./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label03.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7e70badd Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abd587-cda9-463a-8820-4f3ba695a47c/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abd587-cda9-463a-8820-4f3ba695a47c/bin/uautomizer-wIGwrQj20G/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abd587-cda9-463a-8820-4f3ba695a47c/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abd587-cda9-463a-8820-4f3ba695a47c/bin/uautomizer-wIGwrQj20G/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label03.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abd587-cda9-463a-8820-4f3ba695a47c/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abd587-cda9-463a-8820-4f3ba695a47c/bin/uautomizer-wIGwrQj20G --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 355322de5dcfb8cbd44ad690b6b14768d5a2fa38ff5dfd1ede94c260e278eb8b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 12:19:16,747 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 12:19:16,751 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 12:19:16,796 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 12:19:16,797 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 12:19:16,802 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 12:19:16,804 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 12:19:16,805 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 12:19:16,808 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 12:19:16,809 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 12:19:16,811 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 12:19:16,812 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 12:19:16,813 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 12:19:16,814 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 12:19:16,816 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 12:19:16,818 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 12:19:16,819 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 12:19:16,821 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 12:19:16,824 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 12:19:16,827 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 12:19:16,830 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 12:19:16,832 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 12:19:16,834 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 12:19:16,835 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 12:19:16,840 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 12:19:16,841 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 12:19:16,841 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 12:19:16,843 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 12:19:16,844 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 12:19:16,845 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 12:19:16,846 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 12:19:16,847 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 12:19:16,848 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 12:19:16,850 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 12:19:16,851 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 12:19:16,852 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 12:19:16,853 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 12:19:16,854 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 12:19:16,854 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 12:19:16,856 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 12:19:16,857 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 12:19:16,859 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abd587-cda9-463a-8820-4f3ba695a47c/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-23 12:19:16,891 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 12:19:16,891 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 12:19:16,892 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 12:19:16,892 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 12:19:16,893 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 12:19:16,894 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 12:19:16,894 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 12:19:16,895 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 12:19:16,895 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 12:19:16,895 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 12:19:16,896 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 12:19:16,896 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 12:19:16,896 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 12:19:16,897 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 12:19:16,897 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 12:19:16,898 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 12:19:16,898 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 12:19:16,898 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 12:19:16,899 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 12:19:16,899 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 12:19:16,899 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 12:19:16,900 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 12:19:16,900 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 12:19:16,901 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 12:19:16,901 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 12:19:16,901 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 12:19:16,902 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-23 12:19:16,902 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 12:19:16,902 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-23 12:19:16,903 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-23 12:19:16,903 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 12:19:16,904 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 12:19:16,904 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_19abd587-cda9-463a-8820-4f3ba695a47c/bin/uautomizer-wIGwrQj20G/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abd587-cda9-463a-8820-4f3ba695a47c/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 355322de5dcfb8cbd44ad690b6b14768d5a2fa38ff5dfd1ede94c260e278eb8b [2021-11-23 12:19:17,222 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 12:19:17,255 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 12:19:17,258 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 12:19:17,260 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 12:19:17,261 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 12:19:17,263 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abd587-cda9-463a-8820-4f3ba695a47c/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label03.c [2021-11-23 12:19:17,357 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abd587-cda9-463a-8820-4f3ba695a47c/bin/uautomizer-wIGwrQj20G/data/7a6b94b77/080cfe09fbe24524b962b5ec88a0e524/FLAG5b8c90014 [2021-11-23 12:19:18,265 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 12:19:18,265 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abd587-cda9-463a-8820-4f3ba695a47c/sv-benchmarks/c/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label03.c [2021-11-23 12:19:18,302 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abd587-cda9-463a-8820-4f3ba695a47c/bin/uautomizer-wIGwrQj20G/data/7a6b94b77/080cfe09fbe24524b962b5ec88a0e524/FLAG5b8c90014 [2021-11-23 12:19:18,758 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abd587-cda9-463a-8820-4f3ba695a47c/bin/uautomizer-wIGwrQj20G/data/7a6b94b77/080cfe09fbe24524b962b5ec88a0e524 [2021-11-23 12:19:18,761 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 12:19:18,763 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 12:19:18,766 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 12:19:18,766 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 12:19:18,770 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 12:19:18,772 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:19:18" (1/1) ... [2021-11-23 12:19:18,773 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5303e6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:19:18, skipping insertion in model container [2021-11-23 12:19:18,773 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:19:18" (1/1) ... [2021-11-23 12:19:18,782 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 12:19:18,966 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 12:19:19,465 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_19abd587-cda9-463a-8820-4f3ba695a47c/sv-benchmarks/c/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label03.c[8616,8629] [2021-11-23 12:19:19,507 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_19abd587-cda9-463a-8820-4f3ba695a47c/sv-benchmarks/c/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label03.c[10953,10966] [2021-11-23 12:19:20,812 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 12:19:20,824 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 12:19:20,875 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_19abd587-cda9-463a-8820-4f3ba695a47c/sv-benchmarks/c/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label03.c[8616,8629] [2021-11-23 12:19:20,882 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_19abd587-cda9-463a-8820-4f3ba695a47c/sv-benchmarks/c/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label03.c[10953,10966] [2021-11-23 12:19:21,747 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 12:19:21,791 INFO L208 MainTranslator]: Completed translation [2021-11-23 12:19:21,791 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:19:21 WrapperNode [2021-11-23 12:19:21,791 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 12:19:21,793 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 12:19:21,793 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 12:19:21,793 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 12:19:21,803 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:19:21" (1/1) ... [2021-11-23 12:19:21,881 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:19:21" (1/1) ... [2021-11-23 12:19:22,413 INFO L137 Inliner]: procedures = 34, calls = 20, calls flagged for inlining = 15, calls inlined = 15, statements flattened = 5031 [2021-11-23 12:19:22,414 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 12:19:22,415 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 12:19:22,415 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 12:19:22,415 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 12:19:22,426 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:19:21" (1/1) ... [2021-11-23 12:19:22,426 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:19:21" (1/1) ... [2021-11-23 12:19:22,498 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:19:21" (1/1) ... [2021-11-23 12:19:22,500 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:19:21" (1/1) ... [2021-11-23 12:19:22,773 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:19:21" (1/1) ... [2021-11-23 12:19:22,876 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:19:21" (1/1) ... [2021-11-23 12:19:22,915 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:19:21" (1/1) ... [2021-11-23 12:19:23,031 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 12:19:23,034 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 12:19:23,035 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 12:19:23,035 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 12:19:23,036 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:19:21" (1/1) ... [2021-11-23 12:19:23,059 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 12:19:23,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abd587-cda9-463a-8820-4f3ba695a47c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:19:23,099 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abd587-cda9-463a-8820-4f3ba695a47c/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 12:19:23,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abd587-cda9-463a-8820-4f3ba695a47c/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 12:19:23,167 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 12:19:23,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 12:19:23,167 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 12:19:23,167 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 12:19:23,362 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 12:19:23,364 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 12:19:28,917 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 12:19:28,939 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 12:19:28,939 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-23 12:19:28,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:19:28 BoogieIcfgContainer [2021-11-23 12:19:28,943 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 12:19:28,945 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 12:19:28,945 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 12:19:28,949 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 12:19:28,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 12:19:18" (1/3) ... [2021-11-23 12:19:28,950 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d3b7313 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:19:28, skipping insertion in model container [2021-11-23 12:19:28,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:19:21" (2/3) ... [2021-11-23 12:19:28,951 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d3b7313 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:19:28, skipping insertion in model container [2021-11-23 12:19:28,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:19:28" (3/3) ... [2021-11-23 12:19:28,953 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label03.c [2021-11-23 12:19:28,958 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 12:19:28,959 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-23 12:19:29,027 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 12:19:29,036 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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 [2021-11-23 12:19:29,036 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-23 12:19:29,083 INFO L276 IsEmpty]: Start isEmpty. Operand has 893 states, 890 states have (on average 1.902247191011236) internal successors, (1693), 892 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:19:29,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 12:19:29,095 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:19:29,096 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:19:29,097 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:19:29,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:19:29,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1736774821, now seen corresponding path program 1 times [2021-11-23 12:19:29,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:19:29,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334171215] [2021-11-23 12:19:29,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:19:29,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:19:29,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:19:29,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:19:29,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:19:29,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334171215] [2021-11-23 12:19:29,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334171215] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:19:29,378 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:19:29,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 12:19:29,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002823798] [2021-11-23 12:19:29,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:19:29,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:19:29,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:19:29,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:19:29,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:19:29,445 INFO L87 Difference]: Start difference. First operand has 893 states, 890 states have (on average 1.902247191011236) internal successors, (1693), 892 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:19:35,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:19:35,153 INFO L93 Difference]: Finished difference Result 2528 states and 4850 transitions. [2021-11-23 12:19:35,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:19:35,156 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-23 12:19:35,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:19:35,200 INFO L225 Difference]: With dead ends: 2528 [2021-11-23 12:19:35,201 INFO L226 Difference]: Without dead ends: 1578 [2021-11-23 12:19:35,213 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 [2021-11-23 12:19:35,221 INFO L933 BasicCegarLoop]: 640 mSDtfsCounter, 925 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 2337 mSolverCounterSat, 696 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 925 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 3033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 696 IncrementalHoareTripleChecker+Valid, 2337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-11-23 12:19:35,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [925 Valid, 651 Invalid, 3033 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [696 Valid, 2337 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2021-11-23 12:19:35,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1578 states. [2021-11-23 12:19:35,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1578 to 1578. [2021-11-23 12:19:35,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1578 states, 1576 states have (on average 1.611040609137056) internal successors, (2539), 1577 states have internal predecessors, (2539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:19:35,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1578 states to 1578 states and 2539 transitions. [2021-11-23 12:19:35,405 INFO L78 Accepts]: Start accepts. Automaton has 1578 states and 2539 transitions. Word has length 20 [2021-11-23 12:19:35,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:19:35,405 INFO L470 AbstractCegarLoop]: Abstraction has 1578 states and 2539 transitions. [2021-11-23 12:19:35,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:19:35,406 INFO L276 IsEmpty]: Start isEmpty. Operand 1578 states and 2539 transitions. [2021-11-23 12:19:35,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-23 12:19:35,408 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:19:35,408 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:19:35,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 12:19:35,409 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:19:35,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:19:35,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1541863076, now seen corresponding path program 1 times [2021-11-23 12:19:35,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:19:35,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400169039] [2021-11-23 12:19:35,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:19:35,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:19:35,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:19:35,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:19:35,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:19:35,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400169039] [2021-11-23 12:19:35,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400169039] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:19:35,507 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:19:35,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 12:19:35,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128955490] [2021-11-23 12:19:35,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:19:35,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 12:19:35,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:19:35,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 12:19:35,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:19:35,511 INFO L87 Difference]: Start difference. First operand 1578 states and 2539 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:19:35,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:19:35,631 INFO L93 Difference]: Finished difference Result 1670 states and 2681 transitions. [2021-11-23 12:19:35,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 12:19:35,631 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-23 12:19:35,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:19:35,644 INFO L225 Difference]: With dead ends: 1670 [2021-11-23 12:19:35,644 INFO L226 Difference]: Without dead ends: 1622 [2021-11-23 12:19:35,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 12:19:35,653 INFO L933 BasicCegarLoop]: 1556 mSDtfsCounter, 71 mSDsluCounter, 4640 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 6196 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:19:35,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 6196 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:19:35,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1622 states. [2021-11-23 12:19:35,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1622 to 1578. [2021-11-23 12:19:35,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1578 states, 1576 states have (on average 1.5964467005076142) internal successors, (2516), 1577 states have internal predecessors, (2516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:19:35,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1578 states to 1578 states and 2516 transitions. [2021-11-23 12:19:35,723 INFO L78 Accepts]: Start accepts. Automaton has 1578 states and 2516 transitions. Word has length 30 [2021-11-23 12:19:35,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:19:35,724 INFO L470 AbstractCegarLoop]: Abstraction has 1578 states and 2516 transitions. [2021-11-23 12:19:35,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:19:35,724 INFO L276 IsEmpty]: Start isEmpty. Operand 1578 states and 2516 transitions. [2021-11-23 12:19:35,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-23 12:19:35,735 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:19:35,736 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:19:35,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 12:19:35,740 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:19:35,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:19:35,741 INFO L85 PathProgramCache]: Analyzing trace with hash 159296799, now seen corresponding path program 1 times [2021-11-23 12:19:35,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:19:35,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436546150] [2021-11-23 12:19:35,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:19:35,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:19:35,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:19:35,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:19:35,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:19:35,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436546150] [2021-11-23 12:19:35,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436546150] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:19:35,923 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:19:35,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:19:35,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521802301] [2021-11-23 12:19:35,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:19:35,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:19:35,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:19:35,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:19:35,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:19:35,925 INFO L87 Difference]: Start difference. First operand 1578 states and 2516 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:19:35,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:19:35,978 INFO L93 Difference]: Finished difference Result 1660 states and 2644 transitions. [2021-11-23 12:19:35,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:19:35,979 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-23 12:19:35,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:19:35,991 INFO L225 Difference]: With dead ends: 1660 [2021-11-23 12:19:35,992 INFO L226 Difference]: Without dead ends: 1616 [2021-11-23 12:19:35,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:19:36,003 INFO L933 BasicCegarLoop]: 1592 mSDtfsCounter, 1498 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1498 SdHoareTripleChecker+Valid, 1659 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:19:36,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1498 Valid, 1659 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:19:36,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1616 states. [2021-11-23 12:19:36,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1616 to 1614. [2021-11-23 12:19:36,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1614 states, 1612 states have (on average 1.5961538461538463) internal successors, (2573), 1613 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:19:36,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1614 states to 1614 states and 2573 transitions. [2021-11-23 12:19:36,068 INFO L78 Accepts]: Start accepts. Automaton has 1614 states and 2573 transitions. Word has length 52 [2021-11-23 12:19:36,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:19:36,070 INFO L470 AbstractCegarLoop]: Abstraction has 1614 states and 2573 transitions. [2021-11-23 12:19:36,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:19:36,070 INFO L276 IsEmpty]: Start isEmpty. Operand 1614 states and 2573 transitions. [2021-11-23 12:19:36,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-23 12:19:36,075 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:19:36,076 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:19:36,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 12:19:36,076 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:19:36,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:19:36,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1780734059, now seen corresponding path program 1 times [2021-11-23 12:19:36,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:19:36,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562607282] [2021-11-23 12:19:36,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:19:36,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:19:36,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:19:36,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:19:36,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:19:36,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562607282] [2021-11-23 12:19:36,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562607282] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:19:36,209 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:19:36,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:19:36,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650553221] [2021-11-23 12:19:36,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:19:36,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:19:36,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:19:36,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:19:36,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:19:36,213 INFO L87 Difference]: Start difference. First operand 1614 states and 2573 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:19:36,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:19:36,269 INFO L93 Difference]: Finished difference Result 1762 states and 2805 transitions. [2021-11-23 12:19:36,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:19:36,270 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-23 12:19:36,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:19:36,284 INFO L225 Difference]: With dead ends: 1762 [2021-11-23 12:19:36,284 INFO L226 Difference]: Without dead ends: 1682 [2021-11-23 12:19:36,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:19:36,297 INFO L933 BasicCegarLoop]: 1587 mSDtfsCounter, 1494 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1494 SdHoareTripleChecker+Valid, 1658 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:19:36,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1494 Valid, 1658 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:19:36,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1682 states. [2021-11-23 12:19:36,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1682 to 1680. [2021-11-23 12:19:36,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1680 states, 1678 states have (on average 1.594755661501788) internal successors, (2676), 1679 states have internal predecessors, (2676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:19:36,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 2676 transitions. [2021-11-23 12:19:36,375 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 2676 transitions. Word has length 52 [2021-11-23 12:19:36,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:19:36,376 INFO L470 AbstractCegarLoop]: Abstraction has 1680 states and 2676 transitions. [2021-11-23 12:19:36,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:19:36,377 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 2676 transitions. [2021-11-23 12:19:36,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-23 12:19:36,378 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:19:36,379 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:19:36,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 12:19:36,379 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:19:36,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:19:36,381 INFO L85 PathProgramCache]: Analyzing trace with hash 919948555, now seen corresponding path program 1 times [2021-11-23 12:19:36,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:19:36,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919516790] [2021-11-23 12:19:36,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:19:36,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:19:36,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:19:36,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:19:36,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:19:36,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919516790] [2021-11-23 12:19:36,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919516790] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:19:36,480 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:19:36,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:19:36,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761802815] [2021-11-23 12:19:36,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:19:36,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:19:36,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:19:36,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:19:36,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:19:36,482 INFO L87 Difference]: Start difference. First operand 1680 states and 2676 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:19:36,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:19:36,538 INFO L93 Difference]: Finished difference Result 1948 states and 3094 transitions. [2021-11-23 12:19:36,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:19:36,539 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-23 12:19:36,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:19:36,552 INFO L225 Difference]: With dead ends: 1948 [2021-11-23 12:19:36,552 INFO L226 Difference]: Without dead ends: 1802 [2021-11-23 12:19:36,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:19:36,554 INFO L933 BasicCegarLoop]: 1582 mSDtfsCounter, 1490 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1490 SdHoareTripleChecker+Valid, 1657 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:19:36,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1490 Valid, 1657 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:19:36,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1802 states. [2021-11-23 12:19:36,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1802 to 1800. [2021-11-23 12:19:36,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1800 states, 1798 states have (on average 1.5906562847608454) internal successors, (2860), 1799 states have internal predecessors, (2860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:19:36,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1800 states to 1800 states and 2860 transitions. [2021-11-23 12:19:36,731 INFO L78 Accepts]: Start accepts. Automaton has 1800 states and 2860 transitions. Word has length 52 [2021-11-23 12:19:36,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:19:36,733 INFO L470 AbstractCegarLoop]: Abstraction has 1800 states and 2860 transitions. [2021-11-23 12:19:36,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:19:36,738 INFO L276 IsEmpty]: Start isEmpty. Operand 1800 states and 2860 transitions. [2021-11-23 12:19:36,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-23 12:19:36,740 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:19:36,740 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:19:36,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 12:19:36,742 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:19:36,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:19:36,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1515907135, now seen corresponding path program 1 times [2021-11-23 12:19:36,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:19:36,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833376583] [2021-11-23 12:19:36,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:19:36,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:19:36,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:19:36,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:19:36,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:19:36,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833376583] [2021-11-23 12:19:36,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833376583] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:19:36,824 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:19:36,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:19:36,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585342599] [2021-11-23 12:19:36,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:19:36,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:19:36,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:19:36,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:19:36,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:19:36,826 INFO L87 Difference]: Start difference. First operand 1800 states and 2860 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:19:36,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:19:36,892 INFO L93 Difference]: Finished difference Result 2284 states and 3606 transitions. [2021-11-23 12:19:36,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:19:36,893 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-23 12:19:36,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:19:36,908 INFO L225 Difference]: With dead ends: 2284 [2021-11-23 12:19:36,908 INFO L226 Difference]: Without dead ends: 2018 [2021-11-23 12:19:36,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:19:36,911 INFO L933 BasicCegarLoop]: 1577 mSDtfsCounter, 1486 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1486 SdHoareTripleChecker+Valid, 1656 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:19:36,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1486 Valid, 1656 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:19:36,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2018 states. [2021-11-23 12:19:36,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2018 to 2016. [2021-11-23 12:19:36,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2016 states, 2014 states have (on average 1.5809334657398213) internal successors, (3184), 2015 states have internal predecessors, (3184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:19:36,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2016 states to 2016 states and 3184 transitions. [2021-11-23 12:19:36,998 INFO L78 Accepts]: Start accepts. Automaton has 2016 states and 3184 transitions. Word has length 52 [2021-11-23 12:19:36,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:19:36,998 INFO L470 AbstractCegarLoop]: Abstraction has 2016 states and 3184 transitions. [2021-11-23 12:19:36,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:19:36,999 INFO L276 IsEmpty]: Start isEmpty. Operand 2016 states and 3184 transitions. [2021-11-23 12:19:37,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-23 12:19:37,000 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:19:37,000 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:19:37,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 12:19:37,001 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:19:37,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:19:37,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1924545907, now seen corresponding path program 1 times [2021-11-23 12:19:37,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:19:37,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67280705] [2021-11-23 12:19:37,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:19:37,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:19:37,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:19:37,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:19:37,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:19:37,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67280705] [2021-11-23 12:19:37,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67280705] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:19:37,094 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:19:37,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 12:19:37,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662106200] [2021-11-23 12:19:37,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:19:37,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 12:19:37,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:19:37,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 12:19:37,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 12:19:37,096 INFO L87 Difference]: Start difference. First operand 2016 states and 3184 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:19:37,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:19:37,495 INFO L93 Difference]: Finished difference Result 5872 states and 9080 transitions. [2021-11-23 12:19:37,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 12:19:37,496 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-23 12:19:37,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:19:37,536 INFO L225 Difference]: With dead ends: 5872 [2021-11-23 12:19:37,536 INFO L226 Difference]: Without dead ends: 5390 [2021-11-23 12:19:37,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-23 12:19:37,544 INFO L933 BasicCegarLoop]: 1531 mSDtfsCounter, 6521 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6521 SdHoareTripleChecker+Valid, 2068 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:19:37,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6521 Valid, 2068 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:19:37,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5390 states. [2021-11-23 12:19:37,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5390 to 2496. [2021-11-23 12:19:37,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2496 states, 2494 states have (on average 1.5589414595028068) internal successors, (3888), 2495 states have internal predecessors, (3888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:19:37,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2496 states to 2496 states and 3888 transitions. [2021-11-23 12:19:37,728 INFO L78 Accepts]: Start accepts. Automaton has 2496 states and 3888 transitions. Word has length 52 [2021-11-23 12:19:37,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:19:37,729 INFO L470 AbstractCegarLoop]: Abstraction has 2496 states and 3888 transitions. [2021-11-23 12:19:37,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:19:37,730 INFO L276 IsEmpty]: Start isEmpty. Operand 2496 states and 3888 transitions. [2021-11-23 12:19:37,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-23 12:19:37,730 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:19:37,731 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:19:37,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 12:19:37,731 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:19:37,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:19:37,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1236981091, now seen corresponding path program 1 times [2021-11-23 12:19:37,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:19:37,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241106965] [2021-11-23 12:19:37,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:19:37,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:19:37,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:19:37,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:19:37,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:19:37,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241106965] [2021-11-23 12:19:37,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241106965] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:19:37,821 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:19:37,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:19:37,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737762649] [2021-11-23 12:19:37,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:19:37,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:19:37,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:19:37,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:19:37,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:19:37,823 INFO L87 Difference]: Start difference. First operand 2496 states and 3888 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:19:37,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:19:37,964 INFO L93 Difference]: Finished difference Result 3902 states and 5988 transitions. [2021-11-23 12:19:37,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:19:37,964 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-23 12:19:37,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:19:37,987 INFO L225 Difference]: With dead ends: 3902 [2021-11-23 12:19:37,987 INFO L226 Difference]: Without dead ends: 2940 [2021-11-23 12:19:37,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:19:37,991 INFO L933 BasicCegarLoop]: 1559 mSDtfsCounter, 1478 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1478 SdHoareTripleChecker+Valid, 1623 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:19:37,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1478 Valid, 1623 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:19:37,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2940 states. [2021-11-23 12:19:38,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2940 to 2938. [2021-11-23 12:19:38,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2938 states, 2936 states have (on average 1.5401907356948228) internal successors, (4522), 2937 states have internal predecessors, (4522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:19:38,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 4522 transitions. [2021-11-23 12:19:38,164 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 4522 transitions. Word has length 54 [2021-11-23 12:19:38,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:19:38,166 INFO L470 AbstractCegarLoop]: Abstraction has 2938 states and 4522 transitions. [2021-11-23 12:19:38,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:19:38,166 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 4522 transitions. [2021-11-23 12:19:38,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-23 12:19:38,167 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:19:38,167 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:19:38,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 12:19:38,170 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:19:38,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:19:38,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1303474603, now seen corresponding path program 1 times [2021-11-23 12:19:38,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:19:38,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881570496] [2021-11-23 12:19:38,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:19:38,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:19:38,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:19:38,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:19:38,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:19:38,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881570496] [2021-11-23 12:19:38,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881570496] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:19:38,376 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:19:38,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 12:19:38,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396807283] [2021-11-23 12:19:38,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:19:38,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 12:19:38,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:19:38,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 12:19:38,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-23 12:19:38,380 INFO L87 Difference]: Start difference. First operand 2938 states and 4522 transitions. Second operand has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:19:38,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:19:38,706 INFO L93 Difference]: Finished difference Result 4342 states and 6596 transitions. [2021-11-23 12:19:38,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 12:19:38,706 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-23 12:19:38,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:19:38,728 INFO L225 Difference]: With dead ends: 4342 [2021-11-23 12:19:38,728 INFO L226 Difference]: Without dead ends: 2940 [2021-11-23 12:19:38,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-11-23 12:19:38,734 INFO L933 BasicCegarLoop]: 1531 mSDtfsCounter, 6036 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6036 SdHoareTripleChecker+Valid, 1726 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:19:38,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6036 Valid, 1726 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:19:38,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2940 states. [2021-11-23 12:19:38,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2940 to 2938. [2021-11-23 12:19:38,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2938 states, 2936 states have (on average 1.5320163487738419) internal successors, (4498), 2937 states have internal predecessors, (4498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:19:38,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 4498 transitions. [2021-11-23 12:19:38,904 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 4498 transitions. Word has length 54 [2021-11-23 12:19:38,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:19:38,905 INFO L470 AbstractCegarLoop]: Abstraction has 2938 states and 4498 transitions. [2021-11-23 12:19:38,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:19:38,905 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 4498 transitions. [2021-11-23 12:19:38,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-23 12:19:38,906 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:19:38,906 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:19:38,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 12:19:38,907 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:19:38,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:19:38,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1338283904, now seen corresponding path program 1 times [2021-11-23 12:19:38,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:19:38,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876425522] [2021-11-23 12:19:38,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:19:38,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:19:38,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:19:39,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:19:39,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:19:39,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876425522] [2021-11-23 12:19:39,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876425522] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:19:39,012 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:19:39,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 12:19:39,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424823871] [2021-11-23 12:19:39,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:19:39,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 12:19:39,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:19:39,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 12:19:39,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 12:19:39,014 INFO L87 Difference]: Start difference. First operand 2938 states and 4498 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:19:39,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:19:39,283 INFO L93 Difference]: Finished difference Result 4340 states and 6547 transitions. [2021-11-23 12:19:39,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 12:19:39,283 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-23 12:19:39,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:19:39,325 INFO L225 Difference]: With dead ends: 4340 [2021-11-23 12:19:39,333 INFO L226 Difference]: Without dead ends: 2938 [2021-11-23 12:19:39,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-23 12:19:39,338 INFO L933 BasicCegarLoop]: 1503 mSDtfsCounter, 4595 mSDsluCounter, 1474 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4595 SdHoareTripleChecker+Valid, 2977 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:19:39,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4595 Valid, 2977 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:19:39,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2938 states. [2021-11-23 12:19:39,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2938 to 2938. [2021-11-23 12:19:39,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2938 states, 2936 states have (on average 1.5238419618528611) internal successors, (4474), 2937 states have internal predecessors, (4474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:19:39,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 4474 transitions. [2021-11-23 12:19:39,530 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 4474 transitions. Word has length 55 [2021-11-23 12:19:39,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:19:39,530 INFO L470 AbstractCegarLoop]: Abstraction has 2938 states and 4474 transitions. [2021-11-23 12:19:39,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:19:39,531 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 4474 transitions. [2021-11-23 12:19:39,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-23 12:19:39,531 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:19:39,532 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:19:39,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 12:19:39,533 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:19:39,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:19:39,533 INFO L85 PathProgramCache]: Analyzing trace with hash 637219326, now seen corresponding path program 1 times [2021-11-23 12:19:39,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:19:39,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281033702] [2021-11-23 12:19:39,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:19:39,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:19:39,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:19:39,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:19:39,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:19:39,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281033702] [2021-11-23 12:19:39,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281033702] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:19:39,634 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:19:39,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 12:19:39,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958599376] [2021-11-23 12:19:39,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:19:39,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 12:19:39,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:19:39,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 12:19:39,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 12:19:39,637 INFO L87 Difference]: Start difference. First operand 2938 states and 4474 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:19:39,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:19:39,902 INFO L93 Difference]: Finished difference Result 4340 states and 6499 transitions. [2021-11-23 12:19:39,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 12:19:39,903 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-23 12:19:39,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:19:39,913 INFO L225 Difference]: With dead ends: 4340 [2021-11-23 12:19:39,913 INFO L226 Difference]: Without dead ends: 2938 [2021-11-23 12:19:39,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-23 12:19:39,917 INFO L933 BasicCegarLoop]: 1505 mSDtfsCounter, 4627 mSDsluCounter, 1477 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4627 SdHoareTripleChecker+Valid, 2982 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:19:39,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4627 Valid, 2982 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:19:39,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2938 states. [2021-11-23 12:19:40,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2938 to 2938. [2021-11-23 12:19:40,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2938 states, 2936 states have (on average 1.5156675749318802) internal successors, (4450), 2937 states have internal predecessors, (4450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:19:40,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 4450 transitions. [2021-11-23 12:19:40,139 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 4450 transitions. Word has length 55 [2021-11-23 12:19:40,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:19:40,140 INFO L470 AbstractCegarLoop]: Abstraction has 2938 states and 4450 transitions. [2021-11-23 12:19:40,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:19:40,140 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 4450 transitions. [2021-11-23 12:19:40,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-23 12:19:40,141 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:19:40,141 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:19:40,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 12:19:40,142 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:19:40,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:19:40,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1917083004, now seen corresponding path program 1 times [2021-11-23 12:19:40,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:19:40,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919009996] [2021-11-23 12:19:40,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:19:40,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:19:40,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:19:40,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:19:40,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:19:40,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919009996] [2021-11-23 12:19:40,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919009996] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:19:40,224 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:19:40,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 12:19:40,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786273739] [2021-11-23 12:19:40,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:19:40,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 12:19:40,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:19:40,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 12:19:40,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:19:40,226 INFO L87 Difference]: Start difference. First operand 2938 states and 4450 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:19:40,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:19:40,636 INFO L93 Difference]: Finished difference Result 4169 states and 6148 transitions. [2021-11-23 12:19:40,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 12:19:40,637 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-23 12:19:40,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:19:40,649 INFO L225 Difference]: With dead ends: 4169 [2021-11-23 12:19:40,650 INFO L226 Difference]: Without dead ends: 4167 [2021-11-23 12:19:40,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 12:19:40,653 INFO L933 BasicCegarLoop]: 1555 mSDtfsCounter, 172 mSDsluCounter, 4598 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 6153 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:19:40,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 6153 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:19:40,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4167 states. [2021-11-23 12:19:40,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4167 to 3034. [2021-11-23 12:19:40,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3034 states, 3032 states have (on average 1.4967018469656992) internal successors, (4538), 3033 states have internal predecessors, (4538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:19:40,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3034 states to 3034 states and 4538 transitions. [2021-11-23 12:19:40,924 INFO L78 Accepts]: Start accepts. Automaton has 3034 states and 4538 transitions. Word has length 55 [2021-11-23 12:19:40,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:19:40,925 INFO L470 AbstractCegarLoop]: Abstraction has 3034 states and 4538 transitions. [2021-11-23 12:19:40,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:19:40,926 INFO L276 IsEmpty]: Start isEmpty. Operand 3034 states and 4538 transitions. [2021-11-23 12:19:40,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-23 12:19:40,933 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:19:40,933 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:19:40,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-23 12:19:40,934 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:19:40,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:19:40,935 INFO L85 PathProgramCache]: Analyzing trace with hash -484645446, now seen corresponding path program 1 times [2021-11-23 12:19:40,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:19:40,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266170416] [2021-11-23 12:19:40,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:19:40,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:19:40,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:19:41,043 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 12:19:41,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:19:41,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266170416] [2021-11-23 12:19:41,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266170416] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:19:41,044 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:19:41,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 12:19:41,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350889106] [2021-11-23 12:19:41,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:19:41,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 12:19:41,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:19:41,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 12:19:41,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 12:19:41,046 INFO L87 Difference]: Start difference. First operand 3034 states and 4538 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:19:41,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:19:41,884 INFO L93 Difference]: Finished difference Result 9340 states and 13307 transitions. [2021-11-23 12:19:41,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 12:19:41,885 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-23 12:19:41,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:19:41,908 INFO L225 Difference]: With dead ends: 9340 [2021-11-23 12:19:41,908 INFO L226 Difference]: Without dead ends: 7842 [2021-11-23 12:19:41,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-23 12:19:41,915 INFO L933 BasicCegarLoop]: 1592 mSDtfsCounter, 4749 mSDsluCounter, 1748 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4749 SdHoareTripleChecker+Valid, 3340 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:19:41,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4749 Valid, 3340 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:19:41,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7842 states. [2021-11-23 12:19:42,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7842 to 4530. [2021-11-23 12:19:42,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4530 states, 4528 states have (on average 1.4580388692579505) internal successors, (6602), 4529 states have internal predecessors, (6602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:19:42,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4530 states to 4530 states and 6602 transitions. [2021-11-23 12:19:42,393 INFO L78 Accepts]: Start accepts. Automaton has 4530 states and 6602 transitions. Word has length 79 [2021-11-23 12:19:42,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:19:42,393 INFO L470 AbstractCegarLoop]: Abstraction has 4530 states and 6602 transitions. [2021-11-23 12:19:42,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:19:42,394 INFO L276 IsEmpty]: Start isEmpty. Operand 4530 states and 6602 transitions. [2021-11-23 12:19:42,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-23 12:19:42,397 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:19:42,397 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:19:42,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-23 12:19:42,397 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:19:42,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:19:42,398 INFO L85 PathProgramCache]: Analyzing trace with hash 2041539034, now seen corresponding path program 1 times [2021-11-23 12:19:42,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:19:42,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457740937] [2021-11-23 12:19:42,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:19:42,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:19:42,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:19:42,490 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 12:19:42,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:19:42,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457740937] [2021-11-23 12:19:42,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457740937] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:19:42,491 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:19:42,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 12:19:42,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898138039] [2021-11-23 12:19:42,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:19:42,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 12:19:42,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:19:42,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 12:19:42,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 12:19:42,493 INFO L87 Difference]: Start difference. First operand 4530 states and 6602 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:19:43,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:19:43,300 INFO L93 Difference]: Finished difference Result 10836 states and 15371 transitions. [2021-11-23 12:19:43,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 12:19:43,300 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-23 12:19:43,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:19:43,328 INFO L225 Difference]: With dead ends: 10836 [2021-11-23 12:19:43,329 INFO L226 Difference]: Without dead ends: 9338 [2021-11-23 12:19:43,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-23 12:19:43,336 INFO L933 BasicCegarLoop]: 1592 mSDtfsCounter, 4708 mSDsluCounter, 1774 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4708 SdHoareTripleChecker+Valid, 3366 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:19:43,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4708 Valid, 3366 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:19:43,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9338 states. [2021-11-23 12:19:44,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9338 to 6778. [2021-11-23 12:19:44,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6778 states, 6776 states have (on average 1.42827626918536) internal successors, (9678), 6777 states have internal predecessors, (9678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:19:44,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6778 states to 6778 states and 9678 transitions. [2021-11-23 12:19:44,191 INFO L78 Accepts]: Start accepts. Automaton has 6778 states and 9678 transitions. Word has length 79 [2021-11-23 12:19:44,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:19:44,191 INFO L470 AbstractCegarLoop]: Abstraction has 6778 states and 9678 transitions. [2021-11-23 12:19:44,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:19:44,192 INFO L276 IsEmpty]: Start isEmpty. Operand 6778 states and 9678 transitions. [2021-11-23 12:19:44,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-23 12:19:44,195 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:19:44,195 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:19:44,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-23 12:19:44,196 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:19:44,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:19:44,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1121788422, now seen corresponding path program 1 times [2021-11-23 12:19:44,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:19:44,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816888968] [2021-11-23 12:19:44,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:19:44,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:19:44,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:19:44,273 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 12:19:44,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:19:44,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816888968] [2021-11-23 12:19:44,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816888968] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:19:44,274 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:19:44,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 12:19:44,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022182938] [2021-11-23 12:19:44,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:19:44,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 12:19:44,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:19:44,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 12:19:44,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 12:19:44,276 INFO L87 Difference]: Start difference. First operand 6778 states and 9678 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:19:45,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:19:45,164 INFO L93 Difference]: Finished difference Result 12332 states and 17435 transitions. [2021-11-23 12:19:45,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 12:19:45,165 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-23 12:19:45,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:19:45,195 INFO L225 Difference]: With dead ends: 12332 [2021-11-23 12:19:45,196 INFO L226 Difference]: Without dead ends: 10834 [2021-11-23 12:19:45,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-23 12:19:45,204 INFO L933 BasicCegarLoop]: 1593 mSDtfsCounter, 4738 mSDsluCounter, 1802 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4738 SdHoareTripleChecker+Valid, 3395 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:19:45,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4738 Valid, 3395 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:19:45,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10834 states. [2021-11-23 12:19:45,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10834 to 8274. [2021-11-23 12:19:45,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8274 states, 8272 states have (on average 1.4194874274661509) internal successors, (11742), 8273 states have internal predecessors, (11742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:19:46,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8274 states to 8274 states and 11742 transitions. [2021-11-23 12:19:46,017 INFO L78 Accepts]: Start accepts. Automaton has 8274 states and 11742 transitions. Word has length 79 [2021-11-23 12:19:46,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:19:46,017 INFO L470 AbstractCegarLoop]: Abstraction has 8274 states and 11742 transitions. [2021-11-23 12:19:46,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:19:46,018 INFO L276 IsEmpty]: Start isEmpty. Operand 8274 states and 11742 transitions. [2021-11-23 12:19:46,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-23 12:19:46,021 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:19:46,021 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:19:46,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-23 12:19:46,022 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:19:46,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:19:46,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1937719834, now seen corresponding path program 1 times [2021-11-23 12:19:46,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:19:46,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859748609] [2021-11-23 12:19:46,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:19:46,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:19:46,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:19:46,112 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 12:19:46,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:19:46,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859748609] [2021-11-23 12:19:46,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859748609] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:19:46,115 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:19:46,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 12:19:46,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199646065] [2021-11-23 12:19:46,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:19:46,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 12:19:46,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:19:46,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 12:19:46,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 12:19:46,118 INFO L87 Difference]: Start difference. First operand 8274 states and 11742 transitions. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:19:47,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:19:47,180 INFO L93 Difference]: Finished difference Result 12948 states and 18299 transitions. [2021-11-23 12:19:47,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 12:19:47,181 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-23 12:19:47,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:19:47,211 INFO L225 Difference]: With dead ends: 12948 [2021-11-23 12:19:47,212 INFO L226 Difference]: Without dead ends: 11890 [2021-11-23 12:19:47,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-23 12:19:47,218 INFO L933 BasicCegarLoop]: 1590 mSDtfsCounter, 4737 mSDsluCounter, 1756 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4737 SdHoareTripleChecker+Valid, 3346 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:19:47,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4737 Valid, 3346 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:19:47,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11890 states. [2021-11-23 12:19:48,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11890 to 9330. [2021-11-23 12:19:48,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9330 states, 9328 states have (on average 1.4165951972555746) internal successors, (13214), 9329 states have internal predecessors, (13214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:19:48,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9330 states to 9330 states and 13214 transitions. [2021-11-23 12:19:48,279 INFO L78 Accepts]: Start accepts. Automaton has 9330 states and 13214 transitions. Word has length 79 [2021-11-23 12:19:48,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:19:48,280 INFO L470 AbstractCegarLoop]: Abstraction has 9330 states and 13214 transitions. [2021-11-23 12:19:48,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:19:48,280 INFO L276 IsEmpty]: Start isEmpty. Operand 9330 states and 13214 transitions. [2021-11-23 12:19:48,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-23 12:19:48,285 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:19:48,285 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:19:48,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-23 12:19:48,286 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:19:48,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:19:48,287 INFO L85 PathProgramCache]: Analyzing trace with hash -596667294, now seen corresponding path program 1 times [2021-11-23 12:19:48,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:19:48,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379225208] [2021-11-23 12:19:48,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:19:48,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:19:48,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:19:48,673 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:19:48,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:19:48,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379225208] [2021-11-23 12:19:48,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379225208] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:19:48,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528410818] [2021-11-23 12:19:48,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:19:48,675 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:19:48,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abd587-cda9-463a-8820-4f3ba695a47c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:19:48,677 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abd587-cda9-463a-8820-4f3ba695a47c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:19:48,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abd587-cda9-463a-8820-4f3ba695a47c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 12:19:48,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:19:48,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-23 12:19:48,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:19:49,311 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:19:49,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:19:50,053 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:19:50,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528410818] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:19:50,054 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:19:50,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 6] total 23 [2021-11-23 12:19:50,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454808771] [2021-11-23 12:19:50,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:19:50,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-23 12:19:50,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:19:50,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-23 12:19:50,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-11-23 12:19:50,057 INFO L87 Difference]: Start difference. First operand 9330 states and 13214 transitions. Second operand has 23 states, 23 states have (on average 9.869565217391305) internal successors, (227), 23 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:20:14,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:20:14,550 INFO L93 Difference]: Finished difference Result 150816 states and 206638 transitions. [2021-11-23 12:20:14,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 258 states. [2021-11-23 12:20:14,550 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 9.869565217391305) internal successors, (227), 23 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-23 12:20:14,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:20:14,996 INFO L225 Difference]: With dead ends: 150816 [2021-11-23 12:20:14,997 INFO L226 Difference]: Without dead ends: 141762 [2021-11-23 12:20:15,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 276 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35111 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=9618, Invalid=67388, Unknown=0, NotChecked=0, Total=77006 [2021-11-23 12:20:15,332 INFO L933 BasicCegarLoop]: 1690 mSDtfsCounter, 25771 mSDsluCounter, 11026 mSDsCounter, 0 mSdLazyCounter, 4143 mSolverCounterSat, 813 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25771 SdHoareTripleChecker+Valid, 12716 SdHoareTripleChecker+Invalid, 4956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 813 IncrementalHoareTripleChecker+Valid, 4143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-11-23 12:20:15,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25771 Valid, 12716 Invalid, 4956 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [813 Valid, 4143 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2021-11-23 12:20:15,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141762 states. [2021-11-23 12:20:22,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141762 to 73605. [2021-11-23 12:20:22,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73605 states, 73603 states have (on average 1.3628928168688776) internal successors, (100313), 73604 states have internal predecessors, (100313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:20:22,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73605 states to 73605 states and 100313 transitions. [2021-11-23 12:20:22,328 INFO L78 Accepts]: Start accepts. Automaton has 73605 states and 100313 transitions. Word has length 80 [2021-11-23 12:20:22,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:20:22,328 INFO L470 AbstractCegarLoop]: Abstraction has 73605 states and 100313 transitions. [2021-11-23 12:20:22,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 9.869565217391305) internal successors, (227), 23 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:20:22,331 INFO L276 IsEmpty]: Start isEmpty. Operand 73605 states and 100313 transitions. [2021-11-23 12:20:22,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-23 12:20:22,576 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:20:22,576 INFO L514 BasicCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:20:22,644 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abd587-cda9-463a-8820-4f3ba695a47c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-23 12:20:22,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abd587-cda9-463a-8820-4f3ba695a47c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-23 12:20:22,777 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:20:22,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:20:22,778 INFO L85 PathProgramCache]: Analyzing trace with hash 2064719954, now seen corresponding path program 1 times [2021-11-23 12:20:22,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:20:22,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628348164] [2021-11-23 12:20:22,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:20:22,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:20:22,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:20:22,996 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:20:22,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:20:22,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628348164] [2021-11-23 12:20:22,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628348164] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:20:22,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329247779] [2021-11-23 12:20:22,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:20:22,997 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:20:22,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abd587-cda9-463a-8820-4f3ba695a47c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:20:22,999 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abd587-cda9-463a-8820-4f3ba695a47c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:20:23,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abd587-cda9-463a-8820-4f3ba695a47c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 12:20:23,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:20:23,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 12:20:23,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:20:24,121 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:20:24,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:20:24,983 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:20:24,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329247779] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:20:24,984 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:20:24,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2021-11-23 12:20:24,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165083583] [2021-11-23 12:20:24,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:20:24,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-23 12:20:24,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:20:24,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-23 12:20:24,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2021-11-23 12:20:24,987 INFO L87 Difference]: Start difference. First operand 73605 states and 100313 transitions. Second operand has 26 states, 26 states have (on average 7.884615384615385) internal successors, (205), 25 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)