [2021-11-20 23:36:25,371 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 48 treesize of output 56 [2021-11-20 23:36:25,462 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 7 treesize of output 3 [2021-11-20 23:36:25,507 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 7 treesize of output 3 [2021-11-20 23:36:25,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:25,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:25,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:25,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:25,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:25,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:25,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:25,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:25,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:25,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-11-20 23:36:25,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:25,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:25,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:25,669 INFO L354 Elim1Store]: treesize reduction 206, result has 11.2 percent of original size [2021-11-20 23:36:25,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 71 treesize of output 77 [2021-11-20 23:36:25,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:25,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:25,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:25,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:25,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:25,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:25,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:25,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:25,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:25,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-11-20 23:36:25,828 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 7 treesize of output 3 [2021-11-20 23:36:25,852 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 7 treesize of output 3 [2021-11-20 23:36:26,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:26,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 15 [2021-11-20 23:36:26,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 23:36:26,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:26,441 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 15 treesize of output 15 [2021-11-20 23:36:26,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:26,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:26,842 INFO L354 Elim1Store]: treesize reduction 68, result has 16.0 percent of original size [2021-11-20 23:36:26,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 89 treesize of output 89 [2021-11-20 23:36:26,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:26,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-20 23:36:27,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:27,014 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 0 case distinctions, treesize of input 11 treesize of output 3 [2021-11-20 23:36:27,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:27,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 23:36:27,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:27,071 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 0 case distinctions, treesize of input 11 treesize of output 3 [2021-11-20 23:36:27,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:27,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:27,192 INFO L354 Elim1Store]: treesize reduction 68, result has 16.0 percent of original size [2021-11-20 23:36:27,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 89 treesize of output 89 [2021-11-20 23:36:27,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:27,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-20 23:36:27,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:27,340 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 0 case distinctions, treesize of input 11 treesize of output 3 [2021-11-20 23:36:27,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:27,401 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 0 case distinctions, treesize of input 11 treesize of output 3 [2021-11-20 23:36:27,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:27,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 23:36:27,843 INFO L354 Elim1Store]: treesize reduction 84, result has 13.4 percent of original size [2021-11-20 23:36:27,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 275 treesize of output 263 [2021-11-20 23:36:28,290 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:36:28,304 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:36:28,458 INFO L354 Elim1Store]: treesize reduction 84, result has 13.4 percent of original size [2021-11-20 23:36:28,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 275 treesize of output 263 [2021-11-20 23:36:28,823 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:36:28,825 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:36:29,386 INFO L354 Elim1Store]: treesize reduction 84, result has 13.4 percent of original size [2021-11-20 23:36:29,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 275 treesize of output 263 [2021-11-20 23:36:29,859 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:36:29,876 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:36:30,179 INFO L354 Elim1Store]: treesize reduction 84, result has 13.4 percent of original size [2021-11-20 23:36:30,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 275 treesize of output 263 [2021-11-20 23:36:30,877 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:36:30,884 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:36:31,557 INFO L354 Elim1Store]: treesize reduction 84, result has 13.4 percent of original size [2021-11-20 23:36:31,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 275 treesize of output 263 [2021-11-20 23:36:31,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:31,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:31,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:31,877 INFO L354 Elim1Store]: treesize reduction 206, result has 11.2 percent of original size [2021-11-20 23:36:31,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 71 treesize of output 77 [2021-11-20 23:36:31,996 INFO L197 IcfgInterpreter]: Interpreting procedure chain_node with input of size 90 for LOIs [2021-11-20 23:36:32,846 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:36:40,962 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:36:40,962 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:36:40,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 14 [2021-11-20 23:36:40,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178616568] [2021-11-20 23:36:40,962 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 23:36:40,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-20 23:36:40,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:36:40,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-20 23:36:40,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=893, Unknown=1, NotChecked=0, Total=1056 [2021-11-20 23:36:40,964 INFO L87 Difference]: Start difference. First operand 187 states and 213 transitions. Second operand has 16 states, 13 states have (on average 3.0) internal successors, (39), 14 states have internal predecessors, (39), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 23:36:41,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:36:41,428 INFO L93 Difference]: Finished difference Result 192 states and 222 transitions. [2021-11-20 23:36:41,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 23:36:41,429 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 3.0) internal successors, (39), 14 states have internal predecessors, (39), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 27 [2021-11-20 23:36:41,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:36:41,431 INFO L225 Difference]: With dead ends: 192 [2021-11-20 23:36:41,431 INFO L226 Difference]: Without dead ends: 192 [2021-11-20 23:36:41,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=176, Invalid=945, Unknown=1, NotChecked=0, Total=1122 [2021-11-20 23:36:41,433 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 149 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 23:36:41,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 400 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 473 Invalid, 0 Unknown, 72 Unchecked, 0.4s Time] [2021-11-20 23:36:41,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-11-20 23:36:41,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 182. [2021-11-20 23:36:41,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 97 states have (on average 1.8350515463917525) internal successors, (178), 168 states have internal predecessors, (178), 18 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-20 23:36:41,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 206 transitions. [2021-11-20 23:36:41,440 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 206 transitions. Word has length 27 [2021-11-20 23:36:41,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:36:41,440 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 206 transitions. [2021-11-20 23:36:41,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 3.0) internal successors, (39), 14 states have internal predecessors, (39), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 23:36:41,441 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 206 transitions. [2021-11-20 23:36:41,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-20 23:36:41,441 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:36:41,441 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:36:41,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 23:36:41,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:36:41,655 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-11-20 23:36:41,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:36:41,656 INFO L85 PathProgramCache]: Analyzing trace with hash -908910069, now seen corresponding path program 1 times [2021-11-20 23:36:41,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:36:41,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790534618] [2021-11-20 23:36:41,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:36:41,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:36:41,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:36:42,104 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 23:36:42,104 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:36:42,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790534618] [2021-11-20 23:36:42,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790534618] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:36:42,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807444814] [2021-11-20 23:36:42,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:36:42,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:36:42,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:36:42,105 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:36:42,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 23:36:42,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:36:42,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-20 23:36:42,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:36:42,222 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-11-20 23:36:42,223 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 2 case distinctions, treesize of input 12 treesize of output 16 [2021-11-20 23:36:42,278 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 23:36:42,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 13 [2021-11-20 23:36:42,404 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-20 23:36:42,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2021-11-20 23:36:42,573 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 23:36:42,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 13 [2021-11-20 23:36:42,664 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-20 23:36:42,665 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 27 treesize of output 32 [2021-11-20 23:36:42,761 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 23:36:42,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:36:44,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807444814] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:36:44,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2045867596] [2021-11-20 23:36:44,898 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2021-11-20 23:36:44,898 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:36:44,898 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:36:44,898 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:36:44,899 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:36:44,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:44,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:44,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:44,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:44,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:44,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:44,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:44,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:44,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:44,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 32 [2021-11-20 23:36:45,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:45,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:45,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:45,148 INFO L354 Elim1Store]: treesize reduction 206, result has 11.2 percent of original size [2021-11-20 23:36:45,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 71 treesize of output 77 [2021-11-20 23:36:45,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-11-20 23:36:45,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-20 23:36:45,273 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 [2021-11-20 23:36:45,281 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 15 treesize of output 1 [2021-11-20 23:36:45,286 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 [2021-11-20 23:36:45,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:45,316 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 21 treesize of output 20 [2021-11-20 23:36:45,326 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 19 treesize of output 1 [2021-11-20 23:36:45,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:45,339 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 21 treesize of output 20 [2021-11-20 23:36:45,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 23:36:45,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:45,476 INFO L354 Elim1Store]: treesize reduction 38, result has 34.5 percent of original size [2021-11-20 23:36:45,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 42 [2021-11-20 23:36:45,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:45,523 INFO L354 Elim1Store]: treesize reduction 38, result has 34.5 percent of original size [2021-11-20 23:36:45,523 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 32 treesize of output 42 [2021-11-20 23:36:45,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 23:36:45,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:45,620 INFO L354 Elim1Store]: treesize reduction 66, result has 32.0 percent of original size [2021-11-20 23:36:45,620 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 48 treesize of output 56 [2021-11-20 23:36:45,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:45,691 INFO L354 Elim1Store]: treesize reduction 48, result has 50.5 percent of original size [2021-11-20 23:36:45,691 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 48 treesize of output 74 [2021-11-20 23:36:45,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:45,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:45,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:45,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:45,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:45,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:45,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:45,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:45,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:45,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-11-20 23:36:45,798 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 7 treesize of output 3 [2021-11-20 23:36:45,810 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 7 treesize of output 3 [2021-11-20 23:36:45,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:45,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:45,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:45,941 INFO L354 Elim1Store]: treesize reduction 206, result has 11.2 percent of original size [2021-11-20 23:36:45,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 71 treesize of output 77 [2021-11-20 23:36:46,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:46,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:46,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:46,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:46,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:46,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:46,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:46,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:46,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:46,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-11-20 23:36:46,145 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 7 treesize of output 3 [2021-11-20 23:36:46,156 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 7 treesize of output 3 [2021-11-20 23:36:46,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:46,539 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 15 treesize of output 15 [2021-11-20 23:36:46,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:46,574 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 15 treesize of output 15 [2021-11-20 23:36:46,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 23:36:47,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:47,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:47,029 INFO L354 Elim1Store]: treesize reduction 68, result has 16.0 percent of original size [2021-11-20 23:36:47,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 89 treesize of output 89 [2021-11-20 23:36:47,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:47,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 23:36:47,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:47,164 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 0 case distinctions, treesize of input 11 treesize of output 3 [2021-11-20 23:36:47,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:47,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-20 23:36:47,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:47,206 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 0 case distinctions, treesize of input 11 treesize of output 3 [2021-11-20 23:36:47,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:47,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:47,318 INFO L354 Elim1Store]: treesize reduction 68, result has 16.0 percent of original size [2021-11-20 23:36:47,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 89 treesize of output 89 [2021-11-20 23:36:47,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:47,429 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 0 case distinctions, treesize of input 11 treesize of output 3 [2021-11-20 23:36:47,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:47,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 23:36:47,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:47,461 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 0 case distinctions, treesize of input 11 treesize of output 3 [2021-11-20 23:36:47,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:47,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-20 23:36:47,877 INFO L354 Elim1Store]: treesize reduction 84, result has 13.4 percent of original size [2021-11-20 23:36:47,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 275 treesize of output 263 [2021-11-20 23:36:48,401 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:36:48,409 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:36:48,672 INFO L354 Elim1Store]: treesize reduction 84, result has 13.4 percent of original size [2021-11-20 23:36:48,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 275 treesize of output 263 [2021-11-20 23:36:48,937 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:36:48,948 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:36:49,501 INFO L354 Elim1Store]: treesize reduction 84, result has 13.4 percent of original size [2021-11-20 23:36:49,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 275 treesize of output 263 [2021-11-20 23:36:49,839 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:36:49,851 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:36:50,128 INFO L354 Elim1Store]: treesize reduction 84, result has 13.4 percent of original size [2021-11-20 23:36:50,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 275 treesize of output 263 [2021-11-20 23:36:50,556 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:36:50,573 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:36:50,586 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:36:51,333 INFO L354 Elim1Store]: treesize reduction 84, result has 13.4 percent of original size [2021-11-20 23:36:51,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 275 treesize of output 263 [2021-11-20 23:36:52,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:52,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:52,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:52,197 INFO L354 Elim1Store]: treesize reduction 206, result has 11.2 percent of original size [2021-11-20 23:36:52,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 71 treesize of output 77 [2021-11-20 23:36:52,302 INFO L197 IcfgInterpreter]: Interpreting procedure chain_node with input of size 90 for LOIs [2021-11-20 23:36:53,111 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:37:01,957 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:37:01,957 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:37:01,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 15 [2021-11-20 23:37:01,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877838354] [2021-11-20 23:37:01,957 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 23:37:01,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-20 23:37:01,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:37:01,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-20 23:37:01,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=964, Unknown=1, NotChecked=0, Total=1122 [2021-11-20 23:37:01,960 INFO L87 Difference]: Start difference. First operand 182 states and 206 transitions. Second operand has 17 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 14 states have internal predecessors, (41), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-20 23:37:02,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:37:02,745 INFO L93 Difference]: Finished difference Result 201 states and 230 transitions. [2021-11-20 23:37:02,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 23:37:02,745 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 14 states have internal predecessors, (41), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 27 [2021-11-20 23:37:02,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:37:02,747 INFO L225 Difference]: With dead ends: 201 [2021-11-20 23:37:02,747 INFO L226 Difference]: Without dead ends: 201 [2021-11-20 23:37:02,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=200, Invalid=1131, Unknown=1, NotChecked=0, Total=1332 [2021-11-20 23:37:02,748 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 101 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 643 SdHoareTripleChecker+Invalid, 1171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 403 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 23:37:02,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 643 Invalid, 1171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 728 Invalid, 0 Unknown, 403 Unchecked, 0.6s Time] [2021-11-20 23:37:02,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-11-20 23:37:02,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 196. [2021-11-20 23:37:02,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 107 states have (on average 1.7757009345794392) internal successors, (190), 179 states have internal predecessors, (190), 21 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-20 23:37:02,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 224 transitions. [2021-11-20 23:37:02,757 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 224 transitions. Word has length 27 [2021-11-20 23:37:02,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:37:02,757 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 224 transitions. [2021-11-20 23:37:02,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 14 states have internal predecessors, (41), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-20 23:37:02,758 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 224 transitions. [2021-11-20 23:37:02,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-20 23:37:02,759 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:37:02,759 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:37:02,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 23:37:02,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-20 23:37:02,973 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-11-20 23:37:02,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:37:02,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1672508004, now seen corresponding path program 1 times [2021-11-20 23:37:02,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:37:02,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596779445] [2021-11-20 23:37:02,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:37:02,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:37:02,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:37:03,089 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:37:03,089 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:37:03,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596779445] [2021-11-20 23:37:03,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596779445] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:37:03,090 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:37:03,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 23:37:03,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197908721] [2021-11-20 23:37:03,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:37:03,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 23:37:03,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:37:03,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 23:37:03,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:37:03,091 INFO L87 Difference]: Start difference. First operand 196 states and 224 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 23:37:03,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:37:03,476 INFO L93 Difference]: Finished difference Result 199 states and 228 transitions. [2021-11-20 23:37:03,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:37:03,477 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2021-11-20 23:37:03,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:37:03,478 INFO L225 Difference]: With dead ends: 199 [2021-11-20 23:37:03,478 INFO L226 Difference]: Without dead ends: 199 [2021-11-20 23:37:03,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-20 23:37:03,479 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 198 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 23:37:03,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 255 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 23:37:03,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-11-20 23:37:03,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 189. [2021-11-20 23:37:03,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 107 states have (on average 1.7102803738317758) internal successors, (183), 172 states have internal predecessors, (183), 21 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-20 23:37:03,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 217 transitions. [2021-11-20 23:37:03,487 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 217 transitions. Word has length 30 [2021-11-20 23:37:03,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:37:03,488 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 217 transitions. [2021-11-20 23:37:03,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 23:37:03,488 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 217 transitions. [2021-11-20 23:37:03,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-20 23:37:03,489 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:37:03,489 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:37:03,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-20 23:37:03,490 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-11-20 23:37:03,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:37:03,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1672508005, now seen corresponding path program 1 times [2021-11-20 23:37:03,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:37:03,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626845532] [2021-11-20 23:37:03,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:37:03,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:37:03,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:37:03,628 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:37:03,628 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:37:03,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626845532] [2021-11-20 23:37:03,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626845532] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:37:03,628 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:37:03,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 23:37:03,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858169925] [2021-11-20 23:37:03,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:37:03,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 23:37:03,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:37:03,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 23:37:03,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:37:03,631 INFO L87 Difference]: Start difference. First operand 189 states and 217 transitions. Second operand has 8 states, 6 states have (on average 4.333333333333333) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 23:37:04,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:37:04,018 INFO L93 Difference]: Finished difference Result 203 states and 236 transitions. [2021-11-20 23:37:04,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 23:37:04,019 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 4.333333333333333) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2021-11-20 23:37:04,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:37:04,020 INFO L225 Difference]: With dead ends: 203 [2021-11-20 23:37:04,021 INFO L226 Difference]: Without dead ends: 203 [2021-11-20 23:37:04,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-20 23:37:04,022 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 401 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:37:04,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [403 Valid, 153 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 23:37:04,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-11-20 23:37:04,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 189. [2021-11-20 23:37:04,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 112 states have (on average 1.6339285714285714) internal successors, (183), 171 states have internal predecessors, (183), 22 states have call successors, (22), 5 states have call predecessors, (22), 4 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-20 23:37:04,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 219 transitions. [2021-11-20 23:37:04,030 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 219 transitions. Word has length 30 [2021-11-20 23:37:04,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:37:04,030 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 219 transitions. [2021-11-20 23:37:04,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 4.333333333333333) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 23:37:04,031 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 219 transitions. [2021-11-20 23:37:04,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-20 23:37:04,032 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:37:04,032 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:37:04,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-20 23:37:04,039 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-11-20 23:37:04,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:37:04,040 INFO L85 PathProgramCache]: Analyzing trace with hash 308140793, now seen corresponding path program 1 times [2021-11-20 23:37:04,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:37:04,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471384480] [2021-11-20 23:37:04,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:37:04,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:37:04,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:37:04,155 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:37:04,155 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:37:04,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471384480] [2021-11-20 23:37:04,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471384480] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:37:04,156 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:37:04,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 23:37:04,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292712643] [2021-11-20 23:37:04,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:37:04,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 23:37:04,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:37:04,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 23:37:04,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:37:04,158 INFO L87 Difference]: Start difference. First operand 189 states and 219 transitions. Second operand has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 23:37:04,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:37:04,587 INFO L93 Difference]: Finished difference Result 192 states and 223 transitions. [2021-11-20 23:37:04,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:37:04,588 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 31 [2021-11-20 23:37:04,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:37:04,589 INFO L225 Difference]: With dead ends: 192 [2021-11-20 23:37:04,589 INFO L226 Difference]: Without dead ends: 192 [2021-11-20 23:37:04,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-20 23:37:04,590 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 158 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 23:37:04,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 325 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 23:37:04,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-11-20 23:37:04,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 182. [2021-11-20 23:37:04,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 112 states have (on average 1.5714285714285714) internal successors, (176), 164 states have internal predecessors, (176), 22 states have call successors, (22), 5 states have call predecessors, (22), 4 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-20 23:37:04,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 212 transitions. [2021-11-20 23:37:04,598 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 212 transitions. Word has length 31 [2021-11-20 23:37:04,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:37:04,599 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 212 transitions. [2021-11-20 23:37:04,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 23:37:04,599 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 212 transitions. [2021-11-20 23:37:04,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-20 23:37:04,600 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:37:04,600 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:37:04,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-20 23:37:04,601 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-11-20 23:37:04,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:37:04,601 INFO L85 PathProgramCache]: Analyzing trace with hash 308140794, now seen corresponding path program 1 times [2021-11-20 23:37:04,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:37:04,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397946783] [2021-11-20 23:37:04,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:37:04,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:37:04,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:37:04,738 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:37:04,738 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:37:04,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397946783] [2021-11-20 23:37:04,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397946783] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:37:04,739 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:37:04,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 23:37:04,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950216466] [2021-11-20 23:37:04,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:37:04,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 23:37:04,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:37:04,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 23:37:04,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:37:04,740 INFO L87 Difference]: Start difference. First operand 182 states and 212 transitions. Second operand has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 23:37:05,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:37:05,151 INFO L93 Difference]: Finished difference Result 206 states and 246 transitions. [2021-11-20 23:37:05,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 23:37:05,152 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 31 [2021-11-20 23:37:05,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:37:05,156 INFO L225 Difference]: With dead ends: 206 [2021-11-20 23:37:05,156 INFO L226 Difference]: Without dead ends: 206 [2021-11-20 23:37:05,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-20 23:37:05,158 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 301 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 23:37:05,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 155 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 23:37:05,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-11-20 23:37:05,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 187. [2021-11-20 23:37:05,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 122 states have (on average 1.4918032786885247) internal successors, (182), 167 states have internal predecessors, (182), 23 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-20 23:37:05,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 220 transitions. [2021-11-20 23:37:05,167 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 220 transitions. Word has length 31 [2021-11-20 23:37:05,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:37:05,167 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 220 transitions. [2021-11-20 23:37:05,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 23:37:05,167 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 220 transitions. [2021-11-20 23:37:05,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-20 23:37:05,168 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:37:05,168 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:37:05,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-20 23:37:05,169 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-11-20 23:37:05,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:37:05,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1565693152, now seen corresponding path program 1 times [2021-11-20 23:37:05,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:37:05,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052468383] [2021-11-20 23:37:05,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:37:05,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:37:05,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:37:05,906 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:37:05,906 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:37:05,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052468383] [2021-11-20 23:37:05,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052468383] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:37:05,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614740555] [2021-11-20 23:37:05,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:37:05,907 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:37:05,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:37:05,909 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:37:05,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 23:37:06,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:37:06,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 75 conjunts are in the unsatisfiable core [2021-11-20 23:37:06,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:37:06,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 23:37:06,456 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-20 23:37:06,457 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 24 treesize of output 19 [2021-11-20 23:37:06,739 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-20 23:37:06,739 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 35 treesize of output 29 [2021-11-20 23:37:06,844 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-20 23:37:06,844 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 39 treesize of output 19 [2021-11-20 23:37:18,197 INFO L354 Elim1Store]: treesize reduction 384, result has 17.1 percent of original size [2021-11-20 23:37:18,197 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 8 case distinctions, treesize of input 89 treesize of output 111 [2021-11-20 23:37:18,209 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-20 23:37:18,209 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 119 treesize of output 119 [2021-11-20 23:37:20,830 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 63 treesize of output 62 [2021-11-20 23:37:21,062 INFO L354 Elim1Store]: treesize reduction 67, result has 13.0 percent of original size [2021-11-20 23:37:21,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 51 [2021-11-20 23:37:21,069 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 23:37:21,069 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 51 treesize of output 51 [2021-11-20 23:37:21,093 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:37:21,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:37:21,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 23:37:21,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614740555] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:37:21,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1504108723] [2021-11-20 23:37:21,462 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2021-11-20 23:37:21,462 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:37:21,462 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:37:21,462 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:37:21,463 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:37:21,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:21,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:21,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:21,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:21,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:21,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:21,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:21,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:21,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:21,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 11 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 32 [2021-11-20 23:37:21,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:21,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:21,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:21,776 INFO L354 Elim1Store]: treesize reduction 206, result has 11.2 percent of original size [2021-11-20 23:37:21,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 71 treesize of output 77 [2021-11-20 23:37:21,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-20 23:37:21,879 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 [2021-11-20 23:37:21,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 23:37:21,905 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 [2021-11-20 23:37:21,914 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 [2021-11-20 23:37:21,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:21,943 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 21 treesize of output 20 [2021-11-20 23:37:21,953 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 19 treesize of output 1 [2021-11-20 23:37:21,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:21,967 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 21 treesize of output 20 [2021-11-20 23:37:22,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:22,085 INFO L354 Elim1Store]: treesize reduction 38, result has 34.5 percent of original size [2021-11-20 23:37:22,085 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 32 treesize of output 42 [2021-11-20 23:37:22,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 23:37:22,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:22,145 INFO L354 Elim1Store]: treesize reduction 38, result has 34.5 percent of original size [2021-11-20 23:37:22,146 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 32 treesize of output 42 [2021-11-20 23:37:22,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 23:37:22,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:22,260 INFO L354 Elim1Store]: treesize reduction 66, result has 32.0 percent of original size [2021-11-20 23:37:22,261 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 48 treesize of output 56 [2021-11-20 23:37:22,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:22,358 INFO L354 Elim1Store]: treesize reduction 48, result has 50.5 percent of original size [2021-11-20 23:37:22,358 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 48 treesize of output 74 [2021-11-20 23:37:22,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:22,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:22,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:22,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:22,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:22,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:22,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:22,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:22,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:22,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-11-20 23:37:22,552 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 7 treesize of output 3 [2021-11-20 23:37:22,562 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 7 treesize of output 3 [2021-11-20 23:37:22,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:22,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:22,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:22,725 INFO L354 Elim1Store]: treesize reduction 206, result has 11.2 percent of original size [2021-11-20 23:37:22,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 71 treesize of output 77 [2021-11-20 23:37:22,860 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 7 treesize of output 3 [2021-11-20 23:37:22,909 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 7 treesize of output 3 [2021-11-20 23:37:22,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:22,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:22,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:22,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:22,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:22,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:22,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:22,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:22,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:22,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-11-20 23:37:23,587 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 15 treesize of output 1 [2021-11-20 23:37:23,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:23,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:23,671 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:37:23,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 93 treesize of output 91 [2021-11-20 23:37:23,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:23,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:23,705 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:37:23,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 66 [2021-11-20 23:37:24,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 23:37:24,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:24,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:24,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:24,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:24,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:24,408 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:37:24,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 111 treesize of output 91 [2021-11-20 23:37:24,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:24,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:24,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:24,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:24,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:24,431 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:37:24,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 107 treesize of output 108 [2021-11-20 23:37:24,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:24,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:24,670 INFO L354 Elim1Store]: treesize reduction 68, result has 16.0 percent of original size [2021-11-20 23:37:24,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 180 treesize of output 180 [2021-11-20 23:37:25,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:25,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:25,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:25,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:25,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:25,087 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:37:25,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 139 treesize of output 98 [2021-11-20 23:37:25,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:25,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:25,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:25,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:25,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:25,103 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:37:25,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 86 treesize of output 66 [2021-11-20 23:37:25,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:25,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:25,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:25,118 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-20 23:37:25,118 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 54 treesize of output 46 [2021-11-20 23:37:25,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:25,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:25,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:25,132 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-20 23:37:25,132 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 28 treesize of output 20 [2021-11-20 23:37:25,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:25,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:25,329 INFO L354 Elim1Store]: treesize reduction 68, result has 16.0 percent of original size [2021-11-20 23:37:25,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 180 treesize of output 180 [2021-11-20 23:37:25,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:25,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:25,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:25,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:25,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:25,732 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:37:25,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 139 treesize of output 115 [2021-11-20 23:37:25,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:25,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:25,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:25,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:25,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:25,755 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:37:25,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 103 treesize of output 66 [2021-11-20 23:37:25,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:25,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:25,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:25,775 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-20 23:37:25,776 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 54 treesize of output 46 [2021-11-20 23:37:25,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:25,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:25,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:25,797 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-20 23:37:25,797 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 28 treesize of output 20 [2021-11-20 23:37:26,346 INFO L354 Elim1Store]: treesize reduction 39, result has 18.8 percent of original size [2021-11-20 23:37:26,347 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 107 treesize of output 107 [2021-11-20 23:37:27,095 INFO L354 Elim1Store]: treesize reduction 84, result has 13.4 percent of original size [2021-11-20 23:37:27,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 180 treesize of output 180 [2021-11-20 23:37:27,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:27,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:27,388 INFO L354 Elim1Store]: treesize reduction 68, result has 16.0 percent of original size [2021-11-20 23:37:27,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 180 treesize of output 180 [2021-11-20 23:37:27,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:27,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:27,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:27,746 INFO L354 Elim1Store]: treesize reduction 206, result has 11.2 percent of original size [2021-11-20 23:37:27,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 71 treesize of output 77 [2021-11-20 23:37:27,846 INFO L197 IcfgInterpreter]: Interpreting procedure chain_node with input of size 150 for LOIs [2021-11-20 23:37:34,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 23:37:34,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:37:34,292 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Some non-self update cases but no top-level DER relation at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.DerPreprocessor.(DerPreprocessor.java:146) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:340) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne(DualJunctionSaa.java:115) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryExhaustivelyToEliminate(DualJunctionSaa.java:93) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:903) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:865) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:783) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:425) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:355) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:162) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:243) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:233) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:92) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:278) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:264) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-20 23:37:34,297 INFO L158 Benchmark]: Toolchain (without parser) took 102665.75ms. Allocated memory was 102.8MB in the beginning and 218.1MB in the end (delta: 115.3MB). Free memory was 60.8MB in the beginning and 132.4MB in the end (delta: -71.6MB). Peak memory consumption was 43.7MB. Max. memory is 16.1GB. [2021-11-20 23:37:34,297 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 102.8MB. Free memory was 78.3MB in the beginning and 78.3MB in the end (delta: 45.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 23:37:34,298 INFO L158 Benchmark]: CACSL2BoogieTranslator took 475.42ms. Allocated memory is still 102.8MB. Free memory was 60.6MB in the beginning and 70.8MB in the end (delta: -10.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-20 23:37:34,298 INFO L158 Benchmark]: Boogie Procedure Inliner took 52.10ms. Allocated memory is still 102.8MB. Free memory was 70.8MB in the beginning and 68.3MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 23:37:34,298 INFO L158 Benchmark]: Boogie Preprocessor took 40.40ms. Allocated memory is still 102.8MB. Free memory was 68.3MB in the beginning and 65.9MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 23:37:34,299 INFO L158 Benchmark]: RCFGBuilder took 957.39ms. Allocated memory was 102.8MB in the beginning and 123.7MB in the end (delta: 21.0MB). Free memory was 65.9MB in the beginning and 91.6MB in the end (delta: -25.7MB). Peak memory consumption was 33.2MB. Max. memory is 16.1GB. [2021-11-20 23:37:34,299 INFO L158 Benchmark]: TraceAbstraction took 101133.14ms. Allocated memory was 123.7MB in the beginning and 218.1MB in the end (delta: 94.4MB). Free memory was 91.6MB in the beginning and 132.4MB in the end (delta: -40.8MB). Peak memory consumption was 54.2MB. Max. memory is 16.1GB. [2021-11-20 23:37:34,300 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 102.8MB. Free memory was 78.3MB in the beginning and 78.3MB in the end (delta: 45.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 475.42ms. Allocated memory is still 102.8MB. Free memory was 60.6MB in the beginning and 70.8MB in the end (delta: -10.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 52.10ms. Allocated memory is still 102.8MB. Free memory was 70.8MB in the beginning and 68.3MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 40.40ms. Allocated memory is still 102.8MB. Free memory was 68.3MB in the beginning and 65.9MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 957.39ms. Allocated memory was 102.8MB in the beginning and 123.7MB in the end (delta: 21.0MB). Free memory was 65.9MB in the beginning and 91.6MB in the end (delta: -25.7MB). Peak memory consumption was 33.2MB. Max. memory is 16.1GB. * TraceAbstraction took 101133.14ms. Allocated memory was 123.7MB in the beginning and 218.1MB in the end (delta: 94.4MB). Free memory was 91.6MB in the beginning and 132.4MB in the end (delta: -40.8MB). Peak memory consumption was 54.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Some non-self update cases but no top-level DER relation de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Some non-self update cases but no top-level DER relation: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.DerPreprocessor.(DerPreprocessor.java:146) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-20 23:37:34,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/config/svcomp-MemCleanup-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-memcleanup) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f8d14145608efc0a8f321a178564faff63399ecbab28641c0c2971fec318068f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:37:36,707 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:37:36,709 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:37:36,739 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:37:36,740 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:37:36,741 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:37:36,743 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:37:36,746 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:37:36,748 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:37:36,749 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:37:36,750 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:37:36,752 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:37:36,753 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:37:36,754 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:37:36,756 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:37:36,757 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:37:36,758 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:37:36,759 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:37:36,762 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:37:36,767 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:37:36,771 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:37:36,773 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:37:36,775 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:37:36,778 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:37:36,784 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:37:36,785 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:37:36,785 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:37:36,789 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:37:36,794 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:37:36,795 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:37:36,796 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:37:36,798 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:37:36,799 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:37:36,800 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:37:36,802 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:37:36,803 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:37:36,804 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:37:36,804 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:37:36,804 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:37:36,806 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:37:36,807 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:37:36,812 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/config/svcomp-MemCleanup-32bit-Taipan_Bitvector.epf [2021-11-20 23:37:36,859 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:37:36,859 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:37:36,860 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:37:36,860 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:37:36,861 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:37:36,861 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:37:36,861 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:37:36,862 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:37:36,862 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:37:36,862 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:37:36,863 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:37:36,864 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:37:36,865 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 23:37:36,865 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 23:37:36,866 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:37:36,866 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 23:37:36,866 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-20 23:37:36,866 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 23:37:36,866 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 23:37:36,867 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:37:36,867 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-20 23:37:36,867 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-20 23:37:36,867 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:37:36,868 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-20 23:37:36,868 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-20 23:37:36,868 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-20 23:37:36,868 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 23:37:36,868 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:37:36,869 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:37:36,869 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 23:37:36,869 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:37:36,870 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:37:36,870 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:37:36,870 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:37:36,870 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-20 23:37:36,871 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-20 23:37:36,871 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:37:36,871 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:37:36,871 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f8d14145608efc0a8f321a178564faff63399ecbab28641c0c2971fec318068f [2021-11-20 23:37:37,243 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:37:37,264 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:37:37,268 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:37:37,270 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:37:37,270 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:37:37,272 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i [2021-11-20 23:37:37,360 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/data/a938ac3ee/939493036d864e99b2c3f02d8ec75d91/FLAGd795c369a [2021-11-20 23:37:37,993 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:37:37,994 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i [2021-11-20 23:37:38,013 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/data/a938ac3ee/939493036d864e99b2c3f02d8ec75d91/FLAGd795c369a [2021-11-20 23:37:38,269 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/data/a938ac3ee/939493036d864e99b2c3f02d8ec75d91 [2021-11-20 23:37:38,272 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:37:38,273 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:37:38,275 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:37:38,275 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:37:38,279 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:37:38,280 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:37:38" (1/1) ... [2021-11-20 23:37:38,281 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75b20080 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:37:38, skipping insertion in model container [2021-11-20 23:37:38,281 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:37:38" (1/1) ... [2021-11-20 23:37:38,289 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:37:38,354 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:37:38,671 WARN L230 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_ae1d0074-6c60-4715-8598-310b6d43c756/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i[22636,22649] [2021-11-20 23:37:38,739 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:37:38,755 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 23:37:38,827 WARN L230 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_ae1d0074-6c60-4715-8598-310b6d43c756/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i[22636,22649] [2021-11-20 23:37:38,847 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:37:38,884 INFO L208 MainTranslator]: Completed translation [2021-11-20 23:37:38,885 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:37:38 WrapperNode [2021-11-20 23:37:38,885 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:37:38,886 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 23:37:38,886 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 23:37:38,887 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 23:37:38,894 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:37:38" (1/1) ... [2021-11-20 23:37:38,921 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:37:38" (1/1) ... [2021-11-20 23:37:38,951 INFO L137 Inliner]: procedures = 130, calls = 79, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 201 [2021-11-20 23:37:38,952 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 23:37:38,953 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 23:37:38,953 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 23:37:38,953 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 23:37:38,962 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:37:38" (1/1) ... [2021-11-20 23:37:38,962 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:37:38" (1/1) ... [2021-11-20 23:37:38,970 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:37:38" (1/1) ... [2021-11-20 23:37:38,970 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:37:38" (1/1) ... [2021-11-20 23:37:38,984 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:37:38" (1/1) ... [2021-11-20 23:37:38,993 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:37:38" (1/1) ... [2021-11-20 23:37:38,996 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:37:38" (1/1) ... [2021-11-20 23:37:39,002 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 23:37:39,003 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 23:37:39,004 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 23:37:39,004 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 23:37:39,005 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:37:38" (1/1) ... [2021-11-20 23:37:39,024 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:37:39,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:37:39,069 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 23:37:39,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 23:37:39,128 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2021-11-20 23:37:39,129 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2021-11-20 23:37:39,129 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 23:37:39,129 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 23:37:39,129 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 23:37:39,129 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 23:37:39,130 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 23:37:39,130 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_prev [2021-11-20 23:37:39,130 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_prev [2021-11-20 23:37:39,130 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 23:37:39,130 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-20 23:37:39,130 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-20 23:37:39,131 INFO L130 BoogieDeclarations]: Found specification of procedure chain_node [2021-11-20 23:37:39,131 INFO L138 BoogieDeclarations]: Found implementation of procedure chain_node [2021-11-20 23:37:39,131 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_next [2021-11-20 23:37:39,131 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_next [2021-11-20 23:37:39,131 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 23:37:39,131 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 23:37:39,325 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 23:37:39,326 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 23:37:40,171 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 23:37:40,179 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 23:37:40,179 INFO L301 CfgBuilder]: Removed 33 assume(true) statements. [2021-11-20 23:37:40,181 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:37:40 BoogieIcfgContainer [2021-11-20 23:37:40,182 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 23:37:40,183 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 23:37:40,183 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 23:37:40,186 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 23:37:40,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:37:38" (1/3) ... [2021-11-20 23:37:40,187 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@762f3843 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:37:40, skipping insertion in model container [2021-11-20 23:37:40,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:37:38" (2/3) ... [2021-11-20 23:37:40,188 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@762f3843 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:37:40, skipping insertion in model container [2021-11-20 23:37:40,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:37:40" (3/3) ... [2021-11-20 23:37:40,189 INFO L111 eAbstractionObserver]: Analyzing ICFG sll_to_dll_rev-1.i [2021-11-20 23:37:40,194 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 23:37:40,194 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 83 error locations. [2021-11-20 23:37:40,239 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 23:37:40,245 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 [2021-11-20 23:37:40,246 INFO L340 AbstractCegarLoop]: Starting to check reachability of 83 error locations. [2021-11-20 23:37:40,265 INFO L276 IsEmpty]: Start isEmpty. Operand has 220 states, 117 states have (on average 2.1367521367521367) internal successors, (250), 207 states have internal predecessors, (250), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-20 23:37:40,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-20 23:37:40,272 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:37:40,273 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-20 23:37:40,273 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-11-20 23:37:40,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:37:40,296 INFO L85 PathProgramCache]: Analyzing trace with hash 6220742, now seen corresponding path program 1 times [2021-11-20 23:37:40,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:37:40,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1155834522] [2021-11-20 23:37:40,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:37:40,310 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:37:40,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:37:40,318 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:37:40,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-20 23:37:40,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:37:40,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-20 23:37:40,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:37:40,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:37:40,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:37:40,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:37:40,469 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:37:40,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1155834522] [2021-11-20 23:37:40,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1155834522] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:37:40,470 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:37:40,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-20 23:37:40,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045085320] [2021-11-20 23:37:40,473 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:37:40,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 23:37:40,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:37:40,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 23:37:40,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 23:37:40,517 INFO L87 Difference]: Start difference. First operand has 220 states, 117 states have (on average 2.1367521367521367) internal successors, (250), 207 states have internal predecessors, (250), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:37:40,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:37:40,567 INFO L93 Difference]: Finished difference Result 218 states and 239 transitions. [2021-11-20 23:37:40,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 23:37:40,570 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-11-20 23:37:40,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:37:40,585 INFO L225 Difference]: With dead ends: 218 [2021-11-20 23:37:40,585 INFO L226 Difference]: Without dead ends: 216 [2021-11-20 23:37:40,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 23:37:40,592 INFO L933 BasicCegarLoop]: 239 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:37:40,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:37:40,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-11-20 23:37:40,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2021-11-20 23:37:40,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 113 states have (on average 1.8672566371681416) internal successors, (211), 203 states have internal predecessors, (211), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-20 23:37:40,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 237 transitions. [2021-11-20 23:37:40,668 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 237 transitions. Word has length 4 [2021-11-20 23:37:40,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:37:40,669 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 237 transitions. [2021-11-20 23:37:40,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:37:40,669 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 237 transitions. [2021-11-20 23:37:40,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-20 23:37:40,670 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:37:40,670 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-20 23:37:40,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-20 23:37:40,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:37:40,881 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting chain_nodeErr0REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-11-20 23:37:40,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:37:40,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1692065585, now seen corresponding path program 1 times [2021-11-20 23:37:40,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:37:40,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [807865593] [2021-11-20 23:37:40,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:37:40,883 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:37:40,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:37:40,885 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:37:40,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-20 23:37:40,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:37:40,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 23:37:40,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:37:41,021 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 [2021-11-20 23:37:41,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:37:41,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:37:41,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:37:41,057 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:37:41,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [807865593] [2021-11-20 23:37:41,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [807865593] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:37:41,058 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:37:41,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-20 23:37:41,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570668416] [2021-11-20 23:37:41,059 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:37:41,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:37:41,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:37:41,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:37:41,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:37:41,062 INFO L87 Difference]: Start difference. First operand 216 states and 237 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:37:41,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:37:41,481 INFO L93 Difference]: Finished difference Result 214 states and 235 transitions. [2021-11-20 23:37:41,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:37:41,481 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-20 23:37:41,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:37:41,483 INFO L225 Difference]: With dead ends: 214 [2021-11-20 23:37:41,484 INFO L226 Difference]: Without dead ends: 214 [2021-11-20 23:37:41,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:37:41,485 INFO L933 BasicCegarLoop]: 223 mSDtfsCounter, 17 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 23:37:41,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 361 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 23:37:41,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-11-20 23:37:41,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2021-11-20 23:37:41,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 113 states have (on average 1.8495575221238938) internal successors, (209), 201 states have internal predecessors, (209), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-20 23:37:41,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 235 transitions. [2021-11-20 23:37:41,516 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 235 transitions. Word has length 6 [2021-11-20 23:37:41,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:37:41,516 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 235 transitions. [2021-11-20 23:37:41,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:37:41,517 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 235 transitions. [2021-11-20 23:37:41,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-20 23:37:41,517 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:37:41,517 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-20 23:37:41,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-20 23:37:41,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:37:41,729 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting chain_nodeErr1REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-11-20 23:37:41,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:37:41,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1692065586, now seen corresponding path program 1 times [2021-11-20 23:37:41,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:37:41,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [538190484] [2021-11-20 23:37:41,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:37:41,733 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:37:41,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:37:41,734 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:37:41,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-20 23:37:41,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:37:41,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 23:37:41,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:37:41,846 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 [2021-11-20 23:37:41,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:37:41,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:37:41,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:37:41,978 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:37:41,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [538190484] [2021-11-20 23:37:41,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [538190484] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:37:41,979 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:37:41,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-20 23:37:41,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296681477] [2021-11-20 23:37:41,980 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:37:41,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:37:41,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:37:41,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:37:41,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:37:41,982 INFO L87 Difference]: Start difference. First operand 214 states and 235 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:37:42,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:37:42,500 INFO L93 Difference]: Finished difference Result 212 states and 233 transitions. [2021-11-20 23:37:42,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:37:42,501 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-20 23:37:42,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:37:42,503 INFO L225 Difference]: With dead ends: 212 [2021-11-20 23:37:42,503 INFO L226 Difference]: Without dead ends: 212 [2021-11-20 23:37:42,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:37:42,505 INFO L933 BasicCegarLoop]: 223 mSDtfsCounter, 30 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 23:37:42,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 366 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 23:37:42,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-11-20 23:37:42,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2021-11-20 23:37:42,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 113 states have (on average 1.831858407079646) internal successors, (207), 199 states have internal predecessors, (207), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-20 23:37:42,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 233 transitions. [2021-11-20 23:37:42,526 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 233 transitions. Word has length 6 [2021-11-20 23:37:42,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:37:42,526 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 233 transitions. [2021-11-20 23:37:42,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:37:42,527 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 233 transitions. [2021-11-20 23:37:42,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-20 23:37:42,527 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:37:42,528 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:37:42,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-20 23:37:42,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:37:42,733 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting chain_nodeErr4REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-11-20 23:37:42,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:37:42,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1321164331, now seen corresponding path program 1 times [2021-11-20 23:37:42,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:37:42,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [939967499] [2021-11-20 23:37:42,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:37:42,735 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:37:42,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:37:42,736 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:37:42,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-20 23:37:42,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:37:42,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 23:37:42,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:37:42,891 INFO L354 Elim1Store]: treesize reduction 39, result has 29.1 percent of original size [2021-11-20 23:37:42,892 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 2 case distinctions, treesize of input 12 treesize of output 21 [2021-11-20 23:37:42,983 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-20 23:37:42,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 29 [2021-11-20 23:37:43,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:37:43,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:37:51,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:37:51,401 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:37:51,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [939967499] [2021-11-20 23:37:51,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [939967499] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:37:51,402 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:37:51,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-20 23:37:51,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095673842] [2021-11-20 23:37:51,402 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:37:51,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 23:37:51,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:37:51,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 23:37:51,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=36, Unknown=4, NotChecked=0, Total=56 [2021-11-20 23:37:51,404 INFO L87 Difference]: Start difference. First operand 212 states and 233 transitions. Second operand has 8 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:37:51,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:37:51,876 INFO L93 Difference]: Finished difference Result 225 states and 251 transitions. [2021-11-20 23:37:51,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:37:51,877 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-20 23:37:51,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:37:51,879 INFO L225 Difference]: With dead ends: 225 [2021-11-20 23:37:51,879 INFO L226 Difference]: Without dead ends: 225 [2021-11-20 23:37:51,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=16, Invalid=36, Unknown=4, NotChecked=0, Total=56 [2021-11-20 23:37:51,880 INFO L933 BasicCegarLoop]: 224 mSDtfsCounter, 13 mSDsluCounter, 694 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 918 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 275 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 23:37:51,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 918 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 184 Invalid, 0 Unknown, 275 Unchecked, 0.4s Time] [2021-11-20 23:37:51,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-11-20 23:37:51,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 222. [2021-11-20 23:37:51,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 122 states have (on average 1.7950819672131149) internal successors, (219), 207 states have internal predecessors, (219), 18 states have call successors, (18), 5 states have call predecessors, (18), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-20 23:37:51,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 247 transitions. [2021-11-20 23:37:51,894 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 247 transitions. Word has length 10 [2021-11-20 23:37:51,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:37:51,895 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 247 transitions. [2021-11-20 23:37:51,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:37:51,895 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 247 transitions. [2021-11-20 23:37:51,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-20 23:37:51,896 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:37:51,896 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:37:51,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-20 23:37:52,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:37:52,115 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting chain_nodeErr5REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-11-20 23:37:52,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:37:52,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1321164330, now seen corresponding path program 1 times [2021-11-20 23:37:52,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:37:52,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1041788441] [2021-11-20 23:37:52,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:37:52,117 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:37:52,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:37:52,118 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:37:52,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-20 23:37:52,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:37:52,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-20 23:37:52,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:37:52,274 INFO L354 Elim1Store]: treesize reduction 39, result has 29.1 percent of original size [2021-11-20 23:37:52,274 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 2 case distinctions, treesize of input 25 treesize of output 33 [2021-11-20 23:37:52,315 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-11-20 23:37:52,316 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 2 case distinctions, treesize of input 33 treesize of output 36 [2021-11-20 23:37:52,449 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 23:37:52,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2021-11-20 23:37:52,458 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 23:37:52,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 22 [2021-11-20 23:37:52,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:37:52,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:37:57,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:37:57,193 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:37:57,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1041788441] [2021-11-20 23:37:57,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1041788441] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:37:57,194 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:37:57,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-20 23:37:57,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63474462] [2021-11-20 23:37:57,194 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:37:57,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 23:37:57,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:37:57,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 23:37:57,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=39, Unknown=1, NotChecked=0, Total=56 [2021-11-20 23:37:57,196 INFO L87 Difference]: Start difference. First operand 222 states and 247 transitions. Second operand has 8 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:37:58,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:37:58,511 INFO L93 Difference]: Finished difference Result 222 states and 246 transitions. [2021-11-20 23:37:58,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 23:37:58,511 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-20 23:37:58,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:37:58,513 INFO L225 Difference]: With dead ends: 222 [2021-11-20 23:37:58,513 INFO L226 Difference]: Without dead ends: 222 [2021-11-20 23:37:58,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=22, Invalid=49, Unknown=1, NotChecked=0, Total=72 [2021-11-20 23:37:58,515 INFO L933 BasicCegarLoop]: 230 mSDtfsCounter, 2 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 954 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 334 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:37:58,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 954 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 330 Invalid, 0 Unknown, 334 Unchecked, 1.2s Time] [2021-11-20 23:37:58,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-11-20 23:37:58,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 222. [2021-11-20 23:37:58,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 122 states have (on average 1.7868852459016393) internal successors, (218), 207 states have internal predecessors, (218), 18 states have call successors, (18), 5 states have call predecessors, (18), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-20 23:37:58,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 246 transitions. [2021-11-20 23:37:58,542 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 246 transitions. Word has length 10 [2021-11-20 23:37:58,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:37:58,543 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 246 transitions. [2021-11-20 23:37:58,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:37:58,543 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 246 transitions. [2021-11-20 23:37:58,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 23:37:58,544 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:37:58,544 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:37:58,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-20 23:37:58,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:37:58,756 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting chain_nodeErr6REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-11-20 23:37:58,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:37:58,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1993578833, now seen corresponding path program 1 times [2021-11-20 23:37:58,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:37:58,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [624688796] [2021-11-20 23:37:58,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:37:58,757 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:37:58,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:37:58,758 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:37:58,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-20 23:37:58,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:37:58,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 23:37:58,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:37:58,840 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 [2021-11-20 23:37:58,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:37:58,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:37:58,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:37:58,963 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:37:58,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [624688796] [2021-11-20 23:37:58,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [624688796] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:37:58,963 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:37:58,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-20 23:37:58,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987968129] [2021-11-20 23:37:58,963 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:37:58,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:37:58,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:37:58,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:37:58,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:37:58,965 INFO L87 Difference]: Start difference. First operand 222 states and 246 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:37:59,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:37:59,573 INFO L93 Difference]: Finished difference Result 221 states and 245 transitions. [2021-11-20 23:37:59,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:37:59,573 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-20 23:37:59,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:37:59,575 INFO L225 Difference]: With dead ends: 221 [2021-11-20 23:37:59,575 INFO L226 Difference]: Without dead ends: 221 [2021-11-20 23:37:59,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-20 23:37:59,577 INFO L933 BasicCegarLoop]: 221 mSDtfsCounter, 32 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 23:37:59,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 635 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 23:37:59,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-11-20 23:37:59,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2021-11-20 23:37:59,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 122 states have (on average 1.778688524590164) internal successors, (217), 206 states have internal predecessors, (217), 18 states have call successors, (18), 5 states have call predecessors, (18), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-20 23:37:59,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 245 transitions. [2021-11-20 23:37:59,586 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 245 transitions. Word has length 11 [2021-11-20 23:37:59,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:37:59,587 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 245 transitions. [2021-11-20 23:37:59,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:37:59,587 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 245 transitions. [2021-11-20 23:37:59,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 23:37:59,588 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:37:59,588 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:37:59,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-20 23:37:59,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:37:59,796 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting chain_nodeErr7REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-11-20 23:37:59,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:37:59,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1993578834, now seen corresponding path program 1 times [2021-11-20 23:37:59,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:37:59,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1871258851] [2021-11-20 23:37:59,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:37:59,797 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:37:59,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:37:59,799 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:37:59,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-20 23:37:59,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:37:59,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 23:37:59,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:37:59,895 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 [2021-11-20 23:38:00,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:38:00,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:38:00,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:38:00,258 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:38:00,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1871258851] [2021-11-20 23:38:00,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1871258851] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:38:00,259 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:38:00,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-20 23:38:00,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744755157] [2021-11-20 23:38:00,259 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:38:00,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 23:38:00,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:38:00,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 23:38:00,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:38:00,260 INFO L87 Difference]: Start difference. First operand 221 states and 245 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:38:01,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:38:01,859 INFO L93 Difference]: Finished difference Result 220 states and 244 transitions. [2021-11-20 23:38:01,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:38:01,864 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-20 23:38:01,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:38:01,866 INFO L225 Difference]: With dead ends: 220 [2021-11-20 23:38:01,866 INFO L226 Difference]: Without dead ends: 220 [2021-11-20 23:38:01,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-20 23:38:01,868 INFO L933 BasicCegarLoop]: 221 mSDtfsCounter, 39 mSDsluCounter, 715 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 936 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-20 23:38:01,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 936 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-20 23:38:01,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-11-20 23:38:01,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2021-11-20 23:38:01,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 122 states have (on average 1.7704918032786885) internal successors, (216), 205 states have internal predecessors, (216), 18 states have call successors, (18), 5 states have call predecessors, (18), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-20 23:38:01,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 244 transitions. [2021-11-20 23:38:01,877 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 244 transitions. Word has length 11 [2021-11-20 23:38:01,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:38:01,877 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 244 transitions. [2021-11-20 23:38:01,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:38:01,878 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 244 transitions. [2021-11-20 23:38:01,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-20 23:38:01,878 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:38:01,878 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:38:01,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-20 23:38:02,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:38:02,083 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting chain_nodeErr8REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-11-20 23:38:02,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:38:02,083 INFO L85 PathProgramCache]: Analyzing trace with hash 273848882, now seen corresponding path program 1 times [2021-11-20 23:38:02,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:38:02,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2061286124] [2021-11-20 23:38:02,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:38:02,084 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:38:02,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:38:02,085 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:38:02,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-20 23:38:02,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:38:02,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 23:38:02,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:38:02,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:38:02,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:38:02,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:38:02,231 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:38:02,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2061286124] [2021-11-20 23:38:02,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2061286124] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:38:02,231 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:38:02,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-20 23:38:02,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848595840] [2021-11-20 23:38:02,231 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:38:02,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:38:02,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:38:02,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:38:02,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:38:02,232 INFO L87 Difference]: Start difference. First operand 220 states and 244 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:38:02,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:38:02,510 INFO L93 Difference]: Finished difference Result 219 states and 243 transitions. [2021-11-20 23:38:02,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:38:02,512 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-20 23:38:02,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:38:02,514 INFO L225 Difference]: With dead ends: 219 [2021-11-20 23:38:02,514 INFO L226 Difference]: Without dead ends: 219 [2021-11-20 23:38:02,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:38:02,515 INFO L933 BasicCegarLoop]: 227 mSDtfsCounter, 3 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:38:02,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 368 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 23:38:02,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-11-20 23:38:02,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2021-11-20 23:38:02,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 122 states have (on average 1.7622950819672132) internal successors, (215), 204 states have internal predecessors, (215), 18 states have call successors, (18), 5 states have call predecessors, (18), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-20 23:38:02,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 243 transitions. [2021-11-20 23:38:02,523 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 243 transitions. Word has length 13 [2021-11-20 23:38:02,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:38:02,523 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 243 transitions. [2021-11-20 23:38:02,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:38:02,524 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 243 transitions. [2021-11-20 23:38:02,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-20 23:38:02,524 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:38:02,525 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:38:02,548 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-20 23:38:02,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:38:02,738 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting chain_nodeErr9REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-11-20 23:38:02,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:38:02,739 INFO L85 PathProgramCache]: Analyzing trace with hash 273848883, now seen corresponding path program 1 times [2021-11-20 23:38:02,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:38:02,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1534454990] [2021-11-20 23:38:02,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:38:02,739 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:38:02,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:38:02,740 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:38:02,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-20 23:38:02,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:38:02,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 23:38:02,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:38:02,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:38:02,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:38:03,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-11-20 23:38:03,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:38:03,164 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:38:03,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1534454990] [2021-11-20 23:38:03,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1534454990] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:38:03,165 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:38:03,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-20 23:38:03,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506513864] [2021-11-20 23:38:03,165 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:38:03,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 23:38:03,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:38:03,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 23:38:03,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-20 23:38:03,167 INFO L87 Difference]: Start difference. First operand 219 states and 243 transitions. Second operand has 10 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:38:03,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:38:03,935 INFO L93 Difference]: Finished difference Result 218 states and 242 transitions. [2021-11-20 23:38:03,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:38:03,938 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-20 23:38:03,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:38:03,940 INFO L225 Difference]: With dead ends: 218 [2021-11-20 23:38:03,940 INFO L226 Difference]: Without dead ends: 218 [2021-11-20 23:38:03,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-20 23:38:03,941 INFO L933 BasicCegarLoop]: 215 mSDtfsCounter, 45 mSDsluCounter, 1363 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 1578 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 23:38:03,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 1578 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-20 23:38:03,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-11-20 23:38:03,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2021-11-20 23:38:03,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 122 states have (on average 1.7540983606557377) internal successors, (214), 203 states have internal predecessors, (214), 18 states have call successors, (18), 5 states have call predecessors, (18), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-20 23:38:03,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 242 transitions. [2021-11-20 23:38:03,949 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 242 transitions. Word has length 13 [2021-11-20 23:38:03,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:38:03,950 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 242 transitions. [2021-11-20 23:38:03,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:38:03,950 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 242 transitions. [2021-11-20 23:38:03,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-20 23:38:03,951 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:38:03,951 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:38:03,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-20 23:38:04,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:38:04,167 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-11-20 23:38:04,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:38:04,167 INFO L85 PathProgramCache]: Analyzing trace with hash 343740436, now seen corresponding path program 1 times [2021-11-20 23:38:04,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:38:04,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [14611471] [2021-11-20 23:38:04,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:38:04,169 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:38:04,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:38:04,170 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:38:04,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-20 23:38:04,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:38:04,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 23:38:04,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:38:04,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:38:04,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:38:04,512 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-20 23:38:04,513 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 20 treesize of output 19 [2021-11-20 23:38:04,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:38:04,546 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:38:04,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [14611471] [2021-11-20 23:38:04,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [14611471] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:38:04,547 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:38:04,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-20 23:38:04,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141838719] [2021-11-20 23:38:04,547 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:38:04,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:38:04,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:38:04,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:38:04,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:38:04,548 INFO L87 Difference]: Start difference. First operand 218 states and 242 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 23:38:05,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:38:05,048 INFO L93 Difference]: Finished difference Result 214 states and 238 transitions. [2021-11-20 23:38:05,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:38:05,049 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-11-20 23:38:05,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:38:05,051 INFO L225 Difference]: With dead ends: 214 [2021-11-20 23:38:05,051 INFO L226 Difference]: Without dead ends: 214 [2021-11-20 23:38:05,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:38:05,052 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 31 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 23:38:05,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 659 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 23:38:05,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-11-20 23:38:05,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 212. [2021-11-20 23:38:05,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 120 states have (on average 1.7166666666666666) internal successors, (206), 198 states have internal predecessors, (206), 18 states have call successors, (18), 5 states have call predecessors, (18), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-20 23:38:05,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 234 transitions. [2021-11-20 23:38:05,067 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 234 transitions. Word has length 17 [2021-11-20 23:38:05,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:38:05,067 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 234 transitions. [2021-11-20 23:38:05,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 23:38:05,068 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 234 transitions. [2021-11-20 23:38:05,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-20 23:38:05,068 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:38:05,069 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:38:05,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-20 23:38:05,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:38:05,276 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-11-20 23:38:05,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:38:05,276 INFO L85 PathProgramCache]: Analyzing trace with hash 343740437, now seen corresponding path program 1 times [2021-11-20 23:38:05,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:38:05,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [452767183] [2021-11-20 23:38:05,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:38:05,276 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:38:05,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:38:05,277 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:38:05,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-20 23:38:05,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:38:05,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 23:38:05,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:38:05,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:38:05,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:38:05,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-11-20 23:38:05,989 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:38:05,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2021-11-20 23:38:06,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:38:06,332 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:38:06,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [452767183] [2021-11-20 23:38:06,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [452767183] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:38:06,333 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:38:06,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-20 23:38:06,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865436292] [2021-11-20 23:38:06,333 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:38:06,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 23:38:06,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:38:06,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 23:38:06,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-20 23:38:06,335 INFO L87 Difference]: Start difference. First operand 212 states and 234 transitions. Second operand has 10 states, 7 states have (on average 4.142857142857143) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 23:38:07,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:38:07,587 INFO L93 Difference]: Finished difference Result 209 states and 231 transitions. [2021-11-20 23:38:07,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:38:07,589 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 4.142857142857143) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2021-11-20 23:38:07,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:38:07,590 INFO L225 Difference]: With dead ends: 209 [2021-11-20 23:38:07,590 INFO L226 Difference]: Without dead ends: 209 [2021-11-20 23:38:07,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-20 23:38:07,591 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 23 mSDsluCounter, 1191 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 1397 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:38:07,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 1397 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-20 23:38:07,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-11-20 23:38:07,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2021-11-20 23:38:07,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 120 states have (on average 1.6916666666666667) internal successors, (203), 195 states have internal predecessors, (203), 18 states have call successors, (18), 5 states have call predecessors, (18), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-20 23:38:07,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 231 transitions. [2021-11-20 23:38:07,600 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 231 transitions. Word has length 17 [2021-11-20 23:38:07,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:38:07,600 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 231 transitions. [2021-11-20 23:38:07,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 4.142857142857143) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 23:38:07,601 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 231 transitions. [2021-11-20 23:38:07,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-20 23:38:07,601 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:38:07,601 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:38:07,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-20 23:38:07,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:38:07,812 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-11-20 23:38:07,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:38:07,813 INFO L85 PathProgramCache]: Analyzing trace with hash 2066019085, now seen corresponding path program 1 times [2021-11-20 23:38:07,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:38:07,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1301998088] [2021-11-20 23:38:07,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:38:07,813 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:38:07,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:38:07,814 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:38:07,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-20 23:38:07,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:38:07,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 23:38:07,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:38:07,978 INFO L354 Elim1Store]: treesize reduction 38, result has 30.9 percent of original size [2021-11-20 23:38:07,978 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 2 case distinctions, treesize of input 27 treesize of output 34 [2021-11-20 23:38:08,270 INFO L354 Elim1Store]: treesize reduction 57, result has 30.5 percent of original size [2021-11-20 23:38:08,270 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 40 treesize of output 57 [2021-11-20 23:38:08,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:38:08,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:38:08,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:38:08,836 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:38:08,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1301998088] [2021-11-20 23:38:08,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1301998088] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:38:08,837 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:38:08,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 3] imperfect sequences [] total 6 [2021-11-20 23:38:08,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338347925] [2021-11-20 23:38:08,837 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:38:08,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 23:38:08,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:38:08,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 23:38:08,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-20 23:38:08,839 INFO L87 Difference]: Start difference. First operand 209 states and 231 transitions. Second operand has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 23:38:09,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:38:09,323 INFO L93 Difference]: Finished difference Result 208 states and 230 transitions. [2021-11-20 23:38:09,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:38:09,325 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-11-20 23:38:09,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:38:09,327 INFO L225 Difference]: With dead ends: 208 [2021-11-20 23:38:09,328 INFO L226 Difference]: Without dead ends: 208 [2021-11-20 23:38:09,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-20 23:38:09,329 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 45 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 331 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 23:38:09,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 617 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 193 Invalid, 0 Unknown, 331 Unchecked, 0.5s Time] [2021-11-20 23:38:09,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-11-20 23:38:09,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2021-11-20 23:38:09,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 120 states have (on average 1.6833333333333333) internal successors, (202), 194 states have internal predecessors, (202), 18 states have call successors, (18), 5 states have call predecessors, (18), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-20 23:38:09,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 230 transitions. [2021-11-20 23:38:09,337 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 230 transitions. Word has length 18 [2021-11-20 23:38:09,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:38:09,337 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 230 transitions. [2021-11-20 23:38:09,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 23:38:09,338 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 230 transitions. [2021-11-20 23:38:09,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-20 23:38:09,339 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:38:09,339 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:38:09,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-20 23:38:09,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:38:09,550 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-11-20 23:38:09,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:38:09,551 INFO L85 PathProgramCache]: Analyzing trace with hash 2066019086, now seen corresponding path program 1 times [2021-11-20 23:38:09,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:38:09,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1987072234] [2021-11-20 23:38:09,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:38:09,551 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:38:09,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:38:09,552 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:38:09,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-20 23:38:09,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:38:09,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 23:38:09,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:38:09,740 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-11-20 23:38:09,740 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 2 case distinctions, treesize of input 24 treesize of output 27 [2021-11-20 23:38:09,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2021-11-20 23:38:10,076 INFO L354 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2021-11-20 23:38:10,076 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 30 treesize of output 50 [2021-11-20 23:38:12,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:38:12,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:38:15,549 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_4| (_ BitVec 32)) (|v_chain_node_alloc_node_~ptr~0#1.base_34| (_ BitVec 32)) (|v_ULTIMATE.start_create_sll_~pp2#1.offset_BEFORE_CALL_2| (_ BitVec 32))) (let ((.cse0 (bvadd (_ bv4 32) |v_ULTIMATE.start_create_sll_~pp2#1.offset_BEFORE_CALL_2|))) (or (bvule .cse0 (select (store |c_#length| |v_chain_node_alloc_node_~ptr~0#1.base_34| (_ bv8 32)) |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_4|)) (not (bvule |v_ULTIMATE.start_create_sll_~pp2#1.offset_BEFORE_CALL_2| .cse0)) (exists ((|v_chain_node_alloc_node_~ptr~0#1.base_33| (_ BitVec 32))) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_create_sll_~pp2#1.offset_BEFORE_CALL_2|) (select (store |c_old(#length)| |v_chain_node_alloc_node_~ptr~0#1.base_33| (_ bv8 32)) |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_4|))))))) is different from false [2021-11-20 23:38:15,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:38:15,568 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:38:15,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1987072234] [2021-11-20 23:38:15,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1987072234] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:38:15,568 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:38:15,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-20 23:38:15,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062105069] [2021-11-20 23:38:15,568 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:38:15,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 23:38:15,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:38:15,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 23:38:15,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=51, Unknown=1, NotChecked=14, Total=90 [2021-11-20 23:38:15,570 INFO L87 Difference]: Start difference. First operand 208 states and 230 transitions. Second operand has 10 states, 7 states have (on average 4.428571428571429) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 23:38:17,594 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_4| (_ BitVec 32)) (|v_chain_node_alloc_node_~ptr~0#1.base_34| (_ BitVec 32)) (|v_ULTIMATE.start_create_sll_~pp2#1.offset_BEFORE_CALL_2| (_ BitVec 32))) (let ((.cse0 (bvadd (_ bv4 32) |v_ULTIMATE.start_create_sll_~pp2#1.offset_BEFORE_CALL_2|))) (or (bvule .cse0 (select (store |c_#length| |v_chain_node_alloc_node_~ptr~0#1.base_34| (_ bv8 32)) |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_4|)) (not (bvule |v_ULTIMATE.start_create_sll_~pp2#1.offset_BEFORE_CALL_2| .cse0)) (exists ((|v_chain_node_alloc_node_~ptr~0#1.base_33| (_ BitVec 32))) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_create_sll_~pp2#1.offset_BEFORE_CALL_2|) (select (store |c_old(#length)| |v_chain_node_alloc_node_~ptr~0#1.base_33| (_ bv8 32)) |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_4|))))))) (= |c_#length| |c_old(#length)|)) is different from false [2021-11-20 23:38:17,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:38:17,947 INFO L93 Difference]: Finished difference Result 228 states and 254 transitions. [2021-11-20 23:38:17,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 23:38:17,948 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 4.428571428571429) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-11-20 23:38:17,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:38:17,950 INFO L225 Difference]: With dead ends: 228 [2021-11-20 23:38:17,950 INFO L226 Difference]: Without dead ends: 228 [2021-11-20 23:38:17,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=26, Invalid=52, Unknown=2, NotChecked=30, Total=110 [2021-11-20 23:38:17,951 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 46 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 827 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 589 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:38:17,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 827 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 73 Invalid, 0 Unknown, 589 Unchecked, 0.3s Time] [2021-11-20 23:38:17,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-11-20 23:38:17,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 225. [2021-11-20 23:38:17,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 135 states have (on average 1.6296296296296295) internal successors, (220), 208 states have internal predecessors, (220), 19 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-20 23:38:17,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 250 transitions. [2021-11-20 23:38:17,961 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 250 transitions. Word has length 18 [2021-11-20 23:38:17,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:38:17,961 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 250 transitions. [2021-11-20 23:38:17,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 4.428571428571429) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 23:38:17,962 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 250 transitions. [2021-11-20 23:38:17,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-20 23:38:17,963 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:38:17,963 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:38:17,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-20 23:38:18,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:38:18,174 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-11-20 23:38:18,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:38:18,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1434990185, now seen corresponding path program 1 times [2021-11-20 23:38:18,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:38:18,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1928481921] [2021-11-20 23:38:18,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:38:18,176 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:38:18,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:38:18,177 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:38:18,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-20 23:38:18,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:38:18,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 23:38:18,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:38:18,366 INFO L354 Elim1Store]: treesize reduction 39, result has 29.1 percent of original size [2021-11-20 23:38:18,366 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 3 case distinctions, treesize of input 24 treesize of output 30 [2021-11-20 23:38:18,686 INFO L354 Elim1Store]: treesize reduction 65, result has 20.7 percent of original size [2021-11-20 23:38:18,687 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 46 treesize of output 55 [2021-11-20 23:38:18,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:38:18,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:38:25,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:38:25,509 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:38:25,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1928481921] [2021-11-20 23:38:25,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1928481921] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:38:25,509 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:38:25,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-11-20 23:38:25,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898945008] [2021-11-20 23:38:25,510 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:38:25,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 23:38:25,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:38:25,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 23:38:25,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=96, Unknown=1, NotChecked=0, Total=132 [2021-11-20 23:38:25,511 INFO L87 Difference]: Start difference. First operand 225 states and 250 transitions. Second operand has 12 states, 9 states have (on average 4.333333333333333) internal successors, (39), 10 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 23:38:25,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:38:25,817 INFO L93 Difference]: Finished difference Result 248 states and 279 transitions. [2021-11-20 23:38:25,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 23:38:25,818 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 4.333333333333333) internal successors, (39), 10 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2021-11-20 23:38:25,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:38:25,820 INFO L225 Difference]: With dead ends: 248 [2021-11-20 23:38:25,821 INFO L226 Difference]: Without dead ends: 248 [2021-11-20 23:38:25,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=35, Invalid=96, Unknown=1, NotChecked=0, Total=132 [2021-11-20 23:38:25,822 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 65 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 333 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:38:25,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 639 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 75 Invalid, 0 Unknown, 333 Unchecked, 0.3s Time] [2021-11-20 23:38:25,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-11-20 23:38:25,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 245. [2021-11-20 23:38:25,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 153 states have (on average 1.5816993464052287) internal successors, (242), 226 states have internal predecessors, (242), 20 states have call successors, (20), 7 states have call predecessors, (20), 5 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-20 23:38:25,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 274 transitions. [2021-11-20 23:38:25,832 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 274 transitions. Word has length 22 [2021-11-20 23:38:25,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:38:25,833 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 274 transitions. [2021-11-20 23:38:25,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 4.333333333333333) internal successors, (39), 10 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 23:38:25,833 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 274 transitions. [2021-11-20 23:38:25,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-20 23:38:25,834 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:38:25,834 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:38:25,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-20 23:38:26,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:38:26,046 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-11-20 23:38:26,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:38:26,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1434990184, now seen corresponding path program 1 times [2021-11-20 23:38:26,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:38:26,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1420934462] [2021-11-20 23:38:26,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:38:26,047 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:38:26,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:38:26,048 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:38:26,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-20 23:38:26,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:38:26,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 23:38:26,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:38:26,236 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-11-20 23:38:26,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 24 [2021-11-20 23:38:26,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2021-11-20 23:38:26,545 INFO L354 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2021-11-20 23:38:26,545 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 26 treesize of output 46 [2021-11-20 23:38:28,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:38:28,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:38:31,296 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_create_sll_~pp1#1.offset_BEFORE_CALL_2| (_ BitVec 32)) (|v_chain_node_alloc_node_~ptr~0#1.base_42| (_ BitVec 32)) (|v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_4| (_ BitVec 32))) (let ((.cse0 (bvadd (_ bv4 32) |v_ULTIMATE.start_create_sll_~pp1#1.offset_BEFORE_CALL_2|))) (or (not (bvule |v_ULTIMATE.start_create_sll_~pp1#1.offset_BEFORE_CALL_2| .cse0)) (exists ((|v_chain_node_alloc_node_~ptr~0#1.base_41| (_ BitVec 32))) (not (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_create_sll_~pp1#1.offset_BEFORE_CALL_2|) (select (store |c_old(#length)| |v_chain_node_alloc_node_~ptr~0#1.base_41| (_ bv8 32)) |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_4|)))) (bvule .cse0 (select (store |c_#length| |v_chain_node_alloc_node_~ptr~0#1.base_42| (_ bv8 32)) |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_4|))))) is different from false [2021-11-20 23:38:31,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:38:31,315 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:38:31,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1420934462] [2021-11-20 23:38:31,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1420934462] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:38:31,315 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:38:31,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-20 23:38:31,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80827793] [2021-11-20 23:38:31,315 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:38:31,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 23:38:31,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:38:31,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 23:38:31,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=51, Unknown=1, NotChecked=14, Total=90 [2021-11-20 23:38:31,316 INFO L87 Difference]: Start difference. First operand 245 states and 274 transitions. Second operand has 10 states, 7 states have (on average 5.571428571428571) internal successors, (39), 8 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 23:38:32,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:38:32,344 INFO L93 Difference]: Finished difference Result 265 states and 297 transitions. [2021-11-20 23:38:32,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 23:38:32,345 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 5.571428571428571) internal successors, (39), 8 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2021-11-20 23:38:32,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:38:32,348 INFO L225 Difference]: With dead ends: 265 [2021-11-20 23:38:32,348 INFO L226 Difference]: Without dead ends: 265 [2021-11-20 23:38:32,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=24, Invalid=51, Unknown=1, NotChecked=14, Total=90 [2021-11-20 23:38:32,349 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 54 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 288 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:38:32,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 580 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 183 Invalid, 0 Unknown, 288 Unchecked, 1.0s Time] [2021-11-20 23:38:32,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-11-20 23:38:32,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 262. [2021-11-20 23:38:32,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 168 states have (on average 1.5416666666666667) internal successors, (259), 242 states have internal predecessors, (259), 21 states have call successors, (21), 8 states have call predecessors, (21), 6 states have return successors, (13), 11 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-20 23:38:32,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 293 transitions. [2021-11-20 23:38:32,367 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 293 transitions. Word has length 22 [2021-11-20 23:38:32,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:38:32,368 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 293 transitions. [2021-11-20 23:38:32,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 5.571428571428571) internal successors, (39), 8 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 23:38:32,368 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 293 transitions. [2021-11-20 23:38:32,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-20 23:38:32,369 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:38:32,370 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:38:32,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-20 23:38:32,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:38:32,576 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting chain_nodeErr5REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-11-20 23:38:32,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:38:32,576 INFO L85 PathProgramCache]: Analyzing trace with hash 823372382, now seen corresponding path program 1 times [2021-11-20 23:38:32,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:38:32,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1334267254] [2021-11-20 23:38:32,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:38:32,577 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:38:32,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:38:32,577 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:38:32,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-20 23:38:32,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:38:32,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-20 23:38:32,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:38:32,995 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 23:38:32,995 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 30 treesize of output 32 [2021-11-20 23:38:33,011 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 23:38:33,011 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 29 treesize of output 29 [2021-11-20 23:38:33,190 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:38:33,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:38:34,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2021-11-20 23:38:34,050 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-20 23:38:34,051 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 47 treesize of output 46 [2021-11-20 23:38:34,432 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:38:34,432 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 46 treesize of output 50 [2021-11-20 23:38:34,458 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-20 23:38:34,459 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 50 treesize of output 49 [2021-11-20 23:38:34,999 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:38:34,999 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:38:35,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1334267254] [2021-11-20 23:38:35,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1334267254] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:38:35,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [248385271] [2021-11-20 23:38:35,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:38:35,000 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-20 23:38:35,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-20 23:38:35,007 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-20 23:38:35,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-20 23:38:35,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:38:35,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-20 23:38:35,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:38:35,327 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-11-20 23:38:35,328 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 2 case distinctions, treesize of input 12 treesize of output 16 [2021-11-20 23:38:35,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-11-20 23:38:36,207 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 23:38:36,207 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 15 treesize of output 17 [2021-11-20 23:38:36,711 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-20 23:38:36,711 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 26 treesize of output 31 [2021-11-20 23:38:37,384 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:38:37,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:38:53,262 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:38:53,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [248385271] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:38:53,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846510959] [2021-11-20 23:38:53,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:38:53,263 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:38:53,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:38:53,265 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:38:53,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-20 23:38:53,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:38:53,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-20 23:38:53,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:38:53,415 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-11-20 23:38:53,415 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 2 case distinctions, treesize of input 25 treesize of output 28 [2021-11-20 23:38:53,467 INFO L354 Elim1Store]: treesize reduction 39, result has 29.1 percent of original size [2021-11-20 23:38:53,467 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 2 case distinctions, treesize of input 28 treesize of output 36 [2021-11-20 23:38:54,275 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 23:38:54,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2021-11-20 23:38:54,282 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 23:38:54,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 22 [2021-11-20 23:38:54,714 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-20 23:38:54,714 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 34 treesize of output 39 [2021-11-20 23:38:54,724 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 23:38:54,724 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 33 treesize of output 29 [2021-11-20 23:38:55,013 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:38:55,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:38:55,574 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-20 23:38:55,574 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 42 treesize of output 41 [2021-11-20 23:39:08,385 WARN L860 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_create_sll_~#list~0#1.offset_BEFORE_CALL_13| (_ BitVec 32)) (|v_chain_node_alloc_node_~ptr~0#1.base_43| (_ BitVec 32))) (or (exists ((|v_chain_node_alloc_node_~ptr~0#1.base_57| (_ BitVec 32)) (|v_chain_node_alloc_node_~ptr~0#1.base_43| (_ BitVec 32))) (and (let ((.cse0 (bvadd (_ bv4 32) |v_ULTIMATE.start_create_sll_~#list~0#1.offset_BEFORE_CALL_13|))) (or (not (bvule .cse0 (select (store (store |c_old(#length)| |v_chain_node_alloc_node_~ptr~0#1.base_57| (_ bv8 32)) |v_chain_node_alloc_node_~ptr~0#1.base_43| (_ bv8 32)) |c_chain_node_#in~ppnode#1.base|))) (not (bvule |v_ULTIMATE.start_create_sll_~#list~0#1.offset_BEFORE_CALL_13| .cse0)))) (not (= |c_chain_node_#in~ppnode#1.base| |v_chain_node_alloc_node_~ptr~0#1.base_43|)) (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_chain_node_alloc_node_~ptr~0#1.base_57|))))))) (not (= (_ bv0 1) (select |c_#valid| |v_chain_node_alloc_node_~ptr~0#1.base_43|))) (let ((.cse1 (bvadd (_ bv4 32) |v_ULTIMATE.start_create_sll_~#list~0#1.offset_BEFORE_CALL_13|))) (and (bvule .cse1 (select (store |c_#length| |v_chain_node_alloc_node_~ptr~0#1.base_43| (_ bv8 32)) |c_chain_node_#in~ppnode#1.base|)) (bvule |v_ULTIMATE.start_create_sll_~#list~0#1.offset_BEFORE_CALL_13| .cse1))))) is different from true [2021-11-20 23:39:16,853 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-20 23:39:16,853 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 67 treesize of output 66 [2021-11-20 23:40:07,000 WARN L860 $PredicateComparison]: unable to prove that (forall ((|v_chain_node_alloc_node_~ptr~0#1.base_58| (_ BitVec 32)) (|v_ULTIMATE.start_create_sll_~#list~0#1.offset_BEFORE_CALL_13| (_ BitVec 32)) (|v_chain_node_alloc_node_~ptr~0#1.base_43| (_ BitVec 32))) (or (let ((.cse0 (bvadd (_ bv4 32) |v_ULTIMATE.start_create_sll_~#list~0#1.offset_BEFORE_CALL_13|))) (and (bvule .cse0 (select (store (store |c_#length| |v_chain_node_alloc_node_~ptr~0#1.base_58| (_ bv8 32)) |v_chain_node_alloc_node_~ptr~0#1.base_43| (_ bv8 32)) |c_chain_node_#in~ppnode#1.base|)) (bvule |v_ULTIMATE.start_create_sll_~#list~0#1.offset_BEFORE_CALL_13| .cse0))) (= |c_chain_node_#in~ppnode#1.base| |v_chain_node_alloc_node_~ptr~0#1.base_43|) (exists ((|v_chain_node_alloc_node_~ptr~0#1.base_57| (_ BitVec 32)) (v_prenex_1 (_ BitVec 32))) (and (let ((.cse1 (bvadd (_ bv4 32) |v_ULTIMATE.start_create_sll_~#list~0#1.offset_BEFORE_CALL_13|))) (or (not (bvule .cse1 (select (store (store |c_old(#length)| |v_chain_node_alloc_node_~ptr~0#1.base_57| (_ bv8 32)) v_prenex_1 (_ bv8 32)) |c_chain_node_#in~ppnode#1.base|))) (not (bvule |v_ULTIMATE.start_create_sll_~#list~0#1.offset_BEFORE_CALL_13| .cse1)))) (not (= |c_chain_node_#in~ppnode#1.base| v_prenex_1)) (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_chain_node_alloc_node_~ptr~0#1.base_57|))))))) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_#valid| |v_chain_node_alloc_node_~ptr~0#1.base_58|)))))))) is different from true [2021-11-20 23:40:07,010 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2021-11-20 23:40:07,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846510959] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:40:07,010 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-20 23:40:07,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9, 6, 8, 8] total 36 [2021-11-20 23:40:07,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108478196] [2021-11-20 23:40:07,011 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-20 23:40:07,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-20 23:40:07,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:40:07,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-20 23:40:07,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1048, Unknown=14, NotChecked=134, Total=1332 [2021-11-20 23:40:07,013 INFO L87 Difference]: Start difference. First operand 262 states and 293 transitions. Second operand has 37 states, 31 states have (on average 3.4516129032258065) internal successors, (107), 28 states have internal predecessors, (107), 10 states have call successors, (11), 10 states have call predecessors, (11), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 23:41:02,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:41:02,258 INFO L93 Difference]: Finished difference Result 275 states and 304 transitions. [2021-11-20 23:41:02,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-20 23:41:02,258 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 31 states have (on average 3.4516129032258065) internal successors, (107), 28 states have internal predecessors, (107), 10 states have call successors, (11), 10 states have call predecessors, (11), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) Word has length 24 [2021-11-20 23:41:02,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:41:02,260 INFO L225 Difference]: With dead ends: 275 [2021-11-20 23:41:02,261 INFO L226 Difference]: Without dead ends: 275 [2021-11-20 23:41:02,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 105 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 106.4s TimeCoverageRelationStatistics Valid=406, Invalid=2334, Unknown=24, NotChecked=206, Total=2970 [2021-11-20 23:41:02,262 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 60 mSDsluCounter, 1605 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 1801 SdHoareTripleChecker+Invalid, 2187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1646 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-20 23:41:02,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 1801 Invalid, 2187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 521 Invalid, 0 Unknown, 1646 Unchecked, 1.8s Time] [2021-11-20 23:41:02,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-11-20 23:41:02,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 267. [2021-11-20 23:41:02,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 172 states have (on average 1.5174418604651163) internal successors, (261), 247 states have internal predecessors, (261), 21 states have call successors, (21), 8 states have call predecessors, (21), 7 states have return successors, (13), 11 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-20 23:41:02,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 295 transitions. [2021-11-20 23:41:02,273 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 295 transitions. Word has length 24 [2021-11-20 23:41:02,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:41:02,273 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 295 transitions. [2021-11-20 23:41:02,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 31 states have (on average 3.4516129032258065) internal successors, (107), 28 states have internal predecessors, (107), 10 states have call successors, (11), 10 states have call predecessors, (11), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 23:41:02,274 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 295 transitions. [2021-11-20 23:41:02,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-20 23:41:02,275 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:41:02,275 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:41:02,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-20 23:41:02,486 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-20 23:41:02,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-20 23:41:02,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:41:02,878 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting chain_nodeErr5REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-11-20 23:41:02,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:41:02,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1531434842, now seen corresponding path program 1 times [2021-11-20 23:41:02,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:41:02,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [835522675] [2021-11-20 23:41:02,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:41:02,879 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:41:02,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:41:02,880 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:41:02,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-20 23:41:03,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:41:03,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-20 23:41:03,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:41:03,414 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 23:41:03,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2021-11-20 23:41:03,429 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 23:41:03,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2021-11-20 23:41:03,599 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:41:03,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:41:04,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2021-11-20 23:41:04,766 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-20 23:41:04,766 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 48 treesize of output 47 [2021-11-20 23:41:05,165 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:41:05,166 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 47 treesize of output 51 [2021-11-20 23:41:05,188 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-20 23:41:05,188 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 51 treesize of output 50 [2021-11-20 23:41:05,649 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:41:05,649 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:41:05,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [835522675] [2021-11-20 23:41:05,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [835522675] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:41:05,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1674155303] [2021-11-20 23:41:05,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:41:05,649 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-20 23:41:05,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-20 23:41:05,650 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-20 23:41:05,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-20 23:41:05,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:41:05,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-20 23:41:05,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:41:05,890 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-11-20 23:41:05,890 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 2 case distinctions, treesize of input 12 treesize of output 16 [2021-11-20 23:41:05,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-11-20 23:41:06,581 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 23:41:06,582 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 15 treesize of output 17 [2021-11-20 23:41:07,039 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-20 23:41:07,040 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 26 treesize of output 31 [2021-11-20 23:41:07,655 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:41:07,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:41:24,555 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:41:24,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1674155303] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:41:24,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771733338] [2021-11-20 23:41:24,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:41:24,555 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:41:24,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:41:24,557 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:41:24,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-20 23:41:24,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:41:24,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-20 23:41:24,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:41:24,702 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-11-20 23:41:24,702 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 2 case distinctions, treesize of input 25 treesize of output 28 [2021-11-20 23:41:24,754 INFO L354 Elim1Store]: treesize reduction 39, result has 29.1 percent of original size [2021-11-20 23:41:24,754 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 2 case distinctions, treesize of input 28 treesize of output 36 [2021-11-20 23:41:25,422 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 23:41:25,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2021-11-20 23:41:25,429 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 23:41:25,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-11-20 23:41:26,018 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-20 23:41:26,019 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 32 treesize of output 37 [2021-11-20 23:41:26,026 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 23:41:26,026 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 31 treesize of output 27 [2021-11-20 23:41:26,283 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:41:26,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:41:26,757 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-20 23:41:26,757 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 34 treesize of output 33 [2021-11-20 23:42:51,708 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:42:51,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771733338] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:42:51,709 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-20 23:42:51,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9, 6, 8, 8] total 36 [2021-11-20 23:42:51,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974265198] [2021-11-20 23:42:51,709 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-20 23:42:51,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-20 23:42:51,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:42:51,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-20 23:42:51,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1162, Unknown=19, NotChecked=0, Total=1332 [2021-11-20 23:42:51,712 INFO L87 Difference]: Start difference. First operand 267 states and 295 transitions. Second operand has 37 states, 31 states have (on average 4.161290322580645) internal successors, (129), 28 states have internal predecessors, (129), 10 states have call successors, (11), 10 states have call predecessors, (11), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 23:43:14,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:43:14,806 INFO L93 Difference]: Finished difference Result 275 states and 303 transitions. [2021-11-20 23:43:14,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 23:43:14,807 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 31 states have (on average 4.161290322580645) internal successors, (129), 28 states have internal predecessors, (129), 10 states have call successors, (11), 10 states have call predecessors, (11), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 28 [2021-11-20 23:43:14,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:43:14,809 INFO L225 Difference]: With dead ends: 275 [2021-11-20 23:43:14,809 INFO L226 Difference]: Without dead ends: 275 [2021-11-20 23:43:14,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 126 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 91.5s TimeCoverageRelationStatistics Valid=258, Invalid=1879, Unknown=25, NotChecked=0, Total=2162 [2021-11-20 23:43:14,811 INFO L933 BasicCegarLoop]: 208 mSDtfsCounter, 39 mSDsluCounter, 2039 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 2247 SdHoareTripleChecker+Invalid, 1344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1140 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:43:14,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 2247 Invalid, 1344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 202 Invalid, 0 Unknown, 1140 Unchecked, 1.0s Time] [2021-11-20 23:43:14,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-11-20 23:43:14,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 275. [2021-11-20 23:43:14,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 179 states have (on average 1.4916201117318435) internal successors, (267), 254 states have internal predecessors, (267), 22 states have call successors, (22), 9 states have call predecessors, (22), 7 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-20 23:43:14,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 303 transitions. [2021-11-20 23:43:14,832 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 303 transitions. Word has length 28 [2021-11-20 23:43:14,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:43:14,832 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 303 transitions. [2021-11-20 23:43:14,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 31 states have (on average 4.161290322580645) internal successors, (129), 28 states have internal predecessors, (129), 10 states have call successors, (11), 10 states have call predecessors, (11), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 23:43:14,833 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 303 transitions. [2021-11-20 23:43:14,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-20 23:43:14,845 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:43:14,845 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:43:14,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-20 23:43:15,072 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-11-20 23:43:15,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-20 23:43:15,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-20 23:43:15,463 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting chain_nodeErr5REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-11-20 23:43:15,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:43:15,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1115907825, now seen corresponding path program 1 times [2021-11-20 23:43:15,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:43:15,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1541472117] [2021-11-20 23:43:15,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:43:15,465 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:43:15,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:43:15,465 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:43:15,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-20 23:43:15,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:43:15,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-20 23:43:15,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:43:16,015 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 23:43:16,015 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 33 treesize of output 35 [2021-11-20 23:43:16,030 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 23:43:16,031 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 32 treesize of output 32 [2021-11-20 23:43:16,199 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:43:16,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:43:17,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 50 [2021-11-20 23:43:17,614 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-20 23:43:17,614 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 50 treesize of output 49 [2021-11-20 23:43:18,110 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:43:18,110 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 48 treesize of output 52 [2021-11-20 23:43:18,133 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-20 23:43:18,133 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 52 treesize of output 51 [2021-11-20 23:43:18,541 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:43:18,541 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:43:18,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1541472117] [2021-11-20 23:43:18,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1541472117] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:43:18,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2130891348] [2021-11-20 23:43:18,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:43:18,541 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-20 23:43:18,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-20 23:43:18,542 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-20 23:43:18,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-20 23:43:18,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:43:18,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-20 23:43:18,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:43:18,830 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-11-20 23:43:18,831 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 2 case distinctions, treesize of input 12 treesize of output 16 [2021-11-20 23:43:18,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-11-20 23:43:19,550 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 23:43:19,550 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 15 treesize of output 17 [2021-11-20 23:43:20,129 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-20 23:43:20,130 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 26 treesize of output 31 [2021-11-20 23:43:20,721 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:43:20,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:43:41,092 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:43:41,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2130891348] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:43:41,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98582436] [2021-11-20 23:43:41,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:43:41,093 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:43:41,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:43:41,094 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:43:41,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-20 23:43:41,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:43:41,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-20 23:43:41,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:43:41,240 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-11-20 23:43:41,240 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 2 case distinctions, treesize of input 25 treesize of output 28 [2021-11-20 23:43:41,323 INFO L354 Elim1Store]: treesize reduction 39, result has 29.1 percent of original size [2021-11-20 23:43:41,324 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 2 case distinctions, treesize of input 28 treesize of output 36 [2021-11-20 23:43:41,954 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 23:43:41,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2021-11-20 23:43:41,962 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 23:43:41,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-11-20 23:43:42,638 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-20 23:43:42,638 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 33 treesize of output 38 [2021-11-20 23:43:42,644 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 23:43:42,645 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 32 treesize of output 28 [2021-11-20 23:43:42,887 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:43:42,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:43:45,715 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-20 23:43:45,715 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 35 treesize of output 34 [2021-11-20 23:44:50,430 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:44:50,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98582436] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:44:50,430 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-20 23:44:50,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9, 6, 8, 8] total 36 [2021-11-20 23:44:50,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026057182] [2021-11-20 23:44:50,430 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-20 23:44:50,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-20 23:44:50,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:44:50,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-20 23:44:50,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1165, Unknown=17, NotChecked=0, Total=1332 [2021-11-20 23:44:50,432 INFO L87 Difference]: Start difference. First operand 275 states and 303 transitions. Second operand has 37 states, 31 states have (on average 4.645161290322581) internal successors, (144), 28 states have internal predecessors, (144), 10 states have call successors, (11), 10 states have call predecessors, (11), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 23:44:59,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:44:59,812 INFO L93 Difference]: Finished difference Result 285 states and 313 transitions. [2021-11-20 23:44:59,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 23:44:59,813 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 31 states have (on average 4.645161290322581) internal successors, (144), 28 states have internal predecessors, (144), 10 states have call successors, (11), 10 states have call predecessors, (11), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 31 [2021-11-20 23:44:59,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:44:59,815 INFO L225 Difference]: With dead ends: 285 [2021-11-20 23:44:59,815 INFO L226 Difference]: Without dead ends: 285 [2021-11-20 23:44:59,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 143 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 63.1s TimeCoverageRelationStatistics Valid=311, Invalid=2022, Unknown=19, NotChecked=0, Total=2352 [2021-11-20 23:44:59,816 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 41 mSDsluCounter, 2266 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 2470 SdHoareTripleChecker+Invalid, 1276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 973 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:44:59,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 2470 Invalid, 1276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 300 Invalid, 0 Unknown, 973 Unchecked, 1.2s Time] [2021-11-20 23:44:59,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-11-20 23:44:59,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 277. [2021-11-20 23:44:59,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 180 states have (on average 1.488888888888889) internal successors, (268), 256 states have internal predecessors, (268), 23 states have call successors, (23), 9 states have call predecessors, (23), 7 states have return successors, (15), 11 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-20 23:44:59,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 306 transitions. [2021-11-20 23:44:59,826 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 306 transitions. Word has length 31 [2021-11-20 23:44:59,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:44:59,827 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 306 transitions. [2021-11-20 23:44:59,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 31 states have (on average 4.645161290322581) internal successors, (144), 28 states have internal predecessors, (144), 10 states have call successors, (11), 10 states have call predecessors, (11), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 23:44:59,827 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 306 transitions. [2021-11-20 23:44:59,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-20 23:44:59,828 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:44:59,828 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:44:59,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-20 23:45:00,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-20 23:45:00,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-20 23:45:00,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-20 23:45:00,461 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-11-20 23:45:00,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:45:00,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1364319342, now seen corresponding path program 1 times [2021-11-20 23:45:00,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:45:00,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [850843110] [2021-11-20 23:45:00,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:45:00,462 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:45:00,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:45:00,463 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:45:00,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-20 23:45:00,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:45:00,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-20 23:45:00,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:45:00,677 INFO L354 Elim1Store]: treesize reduction 39, result has 29.1 percent of original size [2021-11-20 23:45:00,677 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 3 case distinctions, treesize of input 23 treesize of output 29 [2021-11-20 23:45:00,739 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-20 23:45:00,739 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 32 treesize of output 26 [2021-11-20 23:45:01,037 INFO L354 Elim1Store]: treesize reduction 57, result has 30.5 percent of original size [2021-11-20 23:45:01,037 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 38 treesize of output 55 [2021-11-20 23:45:01,372 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-20 23:45:01,373 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 47 treesize of output 41 [2021-11-20 23:45:01,797 INFO L354 Elim1Store]: treesize reduction 65, result has 20.7 percent of original size [2021-11-20 23:45:01,798 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 77 treesize of output 86 [2021-11-20 23:45:02,244 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:45:02,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:45:23,885 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:45:23,886 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:45:23,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [850843110] [2021-11-20 23:45:23,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [850843110] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:45:23,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [936273303] [2021-11-20 23:45:23,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:45:23,886 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-20 23:45:23,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-20 23:45:23,887 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-20 23:45:23,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-20 23:45:24,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:45:24,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-20 23:45:24,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:45:24,352 INFO L354 Elim1Store]: treesize reduction 89, result has 23.9 percent of original size [2021-11-20 23:45:24,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 31 treesize of output 47 [2021-11-20 23:45:24,621 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-11-20 23:45:24,622 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 58 treesize of output 50 [2021-11-20 23:45:24,995 INFO L354 Elim1Store]: treesize reduction 100, result has 20.0 percent of original size [2021-11-20 23:45:24,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 70 treesize of output 85 [2021-11-20 23:45:25,808 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-11-20 23:45:25,808 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 89 treesize of output 81 [2021-11-20 23:45:26,134 INFO L354 Elim1Store]: treesize reduction 92, result has 26.4 percent of original size [2021-11-20 23:45:26,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 100 treesize of output 123 [2021-11-20 23:45:26,992 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:45:26,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:45:34,706 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:45:34,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [936273303] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:45:34,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600367483] [2021-11-20 23:45:34,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:45:34,706 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:45:34,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:45:34,707 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:45:34,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-20 23:45:34,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:45:34,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-20 23:45:34,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:45:34,860 INFO L354 Elim1Store]: treesize reduction 46, result has 27.0 percent of original size [2021-11-20 23:45:34,860 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 4 case distinctions, treesize of input 38 treesize of output 43 [2021-11-20 23:45:35,483 INFO L354 Elim1Store]: treesize reduction 69, result has 34.9 percent of original size [2021-11-20 23:45:35,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 49 treesize of output 76 [2021-11-20 23:45:42,987 INFO L354 Elim1Store]: treesize reduction 92, result has 26.4 percent of original size [2021-11-20 23:45:42,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 85 treesize of output 108 [2021-11-20 23:45:44,348 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 23:45:44,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:46:59,271 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 7 refuted. 4 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:46:59,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600367483] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:46:59,271 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-20 23:46:59,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9, 9, 9, 9] total 40 [2021-11-20 23:46:59,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675057725] [2021-11-20 23:46:59,272 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-20 23:46:59,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-20 23:46:59,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:46:59,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-20 23:46:59,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=1334, Unknown=44, NotChecked=0, Total=1640 [2021-11-20 23:46:59,274 INFO L87 Difference]: Start difference. First operand 277 states and 306 transitions. Second operand has 41 states, 36 states have (on average 4.472222222222222) internal successors, (161), 34 states have internal predecessors, (161), 10 states have call successors, (12), 8 states have call predecessors, (12), 10 states have return successors, (12), 8 states have call predecessors, (12), 10 states have call successors, (12) [2021-11-20 23:47:04,271 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_8| (_ BitVec 32)) (|v_ULTIMATE.start_create_sll_~#list~0#1.base_BEFORE_CALL_36| (_ BitVec 32)) (|v_chain_node_alloc_node_~ptr~0#1.base_94| (_ BitVec 32))) (let ((.cse1 (store |c_#valid| |v_chain_node_alloc_node_~ptr~0#1.base_94| (_ bv1 1)))) (or (exists ((|v_chain_node_alloc_node_~ptr~0#1.base_94| (_ BitVec 32))) (let ((.cse0 (store |c_old(#valid)| |v_chain_node_alloc_node_~ptr~0#1.base_94| (_ bv1 1)))) (and (bvult |v_chain_node_alloc_node_~ptr~0#1.base_94| |c_#StackHeapBarrier|) (= (_ bv0 1) (bvadd (bvneg (select .cse0 |v_ULTIMATE.start_create_sll_~#list~0#1.base_BEFORE_CALL_36|)) (_ bv1 1))) (not (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select .cse0 |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_8|))))))) (_ bv1 1))))))) (not (= (_ bv0 1) (bvadd (bvneg (bvneg (select .cse1 |v_ULTIMATE.start_create_sll_~#list~0#1.base_BEFORE_CALL_36|))) (_ bv1 1)))) (not (bvult |v_chain_node_alloc_node_~ptr~0#1.base_94| |c_#StackHeapBarrier|)) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (select .cse1 |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_8|))))) (_ bv1 1)))))) (= (store |c_old(#valid)| |c_chain_node_alloc_node_~ptr~0#1.base| (_ bv1 1)) |c_#valid|) (or (forall ((|v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_7| (_ BitVec 32))) (or (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_7|)) (_ bv1 1))) (exists ((|v_chain_node_alloc_node_~ptr~0#1.base_94| (_ BitVec 32))) (let ((.cse2 (store |c_old(#valid)| |v_chain_node_alloc_node_~ptr~0#1.base_94| (_ bv1 1)))) (and (bvult |v_chain_node_alloc_node_~ptr~0#1.base_94| |c_#StackHeapBarrier|) (= (_ bv0 1) (bvadd (bvneg (select .cse2 |c_chain_node_#in~ppnode#1.base|)) (_ bv1 1))) (not (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (bvneg (select .cse2 |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_7|))))))))))))) (not (= (_ bv0 1) (bvadd (bvneg (bvneg (select |c_#valid| |c_chain_node_~ppnode#1.base|))) (_ bv1 1))))) (exists ((|chain_node_alloc_node_~ptr~0#1.base| (_ BitVec 32))) (and (= (store |c_old(#valid)| |chain_node_alloc_node_~ptr~0#1.base| (_ bv1 1)) |c_#valid|) (= (_ bv0 1) (select |c_old(#valid)| |chain_node_alloc_node_~ptr~0#1.base|)))) (forall ((|v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_11| (_ BitVec 32))) (or (exists ((|v_chain_node_alloc_node_~ptr~0#1.base_103| (_ BitVec 32))) (and (not (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (select (store |c_old(#valid)| |v_chain_node_alloc_node_~ptr~0#1.base_103| (_ bv1 1)) |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_11|)))))) (bvult |v_chain_node_alloc_node_~ptr~0#1.base_103| |c_#StackHeapBarrier|))) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (select |c_#valid| |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_11|))))))) is different from false [2021-11-20 23:47:06,304 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_8| (_ BitVec 32)) (|v_ULTIMATE.start_create_sll_~#list~0#1.base_BEFORE_CALL_36| (_ BitVec 32)) (|v_chain_node_alloc_node_~ptr~0#1.base_94| (_ BitVec 32))) (let ((.cse1 (store |c_#valid| |v_chain_node_alloc_node_~ptr~0#1.base_94| (_ bv1 1)))) (or (exists ((|v_chain_node_alloc_node_~ptr~0#1.base_94| (_ BitVec 32))) (let ((.cse0 (store |c_old(#valid)| |v_chain_node_alloc_node_~ptr~0#1.base_94| (_ bv1 1)))) (and (bvult |v_chain_node_alloc_node_~ptr~0#1.base_94| |c_#StackHeapBarrier|) (= (_ bv0 1) (bvadd (bvneg (select .cse0 |v_ULTIMATE.start_create_sll_~#list~0#1.base_BEFORE_CALL_36|)) (_ bv1 1))) (not (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select .cse0 |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_8|))))))) (_ bv1 1))))))) (not (= (_ bv0 1) (bvadd (bvneg (bvneg (select .cse1 |v_ULTIMATE.start_create_sll_~#list~0#1.base_BEFORE_CALL_36|))) (_ bv1 1)))) (not (bvult |v_chain_node_alloc_node_~ptr~0#1.base_94| |c_#StackHeapBarrier|)) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (select .cse1 |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_8|))))) (_ bv1 1)))))) (or (forall ((|v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_7| (_ BitVec 32))) (or (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_7|)) (_ bv1 1))) (exists ((|v_chain_node_alloc_node_~ptr~0#1.base_94| (_ BitVec 32))) (let ((.cse2 (store |c_old(#valid)| |v_chain_node_alloc_node_~ptr~0#1.base_94| (_ bv1 1)))) (and (bvult |v_chain_node_alloc_node_~ptr~0#1.base_94| |c_#StackHeapBarrier|) (= (_ bv0 1) (bvadd (bvneg (select .cse2 |c_chain_node_#in~ppnode#1.base|)) (_ bv1 1))) (not (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (bvneg (select .cse2 |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_7|))))))))))))) (not (= (_ bv0 1) (bvadd (bvneg (bvneg (select |c_#valid| |c_chain_node_~ppnode#1.base|))) (_ bv1 1))))) (exists ((|chain_node_alloc_node_~ptr~0#1.base| (_ BitVec 32))) (and (= (store |c_old(#valid)| |chain_node_alloc_node_~ptr~0#1.base| (_ bv1 1)) |c_#valid|) (= (_ bv0 1) (select |c_old(#valid)| |chain_node_alloc_node_~ptr~0#1.base|)))) (forall ((|v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_11| (_ BitVec 32))) (or (exists ((|v_chain_node_alloc_node_~ptr~0#1.base_103| (_ BitVec 32))) (and (not (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (select (store |c_old(#valid)| |v_chain_node_alloc_node_~ptr~0#1.base_103| (_ bv1 1)) |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_11|)))))) (bvult |v_chain_node_alloc_node_~ptr~0#1.base_103| |c_#StackHeapBarrier|))) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (select |c_#valid| |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_11|)))))) (= (store |c_old(#valid)| |c_chain_node_alloc_node_#res#1.base| (_ bv1 1)) |c_#valid|)) is different from false [2021-11-20 23:47:08,319 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_8| (_ BitVec 32)) (|v_ULTIMATE.start_create_sll_~#list~0#1.base_BEFORE_CALL_36| (_ BitVec 32)) (|v_chain_node_alloc_node_~ptr~0#1.base_94| (_ BitVec 32))) (let ((.cse1 (store |c_#valid| |v_chain_node_alloc_node_~ptr~0#1.base_94| (_ bv1 1)))) (or (exists ((|v_chain_node_alloc_node_~ptr~0#1.base_94| (_ BitVec 32))) (let ((.cse0 (store |c_old(#valid)| |v_chain_node_alloc_node_~ptr~0#1.base_94| (_ bv1 1)))) (and (bvult |v_chain_node_alloc_node_~ptr~0#1.base_94| |c_#StackHeapBarrier|) (= (_ bv0 1) (bvadd (bvneg (select .cse0 |v_ULTIMATE.start_create_sll_~#list~0#1.base_BEFORE_CALL_36|)) (_ bv1 1))) (not (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select .cse0 |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_8|))))))) (_ bv1 1))))))) (not (= (_ bv0 1) (bvadd (bvneg (bvneg (select .cse1 |v_ULTIMATE.start_create_sll_~#list~0#1.base_BEFORE_CALL_36|))) (_ bv1 1)))) (not (bvult |v_chain_node_alloc_node_~ptr~0#1.base_94| |c_#StackHeapBarrier|)) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (select .cse1 |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_8|))))) (_ bv1 1)))))) (or (forall ((|v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_7| (_ BitVec 32))) (or (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_7|)) (_ bv1 1))) (exists ((|v_chain_node_alloc_node_~ptr~0#1.base_94| (_ BitVec 32))) (let ((.cse2 (store |c_old(#valid)| |v_chain_node_alloc_node_~ptr~0#1.base_94| (_ bv1 1)))) (and (bvult |v_chain_node_alloc_node_~ptr~0#1.base_94| |c_#StackHeapBarrier|) (= (_ bv0 1) (bvadd (bvneg (select .cse2 |c_chain_node_#in~ppnode#1.base|)) (_ bv1 1))) (not (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (bvneg (select .cse2 |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_7|))))))))))))) (not (= (_ bv0 1) (bvadd (bvneg (bvneg (select |c_#valid| |c_chain_node_~ppnode#1.base|))) (_ bv1 1))))) (exists ((|chain_node_alloc_node_~ptr~0#1.base| (_ BitVec 32))) (and (= (store |c_old(#valid)| |chain_node_alloc_node_~ptr~0#1.base| (_ bv1 1)) |c_#valid|) (= (_ bv0 1) (select |c_old(#valid)| |chain_node_alloc_node_~ptr~0#1.base|)))) (forall ((|v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_11| (_ BitVec 32))) (or (exists ((|v_chain_node_alloc_node_~ptr~0#1.base_103| (_ BitVec 32))) (and (not (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (select (store |c_old(#valid)| |v_chain_node_alloc_node_~ptr~0#1.base_103| (_ bv1 1)) |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_11|)))))) (bvult |v_chain_node_alloc_node_~ptr~0#1.base_103| |c_#StackHeapBarrier|))) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (select |c_#valid| |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_11|)))))) (= (store |c_old(#valid)| |c_chain_node_~node~0#1.base| (_ bv1 1)) |c_#valid|)) is different from false [2021-11-20 23:47:10,369 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_8| (_ BitVec 32)) (|v_ULTIMATE.start_create_sll_~#list~0#1.base_BEFORE_CALL_36| (_ BitVec 32)) (|v_chain_node_alloc_node_~ptr~0#1.base_94| (_ BitVec 32))) (let ((.cse1 (store |c_#valid| |v_chain_node_alloc_node_~ptr~0#1.base_94| (_ bv1 1)))) (or (exists ((|v_chain_node_alloc_node_~ptr~0#1.base_94| (_ BitVec 32))) (let ((.cse0 (store |c_old(#valid)| |v_chain_node_alloc_node_~ptr~0#1.base_94| (_ bv1 1)))) (and (bvult |v_chain_node_alloc_node_~ptr~0#1.base_94| |c_#StackHeapBarrier|) (= (_ bv0 1) (bvadd (bvneg (select .cse0 |v_ULTIMATE.start_create_sll_~#list~0#1.base_BEFORE_CALL_36|)) (_ bv1 1))) (not (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select .cse0 |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_8|))))))) (_ bv1 1))))))) (not (= (_ bv0 1) (bvadd (bvneg (bvneg (select .cse1 |v_ULTIMATE.start_create_sll_~#list~0#1.base_BEFORE_CALL_36|))) (_ bv1 1)))) (not (bvult |v_chain_node_alloc_node_~ptr~0#1.base_94| |c_#StackHeapBarrier|)) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (select .cse1 |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_8|))))) (_ bv1 1)))))) (or (forall ((|v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_7| (_ BitVec 32))) (or (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_7|)) (_ bv1 1))) (exists ((|v_chain_node_alloc_node_~ptr~0#1.base_94| (_ BitVec 32))) (let ((.cse2 (store |c_old(#valid)| |v_chain_node_alloc_node_~ptr~0#1.base_94| (_ bv1 1)))) (and (bvult |v_chain_node_alloc_node_~ptr~0#1.base_94| |c_#StackHeapBarrier|) (= (_ bv0 1) (bvadd (bvneg (select .cse2 |c_chain_node_#in~ppnode#1.base|)) (_ bv1 1))) (not (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (bvneg (select .cse2 |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_7|))))))))))))) (not (= (_ bv0 1) (bvadd (bvneg (bvneg (select |c_#valid| |c_chain_node_~ppnode#1.base|))) (_ bv1 1))))) (exists ((|chain_node_alloc_node_~ptr~0#1.base| (_ BitVec 32))) (and (= (store |c_old(#valid)| |chain_node_alloc_node_~ptr~0#1.base| (_ bv1 1)) |c_#valid|) (= (_ bv0 1) (select |c_old(#valid)| |chain_node_alloc_node_~ptr~0#1.base|)))) (forall ((|v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_11| (_ BitVec 32))) (or (exists ((|v_chain_node_alloc_node_~ptr~0#1.base_103| (_ BitVec 32))) (and (not (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (select (store |c_old(#valid)| |v_chain_node_alloc_node_~ptr~0#1.base_103| (_ bv1 1)) |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_11|)))))) (bvult |v_chain_node_alloc_node_~ptr~0#1.base_103| |c_#StackHeapBarrier|))) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (select |c_#valid| |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_11|))))))) is different from false [2021-11-20 23:47:12,384 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_8| (_ BitVec 32)) (|v_ULTIMATE.start_create_sll_~#list~0#1.base_BEFORE_CALL_36| (_ BitVec 32)) (|v_chain_node_alloc_node_~ptr~0#1.base_94| (_ BitVec 32))) (let ((.cse1 (store |c_#valid| |v_chain_node_alloc_node_~ptr~0#1.base_94| (_ bv1 1)))) (or (exists ((|v_chain_node_alloc_node_~ptr~0#1.base_94| (_ BitVec 32))) (let ((.cse0 (store |c_old(#valid)| |v_chain_node_alloc_node_~ptr~0#1.base_94| (_ bv1 1)))) (and (bvult |v_chain_node_alloc_node_~ptr~0#1.base_94| |c_#StackHeapBarrier|) (= (_ bv0 1) (bvadd (bvneg (select .cse0 |v_ULTIMATE.start_create_sll_~#list~0#1.base_BEFORE_CALL_36|)) (_ bv1 1))) (not (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select .cse0 |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_8|))))))) (_ bv1 1))))))) (not (= (_ bv0 1) (bvadd (bvneg (bvneg (select .cse1 |v_ULTIMATE.start_create_sll_~#list~0#1.base_BEFORE_CALL_36|))) (_ bv1 1)))) (not (bvult |v_chain_node_alloc_node_~ptr~0#1.base_94| |c_#StackHeapBarrier|)) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (select .cse1 |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_8|))))) (_ bv1 1)))))) (exists ((|chain_node_alloc_node_~ptr~0#1.base| (_ BitVec 32))) (and (= (store |c_old(#valid)| |chain_node_alloc_node_~ptr~0#1.base| (_ bv1 1)) |c_#valid|) (= (_ bv0 1) (select |c_old(#valid)| |chain_node_alloc_node_~ptr~0#1.base|)))) (forall ((|v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_7| (_ BitVec 32))) (or (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_7|)) (_ bv1 1))) (exists ((|v_chain_node_alloc_node_~ptr~0#1.base_94| (_ BitVec 32))) (let ((.cse2 (store |c_old(#valid)| |v_chain_node_alloc_node_~ptr~0#1.base_94| (_ bv1 1)))) (and (bvult |v_chain_node_alloc_node_~ptr~0#1.base_94| |c_#StackHeapBarrier|) (= (_ bv0 1) (bvadd (bvneg (select .cse2 |c_chain_node_#in~ppnode#1.base|)) (_ bv1 1))) (not (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (bvneg (select .cse2 |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_7|)))))))))))))) is different from false [2021-11-20 23:47:36,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:47:36,753 INFO L93 Difference]: Finished difference Result 326 states and 363 transitions. [2021-11-20 23:47:36,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-20 23:47:36,754 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 36 states have (on average 4.472222222222222) internal successors, (161), 34 states have internal predecessors, (161), 10 states have call successors, (12), 8 states have call predecessors, (12), 10 states have return successors, (12), 8 states have call predecessors, (12), 10 states have call successors, (12) Word has length 36 [2021-11-20 23:47:36,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:47:36,756 INFO L225 Difference]: With dead ends: 326 [2021-11-20 23:47:36,756 INFO L226 Difference]: Without dead ends: 326 [2021-11-20 23:47:36,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 172 SyntacticMatches, 9 SemanticMatches, 56 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 974 ImplicationChecksByTransitivity, 141.9s TimeCoverageRelationStatistics Valid=480, Invalid=2243, Unknown=53, NotChecked=530, Total=3306 [2021-11-20 23:47:36,758 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 102 mSDsluCounter, 1309 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 1512 SdHoareTripleChecker+Invalid, 847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 707 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-20 23:47:36,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 1512 Invalid, 847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 138 Invalid, 0 Unknown, 707 Unchecked, 1.5s Time] [2021-11-20 23:47:36,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-11-20 23:47:36,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 283. [2021-11-20 23:47:36,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 187 states have (on average 1.46524064171123) internal successors, (274), 261 states have internal predecessors, (274), 22 states have call successors, (22), 10 states have call predecessors, (22), 8 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-20 23:47:36,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 310 transitions. [2021-11-20 23:47:36,770 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 310 transitions. Word has length 36 [2021-11-20 23:47:36,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:47:36,771 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 310 transitions. [2021-11-20 23:47:36,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 36 states have (on average 4.472222222222222) internal successors, (161), 34 states have internal predecessors, (161), 10 states have call successors, (12), 8 states have call predecessors, (12), 10 states have return successors, (12), 8 states have call predecessors, (12), 10 states have call successors, (12) [2021-11-20 23:47:36,772 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 310 transitions. [2021-11-20 23:47:36,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-20 23:47:36,772 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:47:36,773 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:47:36,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-20 23:47:36,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2021-11-20 23:47:37,196 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2021-11-20 23:47:37,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:47:37,388 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-11-20 23:47:37,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:47:37,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1364319343, now seen corresponding path program 1 times [2021-11-20 23:47:37,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:47:37,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1959122674] [2021-11-20 23:47:37,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:47:37,389 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:47:37,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:47:37,390 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:47:37,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1d0074-6c60-4715-8598-310b6d43c756/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-20 23:47:37,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:47:37,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-20 23:47:37,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:47:37,934 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-11-20 23:47:37,935 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 2 case distinctions, treesize of input 22 treesize of output 25 [2021-11-20 23:47:37,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2021-11-20 23:47:38,467 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-20 23:47:38,468 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 26 treesize of output 20 [2021-11-20 23:47:40,215 INFO L354 Elim1Store]: treesize reduction 62, result has 24.4 percent of original size [2021-11-20 23:47:40,215 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 29 treesize of output 41 [2021-11-20 23:47:42,111 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-20 23:47:42,111 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 25 treesize of output 19 [2021-11-20 23:47:44,895 INFO L354 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2021-11-20 23:47:44,895 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 45 treesize of output 53 [2021-11-20 23:47:46,924 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:47:46,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:47:52,464 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_create_sll_~pp1#1.offset_BEFORE_CALL_5| (_ BitVec 32)) (|v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_19| (_ BitVec 32))) (or (let ((.cse0 (bvadd (_ bv4 32) |v_ULTIMATE.start_create_sll_~pp1#1.offset_BEFORE_CALL_5|))) (and (bvule |v_ULTIMATE.start_create_sll_~pp1#1.offset_BEFORE_CALL_5| .cse0) (bvule .cse0 (select |c_#length| |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_19|)))) (exists ((|v_chain_node_alloc_node_~ptr~0#1.base_120| (_ BitVec 32))) (let ((.cse2 (store |c_old(#length)| |v_chain_node_alloc_node_~ptr~0#1.base_120| (_ bv8 32)))) (and (let ((.cse1 (bvadd (_ bv4 32) |v_ULTIMATE.start_create_sll_~pp1#1.offset_BEFORE_CALL_5|))) (or (not (bvule |v_ULTIMATE.start_create_sll_~pp1#1.offset_BEFORE_CALL_5| .cse1)) (not (bvule .cse1 (select .cse2 |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_19|))))) (bvule (bvadd (_ bv4 32) |c_chain_node_#in~ppnode#1.offset|) (select .cse2 |c_chain_node_#in~ppnode#1.base|)) (bvult |v_chain_node_alloc_node_~ptr~0#1.base_120| |c_#StackHeapBarrier|)))))) is different from false