./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/sll2n_append_equal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2n_append_equal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f218eac2d2b52810cb44bb8b3f3f80463ec7e46c8818b20f079ed947cc8e9fd0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 07:15:06,571 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 07:15:06,573 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 07:15:06,616 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 07:15:06,617 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 07:15:06,618 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 07:15:06,620 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 07:15:06,623 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 07:15:06,625 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 07:15:06,627 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 07:15:06,628 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 07:15:06,630 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 07:15:06,630 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 07:15:06,632 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 07:15:06,633 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 07:15:06,635 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 07:15:06,636 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 07:15:06,638 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 07:15:06,641 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 07:15:06,644 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 07:15:06,647 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 07:15:06,649 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 07:15:06,651 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 07:15:06,652 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 07:15:06,657 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 07:15:06,658 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 07:15:06,658 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 07:15:06,660 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 07:15:06,661 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 07:15:06,662 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 07:15:06,663 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 07:15:06,664 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 07:15:06,665 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 07:15:06,667 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 07:15:06,669 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 07:15:06,669 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 07:15:06,670 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 07:15:06,671 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 07:15:06,671 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 07:15:06,673 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 07:15:06,674 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 07:15:06,675 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-20 07:15:06,705 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 07:15:06,706 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 07:15:06,706 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 07:15:06,706 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 07:15:06,707 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 07:15:06,707 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 07:15:06,708 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 07:15:06,709 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 07:15:06,709 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 07:15:06,709 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 07:15:06,709 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 07:15:06,710 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-20 07:15:06,710 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 07:15:06,710 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 07:15:06,710 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 07:15:06,711 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-20 07:15:06,711 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-20 07:15:06,711 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-20 07:15:06,711 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 07:15:06,711 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-20 07:15:06,712 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 07:15:06,712 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 07:15:06,712 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 07:15:06,712 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 07:15:06,713 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 07:15:06,713 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:15:06,713 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 07:15:06,714 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 07:15:06,714 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 07:15:06,714 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 07:15:06,714 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 07:15:06,714 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f218eac2d2b52810cb44bb8b3f3f80463ec7e46c8818b20f079ed947cc8e9fd0 [2021-11-20 07:15:06,956 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 07:15:06,979 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 07:15:06,983 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 07:15:06,985 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 07:15:06,986 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 07:15:06,987 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/list-simple/sll2n_append_equal.i [2021-11-20 07:15:07,074 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/data/92702fd91/815e89f3920b44a9b25e5b19f76fe5dc/FLAG09e2a9a04 [2021-11-20 07:15:07,625 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 07:15:07,626 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/sv-benchmarks/c/list-simple/sll2n_append_equal.i [2021-11-20 07:15:07,651 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/data/92702fd91/815e89f3920b44a9b25e5b19f76fe5dc/FLAG09e2a9a04 [2021-11-20 07:15:07,942 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/data/92702fd91/815e89f3920b44a9b25e5b19f76fe5dc [2021-11-20 07:15:07,944 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 07:15:07,946 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 07:15:07,949 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 07:15:07,949 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 07:15:07,952 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 07:15:07,953 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:15:07" (1/1) ... [2021-11-20 07:15:07,955 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@520a028b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:15:07, skipping insertion in model container [2021-11-20 07:15:07,955 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:15:07" (1/1) ... [2021-11-20 07:15:07,965 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 07:15:08,000 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 07:15:08,377 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_67149c36-1053-4c13-90fd-c7ba120306b6/sv-benchmarks/c/list-simple/sll2n_append_equal.i[24197,24210] [2021-11-20 07:15:08,381 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:15:08,401 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 07:15:08,458 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_67149c36-1053-4c13-90fd-c7ba120306b6/sv-benchmarks/c/list-simple/sll2n_append_equal.i[24197,24210] [2021-11-20 07:15:08,459 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:15:08,490 INFO L208 MainTranslator]: Completed translation [2021-11-20 07:15:08,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:15:08 WrapperNode [2021-11-20 07:15:08,491 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 07:15:08,493 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 07:15:08,493 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 07:15:08,493 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 07:15:08,499 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:15:08" (1/1) ... [2021-11-20 07:15:08,514 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:15:08" (1/1) ... [2021-11-20 07:15:08,540 INFO L137 Inliner]: procedures = 127, calls = 33, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 121 [2021-11-20 07:15:08,540 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 07:15:08,541 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 07:15:08,541 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 07:15:08,542 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 07:15:08,550 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:15:08" (1/1) ... [2021-11-20 07:15:08,551 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:15:08" (1/1) ... [2021-11-20 07:15:08,556 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:15:08" (1/1) ... [2021-11-20 07:15:08,557 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:15:08" (1/1) ... [2021-11-20 07:15:08,568 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:15:08" (1/1) ... [2021-11-20 07:15:08,573 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:15:08" (1/1) ... [2021-11-20 07:15:08,576 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:15:08" (1/1) ... [2021-11-20 07:15:08,584 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 07:15:08,585 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 07:15:08,586 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 07:15:08,586 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 07:15:08,587 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:15:08" (1/1) ... [2021-11-20 07:15:08,607 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:15:08,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:15:08,643 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 07:15:08,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 07:15:08,687 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 07:15:08,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 07:15:08,688 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-11-20 07:15:08,688 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-11-20 07:15:08,688 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 07:15:08,688 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 07:15:08,688 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 07:15:08,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 07:15:08,689 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 07:15:08,689 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 07:15:08,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-20 07:15:08,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 07:15:08,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 07:15:08,690 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 07:15:08,800 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 07:15:08,802 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 07:15:09,187 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 07:15:09,197 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 07:15:09,197 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-20 07:15:09,199 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:15:09 BoogieIcfgContainer [2021-11-20 07:15:09,199 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 07:15:09,201 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 07:15:09,202 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 07:15:09,205 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 07:15:09,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:15:07" (1/3) ... [2021-11-20 07:15:09,207 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dcf34bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:15:09, skipping insertion in model container [2021-11-20 07:15:09,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:15:08" (2/3) ... [2021-11-20 07:15:09,207 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dcf34bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:15:09, skipping insertion in model container [2021-11-20 07:15:09,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:15:09" (3/3) ... [2021-11-20 07:15:09,209 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2n_append_equal.i [2021-11-20 07:15:09,214 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 07:15:09,215 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 33 error locations. [2021-11-20 07:15:09,264 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 07:15:09,271 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 07:15:09,272 INFO L340 AbstractCegarLoop]: Starting to check reachability of 33 error locations. [2021-11-20 07:15:09,289 INFO L276 IsEmpty]: Start isEmpty. Operand has 85 states, 48 states have (on average 1.9375) internal successors, (93), 81 states have internal predecessors, (93), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:15:09,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-20 07:15:09,298 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:15:09,299 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:15:09,300 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 29 more)] === [2021-11-20 07:15:09,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:15:09,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1813904761, now seen corresponding path program 1 times [2021-11-20 07:15:09,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:15:09,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111608188] [2021-11-20 07:15:09,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:15:09,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:15:09,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:09,608 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 07:15:09,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:15:09,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111608188] [2021-11-20 07:15:09,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111608188] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:15:09,611 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:15:09,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:15:09,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898489959] [2021-11-20 07:15:09,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:15:09,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:15:09,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:15:09,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:15:09,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:15:09,666 INFO L87 Difference]: Start difference. First operand has 85 states, 48 states have (on average 1.9375) internal successors, (93), 81 states have internal predecessors, (93), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 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 07:15:09,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:15:09,757 INFO L93 Difference]: Finished difference Result 83 states and 90 transitions. [2021-11-20 07:15:09,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:15:09,760 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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 07:15:09,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:15:09,768 INFO L225 Difference]: With dead ends: 83 [2021-11-20 07:15:09,768 INFO L226 Difference]: Without dead ends: 80 [2021-11-20 07:15:09,770 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 07:15:09,774 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 8 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:15:09,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 130 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:15:09,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-20 07:15:09,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-11-20 07:15:09,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 46 states have (on average 1.7826086956521738) internal successors, (82), 76 states have internal predecessors, (82), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:15:09,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 86 transitions. [2021-11-20 07:15:09,821 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 86 transitions. Word has length 7 [2021-11-20 07:15:09,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:15:09,822 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 86 transitions. [2021-11-20 07:15:09,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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 07:15:09,822 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 86 transitions. [2021-11-20 07:15:09,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-20 07:15:09,823 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:15:09,823 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:15:09,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 07:15:09,824 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 29 more)] === [2021-11-20 07:15:09,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:15:09,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1813904762, now seen corresponding path program 1 times [2021-11-20 07:15:09,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:15:09,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728902182] [2021-11-20 07:15:09,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:15:09,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:15:09,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:09,889 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 07:15:09,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:15:09,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728902182] [2021-11-20 07:15:09,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728902182] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:15:09,890 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:15:09,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:15:09,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934729128] [2021-11-20 07:15:09,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:15:09,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:15:09,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:15:09,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:15:09,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:15:09,894 INFO L87 Difference]: Start difference. First operand 80 states and 86 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 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 07:15:09,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:15:09,964 INFO L93 Difference]: Finished difference Result 78 states and 84 transitions. [2021-11-20 07:15:09,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:15:09,964 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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 07:15:09,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:15:09,966 INFO L225 Difference]: With dead ends: 78 [2021-11-20 07:15:09,966 INFO L226 Difference]: Without dead ends: 78 [2021-11-20 07:15:09,967 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 07:15:09,969 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 4 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:15:09,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 130 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:15:09,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-20 07:15:09,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-11-20 07:15:09,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 46 states have (on average 1.7391304347826086) internal successors, (80), 74 states have internal predecessors, (80), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:15:09,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 84 transitions. [2021-11-20 07:15:09,985 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 84 transitions. Word has length 7 [2021-11-20 07:15:09,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:15:09,986 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 84 transitions. [2021-11-20 07:15:09,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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 07:15:09,986 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 84 transitions. [2021-11-20 07:15:09,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-20 07:15:09,987 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:15:09,987 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:15:09,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 07:15:09,988 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 29 more)] === [2021-11-20 07:15:09,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:15:09,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1961810752, now seen corresponding path program 1 times [2021-11-20 07:15:09,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:15:09,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117339123] [2021-11-20 07:15:09,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:15:09,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:15:10,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:10,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:15:10,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:10,138 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 07:15:10,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:15:10,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117339123] [2021-11-20 07:15:10,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117339123] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:15:10,140 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:15:10,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 07:15:10,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431077189] [2021-11-20 07:15:10,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:15:10,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:15:10,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:15:10,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:15:10,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:15:10,142 INFO L87 Difference]: Start difference. First operand 78 states and 84 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 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 07:15:10,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:15:10,354 INFO L93 Difference]: Finished difference Result 82 states and 91 transitions. [2021-11-20 07:15:10,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 07:15:10,355 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 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 07:15:10,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:15:10,358 INFO L225 Difference]: With dead ends: 82 [2021-11-20 07:15:10,358 INFO L226 Difference]: Without dead ends: 82 [2021-11-20 07:15:10,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:15:10,360 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 11 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:15:10,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 300 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:15:10,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-20 07:15:10,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 77. [2021-11-20 07:15:10,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 46 states have (on average 1.7173913043478262) internal successors, (79), 73 states have internal predecessors, (79), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:15:10,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 83 transitions. [2021-11-20 07:15:10,381 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 83 transitions. Word has length 13 [2021-11-20 07:15:10,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:15:10,381 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 83 transitions. [2021-11-20 07:15:10,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 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 07:15:10,382 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 83 transitions. [2021-11-20 07:15:10,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-20 07:15:10,383 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:15:10,383 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:15:10,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 07:15:10,384 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 29 more)] === [2021-11-20 07:15:10,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:15:10,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1961810753, now seen corresponding path program 1 times [2021-11-20 07:15:10,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:15:10,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368245501] [2021-11-20 07:15:10,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:15:10,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:15:10,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:10,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:15:10,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:10,595 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 07:15:10,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:15:10,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368245501] [2021-11-20 07:15:10,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368245501] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:15:10,597 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:15:10,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 07:15:10,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957144121] [2021-11-20 07:15:10,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:15:10,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:15:10,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:15:10,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:15:10,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:15:10,605 INFO L87 Difference]: Start difference. First operand 77 states and 83 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 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 07:15:10,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:15:10,823 INFO L93 Difference]: Finished difference Result 81 states and 90 transitions. [2021-11-20 07:15:10,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 07:15:10,823 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 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 07:15:10,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:15:10,825 INFO L225 Difference]: With dead ends: 81 [2021-11-20 07:15:10,825 INFO L226 Difference]: Without dead ends: 81 [2021-11-20 07:15:10,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:15:10,827 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 9 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:15:10,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 316 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:15:10,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-20 07:15:10,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 76. [2021-11-20 07:15:10,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 46 states have (on average 1.6956521739130435) internal successors, (78), 72 states have internal predecessors, (78), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:15:10,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 82 transitions. [2021-11-20 07:15:10,836 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 82 transitions. Word has length 13 [2021-11-20 07:15:10,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:15:10,836 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 82 transitions. [2021-11-20 07:15:10,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 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 07:15:10,837 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2021-11-20 07:15:10,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-20 07:15:10,837 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:15:10,838 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:15:10,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 07:15:10,838 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 29 more)] === [2021-11-20 07:15:10,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:15:10,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1399608384, now seen corresponding path program 1 times [2021-11-20 07:15:10,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:15:10,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744702827] [2021-11-20 07:15:10,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:15:10,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:15:10,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:10,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 07:15:10,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:10,888 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 07:15:10,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:15:10,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744702827] [2021-11-20 07:15:10,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744702827] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:15:10,889 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:15:10,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 07:15:10,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527192227] [2021-11-20 07:15:10,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:15:10,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:15:10,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:15:10,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:15:10,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:15:10,892 INFO L87 Difference]: Start difference. First operand 76 states and 82 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 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 07:15:10,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:15:10,977 INFO L93 Difference]: Finished difference Result 82 states and 89 transitions. [2021-11-20 07:15:10,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:15:10,977 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 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 15 [2021-11-20 07:15:10,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:15:10,979 INFO L225 Difference]: With dead ends: 82 [2021-11-20 07:15:10,979 INFO L226 Difference]: Without dead ends: 82 [2021-11-20 07:15:10,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:15:10,981 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 4 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:15:10,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 192 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:15:10,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-20 07:15:10,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 77. [2021-11-20 07:15:10,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 47 states have (on average 1.6808510638297873) internal successors, (79), 73 states have internal predecessors, (79), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:15:10,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 83 transitions. [2021-11-20 07:15:10,991 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 83 transitions. Word has length 15 [2021-11-20 07:15:10,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:15:10,991 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 83 transitions. [2021-11-20 07:15:10,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 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 07:15:10,992 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 83 transitions. [2021-11-20 07:15:10,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-20 07:15:10,993 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:15:10,993 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 07:15:10,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 07:15:10,993 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 29 more)] === [2021-11-20 07:15:10,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:15:10,994 INFO L85 PathProgramCache]: Analyzing trace with hash -898428094, now seen corresponding path program 1 times [2021-11-20 07:15:10,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:15:10,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334595865] [2021-11-20 07:15:10,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:15:10,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:15:11,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:11,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:15:11,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:11,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-20 07:15:11,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:11,083 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 07:15:11,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:15:11,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334595865] [2021-11-20 07:15:11,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334595865] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:15:11,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400218354] [2021-11-20 07:15:11,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:15:11,084 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:15:11,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:15:11,089 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:15:11,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 07:15:11,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:11,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 07:15:11,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:15:11,290 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:15:11,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:15:11,386 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 07:15:11,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400218354] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:15:11,386 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:15:11,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 6 [2021-11-20 07:15:11,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435334466] [2021-11-20 07:15:11,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:15:11,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 07:15:11,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:15:11,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 07:15:11,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:15:11,389 INFO L87 Difference]: Start difference. First operand 77 states and 83 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-20 07:15:11,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:15:11,496 INFO L93 Difference]: Finished difference Result 83 states and 90 transitions. [2021-11-20 07:15:11,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:15:11,497 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2021-11-20 07:15:11,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:15:11,514 INFO L225 Difference]: With dead ends: 83 [2021-11-20 07:15:11,514 INFO L226 Difference]: Without dead ends: 83 [2021-11-20 07:15:11,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:15:11,516 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 8 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:15:11,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 267 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:15:11,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-20 07:15:11,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-11-20 07:15:11,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 52 states have (on average 1.6153846153846154) internal successors, (84), 78 states have internal predecessors, (84), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:15:11,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 90 transitions. [2021-11-20 07:15:11,537 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 90 transitions. Word has length 28 [2021-11-20 07:15:11,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:15:11,537 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 90 transitions. [2021-11-20 07:15:11,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-20 07:15:11,538 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 90 transitions. [2021-11-20 07:15:11,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-20 07:15:11,539 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:15:11,540 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:15:11,581 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-20 07:15:11,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-20 07:15:11,741 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 29 more)] === [2021-11-20 07:15:11,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:15:11,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1437186176, now seen corresponding path program 2 times [2021-11-20 07:15:11,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:15:11,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435560097] [2021-11-20 07:15:11,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:15:11,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:15:11,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:11,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:15:11,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:12,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 07:15:12,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:12,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-20 07:15:12,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:12,116 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 07:15:12,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:15:12,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435560097] [2021-11-20 07:15:12,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435560097] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:15:12,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363696255] [2021-11-20 07:15:12,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:15:12,118 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:15:12,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:15:12,119 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:15:12,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 07:15:12,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:15:12,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:15:12,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-20 07:15:12,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:15:12,258 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 07:15:12,288 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 11 treesize of output 9 [2021-11-20 07:15:12,476 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:15:12,476 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 07:15:12,637 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 07:15:12,637 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 19 treesize of output 15 [2021-11-20 07:15:12,758 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-20 07:15:12,759 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 07:15:13,064 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-20 07:15:13,065 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 22 treesize of output 27 [2021-11-20 07:15:13,111 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 07:15:13,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:15:21,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363696255] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:15:21,440 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:15:21,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-11-20 07:15:21,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279308409] [2021-11-20 07:15:21,440 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:15:21,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-20 07:15:21,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:15:21,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-20 07:15:21,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=246, Unknown=2, NotChecked=0, Total=306 [2021-11-20 07:15:21,442 INFO L87 Difference]: Start difference. First operand 83 states and 90 transitions. Second operand has 16 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 4 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 07:15:21,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:15:21,708 INFO L93 Difference]: Finished difference Result 93 states and 101 transitions. [2021-11-20 07:15:21,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 07:15:21,709 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 4 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 41 [2021-11-20 07:15:21,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:15:21,710 INFO L225 Difference]: With dead ends: 93 [2021-11-20 07:15:21,710 INFO L226 Difference]: Without dead ends: 93 [2021-11-20 07:15:21,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 54 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=80, Invalid=338, Unknown=2, NotChecked=0, Total=420 [2021-11-20 07:15:21,712 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 81 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:15:21,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 420 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 196 Invalid, 0 Unknown, 82 Unchecked, 0.2s Time] [2021-11-20 07:15:21,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-11-20 07:15:21,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 81. [2021-11-20 07:15:21,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 52 states have (on average 1.5769230769230769) internal successors, (82), 76 states have internal predecessors, (82), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:15:21,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 88 transitions. [2021-11-20 07:15:21,720 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 88 transitions. Word has length 41 [2021-11-20 07:15:21,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:15:21,721 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 88 transitions. [2021-11-20 07:15:21,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 4 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 07:15:21,721 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 88 transitions. [2021-11-20 07:15:21,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-20 07:15:21,723 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:15:21,723 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:15:21,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 07:15:21,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:15:21,950 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 29 more)] === [2021-11-20 07:15:21,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:15:21,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1437186175, now seen corresponding path program 1 times [2021-11-20 07:15:21,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:15:21,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969918488] [2021-11-20 07:15:21,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:15:21,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:15:21,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:22,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:15:22,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:22,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 07:15:22,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:22,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-20 07:15:22,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:22,273 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-20 07:15:22,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:15:22,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969918488] [2021-11-20 07:15:22,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969918488] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:15:22,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263762155] [2021-11-20 07:15:22,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:15:22,278 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:15:22,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:15:22,279 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:15:22,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 07:15:22,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:22,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-20 07:15:22,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:15:22,379 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 07:15:22,406 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 11 treesize of output 9 [2021-11-20 07:15:22,520 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:15:22,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 07:15:22,693 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 07:15:22,693 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 19 treesize of output 15 [2021-11-20 07:15:22,806 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-20 07:15:22,806 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 07:15:23,042 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 07:15:23,043 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 19 treesize of output 15 [2021-11-20 07:15:23,131 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-20 07:15:23,132 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 07:15:23,201 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-20 07:15:23,201 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:15:23,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263762155] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:15:23,202 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:15:23,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2021-11-20 07:15:23,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982967501] [2021-11-20 07:15:23,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:15:23,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 07:15:23,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:15:23,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 07:15:23,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-11-20 07:15:23,203 INFO L87 Difference]: Start difference. First operand 81 states and 88 transitions. Second operand has 8 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:15:23,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:15:23,260 INFO L93 Difference]: Finished difference Result 80 states and 87 transitions. [2021-11-20 07:15:23,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 07:15:23,260 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 41 [2021-11-20 07:15:23,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:15:23,261 INFO L225 Difference]: With dead ends: 80 [2021-11-20 07:15:23,262 INFO L226 Difference]: Without dead ends: 80 [2021-11-20 07:15:23,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-11-20 07:15:23,263 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 5 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:15:23,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 328 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 124 Unchecked, 0.1s Time] [2021-11-20 07:15:23,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-20 07:15:23,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-11-20 07:15:23,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 52 states have (on average 1.5576923076923077) internal successors, (81), 75 states have internal predecessors, (81), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:15:23,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 87 transitions. [2021-11-20 07:15:23,269 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 87 transitions. Word has length 41 [2021-11-20 07:15:23,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:15:23,270 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 87 transitions. [2021-11-20 07:15:23,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:15:23,270 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 87 transitions. [2021-11-20 07:15:23,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-20 07:15:23,271 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:15:23,272 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:15:23,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 07:15:23,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:15:23,472 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 29 more)] === [2021-11-20 07:15:23,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:15:23,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1843554241, now seen corresponding path program 1 times [2021-11-20 07:15:23,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:15:23,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776299586] [2021-11-20 07:15:23,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:15:23,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:15:23,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:23,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:15:23,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:23,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 07:15:23,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:23,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-20 07:15:23,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:23,550 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-20 07:15:23,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:15:23,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776299586] [2021-11-20 07:15:23,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776299586] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:15:23,551 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:15:23,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:15:23,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565109513] [2021-11-20 07:15:23,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:15:23,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:15:23,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:15:23,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:15:23,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:15:23,553 INFO L87 Difference]: Start difference. First operand 80 states and 87 transitions. Second operand has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 07:15:23,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:15:23,635 INFO L93 Difference]: Finished difference Result 90 states and 98 transitions. [2021-11-20 07:15:23,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:15:23,636 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 43 [2021-11-20 07:15:23,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:15:23,637 INFO L225 Difference]: With dead ends: 90 [2021-11-20 07:15:23,637 INFO L226 Difference]: Without dead ends: 90 [2021-11-20 07:15:23,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:15:23,638 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 51 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:15:23,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 112 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:15:23,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-20 07:15:23,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 78. [2021-11-20 07:15:23,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 52 states have (on average 1.5192307692307692) internal successors, (79), 73 states have internal predecessors, (79), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:15:23,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 85 transitions. [2021-11-20 07:15:23,644 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 85 transitions. Word has length 43 [2021-11-20 07:15:23,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:15:23,644 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 85 transitions. [2021-11-20 07:15:23,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 07:15:23,645 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 85 transitions. [2021-11-20 07:15:23,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-20 07:15:23,645 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:15:23,645 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:15:23,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-20 07:15:23,646 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 29 more)] === [2021-11-20 07:15:23,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:15:23,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1843554242, now seen corresponding path program 1 times [2021-11-20 07:15:23,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:15:23,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048158969] [2021-11-20 07:15:23,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:15:23,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:15:23,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:23,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:15:23,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:23,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 07:15:23,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:23,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-20 07:15:23,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:23,730 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-20 07:15:23,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:15:23,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048158969] [2021-11-20 07:15:23,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048158969] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:15:23,731 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:15:23,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 07:15:23,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263385001] [2021-11-20 07:15:23,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:15:23,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 07:15:23,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:15:23,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 07:15:23,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:15:23,733 INFO L87 Difference]: Start difference. First operand 78 states and 85 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:15:23,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:15:23,819 INFO L93 Difference]: Finished difference Result 76 states and 83 transitions. [2021-11-20 07:15:23,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 07:15:23,819 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 43 [2021-11-20 07:15:23,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:15:23,820 INFO L225 Difference]: With dead ends: 76 [2021-11-20 07:15:23,820 INFO L226 Difference]: Without dead ends: 76 [2021-11-20 07:15:23,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:15:23,821 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 160 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:15:23,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 117 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:15:23,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-20 07:15:23,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-11-20 07:15:23,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 52 states have (on average 1.4807692307692308) internal successors, (77), 71 states have internal predecessors, (77), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:15:23,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 83 transitions. [2021-11-20 07:15:23,835 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 83 transitions. Word has length 43 [2021-11-20 07:15:23,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:15:23,837 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 83 transitions. [2021-11-20 07:15:23,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:15:23,837 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 83 transitions. [2021-11-20 07:15:23,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-20 07:15:23,838 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:15:23,838 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:15:23,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-20 07:15:23,839 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 29 more)] === [2021-11-20 07:15:23,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:15:23,840 INFO L85 PathProgramCache]: Analyzing trace with hash 2129100770, now seen corresponding path program 1 times [2021-11-20 07:15:23,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:15:23,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916313138] [2021-11-20 07:15:23,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:15:23,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:15:23,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:23,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:15:23,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:23,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 07:15:23,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:23,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-20 07:15:23,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:23,981 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-20 07:15:23,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:15:23,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916313138] [2021-11-20 07:15:23,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916313138] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:15:23,981 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:15:23,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 07:15:23,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569407026] [2021-11-20 07:15:23,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:15:23,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 07:15:23,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:15:23,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 07:15:23,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:15:23,983 INFO L87 Difference]: Start difference. First operand 76 states and 83 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:15:24,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:15:24,074 INFO L93 Difference]: Finished difference Result 87 states and 95 transitions. [2021-11-20 07:15:24,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 07:15:24,074 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2021-11-20 07:15:24,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:15:24,075 INFO L225 Difference]: With dead ends: 87 [2021-11-20 07:15:24,075 INFO L226 Difference]: Without dead ends: 87 [2021-11-20 07:15:24,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:15:24,076 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 64 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:15:24,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 146 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:15:24,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-20 07:15:24,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 75. [2021-11-20 07:15:24,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 52 states have (on average 1.4615384615384615) internal successors, (76), 70 states have internal predecessors, (76), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:15:24,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 82 transitions. [2021-11-20 07:15:24,081 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 82 transitions. Word has length 45 [2021-11-20 07:15:24,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:15:24,082 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 82 transitions. [2021-11-20 07:15:24,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:15:24,082 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 82 transitions. [2021-11-20 07:15:24,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-20 07:15:24,083 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:15:24,083 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:15:24,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-20 07:15:24,083 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 29 more)] === [2021-11-20 07:15:24,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:15:24,084 INFO L85 PathProgramCache]: Analyzing trace with hash 2129100771, now seen corresponding path program 1 times [2021-11-20 07:15:24,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:15:24,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994241257] [2021-11-20 07:15:24,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:15:24,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:15:24,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:24,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:15:24,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:24,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 07:15:24,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:24,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-20 07:15:24,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:24,233 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-20 07:15:24,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:15:24,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994241257] [2021-11-20 07:15:24,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994241257] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:15:24,234 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:15:24,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 07:15:24,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893694892] [2021-11-20 07:15:24,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:15:24,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 07:15:24,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:15:24,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 07:15:24,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:15:24,235 INFO L87 Difference]: Start difference. First operand 75 states and 82 transitions. Second operand has 8 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:15:24,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:15:24,334 INFO L93 Difference]: Finished difference Result 73 states and 80 transitions. [2021-11-20 07:15:24,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 07:15:24,335 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2021-11-20 07:15:24,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:15:24,336 INFO L225 Difference]: With dead ends: 73 [2021-11-20 07:15:24,336 INFO L226 Difference]: Without dead ends: 73 [2021-11-20 07:15:24,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:15:24,337 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 152 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:15:24,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 119 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:15:24,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-20 07:15:24,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-11-20 07:15:24,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 52 states have (on average 1.4230769230769231) internal successors, (74), 68 states have internal predecessors, (74), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:15:24,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 80 transitions. [2021-11-20 07:15:24,340 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 80 transitions. Word has length 45 [2021-11-20 07:15:24,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:15:24,341 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 80 transitions. [2021-11-20 07:15:24,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:15:24,341 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 80 transitions. [2021-11-20 07:15:24,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-20 07:15:24,341 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:15:24,342 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:15:24,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-20 07:15:24,342 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 29 more)] === [2021-11-20 07:15:24,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:15:24,342 INFO L85 PathProgramCache]: Analyzing trace with hash 2129253767, now seen corresponding path program 1 times [2021-11-20 07:15:24,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:15:24,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135067040] [2021-11-20 07:15:24,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:15:24,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:15:24,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:24,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:15:24,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:24,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 07:15:24,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:24,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-20 07:15:24,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:25,072 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 07:15:25,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:15:25,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135067040] [2021-11-20 07:15:25,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135067040] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:15:25,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489665892] [2021-11-20 07:15:25,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:15:25,072 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:15:25,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:15:25,074 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:15:25,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 07:15:25,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:25,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 66 conjunts are in the unsatisfiable core [2021-11-20 07:15:25,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:15:25,269 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 07:15:25,273 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 07:15:25,805 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 36 treesize of output 28 [2021-11-20 07:15:25,810 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 18 treesize of output 10 [2021-11-20 07:15:28,111 WARN L860 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.offset| Int) (|node_create_~temp~0#1.base| Int)) (let ((.cse0 (+ |node_create_~temp~0#1.offset| 4))) (and (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| (store (store (select |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base|) .cse0 0) |node_create_~temp~0#1.offset| (select (select |c_#memory_$Pointer$.base| |node_create_~temp~0#1.base|) |node_create_~temp~0#1.offset|)))) (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |node_create_~temp~0#1.base| (store (store (select |c_old(#memory_$Pointer$.offset)| |node_create_~temp~0#1.base|) .cse0 0) |node_create_~temp~0#1.offset| (select (select |c_#memory_$Pointer$.offset| |node_create_~temp~0#1.base|) |node_create_~temp~0#1.offset|)))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)) (= (store |c_old(#length)| |node_create_~temp~0#1.base| 8) |c_#length|)))) is different from true [2021-11-20 07:15:28,324 INFO L354 Elim1Store]: treesize reduction 88, result has 16.2 percent of original size [2021-11-20 07:15:28,324 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 2 case distinctions, treesize of input 89 treesize of output 77 [2021-11-20 07:15:28,350 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-20 07:15:28,351 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 78 treesize of output 78 [2021-11-20 07:15:28,424 INFO L354 Elim1Store]: treesize reduction 88, result has 16.2 percent of original size [2021-11-20 07:15:28,425 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 2 case distinctions, treesize of input 72 treesize of output 60 [2021-11-20 07:15:28,456 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 07:15:28,456 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 61 treesize of output 63 [2021-11-20 07:15:28,924 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-20 07:15:28,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 56 [2021-11-20 07:15:28,935 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-20 07:15:28,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 32 [2021-11-20 07:15:29,205 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 3 not checked. [2021-11-20 07:15:29,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:15:32,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489665892] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:15:32,007 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:15:32,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2021-11-20 07:15:32,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442879070] [2021-11-20 07:15:32,007 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:15:32,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-20 07:15:32,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:15:32,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-20 07:15:32,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1015, Unknown=2, NotChecked=64, Total=1190 [2021-11-20 07:15:32,009 INFO L87 Difference]: Start difference. First operand 73 states and 80 transitions. Second operand has 31 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 07:15:42,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:15:42,558 INFO L93 Difference]: Finished difference Result 74 states and 82 transitions. [2021-11-20 07:15:42,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 07:15:42,558 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 45 [2021-11-20 07:15:42,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:15:42,559 INFO L225 Difference]: With dead ends: 74 [2021-11-20 07:15:42,559 INFO L226 Difference]: Without dead ends: 74 [2021-11-20 07:15:42,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=170, Invalid=1470, Unknown=4, NotChecked=78, Total=1722 [2021-11-20 07:15:42,561 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 14 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:15:42,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 640 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 536 Invalid, 0 Unknown, 74 Unchecked, 1.2s Time] [2021-11-20 07:15:42,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-20 07:15:42,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-11-20 07:15:42,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 53 states have (on average 1.4339622641509433) internal successors, (76), 69 states have internal predecessors, (76), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:15:42,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 82 transitions. [2021-11-20 07:15:42,565 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 82 transitions. Word has length 45 [2021-11-20 07:15:42,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:15:42,566 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 82 transitions. [2021-11-20 07:15:42,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 07:15:42,566 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 82 transitions. [2021-11-20 07:15:42,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-20 07:15:42,567 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:15:42,567 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:15:42,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 07:15:42,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:15:42,790 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 29 more)] === [2021-11-20 07:15:42,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:15:42,790 INFO L85 PathProgramCache]: Analyzing trace with hash 2129253766, now seen corresponding path program 1 times [2021-11-20 07:15:42,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:15:42,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837422910] [2021-11-20 07:15:42,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:15:42,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:15:42,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:43,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:15:43,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:43,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 07:15:43,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:43,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-20 07:15:43,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:43,840 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 07:15:43,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:15:43,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837422910] [2021-11-20 07:15:43,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837422910] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:15:43,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486697198] [2021-11-20 07:15:43,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:15:43,840 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:15:43,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:15:43,841 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:15:43,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 07:15:43,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:43,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-20 07:15:43,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:15:44,108 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 07:15:44,765 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 13 treesize of output 9 [2021-11-20 07:15:49,523 INFO L354 Elim1Store]: treesize reduction 88, result has 16.2 percent of original size [2021-11-20 07:15:49,523 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 2 case distinctions, treesize of input 41 treesize of output 33 [2021-11-20 07:15:49,553 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 07:15:49,553 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 07:15:49,853 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-20 07:15:49,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-11-20 07:15:49,896 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 23 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 07:15:49,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:15:52,099 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_node_create_~temp~0#1.offset_27| Int) (v_DerPreprocessor_3 Int) (|v_node_create_~temp~0#1.base_32| Int)) (or (<= |c_#StackHeapBarrier| |v_node_create_~temp~0#1.base_32|) (= (select (store |c_#valid| |v_node_create_~temp~0#1.base_32| 1) (select (select (store |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_32| (store (store (select |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_32|) (+ |v_node_create_~temp~0#1.offset_27| 4) 0) |v_node_create_~temp~0#1.offset_27| v_DerPreprocessor_3)) |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|)) 1))) is different from false [2021-11-20 07:15:52,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486697198] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:15:52,102 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:15:52,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 27 [2021-11-20 07:15:52,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444505955] [2021-11-20 07:15:52,102 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:15:52,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-20 07:15:52,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:15:52,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-20 07:15:52,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=673, Unknown=3, NotChecked=52, Total=812 [2021-11-20 07:15:52,104 INFO L87 Difference]: Start difference. First operand 74 states and 82 transitions. Second operand has 28 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 07:16:07,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:16:07,345 INFO L93 Difference]: Finished difference Result 101 states and 111 transitions. [2021-11-20 07:16:07,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 07:16:07,355 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 45 [2021-11-20 07:16:07,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:16:07,356 INFO L225 Difference]: With dead ends: 101 [2021-11-20 07:16:07,357 INFO L226 Difference]: Without dead ends: 101 [2021-11-20 07:16:07,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 21.7s TimeCoverageRelationStatistics Valid=142, Invalid=1045, Unknown=7, NotChecked=66, Total=1260 [2021-11-20 07:16:07,359 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 61 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 648 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:16:07,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 648 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 456 Invalid, 0 Unknown, 42 Unchecked, 1.3s Time] [2021-11-20 07:16:07,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-11-20 07:16:07,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 72. [2021-11-20 07:16:07,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 53 states have (on average 1.3773584905660377) internal successors, (73), 67 states have internal predecessors, (73), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:16:07,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 79 transitions. [2021-11-20 07:16:07,366 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 79 transitions. Word has length 45 [2021-11-20 07:16:07,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:16:07,367 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 79 transitions. [2021-11-20 07:16:07,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 07:16:07,367 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 79 transitions. [2021-11-20 07:16:07,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-20 07:16:07,368 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:16:07,369 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:16:07,405 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-20 07:16:07,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:16:07,586 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 29 more)] === [2021-11-20 07:16:07,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:16:07,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1808436913, now seen corresponding path program 1 times [2021-11-20 07:16:07,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:16:07,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112714857] [2021-11-20 07:16:07,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:16:07,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:16:07,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:16:07,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:16:07,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:16:07,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 07:16:07,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:16:07,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-20 07:16:07,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:16:07,757 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-20 07:16:07,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:16:07,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112714857] [2021-11-20 07:16:07,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112714857] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:16:07,758 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:16:07,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:16:07,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661697164] [2021-11-20 07:16:07,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:16:07,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:16:07,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:16:07,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:16:07,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:16:07,760 INFO L87 Difference]: Start difference. First operand 72 states and 79 transitions. Second operand has 4 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 07:16:08,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:16:08,053 INFO L93 Difference]: Finished difference Result 101 states and 110 transitions. [2021-11-20 07:16:08,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:16:08,055 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 47 [2021-11-20 07:16:08,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:16:08,056 INFO L225 Difference]: With dead ends: 101 [2021-11-20 07:16:08,056 INFO L226 Difference]: Without dead ends: 101 [2021-11-20 07:16:08,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:16:08,057 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 36 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:16:08,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 185 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 07:16:08,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-11-20 07:16:08,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 70. [2021-11-20 07:16:08,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 53 states have (on average 1.3396226415094339) internal successors, (71), 65 states have internal predecessors, (71), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:16:08,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 77 transitions. [2021-11-20 07:16:08,063 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 77 transitions. Word has length 47 [2021-11-20 07:16:08,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:16:08,063 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 77 transitions. [2021-11-20 07:16:08,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 07:16:08,063 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 77 transitions. [2021-11-20 07:16:08,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-20 07:16:08,064 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:16:08,065 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 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 07:16:08,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-20 07:16:08,065 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 29 more)] === [2021-11-20 07:16:08,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:16:08,065 INFO L85 PathProgramCache]: Analyzing trace with hash -35949242, now seen corresponding path program 1 times [2021-11-20 07:16:08,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:16:08,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100781471] [2021-11-20 07:16:08,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:16:08,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:16:08,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:16:08,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:16:08,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:16:08,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 07:16:08,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:16:08,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-20 07:16:08,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:16:08,553 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-20 07:16:08,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:16:08,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100781471] [2021-11-20 07:16:08,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100781471] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:16:08,554 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:16:08,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-20 07:16:08,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352657059] [2021-11-20 07:16:08,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:16:08,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 07:16:08,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:16:08,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 07:16:08,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-11-20 07:16:08,557 INFO L87 Difference]: Start difference. First operand 70 states and 77 transitions. Second operand has 11 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 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 07:16:09,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:16:09,649 INFO L93 Difference]: Finished difference Result 131 states and 143 transitions. [2021-11-20 07:16:09,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 07:16:09,650 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 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 48 [2021-11-20 07:16:09,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:16:09,652 INFO L225 Difference]: With dead ends: 131 [2021-11-20 07:16:09,653 INFO L226 Difference]: Without dead ends: 131 [2021-11-20 07:16:09,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-11-20 07:16:09,654 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 228 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 07:16:09,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 287 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-20 07:16:09,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-11-20 07:16:09,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 74. [2021-11-20 07:16:09,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 58 states have (on average 1.3275862068965518) internal successors, (77), 69 states have internal predecessors, (77), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:16:09,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2021-11-20 07:16:09,662 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 48 [2021-11-20 07:16:09,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:16:09,662 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2021-11-20 07:16:09,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 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 07:16:09,663 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2021-11-20 07:16:09,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-20 07:16:09,664 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:16:09,664 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 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 07:16:09,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-20 07:16:09,665 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 29 more)] === [2021-11-20 07:16:09,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:16:09,666 INFO L85 PathProgramCache]: Analyzing trace with hash -35949241, now seen corresponding path program 1 times [2021-11-20 07:16:09,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:16:09,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012873967] [2021-11-20 07:16:09,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:16:09,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:16:09,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:16:10,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:16:10,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:16:10,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 07:16:10,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:16:10,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-20 07:16:10,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:16:10,400 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-20 07:16:10,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:16:10,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012873967] [2021-11-20 07:16:10,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012873967] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:16:10,401 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:16:10,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-20 07:16:10,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066819366] [2021-11-20 07:16:10,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:16:10,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 07:16:10,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:16:10,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 07:16:10,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-11-20 07:16:10,403 INFO L87 Difference]: Start difference. First operand 74 states and 83 transitions. Second operand has 11 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 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 07:16:11,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:16:11,492 INFO L93 Difference]: Finished difference Result 121 states and 133 transitions. [2021-11-20 07:16:11,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 07:16:11,493 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 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 48 [2021-11-20 07:16:11,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:16:11,495 INFO L225 Difference]: With dead ends: 121 [2021-11-20 07:16:11,496 INFO L226 Difference]: Without dead ends: 121 [2021-11-20 07:16:11,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-20 07:16:11,497 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 147 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 07:16:11,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 333 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-20 07:16:11,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-11-20 07:16:11,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 76. [2021-11-20 07:16:11,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 60 states have (on average 1.3) internal successors, (78), 71 states have internal predecessors, (78), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:16:11,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 84 transitions. [2021-11-20 07:16:11,505 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 84 transitions. Word has length 48 [2021-11-20 07:16:11,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:16:11,505 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 84 transitions. [2021-11-20 07:16:11,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 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 07:16:11,506 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 84 transitions. [2021-11-20 07:16:11,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-20 07:16:11,507 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:16:11,507 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:16:11,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-20 07:16:11,508 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 29 more)] === [2021-11-20 07:16:11,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:16:11,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1114427801, now seen corresponding path program 1 times [2021-11-20 07:16:11,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:16:11,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507336953] [2021-11-20 07:16:11,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:16:11,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:16:11,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:16:11,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:16:11,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:16:11,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 07:16:11,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:16:11,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-20 07:16:11,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:16:11,999 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-20 07:16:12,000 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:16:12,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507336953] [2021-11-20 07:16:12,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507336953] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:16:12,000 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:16:12,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-20 07:16:12,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776497446] [2021-11-20 07:16:12,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:16:12,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 07:16:12,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:16:12,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 07:16:12,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-11-20 07:16:12,002 INFO L87 Difference]: Start difference. First operand 76 states and 84 transitions. Second operand has 11 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 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 07:16:12,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:16:12,723 INFO L93 Difference]: Finished difference Result 104 states and 114 transitions. [2021-11-20 07:16:12,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 07:16:12,723 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 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 49 [2021-11-20 07:16:12,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:16:12,725 INFO L225 Difference]: With dead ends: 104 [2021-11-20 07:16:12,725 INFO L226 Difference]: Without dead ends: 104 [2021-11-20 07:16:12,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-20 07:16:12,726 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 147 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:16:12,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 483 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 07:16:12,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-20 07:16:12,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 76. [2021-11-20 07:16:12,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 60 states have (on average 1.2833333333333334) internal successors, (77), 71 states have internal predecessors, (77), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:16:12,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 83 transitions. [2021-11-20 07:16:12,731 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 83 transitions. Word has length 49 [2021-11-20 07:16:12,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:16:12,731 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 83 transitions. [2021-11-20 07:16:12,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 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 07:16:12,731 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 83 transitions. [2021-11-20 07:16:12,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-20 07:16:12,732 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:16:12,732 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:16:12,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-20 07:16:12,732 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 29 more)] === [2021-11-20 07:16:12,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:16:12,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1553828739, now seen corresponding path program 1 times [2021-11-20 07:16:12,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:16:12,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581853245] [2021-11-20 07:16:12,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:16:12,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:16:12,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:16:14,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:16:14,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:16:14,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 07:16:14,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:16:14,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-20 07:16:14,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:16:15,976 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 07:16:15,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:16:15,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581853245] [2021-11-20 07:16:15,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581853245] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:16:15,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741445785] [2021-11-20 07:16:15,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:16:15,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:16:15,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:16:15,987 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:16:15,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 07:16:16,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:16:16,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 96 conjunts are in the unsatisfiable core [2021-11-20 07:16:16,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:16:17,449 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 07:16:17,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-20 07:16:17,484 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 14 treesize of output 16 [2021-11-20 07:16:17,984 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 48 treesize of output 44 [2021-11-20 07:16:17,993 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 47 treesize of output 43 [2021-11-20 07:16:19,226 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:16:19,227 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 53 [2021-11-20 07:16:19,237 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:16:19,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 38 [2021-11-20 07:16:40,890 INFO L354 Elim1Store]: treesize reduction 150, result has 13.8 percent of original size [2021-11-20 07:16:40,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 147 treesize of output 109 [2021-11-20 07:16:41,002 INFO L354 Elim1Store]: treesize reduction 178, result has 13.6 percent of original size [2021-11-20 07:16:41,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 136 treesize of output 123 [2021-11-20 07:16:41,084 INFO L354 Elim1Store]: treesize reduction 84, result has 21.5 percent of original size [2021-11-20 07:16:41,085 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 125 treesize of output 130 [2021-11-20 07:16:41,146 INFO L354 Elim1Store]: treesize reduction 28, result has 42.9 percent of original size [2021-11-20 07:16:41,146 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 124 treesize of output 126 [2021-11-20 07:16:43,506 INFO L354 Elim1Store]: treesize reduction 78, result has 3.7 percent of original size [2021-11-20 07:16:43,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 151 treesize of output 89 [2021-11-20 07:16:43,556 INFO L354 Elim1Store]: treesize reduction 60, result has 4.8 percent of original size [2021-11-20 07:16:43,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 77 treesize of output 57 [2021-11-20 07:16:44,192 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:16:44,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:16:50,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741445785] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:16:50,552 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:16:50,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 22] total 48 [2021-11-20 07:16:50,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836136971] [2021-11-20 07:16:50,553 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:16:50,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-20 07:16:50,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:16:50,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-20 07:16:50,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=2781, Unknown=10, NotChecked=0, Total=2970 [2021-11-20 07:16:50,556 INFO L87 Difference]: Start difference. First operand 76 states and 83 transitions. Second operand has 49 states, 46 states have (on average 1.8478260869565217) internal successors, (85), 43 states have internal predecessors, (85), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 07:17:11,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:17:11,342 INFO L93 Difference]: Finished difference Result 81 states and 91 transitions. [2021-11-20 07:17:11,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-20 07:17:11,343 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 46 states have (on average 1.8478260869565217) internal successors, (85), 43 states have internal predecessors, (85), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 49 [2021-11-20 07:17:11,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:17:11,345 INFO L225 Difference]: With dead ends: 81 [2021-11-20 07:17:11,345 INFO L226 Difference]: Without dead ends: 81 [2021-11-20 07:17:11,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1296 ImplicationChecksByTransitivity, 51.8s TimeCoverageRelationStatistics Valid=389, Invalid=5147, Unknown=14, NotChecked=0, Total=5550 [2021-11-20 07:17:11,349 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 54 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 753 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 150 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:17:11,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 753 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 478 Invalid, 0 Unknown, 150 Unchecked, 1.5s Time] [2021-11-20 07:17:11,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-20 07:17:11,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2021-11-20 07:17:11,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 64 states have (on average 1.296875) internal successors, (83), 75 states have internal predecessors, (83), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:17:11,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2021-11-20 07:17:11,356 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 49 [2021-11-20 07:17:11,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:17:11,357 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2021-11-20 07:17:11,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 46 states have (on average 1.8478260869565217) internal successors, (85), 43 states have internal predecessors, (85), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 07:17:11,357 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2021-11-20 07:17:11,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-20 07:17:11,358 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:17:11,358 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:17:11,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 07:17:11,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:17:11,570 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 29 more)] === [2021-11-20 07:17:11,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:17:11,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1553828740, now seen corresponding path program 1 times [2021-11-20 07:17:11,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:17:11,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964256435] [2021-11-20 07:17:11,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:17:11,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:17:11,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:17:13,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:17:13,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:17:13,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 07:17:13,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:17:13,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-20 07:17:13,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:17:15,264 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 07:17:15,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:17:15,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964256435] [2021-11-20 07:17:15,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964256435] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:17:15,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087527865] [2021-11-20 07:17:15,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:17:15,266 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:17:15,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:17:15,267 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:17:15,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 07:17:15,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:17:15,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 82 conjunts are in the unsatisfiable core [2021-11-20 07:17:15,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:17:16,749 INFO L354 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2021-11-20 07:17:16,750 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 19 treesize of output 16 [2021-11-20 07:17:17,283 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 23 treesize of output 19 [2021-11-20 07:17:18,541 INFO L354 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2021-11-20 07:17:18,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 35 [2021-11-20 07:17:18,557 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 18 treesize of output 10 [2021-11-20 07:17:40,738 INFO L354 Elim1Store]: treesize reduction 210, result has 12.5 percent of original size [2021-11-20 07:17:40,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 121 treesize of output 97 [2021-11-20 07:17:40,820 INFO L354 Elim1Store]: treesize reduction 88, result has 16.2 percent of original size [2021-11-20 07:17:40,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 90 [2021-11-20 07:17:40,932 INFO L354 Elim1Store]: treesize reduction 116, result has 32.2 percent of original size [2021-11-20 07:17:40,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 99 treesize of output 128 [2021-11-20 07:17:41,603 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-20 07:17:41,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 103 [2021-11-20 07:17:42,824 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-20 07:17:42,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 103 treesize of output 48 [2021-11-20 07:17:43,384 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:17:43,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:17:44,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087527865] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:17:44,433 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:17:44,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 22] total 45 [2021-11-20 07:17:44,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141635518] [2021-11-20 07:17:44,433 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:17:44,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-20 07:17:44,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:17:44,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-20 07:17:44,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=2261, Unknown=8, NotChecked=0, Total=2450 [2021-11-20 07:17:44,436 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand has 46 states, 43 states have (on average 1.930232558139535) internal successors, (83), 40 states have internal predecessors, (83), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 07:17:55,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:17:55,981 INFO L93 Difference]: Finished difference Result 82 states and 91 transitions. [2021-11-20 07:17:55,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-20 07:17:55,982 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 43 states have (on average 1.930232558139535) internal successors, (83), 40 states have internal predecessors, (83), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 49 [2021-11-20 07:17:55,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:17:55,983 INFO L225 Difference]: With dead ends: 82 [2021-11-20 07:17:55,983 INFO L226 Difference]: Without dead ends: 82 [2021-11-20 07:17:55,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 963 ImplicationChecksByTransitivity, 37.8s TimeCoverageRelationStatistics Valid=295, Invalid=3233, Unknown=12, NotChecked=0, Total=3540 [2021-11-20 07:17:55,986 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 39 mSDsluCounter, 830 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 882 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-20 07:17:55,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 882 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 697 Invalid, 0 Unknown, 41 Unchecked, 1.7s Time] [2021-11-20 07:17:55,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-20 07:17:55,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2021-11-20 07:17:55,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 64 states have (on average 1.28125) internal successors, (82), 75 states have internal predecessors, (82), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:17:55,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2021-11-20 07:17:55,991 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 49 [2021-11-20 07:17:55,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:17:55,992 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2021-11-20 07:17:55,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 43 states have (on average 1.930232558139535) internal successors, (83), 40 states have internal predecessors, (83), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 07:17:55,992 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2021-11-20 07:17:55,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-20 07:17:55,993 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:17:55,993 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:17:56,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 07:17:56,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:17:56,214 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 29 more)] === [2021-11-20 07:17:56,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:17:56,214 INFO L85 PathProgramCache]: Analyzing trace with hash 218878957, now seen corresponding path program 1 times [2021-11-20 07:17:56,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:17:56,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402203696] [2021-11-20 07:17:56,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:17:56,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:17:56,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:17:56,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:17:56,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:17:56,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 07:17:56,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:17:56,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-20 07:17:56,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:17:57,094 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 07:17:57,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:17:57,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402203696] [2021-11-20 07:17:57,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402203696] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:17:57,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657613174] [2021-11-20 07:17:57,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:17:57,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:17:57,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:17:57,096 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:17:57,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 07:17:57,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:17:57,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-20 07:17:57,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:17:57,693 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 07:17:57,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 07:17:58,505 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 44 treesize of output 40 [2021-11-20 07:17:58,534 INFO L354 Elim1Store]: treesize reduction 33, result has 25.0 percent of original size [2021-11-20 07:17:58,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 33 [2021-11-20 07:17:58,708 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 37 treesize of output 21 [2021-11-20 07:17:58,971 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 13 treesize of output 9 [2021-11-20 07:17:59,146 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-20 07:17:59,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 16 [2021-11-20 07:17:59,269 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-20 07:17:59,269 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:17:59,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657613174] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:17:59,270 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:17:59,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [16] total 28 [2021-11-20 07:17:59,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137469453] [2021-11-20 07:17:59,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:17:59,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 07:17:59,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:17:59,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 07:17:59,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2021-11-20 07:17:59,274 INFO L87 Difference]: Start difference. First operand 80 states and 88 transitions. Second operand has 14 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 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 07:18:01,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:18:01,533 INFO L93 Difference]: Finished difference Result 106 states and 117 transitions. [2021-11-20 07:18:01,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 07:18:01,534 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 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 52 [2021-11-20 07:18:01,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:18:01,535 INFO L225 Difference]: With dead ends: 106 [2021-11-20 07:18:01,535 INFO L226 Difference]: Without dead ends: 106 [2021-11-20 07:18:01,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=142, Invalid=1190, Unknown=0, NotChecked=0, Total=1332 [2021-11-20 07:18:01,537 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 181 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:18:01,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 498 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-20 07:18:01,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-11-20 07:18:01,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 81. [2021-11-20 07:18:01,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 65 states have (on average 1.2769230769230768) internal successors, (83), 76 states have internal predecessors, (83), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:18:01,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 89 transitions. [2021-11-20 07:18:01,542 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 89 transitions. Word has length 52 [2021-11-20 07:18:01,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:18:01,542 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 89 transitions. [2021-11-20 07:18:01,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 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 07:18:01,542 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 89 transitions. [2021-11-20 07:18:01,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-20 07:18:01,543 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:18:01,544 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:18:01,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 07:18:01,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:18:01,766 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 29 more)] === [2021-11-20 07:18:01,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:18:01,766 INFO L85 PathProgramCache]: Analyzing trace with hash -521057353, now seen corresponding path program 1 times [2021-11-20 07:18:01,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:18:01,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165260983] [2021-11-20 07:18:01,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:18:01,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:18:01,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:18:02,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:18:02,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:18:02,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 07:18:02,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:18:02,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-20 07:18:02,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:18:03,132 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 07:18:03,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:18:03,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165260983] [2021-11-20 07:18:03,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165260983] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:18:03,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089046954] [2021-11-20 07:18:03,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:18:03,133 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:18:03,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:18:03,133 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:18:03,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 07:18:03,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:18:03,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-20 07:18:03,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:18:03,290 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 07:18:04,291 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 23 treesize of output 15 [2021-11-20 07:18:09,105 INFO L354 Elim1Store]: treesize reduction 88, result has 16.2 percent of original size [2021-11-20 07:18:09,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 54 treesize of output 42 [2021-11-20 07:18:09,170 INFO L354 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2021-11-20 07:18:09,170 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 43 treesize of output 51 [2021-11-20 07:18:10,163 INFO L354 Elim1Store]: treesize reduction 87, result has 29.3 percent of original size [2021-11-20 07:18:10,164 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 5 case distinctions, treesize of input 67 treesize of output 74 [2021-11-20 07:18:10,424 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 43 treesize of output 27 [2021-11-20 07:18:10,755 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 07:18:10,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:18:15,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089046954] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:18:15,453 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:18:15,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-11-20 07:18:15,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093906656] [2021-11-20 07:18:15,453 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:18:15,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-20 07:18:15,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:18:15,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-20 07:18:15,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1588, Unknown=3, NotChecked=0, Total=1722 [2021-11-20 07:18:15,455 INFO L87 Difference]: Start difference. First operand 81 states and 89 transitions. Second operand has 38 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 34 states have internal predecessors, (78), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-20 07:18:26,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:18:26,086 INFO L93 Difference]: Finished difference Result 87 states and 97 transitions. [2021-11-20 07:18:26,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-20 07:18:26,087 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 34 states have internal predecessors, (78), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 52 [2021-11-20 07:18:26,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:18:26,088 INFO L225 Difference]: With dead ends: 87 [2021-11-20 07:18:26,088 INFO L226 Difference]: Without dead ends: 87 [2021-11-20 07:18:26,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 21.0s TimeCoverageRelationStatistics Valid=250, Invalid=2823, Unknown=7, NotChecked=0, Total=3080 [2021-11-20 07:18:26,090 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 27 mSDsluCounter, 780 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 828 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:18:26,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 828 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 422 Invalid, 0 Unknown, 145 Unchecked, 1.1s Time] [2021-11-20 07:18:26,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-20 07:18:26,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-11-20 07:18:26,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 71 states have (on average 1.2816901408450705) internal successors, (91), 82 states have internal predecessors, (91), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:18:26,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 97 transitions. [2021-11-20 07:18:26,094 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 97 transitions. Word has length 52 [2021-11-20 07:18:26,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:18:26,095 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 97 transitions. [2021-11-20 07:18:26,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 34 states have internal predecessors, (78), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-20 07:18:26,095 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 97 transitions. [2021-11-20 07:18:26,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-20 07:18:26,096 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:18:26,096 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:18:26,122 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-11-20 07:18:26,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:18:26,297 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 29 more)] === [2021-11-20 07:18:26,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:18:26,297 INFO L85 PathProgramCache]: Analyzing trace with hash -521057352, now seen corresponding path program 1 times [2021-11-20 07:18:26,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:18:26,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170137885] [2021-11-20 07:18:26,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:18:26,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:18:26,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:18:27,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:18:27,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:18:27,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 07:18:27,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:18:27,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-20 07:18:27,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:18:28,187 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 07:18:28,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:18:28,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170137885] [2021-11-20 07:18:28,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170137885] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:18:28,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307960848] [2021-11-20 07:18:28,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:18:28,188 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:18:28,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:18:28,189 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:18:28,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 07:18:28,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:18:28,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 65 conjunts are in the unsatisfiable core [2021-11-20 07:18:28,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:18:29,618 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 27 treesize of output 23 [2021-11-20 07:18:29,625 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 18 treesize of output 10 [2021-11-20 07:18:32,253 WARN L860 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.offset| Int) (|node_create_~temp~0#1.base| Int)) (let ((.cse0 (+ |node_create_~temp~0#1.offset| 4))) (and (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| (store (store (select |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base|) .cse0 0) |node_create_~temp~0#1.offset| (select (select |c_#memory_$Pointer$.base| |node_create_~temp~0#1.base|) |node_create_~temp~0#1.offset|)))) (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |node_create_~temp~0#1.base| (store (store (select |c_old(#memory_$Pointer$.offset)| |node_create_~temp~0#1.base|) .cse0 0) |node_create_~temp~0#1.offset| (select (select |c_#memory_$Pointer$.offset| |node_create_~temp~0#1.base|) |node_create_~temp~0#1.offset|))))))) is different from true [2021-11-20 07:18:32,453 INFO L354 Elim1Store]: treesize reduction 88, result has 16.2 percent of original size [2021-11-20 07:18:32,453 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 2 case distinctions, treesize of input 69 treesize of output 57 [2021-11-20 07:18:32,543 INFO L354 Elim1Store]: treesize reduction 88, result has 16.2 percent of original size [2021-11-20 07:18:32,543 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 2 case distinctions, treesize of input 58 treesize of output 50 [2021-11-20 07:18:34,397 INFO L354 Elim1Store]: treesize reduction 68, result has 26.9 percent of original size [2021-11-20 07:18:34,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 107 treesize of output 100 [2021-11-20 07:18:34,532 INFO L354 Elim1Store]: treesize reduction 80, result has 26.6 percent of original size [2021-11-20 07:18:34,532 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 98 treesize of output 100 [2021-11-20 07:18:35,538 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 53 treesize of output 41 [2021-11-20 07:18:35,547 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 38 treesize of output 22 [2021-11-20 07:18:35,683 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 3 not checked. [2021-11-20 07:18:35,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:18:36,847 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:18:36,848 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 63 treesize of output 67 [2021-11-20 07:18:57,953 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_append_~last~0#1.offset_19| Int)) (or (and (forall ((|ULTIMATE.start_sll_append_~new_last~0#1.offset| Int)) (<= 0 (+ (select (select (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|))) (store |c_#memory_$Pointer$.offset| .cse0 (store (select |c_#memory_$Pointer$.offset| .cse0) (+ |v_ULTIMATE.start_sll_append_~last~0#1.offset_19| 4) |ULTIMATE.start_sll_append_~new_last~0#1.offset|))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 4))) (forall ((v_prenex_6 Int)) (<= (select (select (let ((.cse1 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|))) (store |c_#memory_$Pointer$.offset| .cse1 (store (select |c_#memory_$Pointer$.offset| .cse1) (+ |v_ULTIMATE.start_sll_append_~last~0#1.offset_19| 4) v_prenex_6))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) |v_ULTIMATE.start_sll_append_~last~0#1.offset_19|)) (forall ((|ULTIMATE.start_sll_append_~new_last~0#1.base| Int)) (let ((.cse2 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|))) (= .cse2 (select (select (store |c_#memory_$Pointer$.base| .cse2 (store (select |c_#memory_$Pointer$.base| .cse2) (+ |v_ULTIMATE.start_sll_append_~last~0#1.offset_19| 4) |ULTIMATE.start_sll_append_~new_last~0#1.base|)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) (< |v_ULTIMATE.start_sll_append_~last~0#1.offset_19| (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|)))) is different from false [2021-11-20 07:19:01,072 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_node_create_~temp~0#1.offset_39| Int) (|v_ULTIMATE.start_sll_append_~last~0#1.offset_19| Int) (|v_node_create_~temp~0#1.base_44| Int) (v_DerPreprocessor_10 Int)) (or (<= |c_#StackHeapBarrier| |v_node_create_~temp~0#1.base_44|) (< |v_ULTIMATE.start_sll_append_~last~0#1.offset_19| (select (select (store |c_#memory_$Pointer$.offset| |v_node_create_~temp~0#1.base_44| (store (store (select |c_#memory_$Pointer$.offset| |v_node_create_~temp~0#1.base_44|) (+ |v_node_create_~temp~0#1.offset_39| 4) 0) |v_node_create_~temp~0#1.offset_39| v_DerPreprocessor_10)) |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|)) (and (forall ((v_DerPreprocessor_9 Int) (|ULTIMATE.start_sll_append_~new_last~0#1.base| Int)) (let ((.cse1 (store |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_44| (store (store (select |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_44|) (+ |v_node_create_~temp~0#1.offset_39| 4) 0) |v_node_create_~temp~0#1.offset_39| v_DerPreprocessor_9)))) (let ((.cse0 (select (select .cse1 |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|))) (= .cse0 (select (select (store .cse1 .cse0 (store (select .cse1 .cse0) (+ |v_ULTIMATE.start_sll_append_~last~0#1.offset_19| 4) |ULTIMATE.start_sll_append_~new_last~0#1.base|)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) (forall ((v_prenex_6 Int) (v_DerPreprocessor_9 Int)) (<= (select (select (let ((.cse4 (+ |v_node_create_~temp~0#1.offset_39| 4))) (let ((.cse2 (store |c_#memory_$Pointer$.offset| |v_node_create_~temp~0#1.base_44| (store (store (select |c_#memory_$Pointer$.offset| |v_node_create_~temp~0#1.base_44|) .cse4 0) |v_node_create_~temp~0#1.offset_39| v_DerPreprocessor_10))) (.cse3 (select (select (store |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_44| (store (store (select |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_44|) .cse4 0) |v_node_create_~temp~0#1.offset_39| v_DerPreprocessor_9)) |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|))) (store .cse2 .cse3 (store (select .cse2 .cse3) (+ |v_ULTIMATE.start_sll_append_~last~0#1.offset_19| 4) v_prenex_6)))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) |v_ULTIMATE.start_sll_append_~last~0#1.offset_19|)) (forall ((v_DerPreprocessor_9 Int) (|ULTIMATE.start_sll_append_~new_last~0#1.offset| Int)) (<= 0 (+ (select (select (let ((.cse7 (+ |v_node_create_~temp~0#1.offset_39| 4))) (let ((.cse5 (store |c_#memory_$Pointer$.offset| |v_node_create_~temp~0#1.base_44| (store (store (select |c_#memory_$Pointer$.offset| |v_node_create_~temp~0#1.base_44|) .cse7 0) |v_node_create_~temp~0#1.offset_39| v_DerPreprocessor_10))) (.cse6 (select (select (store |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_44| (store (store (select |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_44|) .cse7 0) |v_node_create_~temp~0#1.offset_39| v_DerPreprocessor_9)) |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|))) (store .cse5 .cse6 (store (select .cse5 .cse6) (+ |v_ULTIMATE.start_sll_append_~last~0#1.offset_19| 4) |ULTIMATE.start_sll_append_~new_last~0#1.offset|)))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 4)))))) is different from false [2021-11-20 07:19:01,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307960848] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:19:01,080 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:19:01,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 35 [2021-11-20 07:19:01,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137288944] [2021-11-20 07:19:01,081 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:19:01,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-20 07:19:01,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:19:01,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-20 07:19:01,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1505, Unknown=12, NotChecked=240, Total=1892 [2021-11-20 07:19:01,082 INFO L87 Difference]: Start difference. First operand 87 states and 97 transitions. Second operand has 36 states, 33 states have (on average 2.272727272727273) internal successors, (75), 32 states have internal predecessors, (75), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 07:19:18,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:19:18,322 INFO L93 Difference]: Finished difference Result 134 states and 147 transitions. [2021-11-20 07:19:18,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-20 07:19:18,323 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 33 states have (on average 2.272727272727273) internal successors, (75), 32 states have internal predecessors, (75), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 52 [2021-11-20 07:19:18,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:19:18,324 INFO L225 Difference]: With dead ends: 134 [2021-11-20 07:19:18,324 INFO L226 Difference]: Without dead ends: 134 [2021-11-20 07:19:18,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 769 ImplicationChecksByTransitivity, 44.6s TimeCoverageRelationStatistics Valid=241, Invalid=2726, Unknown=15, NotChecked=324, Total=3306 [2021-11-20 07:19:18,326 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 98 mSDsluCounter, 805 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 853 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 173 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:19:18,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 853 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 534 Invalid, 0 Unknown, 173 Unchecked, 2.2s Time] [2021-11-20 07:19:18,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-11-20 07:19:18,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 89. [2021-11-20 07:19:18,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 73 states have (on average 1.2602739726027397) internal successors, (92), 84 states have internal predecessors, (92), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:19:18,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 98 transitions. [2021-11-20 07:19:18,331 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 98 transitions. Word has length 52 [2021-11-20 07:19:18,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:19:18,332 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 98 transitions. [2021-11-20 07:19:18,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 33 states have (on average 2.272727272727273) internal successors, (75), 32 states have internal predecessors, (75), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 07:19:18,332 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 98 transitions. [2021-11-20 07:19:18,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-20 07:19:18,333 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:19:18,333 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 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 07:19:18,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 07:19:18,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-20 07:19:18,554 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 29 more)] === [2021-11-20 07:19:18,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:19:18,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1804686442, now seen corresponding path program 1 times [2021-11-20 07:19:18,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:19:18,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621765951] [2021-11-20 07:19:18,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:19:18,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:19:18,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:19,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:19:19,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:19,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 07:19:19,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:19,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-20 07:19:19,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:20,219 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 07:19:20,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:19:20,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621765951] [2021-11-20 07:19:20,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621765951] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:19:20,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203645954] [2021-11-20 07:19:20,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:19:20,220 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:19:20,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:19:20,221 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:19:20,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 07:19:20,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:20,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-20 07:19:20,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:19:21,934 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 21 treesize of output 13 [2021-11-20 07:19:24,405 WARN L860 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.offset| Int) (|node_create_~temp~0#1.base| Int)) (and (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| (store (store (select |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base|) (+ |node_create_~temp~0#1.offset| 4) 0) |node_create_~temp~0#1.offset| (select (select |c_#memory_$Pointer$.base| |node_create_~temp~0#1.base|) |node_create_~temp~0#1.offset|)))) (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|))) is different from true [2021-11-20 07:19:24,585 INFO L354 Elim1Store]: treesize reduction 88, result has 16.2 percent of original size [2021-11-20 07:19:24,585 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 2 case distinctions, treesize of input 43 treesize of output 31 [2021-11-20 07:19:24,909 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-20 07:19:24,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 21 [2021-11-20 07:19:25,121 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 3 not checked. [2021-11-20 07:19:25,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:19:27,677 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_11 Int) (|v_node_create_~temp~0#1.offset_42| Int) (|v_node_create_~temp~0#1.base_47| Int)) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_47| (store (store (select |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_47|) (+ |v_node_create_~temp~0#1.offset_42| 4) 0) |v_node_create_~temp~0#1.offset_42| v_DerPreprocessor_11)) |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|))) (or (<= (+ .cse0 1) 0) (<= 1 .cse0) (<= |c_#StackHeapBarrier| |v_node_create_~temp~0#1.base_47|)))) is different from false [2021-11-20 07:19:27,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203645954] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:19:27,682 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:19:27,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 27 [2021-11-20 07:19:27,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557944204] [2021-11-20 07:19:27,682 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:19:27,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-20 07:19:27,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:19:27,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-20 07:19:27,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=620, Unknown=2, NotChecked=102, Total=812 [2021-11-20 07:19:27,683 INFO L87 Difference]: Start difference. First operand 89 states and 98 transitions. Second operand has 27 states, 25 states have (on average 2.72) internal successors, (68), 23 states have internal predecessors, (68), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 07:19:40,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:19:40,820 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2021-11-20 07:19:40,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 07:19:40,821 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 2.72) internal successors, (68), 23 states have internal predecessors, (68), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 53 [2021-11-20 07:19:40,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:19:40,822 INFO L225 Difference]: With dead ends: 80 [2021-11-20 07:19:40,822 INFO L226 Difference]: Without dead ends: 80 [2021-11-20 07:19:40,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 56 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 18.8s TimeCoverageRelationStatistics Valid=150, Invalid=1044, Unknown=4, NotChecked=134, Total=1332 [2021-11-20 07:19:40,823 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 12 mSDsluCounter, 879 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 932 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-20 07:19:40,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 932 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 380 Invalid, 0 Unknown, 85 Unchecked, 1.6s Time] [2021-11-20 07:19:40,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-20 07:19:40,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-11-20 07:19:40,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 64 states have (on average 1.28125) internal successors, (82), 75 states have internal predecessors, (82), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:19:40,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2021-11-20 07:19:40,829 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 53 [2021-11-20 07:19:40,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:19:40,829 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2021-11-20 07:19:40,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 2.72) internal successors, (68), 23 states have internal predecessors, (68), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 07:19:40,830 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2021-11-20 07:19:40,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-20 07:19:40,831 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:19:40,831 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:19:40,856 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-11-20 07:19:41,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-20 07:19:41,032 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 29 more)] === [2021-11-20 07:19:41,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:19:41,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1027089942, now seen corresponding path program 1 times [2021-11-20 07:19:41,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:19:41,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756927341] [2021-11-20 07:19:41,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:19:41,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:19:41,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:42,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:19:42,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:42,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 07:19:42,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:42,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-20 07:19:42,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:42,471 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-20 07:19:42,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:19:42,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756927341] [2021-11-20 07:19:42,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756927341] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:19:42,471 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:19:42,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-20 07:19:42,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32440185] [2021-11-20 07:19:42,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:19:42,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 07:19:42,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:19:42,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 07:19:42,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-11-20 07:19:42,474 INFO L87 Difference]: Start difference. First operand 80 states and 88 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:19:45,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:19:45,956 INFO L93 Difference]: Finished difference Result 109 states and 117 transitions. [2021-11-20 07:19:45,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 07:19:45,957 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 53 [2021-11-20 07:19:45,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:19:45,958 INFO L225 Difference]: With dead ends: 109 [2021-11-20 07:19:45,958 INFO L226 Difference]: Without dead ends: 109 [2021-11-20 07:19:45,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2021-11-20 07:19:45,959 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 204 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:19:45,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 475 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-20 07:19:45,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-20 07:19:45,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 80. [2021-11-20 07:19:45,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 64 states have (on average 1.265625) internal successors, (81), 75 states have internal predecessors, (81), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:19:45,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 87 transitions. [2021-11-20 07:19:45,964 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 87 transitions. Word has length 53 [2021-11-20 07:19:45,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:19:45,964 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 87 transitions. [2021-11-20 07:19:45,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:19:45,965 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 87 transitions. [2021-11-20 07:19:45,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-20 07:19:45,965 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:19:45,965 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:19:45,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-20 07:19:45,966 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 29 more)] === [2021-11-20 07:19:45,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:19:45,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1947817869, now seen corresponding path program 2 times [2021-11-20 07:19:45,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:19:45,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028272999] [2021-11-20 07:19:45,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:19:45,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:19:45,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:49,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:19:49,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:49,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 07:19:49,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:51,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-20 07:19:51,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:52,584 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 07:19:52,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:19:52,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028272999] [2021-11-20 07:19:52,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028272999] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:19:52,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607423330] [2021-11-20 07:19:52,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:19:52,585 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:19:52,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:19:52,586 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:19:52,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-20 07:19:52,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:19:52,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:19:52,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 121 conjunts are in the unsatisfiable core [2021-11-20 07:19:52,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:19:53,011 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 07:19:54,013 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 13 treesize of output 9 [2021-11-20 07:19:54,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 07:19:56,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 07:19:56,679 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-20 07:19:56,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-11-20 07:19:56,801 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 07:19:56,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-20 07:19:56,839 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 28 treesize of output 20 [2021-11-20 07:19:57,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 07:19:57,769 INFO L354 Elim1Store]: treesize reduction 51, result has 15.0 percent of original size [2021-11-20 07:19:57,769 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 2 case distinctions, treesize of input 74 treesize of output 69 [2021-11-20 07:19:57,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 07:19:57,840 INFO L354 Elim1Store]: treesize reduction 75, result has 16.7 percent of original size [2021-11-20 07:19:57,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 78 treesize of output 73 [2021-11-20 07:19:59,971 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-20 07:19:59,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 3 case distinctions, treesize of input 121 treesize of output 70 [2021-11-20 07:19:59,988 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-20 07:19:59,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 35 [2021-11-20 07:20:03,170 WARN L860 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.offset| Int) (|node_create_~temp~0#1.base| Int)) (let ((.cse0 (+ |node_create_~temp~0#1.offset| 4))) (and (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| (store (store (select |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base|) .cse0 0) |node_create_~temp~0#1.offset| (select (select |c_#memory_$Pointer$.base| |node_create_~temp~0#1.base|) |node_create_~temp~0#1.offset|)))) (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |node_create_~temp~0#1.base| (store (store (select |c_old(#memory_$Pointer$.offset)| |node_create_~temp~0#1.base|) .cse0 0) |node_create_~temp~0#1.offset| (select (select |c_#memory_$Pointer$.offset| |node_create_~temp~0#1.base|) |node_create_~temp~0#1.offset|)))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|))))) is different from true [2021-11-20 07:20:03,591 INFO L354 Elim1Store]: treesize reduction 236, result has 11.6 percent of original size [2021-11-20 07:20:03,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 168 treesize of output 127 [2021-11-20 07:20:03,687 INFO L354 Elim1Store]: treesize reduction 28, result has 42.9 percent of original size [2021-11-20 07:20:03,688 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 157 treesize of output 159 [2021-11-20 07:20:03,918 INFO L354 Elim1Store]: treesize reduction 340, result has 11.2 percent of original size [2021-11-20 07:20:03,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 150 treesize of output 127 [2021-11-20 07:20:09,357 INFO L354 Elim1Store]: treesize reduction 198, result has 3.4 percent of original size [2021-11-20 07:20:09,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 213 treesize of output 128 [2021-11-20 07:20:09,480 INFO L354 Elim1Store]: treesize reduction 164, result has 4.1 percent of original size [2021-11-20 07:20:09,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 83 treesize of output 60 [2021-11-20 07:20:09,826 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 6 not checked. [2021-11-20 07:20:09,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:20:14,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607423330] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:20:14,925 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:20:14,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 55 [2021-11-20 07:20:14,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846172712] [2021-11-20 07:20:14,926 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:20:14,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-20 07:20:14,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:20:14,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-20 07:20:14,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=3347, Unknown=2, NotChecked=116, Total=3660 [2021-11-20 07:20:14,928 INFO L87 Difference]: Start difference. First operand 80 states and 87 transitions. Second operand has 55 states, 53 states have (on average 1.6415094339622642) internal successors, (87), 49 states have internal predecessors, (87), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 07:20:24,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:20:24,989 INFO L93 Difference]: Finished difference Result 103 states and 115 transitions. [2021-11-20 07:20:24,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-20 07:20:24,989 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 53 states have (on average 1.6415094339622642) internal successors, (87), 49 states have internal predecessors, (87), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 53 [2021-11-20 07:20:24,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:20:24,991 INFO L225 Difference]: With dead ends: 103 [2021-11-20 07:20:24,991 INFO L226 Difference]: Without dead ends: 103 [2021-11-20 07:20:24,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1316 ImplicationChecksByTransitivity, 24.6s TimeCoverageRelationStatistics Valid=321, Invalid=4937, Unknown=2, NotChecked=142, Total=5402 [2021-11-20 07:20:24,995 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 29 mSDsluCounter, 1206 mSDsCounter, 0 mSdLazyCounter, 1097 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 1259 SdHoareTripleChecker+Invalid, 1302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 171 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:20:24,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 1259 Invalid, 1302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1097 Invalid, 0 Unknown, 171 Unchecked, 5.2s Time] [2021-11-20 07:20:24,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-20 07:20:24,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 100. [2021-11-20 07:20:25,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 82 states have (on average 1.2317073170731707) internal successors, (101), 93 states have internal predecessors, (101), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 07:20:25,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 111 transitions. [2021-11-20 07:20:25,001 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 111 transitions. Word has length 53 [2021-11-20 07:20:25,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:20:25,002 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 111 transitions. [2021-11-20 07:20:25,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 53 states have (on average 1.6415094339622642) internal successors, (87), 49 states have internal predecessors, (87), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 07:20:25,003 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 111 transitions. [2021-11-20 07:20:25,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-20 07:20:25,004 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:20:25,004 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:20:25,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-20 07:20:25,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:20:25,214 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 29 more)] === [2021-11-20 07:20:25,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:20:25,214 INFO L85 PathProgramCache]: Analyzing trace with hash 729745886, now seen corresponding path program 1 times [2021-11-20 07:20:25,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:20:25,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433032954] [2021-11-20 07:20:25,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:20:25,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:20:25,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:27,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:20:27,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:27,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 07:20:27,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:28,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-20 07:20:28,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:29,947 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 07:20:29,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:20:29,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433032954] [2021-11-20 07:20:29,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433032954] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:20:29,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405926543] [2021-11-20 07:20:29,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:20:29,948 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:20:29,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:20:29,950 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:20:29,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-20 07:20:30,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:30,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 95 conjunts are in the unsatisfiable core [2021-11-20 07:20:30,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:20:30,075 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 07:20:30,324 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 07:20:31,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:20:31,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2021-11-20 07:20:32,335 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 07:20:32,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-11-20 07:20:33,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:20:33,234 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-20 07:20:33,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2021-11-20 07:20:34,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-11-20 07:20:36,370 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:20:36,370 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 44 [2021-11-20 07:20:36,384 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-20 07:20:36,384 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 41 treesize of output 35 [2021-11-20 07:20:36,395 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 11 treesize of output 7 [2021-11-20 07:20:39,892 WARN L860 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.offset| Int) (|node_create_~temp~0#1.base| Int)) (let ((.cse0 (+ |node_create_~temp~0#1.offset| 4))) (and (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| (store (store (select |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base|) .cse0 0) |node_create_~temp~0#1.offset| (select (select |c_#memory_$Pointer$.base| |node_create_~temp~0#1.base|) |node_create_~temp~0#1.offset|)))) (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |node_create_~temp~0#1.base| (store (store (select |c_old(#memory_$Pointer$.offset)| |node_create_~temp~0#1.base|) .cse0 0) |node_create_~temp~0#1.offset| (select (select |c_#memory_$Pointer$.offset| |node_create_~temp~0#1.base|) |node_create_~temp~0#1.offset|)))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|))))) is different from true [2021-11-20 07:20:40,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:20:40,266 INFO L354 Elim1Store]: treesize reduction 150, result has 13.8 percent of original size [2021-11-20 07:20:40,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 134 treesize of output 96 [2021-11-20 07:20:40,367 INFO L354 Elim1Store]: treesize reduction 64, result has 24.7 percent of original size [2021-11-20 07:20:40,367 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 123 treesize of output 123 [2021-11-20 07:20:40,491 INFO L354 Elim1Store]: treesize reduction 88, result has 16.2 percent of original size [2021-11-20 07:20:40,491 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 2 case distinctions, treesize of input 111 treesize of output 103 [2021-11-20 07:20:43,755 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 6 not checked. [2021-11-20 07:20:43,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:20:48,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405926543] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:20:48,874 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:20:48,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25] total 46 [2021-11-20 07:20:48,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24880802] [2021-11-20 07:20:48,875 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:20:48,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-20 07:20:48,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:20:48,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-20 07:20:48,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=2724, Unknown=1, NotChecked=104, Total=2970 [2021-11-20 07:20:48,877 INFO L87 Difference]: Start difference. First operand 100 states and 111 transitions. Second operand has 46 states, 44 states have (on average 2.2045454545454546) internal successors, (97), 40 states have internal predecessors, (97), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-20 07:21:11,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:21:11,476 INFO L93 Difference]: Finished difference Result 92 states and 101 transitions. [2021-11-20 07:21:11,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-20 07:21:11,476 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 44 states have (on average 2.2045454545454546) internal successors, (97), 40 states have internal predecessors, (97), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 56 [2021-11-20 07:21:11,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:21:11,478 INFO L225 Difference]: With dead ends: 92 [2021-11-20 07:21:11,478 INFO L226 Difference]: Without dead ends: 92 [2021-11-20 07:21:11,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 36.2s TimeCoverageRelationStatistics Valid=314, Invalid=4801, Unknown=1, NotChecked=140, Total=5256 [2021-11-20 07:21:11,481 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 35 mSDsluCounter, 1054 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 1107 SdHoareTripleChecker+Invalid, 946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 137 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-11-20 07:21:11,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 1107 Invalid, 946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 790 Invalid, 0 Unknown, 137 Unchecked, 3.7s Time] [2021-11-20 07:21:11,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-20 07:21:11,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-11-20 07:21:11,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 74 states have (on average 1.2297297297297298) internal successors, (91), 85 states have internal predecessors, (91), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 07:21:11,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 101 transitions. [2021-11-20 07:21:11,487 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 101 transitions. Word has length 56 [2021-11-20 07:21:11,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:21:11,488 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 101 transitions. [2021-11-20 07:21:11,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 44 states have (on average 2.2045454545454546) internal successors, (97), 40 states have internal predecessors, (97), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-20 07:21:11,488 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 101 transitions. [2021-11-20 07:21:11,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-20 07:21:11,489 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:21:11,489 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 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] [2021-11-20 07:21:11,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-20 07:21:11,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:21:11,710 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 29 more)] === [2021-11-20 07:21:11,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:21:11,710 INFO L85 PathProgramCache]: Analyzing trace with hash 294390785, now seen corresponding path program 1 times [2021-11-20 07:21:11,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:21:11,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706340908] [2021-11-20 07:21:11,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:21:11,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:21:11,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:21:14,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:21:14,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:21:14,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 07:21:14,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:21:14,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-20 07:21:14,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:21:15,383 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 07:21:15,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:21:15,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706340908] [2021-11-20 07:21:15,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706340908] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:21:15,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748722793] [2021-11-20 07:21:15,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:21:15,384 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:21:15,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:21:15,385 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:21:15,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-20 07:21:15,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:21:15,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 82 conjunts are in the unsatisfiable core [2021-11-20 07:21:15,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:21:17,153 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 07:21:18,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-20 07:21:20,098 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:21:20,098 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 22 [2021-11-20 07:21:20,114 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 11 treesize of output 7 [2021-11-20 07:21:23,427 WARN L860 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.offset| Int) (|node_create_~temp~0#1.base| Int)) (let ((.cse0 (+ |node_create_~temp~0#1.offset| 4))) (and (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| (store (store (select |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base|) .cse0 0) |node_create_~temp~0#1.offset| (select (select |c_#memory_$Pointer$.base| |node_create_~temp~0#1.base|) |node_create_~temp~0#1.offset|)))) (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (= (store |c_old(#valid)| |node_create_~temp~0#1.base| 1) |c_#valid|) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |node_create_~temp~0#1.base| (store (store (select |c_old(#memory_$Pointer$.offset)| |node_create_~temp~0#1.base|) .cse0 0) |node_create_~temp~0#1.offset| (select (select |c_#memory_$Pointer$.offset| |node_create_~temp~0#1.base|) |node_create_~temp~0#1.offset|)))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|))))) is different from true [2021-11-20 07:21:23,765 INFO L354 Elim1Store]: treesize reduction 88, result has 16.2 percent of original size [2021-11-20 07:21:23,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 86 treesize of output 78 [2021-11-20 07:21:23,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:21:23,982 INFO L354 Elim1Store]: treesize reduction 150, result has 13.8 percent of original size [2021-11-20 07:21:23,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 75 treesize of output 69 [2021-11-20 07:21:24,084 INFO L354 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2021-11-20 07:21:24,084 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 64 treesize of output 72 [2021-11-20 07:21:25,018 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-20 07:21:25,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 37 [2021-11-20 07:21:27,584 INFO L354 Elim1Store]: treesize reduction 102, result has 28.2 percent of original size [2021-11-20 07:21:27,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 82 [2021-11-20 07:21:28,856 INFO L354 Elim1Store]: treesize reduction 61, result has 11.6 percent of original size [2021-11-20 07:21:28,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 90 treesize of output 57 [2021-11-20 07:21:29,695 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 6 not checked. [2021-11-20 07:21:29,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:21:45,732 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_sll_append_~last~0#1.offset| Int) (|ULTIMATE.start_sll_append_~new_last~0#1.base| Int)) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_#t~mem10#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_#t~mem10#1.base|) (+ |ULTIMATE.start_sll_append_~last~0#1.offset| 4) |ULTIMATE.start_sll_append_~new_last~0#1.base|)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) 1)) is different from false [2021-11-20 07:21:47,750 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_append_~last~0#1.offset_25| Int) (|ULTIMATE.start_sll_append_~new_last~0#1.base| Int)) (= (select |c_#valid| (select (select (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_~last~0#1.base|) (+ |c_ULTIMATE.start_sll_append_~last~0#1.offset| 4)))) (store |c_#memory_$Pointer$.base| .cse0 (store (select |c_#memory_$Pointer$.base| .cse0) (+ |v_ULTIMATE.start_sll_append_~last~0#1.offset_25| 4) |ULTIMATE.start_sll_append_~new_last~0#1.base|))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) 1)) is different from false [2021-11-20 07:22:06,352 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_append_~last~0#1.offset_25| Int) (|ULTIMATE.start_sll_append_~new_last~0#1.base| Int)) (= (select |c_#valid| (select (select (let ((.cse0 (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|)) (+ (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|) 4)))) (store |c_#memory_$Pointer$.base| .cse0 (store (select |c_#memory_$Pointer$.base| .cse0) (+ |v_ULTIMATE.start_sll_append_~last~0#1.offset_25| 4) |ULTIMATE.start_sll_append_~new_last~0#1.base|))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) 1)) is different from false [2021-11-20 07:22:07,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748722793] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:22:07,226 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:22:07,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27] total 52 [2021-11-20 07:22:07,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548259623] [2021-11-20 07:22:07,226 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:22:07,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-20 07:22:07,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:22:07,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-20 07:22:07,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=2769, Unknown=14, NotChecked=436, Total=3422 [2021-11-20 07:22:07,229 INFO L87 Difference]: Start difference. First operand 92 states and 101 transitions. Second operand has 53 states, 50 states have (on average 1.96) internal successors, (98), 48 states have internal predecessors, (98), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-20 07:22:20,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:22:20,552 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2021-11-20 07:22:20,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-20 07:22:20,553 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 50 states have (on average 1.96) internal successors, (98), 48 states have internal predecessors, (98), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 56 [2021-11-20 07:22:20,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:22:20,554 INFO L225 Difference]: With dead ends: 100 [2021-11-20 07:22:20,555 INFO L226 Difference]: Without dead ends: 100 [2021-11-20 07:22:20,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 1480 ImplicationChecksByTransitivity, 60.0s TimeCoverageRelationStatistics Valid=393, Invalid=5008, Unknown=17, NotChecked=588, Total=6006 [2021-11-20 07:22:20,558 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 46 mSDsluCounter, 1037 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 1082 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 157 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-20 07:22:20,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 1082 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 573 Invalid, 0 Unknown, 157 Unchecked, 2.6s Time] [2021-11-20 07:22:20,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-11-20 07:22:20,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2021-11-20 07:22:20,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 81 states have (on average 1.2469135802469136) internal successors, (101), 92 states have internal predecessors, (101), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 07:22:20,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 111 transitions. [2021-11-20 07:22:20,565 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 111 transitions. Word has length 56 [2021-11-20 07:22:20,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:22:20,565 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 111 transitions. [2021-11-20 07:22:20,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 50 states have (on average 1.96) internal successors, (98), 48 states have internal predecessors, (98), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-20 07:22:20,566 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 111 transitions. [2021-11-20 07:22:20,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-20 07:22:20,567 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:22:20,567 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 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] [2021-11-20 07:22:20,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-20 07:22:20,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-20 07:22:20,782 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 29 more)] === [2021-11-20 07:22:20,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:22:20,782 INFO L85 PathProgramCache]: Analyzing trace with hash 294390786, now seen corresponding path program 1 times [2021-11-20 07:22:20,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:22:20,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741869712] [2021-11-20 07:22:20,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:22:20,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:22:20,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:24,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:22:24,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:24,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 07:22:24,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:25,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-20 07:22:25,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:25,966 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 17 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 07:22:25,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:22:25,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741869712] [2021-11-20 07:22:25,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741869712] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:22:25,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830160212] [2021-11-20 07:22:25,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:22:25,967 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:22:25,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:22:25,968 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:22:25,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-20 07:22:26,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:26,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 90 conjunts are in the unsatisfiable core [2021-11-20 07:22:26,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:22:27,518 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 07:22:27,548 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 07:22:28,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-20 07:22:30,543 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:22:30,544 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 27 [2021-11-20 07:22:30,560 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 11 treesize of output 7 [2021-11-20 07:22:33,877 WARN L860 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.offset| Int) (|node_create_~temp~0#1.base| Int)) (let ((.cse0 (+ |node_create_~temp~0#1.offset| 4))) (and (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| (store (store (select |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base|) .cse0 0) |node_create_~temp~0#1.offset| (select (select |c_#memory_$Pointer$.base| |node_create_~temp~0#1.base|) |node_create_~temp~0#1.offset|)))) (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |node_create_~temp~0#1.base| (store (store (select |c_old(#memory_$Pointer$.offset)| |node_create_~temp~0#1.base|) .cse0 0) |node_create_~temp~0#1.offset| (select (select |c_#memory_$Pointer$.offset| |node_create_~temp~0#1.base|) |node_create_~temp~0#1.offset|)))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)) (= (store |c_old(#length)| |node_create_~temp~0#1.base| 8) |c_#length|)))) is different from true [2021-11-20 07:22:34,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:22:34,287 INFO L354 Elim1Store]: treesize reduction 150, result has 13.8 percent of original size [2021-11-20 07:22:34,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 95 treesize of output 85 [2021-11-20 07:22:34,425 INFO L354 Elim1Store]: treesize reduction 88, result has 16.2 percent of original size [2021-11-20 07:22:34,426 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 2 case distinctions, treesize of input 84 treesize of output 76 [2021-11-20 07:22:34,472 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-20 07:22:34,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 73 [2021-11-20 07:22:34,535 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 07:22:34,535 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 67 treesize of output 69 [2021-11-20 07:22:38,485 INFO L354 Elim1Store]: treesize reduction 210, result has 17.0 percent of original size [2021-11-20 07:22:38,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 148 treesize of output 114 [2021-11-20 07:22:38,680 INFO L354 Elim1Store]: treesize reduction 68, result has 26.9 percent of original size [2021-11-20 07:22:38,681 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 102 treesize of output 112 [2021-11-20 07:22:40,403 INFO L354 Elim1Store]: treesize reduction 61, result has 11.6 percent of original size [2021-11-20 07:22:40,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 123 treesize of output 90 [2021-11-20 07:22:40,482 INFO L354 Elim1Store]: treesize reduction 33, result has 19.5 percent of original size [2021-11-20 07:22:40,482 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 90 treesize of output 78 [2021-11-20 07:22:41,305 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 6 not checked. [2021-11-20 07:22:41,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:23:38,294 WARN L227 SmtUtils]: Spent 6.10s on a formula simplification that was a NOOP. DAG size: 31 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 07:24:23,426 WARN L227 SmtUtils]: Spent 10.03s on a formula simplification that was a NOOP. DAG size: 41 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 07:24:25,522 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_subst_2 Int) (|ULTIMATE.start_sll_append_~new_last~0#1.base| Int) (|ULTIMATE.start_sll_append_~new_last~0#1.offset| Int)) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_#t~mem9#1.base|) (+ |c_ULTIMATE.start_sll_append_#t~mem9#1.offset| 4))) (.cse1 (+ v_subst_2 4))) (<= (+ (select (select (store |c_#memory_$Pointer$.offset| .cse0 (store (select |c_#memory_$Pointer$.offset| .cse0) .cse1 |ULTIMATE.start_sll_append_~new_last~0#1.offset|)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 8) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse0 (store (select |c_#memory_$Pointer$.base| .cse0) .cse1 |ULTIMATE.start_sll_append_~new_last~0#1.base|)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) (forall ((v_subst_1 Int) (|ULTIMATE.start_sll_append_~new_last~0#1.offset| Int)) (<= 0 (+ 4 (select (select (let ((.cse2 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_#t~mem9#1.base|) (+ |c_ULTIMATE.start_sll_append_#t~mem9#1.offset| 4)))) (store |c_#memory_$Pointer$.offset| .cse2 (store (select |c_#memory_$Pointer$.offset| .cse2) (+ v_subst_1 4) |ULTIMATE.start_sll_append_~new_last~0#1.offset|))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) is different from false [2021-11-20 07:24:50,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830160212] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:24:50,710 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:24:50,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 27] total 55 [2021-11-20 07:24:50,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370021211] [2021-11-20 07:24:50,710 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:24:50,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-20 07:24:50,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:24:50,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-20 07:24:50,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=3634, Unknown=39, NotChecked=246, Total=4160 [2021-11-20 07:24:50,712 INFO L87 Difference]: Start difference. First operand 99 states and 111 transitions. Second operand has 56 states, 53 states have (on average 1.8679245283018868) internal successors, (99), 51 states have internal predecessors, (99), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 07:25:06,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:25:06,377 INFO L93 Difference]: Finished difference Result 100 states and 111 transitions. [2021-11-20 07:25:06,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-20 07:25:06,378 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 53 states have (on average 1.8679245283018868) internal successors, (99), 51 states have internal predecessors, (99), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 56 [2021-11-20 07:25:06,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:25:06,379 INFO L225 Difference]: With dead ends: 100 [2021-11-20 07:25:06,379 INFO L226 Difference]: Without dead ends: 100 [2021-11-20 07:25:06,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2290 ImplicationChecksByTransitivity, 153.3s TimeCoverageRelationStatistics Valid=455, Invalid=6317, Unknown=42, NotChecked=326, Total=7140 [2021-11-20 07:25:06,380 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 53 mSDsluCounter, 982 mSDsCounter, 0 mSdLazyCounter, 818 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 1028 SdHoareTripleChecker+Invalid, 939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-11-20 07:25:06,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 1028 Invalid, 939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 818 Invalid, 0 Unknown, 106 Unchecked, 3.7s Time] [2021-11-20 07:25:06,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-11-20 07:25:06,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2021-11-20 07:25:06,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 81 states have (on average 1.2345679012345678) internal successors, (100), 92 states have internal predecessors, (100), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 07:25:06,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 110 transitions. [2021-11-20 07:25:06,386 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 110 transitions. Word has length 56 [2021-11-20 07:25:06,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:25:06,387 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 110 transitions. [2021-11-20 07:25:06,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 53 states have (on average 1.8679245283018868) internal successors, (99), 51 states have internal predecessors, (99), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 07:25:06,387 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 110 transitions. [2021-11-20 07:25:06,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-20 07:25:06,388 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:25:06,388 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 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] [2021-11-20 07:25:06,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-20 07:25:06,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-20 07:25:06,610 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 29 more)] === [2021-11-20 07:25:06,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:25:06,610 INFO L85 PathProgramCache]: Analyzing trace with hash 536178444, now seen corresponding path program 1 times [2021-11-20 07:25:06,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:25:06,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280776868] [2021-11-20 07:25:06,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:25:06,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:25:06,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:25:08,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:25:08,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:25:08,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 07:25:08,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:25:08,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-20 07:25:08,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:25:09,372 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 07:25:09,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:25:09,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280776868] [2021-11-20 07:25:09,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280776868] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:25:09,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867406501] [2021-11-20 07:25:09,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:25:09,373 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:25:09,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:25:09,377 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:25:09,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-20 07:25:09,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:25:09,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-20 07:25:09,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:25:11,244 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 14 treesize of output 10 [2021-11-20 07:25:14,004 WARN L860 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.offset| Int) (|node_create_~temp~0#1.base| Int)) (and (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| (store (store (select |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base|) (+ |node_create_~temp~0#1.offset| 4) 0) |node_create_~temp~0#1.offset| (select (select |c_#memory_$Pointer$.base| |node_create_~temp~0#1.base|) |node_create_~temp~0#1.offset|)))) (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|))) is different from true [2021-11-20 07:25:14,226 INFO L354 Elim1Store]: treesize reduction 88, result has 16.2 percent of original size [2021-11-20 07:25:14,226 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 2 case distinctions, treesize of input 34 treesize of output 26 [2021-11-20 07:25:15,767 INFO L354 Elim1Store]: treesize reduction 87, result has 29.3 percent of original size [2021-11-20 07:25:15,768 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 5 case distinctions, treesize of input 45 treesize of output 60 [2021-11-20 07:25:15,868 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 16 treesize of output 8 [2021-11-20 07:25:15,900 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 3 not checked. [2021-11-20 07:25:15,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:25:33,368 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_node_create_~temp~0#1.base_62| Int) (|ULTIMATE.start_sll_append_~last~0#1.base| Int) (|v_node_create_~temp~0#1.offset_57| Int) (|ULTIMATE.start_sll_append_~last~0#1.offset| Int) (v_DerPreprocessor_20 Int) (|ULTIMATE.start_sll_append_~new_last~0#1.base| Int)) (let ((.cse0 (store |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_62| (store (store (select |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_62|) (+ |v_node_create_~temp~0#1.offset_57| 4) 0) |v_node_create_~temp~0#1.offset_57| v_DerPreprocessor_20)))) (let ((.cse1 (select .cse0 |ULTIMATE.start_sll_append_~last~0#1.base|)) (.cse2 (+ |ULTIMATE.start_sll_append_~last~0#1.offset| 4))) (or (<= |c_#StackHeapBarrier| |v_node_create_~temp~0#1.base_62|) (not (= (select (select (store .cse0 |ULTIMATE.start_sll_append_~last~0#1.base| (store .cse1 .cse2 |ULTIMATE.start_sll_append_~new_last~0#1.base|)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 0)) (not (= (select .cse1 .cse2) 0)))))) is different from false [2021-11-20 07:25:33,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867406501] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:25:33,374 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:25:33,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-11-20 07:25:33,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666302849] [2021-11-20 07:25:33,375 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:25:33,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-20 07:25:33,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:25:33,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-20 07:25:33,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1352, Unknown=9, NotChecked=150, Total=1640 [2021-11-20 07:25:33,376 INFO L87 Difference]: Start difference. First operand 99 states and 110 transitions. Second operand has 37 states, 35 states have (on average 2.342857142857143) internal successors, (82), 33 states have internal predecessors, (82), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-20 07:25:46,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:25:46,173 INFO L93 Difference]: Finished difference Result 109 states and 119 transitions. [2021-11-20 07:25:46,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-20 07:25:46,174 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 2.342857142857143) internal successors, (82), 33 states have internal predecessors, (82), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 57 [2021-11-20 07:25:46,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:25:46,178 INFO L225 Difference]: With dead ends: 109 [2021-11-20 07:25:46,178 INFO L226 Difference]: Without dead ends: 109 [2021-11-20 07:25:46,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 34.5s TimeCoverageRelationStatistics Valid=241, Invalid=2512, Unknown=11, NotChecked=206, Total=2970 [2021-11-20 07:25:46,179 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 105 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 687 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:25:46,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 687 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 441 Invalid, 0 Unknown, 89 Unchecked, 2.0s Time] [2021-11-20 07:25:46,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-20 07:25:46,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 100. [2021-11-20 07:25:46,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 82 states have (on average 1.2195121951219512) internal successors, (100), 93 states have internal predecessors, (100), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 07:25:46,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 110 transitions. [2021-11-20 07:25:46,185 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 110 transitions. Word has length 57 [2021-11-20 07:25:46,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:25:46,186 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 110 transitions. [2021-11-20 07:25:46,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 2.342857142857143) internal successors, (82), 33 states have internal predecessors, (82), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-20 07:25:46,186 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 110 transitions. [2021-11-20 07:25:46,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-20 07:25:46,187 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:25:46,187 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 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 07:25:46,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-20 07:25:46,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:25:46,414 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 29 more)] === [2021-11-20 07:25:46,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:25:46,414 INFO L85 PathProgramCache]: Analyzing trace with hash -558295485, now seen corresponding path program 1 times [2021-11-20 07:25:46,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:25:46,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248381844] [2021-11-20 07:25:46,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:25:46,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:25:46,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:25:47,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:25:47,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:25:47,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 07:25:47,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:25:48,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-20 07:25:48,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:25:48,888 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 07:25:48,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:25:48,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248381844] [2021-11-20 07:25:48,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248381844] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:25:48,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563893680] [2021-11-20 07:25:48,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:25:48,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:25:48,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:25:48,890 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:25:48,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-20 07:25:48,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:25:48,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-20 07:25:48,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:25:50,759 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 21 treesize of output 17 [2021-11-20 07:25:50,770 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 13 treesize of output 9 [2021-11-20 07:25:53,596 WARN L860 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.offset| Int) (|node_create_~temp~0#1.base| Int)) (let ((.cse0 (+ |node_create_~temp~0#1.offset| 4))) (and (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| (store (store (select |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base|) .cse0 0) |node_create_~temp~0#1.offset| (select (select |c_#memory_$Pointer$.base| |node_create_~temp~0#1.base|) |node_create_~temp~0#1.offset|)))) (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |node_create_~temp~0#1.base| (store (store (select |c_old(#memory_$Pointer$.offset)| |node_create_~temp~0#1.base|) .cse0 0) |node_create_~temp~0#1.offset| (select (select |c_#memory_$Pointer$.offset| |node_create_~temp~0#1.base|) |node_create_~temp~0#1.offset|))))))) is different from true [2021-11-20 07:25:53,844 INFO L354 Elim1Store]: treesize reduction 88, result has 16.2 percent of original size [2021-11-20 07:25:53,844 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 2 case distinctions, treesize of input 61 treesize of output 53 [2021-11-20 07:25:53,963 INFO L354 Elim1Store]: treesize reduction 88, result has 16.2 percent of original size [2021-11-20 07:25:53,963 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 2 case distinctions, treesize of input 50 treesize of output 42 [2021-11-20 07:25:55,147 INFO L354 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2021-11-20 07:25:55,147 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 41 treesize of output 51 [2021-11-20 07:25:56,326 INFO L354 Elim1Store]: treesize reduction 68, result has 26.9 percent of original size [2021-11-20 07:25:56,327 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 46 treesize of output 56 [2021-11-20 07:25:56,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-20 07:25:56,487 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 3 not checked. [2021-11-20 07:25:56,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:25:56,751 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 7 treesize of output 5 [2021-11-20 07:26:00,837 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_22 Int) (|ULTIMATE.start_sll_append_~last~0#1.base| Int) (|ULTIMATE.start_sll_append_~last~0#1.offset| Int) (|v_node_create_~temp~0#1.offset_60| Int) (|v_node_create_~temp~0#1.base_65| Int) (v_DerPreprocessor_21 Int) (|ULTIMATE.start_sll_append_~new_last~0#1.offset| Int)) (let ((.cse1 (+ |ULTIMATE.start_sll_append_~last~0#1.offset| 4)) (.cse0 (+ |v_node_create_~temp~0#1.offset_60| 4))) (or (not (= (select (select (store |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_65| (store (store (select |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_65|) .cse0 0) |v_node_create_~temp~0#1.offset_60| v_DerPreprocessor_22)) |ULTIMATE.start_sll_append_~last~0#1.base|) .cse1) 0)) (<= 0 (select (select (let ((.cse2 (store |c_#memory_$Pointer$.offset| |v_node_create_~temp~0#1.base_65| (store (store (select |c_#memory_$Pointer$.offset| |v_node_create_~temp~0#1.base_65|) .cse0 0) |v_node_create_~temp~0#1.offset_60| v_DerPreprocessor_21)))) (store .cse2 |ULTIMATE.start_sll_append_~last~0#1.base| (store (select .cse2 |ULTIMATE.start_sll_append_~last~0#1.base|) .cse1 |ULTIMATE.start_sll_append_~new_last~0#1.offset|))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (<= |c_#StackHeapBarrier| |v_node_create_~temp~0#1.base_65|)))) is different from false [2021-11-20 07:26:00,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563893680] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:26:00,843 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:26:00,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 35 [2021-11-20 07:26:00,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649871242] [2021-11-20 07:26:00,844 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:26:00,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-20 07:26:00,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:26:00,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-20 07:26:00,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1587, Unknown=2, NotChecked=162, Total=1892 [2021-11-20 07:26:00,846 INFO L87 Difference]: Start difference. First operand 100 states and 110 transitions. Second operand has 36 states, 33 states have (on average 2.515151515151515) internal successors, (83), 31 states have internal predecessors, (83), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-20 07:26:14,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:26:14,338 INFO L93 Difference]: Finished difference Result 110 states and 119 transitions. [2021-11-20 07:26:14,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-20 07:26:14,339 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 33 states have (on average 2.515151515151515) internal successors, (83), 31 states have internal predecessors, (83), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 58 [2021-11-20 07:26:14,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:26:14,340 INFO L225 Difference]: With dead ends: 110 [2021-11-20 07:26:14,341 INFO L226 Difference]: Without dead ends: 110 [2021-11-20 07:26:14,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 22.5s TimeCoverageRelationStatistics Valid=234, Invalid=2526, Unknown=4, NotChecked=206, Total=2970 [2021-11-20 07:26:14,342 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 64 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:26:14,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 559 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 253 Invalid, 0 Unknown, 121 Unchecked, 1.1s Time] [2021-11-20 07:26:14,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-11-20 07:26:14,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 103. [2021-11-20 07:26:14,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 85 states have (on average 1.2352941176470589) internal successors, (105), 96 states have internal predecessors, (105), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 07:26:14,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 115 transitions. [2021-11-20 07:26:14,349 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 115 transitions. Word has length 58 [2021-11-20 07:26:14,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:26:14,349 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 115 transitions. [2021-11-20 07:26:14,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 33 states have (on average 2.515151515151515) internal successors, (83), 31 states have internal predecessors, (83), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-20 07:26:14,350 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 115 transitions. [2021-11-20 07:26:14,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-20 07:26:14,351 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:26:14,351 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 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, 1, 1] [2021-11-20 07:26:14,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-20 07:26:14,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-11-20 07:26:14,578 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 29 more)] === [2021-11-20 07:26:14,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:26:14,578 INFO L85 PathProgramCache]: Analyzing trace with hash 348951848, now seen corresponding path program 1 times [2021-11-20 07:26:14,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:26:14,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377780099] [2021-11-20 07:26:14,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:26:14,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:26:14,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:20,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:26:20,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:21,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 07:26:21,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:22,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-20 07:26:22,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:25,188 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 07:26:25,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:26:25,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377780099] [2021-11-20 07:26:25,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377780099] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:26:25,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095590098] [2021-11-20 07:26:25,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:26:25,189 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:26:25,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:26:25,190 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:26:25,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67149c36-1053-4c13-90fd-c7ba120306b6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-20 07:26:25,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:25,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 111 conjunts are in the unsatisfiable core [2021-11-20 07:26:25,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:26:28,018 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 07:26:28,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 07:26:29,802 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 07:26:29,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-20 07:26:30,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-11-20 07:26:30,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:30,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-20 07:26:33,513 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:26:33,513 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 38 [2021-11-20 07:26:33,539 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 07:26:33,539 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 31 [2021-11-20 07:26:33,559 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 11 treesize of output 7 [2021-11-20 07:26:46,121 INFO L354 Elim1Store]: treesize reduction 108, result has 16.3 percent of original size [2021-11-20 07:26:46,122 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 2 case distinctions, treesize of input 136 treesize of output 139 [2021-11-20 07:26:46,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:26:46,316 INFO L354 Elim1Store]: treesize reduction 150, result has 13.8 percent of original size [2021-11-20 07:26:46,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 120 treesize of output 90 [2021-11-20 07:26:46,418 INFO L354 Elim1Store]: treesize reduction 28, result has 42.9 percent of original size [2021-11-20 07:26:46,419 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 109 treesize of output 111 [2021-11-20 07:26:46,596 INFO L354 Elim1Store]: treesize reduction 88, result has 16.2 percent of original size [2021-11-20 07:26:46,596 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 2 case distinctions, treesize of input 102 treesize of output 94 [2021-11-20 07:26:58,035 INFO L354 Elim1Store]: treesize reduction 226, result has 10.7 percent of original size [2021-11-20 07:26:58,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 234 treesize of output 122 [2021-11-20 07:26:58,165 INFO L354 Elim1Store]: treesize reduction 108, result has 13.6 percent of original size [2021-11-20 07:26:58,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 163 treesize of output 157 [2021-11-20 07:26:58,234 INFO L354 Elim1Store]: treesize reduction 71, result has 13.4 percent of original size [2021-11-20 07:26:58,234 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 134 treesize of output 94 [2021-11-20 07:26:59,112 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-11-20 07:26:59,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 105 treesize of output 62 [2021-11-20 07:26:59,127 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-20 07:26:59,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 26 [2021-11-20 07:27:00,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-20 07:27:00,675 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:27:00,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:27:04,052 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_24 Int) (|ULTIMATE.start_sll_append_~last~0#1.offset| Int) (|ULTIMATE.start_sll_append_~new_last~0#1.base| Int) (|ULTIMATE.start_sll_append_~new_last~0#1.offset| Int)) (= (let ((.cse0 (+ |ULTIMATE.start_sll_append_~last~0#1.offset| 4))) (select (select (store |c_#memory_int| |c_ULTIMATE.start_sll_append_~last~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_sll_append_~last~0#1.base|) .cse0 v_DerPreprocessor_24)) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_~last~0#1.base|) .cse0 |ULTIMATE.start_sll_append_~new_last~0#1.base|)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_append_~last~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_append_~last~0#1.base|) .cse0 |ULTIMATE.start_sll_append_~new_last~0#1.offset|)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) |c_ULTIMATE.start_main_~data~0#1|)) is different from false [2021-11-20 07:27:06,102 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_24 Int) (|ULTIMATE.start_sll_append_~last~0#1.offset| Int) (|ULTIMATE.start_sll_append_~new_last~0#1.base| Int) (|ULTIMATE.start_sll_append_~new_last~0#1.offset| Int)) (= |c_ULTIMATE.start_main_~data~0#1| (let ((.cse0 (+ |ULTIMATE.start_sll_append_~last~0#1.offset| 4))) (select (select (store |c_#memory_int| |c_ULTIMATE.start_sll_append_#t~mem10#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_sll_append_#t~mem10#1.base|) .cse0 v_DerPreprocessor_24)) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_#t~mem10#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_#t~mem10#1.base|) .cse0 |ULTIMATE.start_sll_append_~new_last~0#1.base|)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_append_#t~mem10#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_append_#t~mem10#1.base|) .cse0 |ULTIMATE.start_sll_append_~new_last~0#1.offset|)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) is different from false [2021-11-20 07:28:24,337 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_24 Int) (|ULTIMATE.start_sll_append_~new_last~0#1.base| Int) (|v_ULTIMATE.start_sll_append_~last~0#1.offset_34| Int) (|ULTIMATE.start_sll_append_~new_last~0#1.offset| Int)) (= |c_ULTIMATE.start_main_~data~0#1| (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_#t~mem9#1.base|) (+ |c_ULTIMATE.start_sll_append_#t~mem9#1.offset| 4))) (.cse1 (+ |v_ULTIMATE.start_sll_append_~last~0#1.offset_34| 4))) (select (select (store |c_#memory_int| .cse0 (store (select |c_#memory_int| .cse0) .cse1 v_DerPreprocessor_24)) (select (select (store |c_#memory_$Pointer$.base| .cse0 (store (select |c_#memory_$Pointer$.base| .cse0) .cse1 |ULTIMATE.start_sll_append_~new_last~0#1.base|)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select (store |c_#memory_$Pointer$.offset| .cse0 (store (select |c_#memory_$Pointer$.offset| .cse0) .cse1 |ULTIMATE.start_sll_append_~new_last~0#1.offset|)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) is different from false [2021-11-20 07:28:26,362 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_24 Int) (|ULTIMATE.start_sll_append_~new_last~0#1.base| Int) (|v_ULTIMATE.start_sll_append_~last~0#1.offset_34| Int) (|ULTIMATE.start_sll_append_~new_last~0#1.offset| Int)) (= (let ((.cse0 (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|)) (+ (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|) 4))) (.cse1 (+ |v_ULTIMATE.start_sll_append_~last~0#1.offset_34| 4))) (select (select (store |c_#memory_int| .cse0 (store (select |c_#memory_int| .cse0) .cse1 v_DerPreprocessor_24)) (select (select (store |c_#memory_$Pointer$.base| .cse0 (store (select |c_#memory_$Pointer$.base| .cse0) .cse1 |ULTIMATE.start_sll_append_~new_last~0#1.base|)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select (store |c_#memory_$Pointer$.offset| .cse0 (store (select |c_#memory_$Pointer$.offset| .cse0) .cse1 |ULTIMATE.start_sll_append_~new_last~0#1.offset|)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) |c_ULTIMATE.start_main_~data~0#1|)) is different from false [2021-11-20 07:28:29,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095590098] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:28:29,903 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:28:29,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 32] total 65 [2021-11-20 07:28:29,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900127956] [2021-11-20 07:28:29,903 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:28:29,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-11-20 07:28:29,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:28:29,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-11-20 07:28:29,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=4580, Unknown=44, NotChecked=556, Total=5402 [2021-11-20 07:28:29,905 INFO L87 Difference]: Start difference. First operand 103 states and 115 transitions. Second operand has 65 states, 63 states have (on average 1.6825396825396826) internal successors, (106), 57 states have internal predecessors, (106), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6)