./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.08.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38629ab8-bcab-495c-898c-20f2fd474d48/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38629ab8-bcab-495c-898c-20f2fd474d48/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38629ab8-bcab-495c-898c-20f2fd474d48/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38629ab8-bcab-495c-898c-20f2fd474d48/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.08.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38629ab8-bcab-495c-898c-20f2fd474d48/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38629ab8-bcab-495c-898c-20f2fd474d48/bin/uautomizer-YU5uOKAj3y --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 aaf13b6417c3a40bd252c0d41a10a8dacb34259e9c2292b8e82d477fe2508ef5 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:20:39,701 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:20:39,704 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:20:39,774 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:20:39,776 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:20:39,782 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:20:39,786 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:20:39,790 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:20:39,793 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:20:39,802 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:20:39,803 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:20:39,805 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:20:39,806 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:20:39,809 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:20:39,811 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:20:39,817 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:20:39,820 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:20:39,822 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:20:39,830 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:20:39,834 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:20:39,840 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:20:39,842 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:20:39,843 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:20:39,845 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:20:39,848 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:20:39,849 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:20:39,849 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:20:39,850 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:20:39,851 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:20:39,852 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:20:39,853 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:20:39,854 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:20:39,855 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:20:39,856 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:20:39,857 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:20:39,858 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:20:39,859 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:20:39,859 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:20:39,859 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:20:39,861 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:20:39,861 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:20:39,863 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38629ab8-bcab-495c-898c-20f2fd474d48/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-13 18:20:39,886 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:20:39,886 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:20:39,894 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:20:39,894 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:20:39,895 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:20:39,895 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:20:39,896 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:20:39,896 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:20:39,897 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:20:39,897 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:20:39,897 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 18:20:39,897 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 18:20:39,898 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 18:20:39,898 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:20:39,898 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 18:20:39,898 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:20:39,899 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 18:20:39,899 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 18:20:39,899 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 18:20:39,899 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:20:39,900 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 18:20:39,900 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:20:39,900 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:20:39,900 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:20:39,901 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:20:39,901 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:20:39,901 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:20:39,901 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 18:20:39,902 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 18:20:39,902 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 18:20:39,902 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 18:20:39,902 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 18:20:39,903 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 18:20:39,903 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:20:39,903 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_38629ab8-bcab-495c-898c-20f2fd474d48/bin/uautomizer-YU5uOKAj3y/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38629ab8-bcab-495c-898c-20f2fd474d48/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aaf13b6417c3a40bd252c0d41a10a8dacb34259e9c2292b8e82d477fe2508ef5 [2021-11-13 18:20:40,194 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:20:40,227 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:20:40,230 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:20:40,232 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:20:40,233 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:20:40,235 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38629ab8-bcab-495c-898c-20f2fd474d48/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.08.cil-2.c [2021-11-13 18:20:40,303 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38629ab8-bcab-495c-898c-20f2fd474d48/bin/uautomizer-YU5uOKAj3y/data/aad3f2660/7b64152a1ff54a3780304109d04323c5/FLAG879007413 [2021-11-13 18:20:41,513 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:20:41,514 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38629ab8-bcab-495c-898c-20f2fd474d48/sv-benchmarks/c/combinations/Problem05_label49+token_ring.08.cil-2.c [2021-11-13 18:20:41,584 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38629ab8-bcab-495c-898c-20f2fd474d48/bin/uautomizer-YU5uOKAj3y/data/aad3f2660/7b64152a1ff54a3780304109d04323c5/FLAG879007413 [2021-11-13 18:20:41,700 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38629ab8-bcab-495c-898c-20f2fd474d48/bin/uautomizer-YU5uOKAj3y/data/aad3f2660/7b64152a1ff54a3780304109d04323c5 [2021-11-13 18:20:41,703 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:20:41,705 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 18:20:41,707 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:20:41,708 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:20:41,713 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:20:41,714 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:20:41" (1/1) ... [2021-11-13 18:20:41,716 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1049997b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:20:41, skipping insertion in model container [2021-11-13 18:20:41,716 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:20:41" (1/1) ... [2021-11-13 18:20:41,724 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:20:42,027 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:20:44,771 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38629ab8-bcab-495c-898c-20f2fd474d48/sv-benchmarks/c/combinations/Problem05_label49+token_ring.08.cil-2.c[380593,380606] [2021-11-13 18:20:44,805 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38629ab8-bcab-495c-898c-20f2fd474d48/sv-benchmarks/c/combinations/Problem05_label49+token_ring.08.cil-2.c[383339,383352] [2021-11-13 18:20:45,110 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:20:45,118 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:20:46,346 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38629ab8-bcab-495c-898c-20f2fd474d48/sv-benchmarks/c/combinations/Problem05_label49+token_ring.08.cil-2.c[380593,380606] [2021-11-13 18:20:46,351 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38629ab8-bcab-495c-898c-20f2fd474d48/sv-benchmarks/c/combinations/Problem05_label49+token_ring.08.cil-2.c[383339,383352] [2021-11-13 18:20:46,389 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:20:46,472 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:20:46,473 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:20:46 WrapperNode [2021-11-13 18:20:46,473 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:20:46,474 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 18:20:46,474 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 18:20:46,474 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 18:20:46,482 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:20:46" (1/1) ... [2021-11-13 18:20:46,603 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:20:46" (1/1) ... [2021-11-13 18:20:47,147 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 18:20:47,148 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:20:47,148 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:20:47,148 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:20:47,158 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:20:46" (1/1) ... [2021-11-13 18:20:47,158 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:20:46" (1/1) ... [2021-11-13 18:20:47,316 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:20:46" (1/1) ... [2021-11-13 18:20:47,316 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:20:46" (1/1) ... [2021-11-13 18:20:47,542 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:20:46" (1/1) ... [2021-11-13 18:20:47,720 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:20:46" (1/1) ... [2021-11-13 18:20:47,793 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:20:46" (1/1) ... [2021-11-13 18:20:47,914 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:20:47,915 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:20:47,915 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:20:47,915 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:20:47,916 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:20:46" (1/1) ... [2021-11-13 18:20:47,924 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:20:47,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38629ab8-bcab-495c-898c-20f2fd474d48/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:20:47,972 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38629ab8-bcab-495c-898c-20f2fd474d48/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:20:48,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38629ab8-bcab-495c-898c-20f2fd474d48/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:20:48,106 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:20:48,119 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-11-13 18:20:48,119 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-11-13 18:20:48,119 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-13 18:20:48,119 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-13 18:20:48,119 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-11-13 18:20:48,120 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-11-13 18:20:48,120 INFO L130 BoogieDeclarations]: Found specification of procedure error [2021-11-13 18:20:48,120 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2021-11-13 18:20:48,120 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-11-13 18:20:48,120 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-11-13 18:20:48,120 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-11-13 18:20:48,121 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-11-13 18:20:48,121 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-11-13 18:20:48,121 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-11-13 18:20:48,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 18:20:48,121 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:20:48,121 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:20:56,315 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:20:56,316 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2021-11-13 18:20:56,323 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:20:56 BoogieIcfgContainer [2021-11-13 18:20:56,324 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:20:56,327 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:20:56,327 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:20:56,332 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:20:56,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:20:41" (1/3) ... [2021-11-13 18:20:56,333 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1844cc28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:20:56, skipping insertion in model container [2021-11-13 18:20:56,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:20:46" (2/3) ... [2021-11-13 18:20:56,334 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1844cc28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:20:56, skipping insertion in model container [2021-11-13 18:20:56,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:20:56" (3/3) ... [2021-11-13 18:20:56,336 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label49+token_ring.08.cil-2.c [2021-11-13 18:20:56,342 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:20:56,342 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-13 18:20:56,420 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:20:56,429 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 [2021-11-13 18:20:56,429 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-13 18:20:56,505 INFO L276 IsEmpty]: Start isEmpty. Operand has 2473 states, 2439 states have (on average 1.848708487084871) internal successors, (4509), 2444 states have internal predecessors, (4509), 24 states have call successors, (24), 7 states have call predecessors, (24), 7 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-13 18:20:56,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-13 18:20:56,524 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:20:56,525 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:20:56,525 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:20:56,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:20:56,531 INFO L85 PathProgramCache]: Analyzing trace with hash -970277371, now seen corresponding path program 1 times [2021-11-13 18:20:56,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:20:56,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206255360] [2021-11-13 18:20:56,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:20:56,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:20:56,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:56,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:20:56,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:56,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 18:20:56,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:56,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-13 18:20:56,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:57,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-13 18:20:57,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:57,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-11-13 18:20:57,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:57,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:20:57,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:20:57,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206255360] [2021-11-13 18:20:57,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206255360] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:20:57,091 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:20:57,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:20:57,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705140581] [2021-11-13 18:20:57,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:20:57,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:20:57,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:20:57,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:20:57,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:20:57,160 INFO L87 Difference]: Start difference. First operand has 2473 states, 2439 states have (on average 1.848708487084871) internal successors, (4509), 2444 states have internal predecessors, (4509), 24 states have call successors, (24), 7 states have call predecessors, (24), 7 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) Second operand has 5 states, 5 states have (on average 24.8) internal successors, (124), 3 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:20:58,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:20:58,921 INFO L93 Difference]: Finished difference Result 5037 states and 9272 transitions. [2021-11-13 18:20:58,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:20:58,924 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 3 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2021-11-13 18:20:58,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:20:58,956 INFO L225 Difference]: With dead ends: 5037 [2021-11-13 18:20:58,957 INFO L226 Difference]: Without dead ends: 2503 [2021-11-13 18:20:58,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:20:58,970 INFO L933 BasicCegarLoop]: 4511 mSDtfsCounter, 748 mSDsluCounter, 12395 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 917.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 768 SdHoareTripleChecker+Valid, 16906 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 143.94ms SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1064.08ms IncrementalHoareTripleChecker+Time [2021-11-13 18:20:58,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [768 Valid, 16906 Invalid, 551 Unknown, 0 Unchecked, 143.94ms Time], IncrementalHoareTripleChecker [56 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 1064.08ms Time] [2021-11-13 18:20:58,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2503 states. [2021-11-13 18:20:59,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2503 to 2405. [2021-11-13 18:20:59,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2405 states, 2373 states have (on average 1.8348082595870205) internal successors, (4354), 2376 states have internal predecessors, (4354), 24 states have call successors, (24), 7 states have call predecessors, (24), 6 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-13 18:20:59,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2405 states to 2405 states and 4400 transitions. [2021-11-13 18:20:59,153 INFO L78 Accepts]: Start accepts. Automaton has 2405 states and 4400 transitions. Word has length 135 [2021-11-13 18:20:59,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:20:59,153 INFO L470 AbstractCegarLoop]: Abstraction has 2405 states and 4400 transitions. [2021-11-13 18:20:59,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 3 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:20:59,155 INFO L276 IsEmpty]: Start isEmpty. Operand 2405 states and 4400 transitions. [2021-11-13 18:20:59,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-13 18:20:59,168 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:20:59,169 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:20:59,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 18:20:59,170 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:20:59,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:20:59,173 INFO L85 PathProgramCache]: Analyzing trace with hash -540619065, now seen corresponding path program 1 times [2021-11-13 18:20:59,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:20:59,174 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561662796] [2021-11-13 18:20:59,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:20:59,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:20:59,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:59,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:20:59,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:59,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 18:20:59,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:59,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-13 18:20:59,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:59,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-13 18:20:59,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:59,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-11-13 18:20:59,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:59,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:20:59,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:20:59,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561662796] [2021-11-13 18:20:59,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561662796] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:20:59,552 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:20:59,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 18:20:59,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103625209] [2021-11-13 18:20:59,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:20:59,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:20:59,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:20:59,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:20:59,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:20:59,556 INFO L87 Difference]: Start difference. First operand 2405 states and 4400 transitions. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 4 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:21:01,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:21:01,173 INFO L93 Difference]: Finished difference Result 2770 states and 4985 transitions. [2021-11-13 18:21:01,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:21:01,174 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 4 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2021-11-13 18:21:01,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:21:01,194 INFO L225 Difference]: With dead ends: 2770 [2021-11-13 18:21:01,194 INFO L226 Difference]: Without dead ends: 2502 [2021-11-13 18:21:01,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:21:01,202 INFO L933 BasicCegarLoop]: 4406 mSDtfsCounter, 4687 mSDsluCounter, 12385 mSDsCounter, 0 mSdLazyCounter, 940 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1022.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4703 SdHoareTripleChecker+Valid, 16791 SdHoareTripleChecker+Invalid, 1002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 123.00ms SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 940 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1196.41ms IncrementalHoareTripleChecker+Time [2021-11-13 18:21:01,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4703 Valid, 16791 Invalid, 1002 Unknown, 0 Unchecked, 123.00ms Time], IncrementalHoareTripleChecker [62 Valid, 940 Invalid, 0 Unknown, 0 Unchecked, 1196.41ms Time] [2021-11-13 18:21:01,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2502 states. [2021-11-13 18:21:01,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2502 to 2405. [2021-11-13 18:21:01,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2405 states, 2373 states have (on average 1.8343868520859672) internal successors, (4353), 2376 states have internal predecessors, (4353), 24 states have call successors, (24), 7 states have call predecessors, (24), 6 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-13 18:21:01,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2405 states to 2405 states and 4399 transitions. [2021-11-13 18:21:01,307 INFO L78 Accepts]: Start accepts. Automaton has 2405 states and 4399 transitions. Word has length 135 [2021-11-13 18:21:01,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:21:01,310 INFO L470 AbstractCegarLoop]: Abstraction has 2405 states and 4399 transitions. [2021-11-13 18:21:01,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 4 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:21:01,311 INFO L276 IsEmpty]: Start isEmpty. Operand 2405 states and 4399 transitions. [2021-11-13 18:21:01,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-13 18:21:01,313 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:21:01,314 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:21:01,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 18:21:01,315 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:21:01,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:21:01,317 INFO L85 PathProgramCache]: Analyzing trace with hash -873262203, now seen corresponding path program 1 times [2021-11-13 18:21:01,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:21:01,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622728534] [2021-11-13 18:21:01,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:21:01,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:21:01,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:01,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:21:01,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:01,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 18:21:01,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:01,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-13 18:21:01,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:01,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-13 18:21:01,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:01,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-11-13 18:21:01,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:01,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:21:01,498 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:21:01,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622728534] [2021-11-13 18:21:01,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622728534] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:21:01,498 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:21:01,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:21:01,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497742239] [2021-11-13 18:21:01,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:21:01,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:21:01,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:21:01,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:21:01,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:21:01,501 INFO L87 Difference]: Start difference. First operand 2405 states and 4399 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:21:03,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:21:03,066 INFO L93 Difference]: Finished difference Result 2787 states and 5016 transitions. [2021-11-13 18:21:03,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:21:03,067 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2021-11-13 18:21:03,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:21:03,082 INFO L225 Difference]: With dead ends: 2787 [2021-11-13 18:21:03,083 INFO L226 Difference]: Without dead ends: 2519 [2021-11-13 18:21:03,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:21:03,086 INFO L933 BasicCegarLoop]: 4433 mSDtfsCounter, 4867 mSDsluCounter, 12436 mSDsCounter, 0 mSdLazyCounter, 960 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1043.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4883 SdHoareTripleChecker+Valid, 16869 SdHoareTripleChecker+Invalid, 1050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 54.75ms SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1202.31ms IncrementalHoareTripleChecker+Time [2021-11-13 18:21:03,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4883 Valid, 16869 Invalid, 1050 Unknown, 0 Unchecked, 54.75ms Time], IncrementalHoareTripleChecker [90 Valid, 960 Invalid, 0 Unknown, 0 Unchecked, 1202.31ms Time] [2021-11-13 18:21:03,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2519 states. [2021-11-13 18:21:03,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2519 to 2405. [2021-11-13 18:21:03,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2405 states, 2373 states have (on average 1.8339654445849136) internal successors, (4352), 2376 states have internal predecessors, (4352), 24 states have call successors, (24), 7 states have call predecessors, (24), 6 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-13 18:21:03,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2405 states to 2405 states and 4398 transitions. [2021-11-13 18:21:03,171 INFO L78 Accepts]: Start accepts. Automaton has 2405 states and 4398 transitions. Word has length 135 [2021-11-13 18:21:03,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:21:03,171 INFO L470 AbstractCegarLoop]: Abstraction has 2405 states and 4398 transitions. [2021-11-13 18:21:03,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:21:03,172 INFO L276 IsEmpty]: Start isEmpty. Operand 2405 states and 4398 transitions. [2021-11-13 18:21:03,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-13 18:21:03,174 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:21:03,175 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:21:03,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-13 18:21:03,175 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:21:03,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:21:03,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1055670023, now seen corresponding path program 1 times [2021-11-13 18:21:03,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:21:03,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003039148] [2021-11-13 18:21:03,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:21:03,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:21:03,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:03,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:21:03,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:03,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 18:21:03,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:03,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-13 18:21:03,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:03,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-13 18:21:03,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:03,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-11-13 18:21:03,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:03,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:21:03,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:21:03,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003039148] [2021-11-13 18:21:03,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003039148] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:21:03,311 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:21:03,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:21:03,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816375885] [2021-11-13 18:21:03,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:21:03,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:21:03,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:21:03,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:21:03,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:21:03,314 INFO L87 Difference]: Start difference. First operand 2405 states and 4398 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:21:04,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:21:04,891 INFO L93 Difference]: Finished difference Result 2768 states and 4979 transitions. [2021-11-13 18:21:04,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:21:04,892 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2021-11-13 18:21:04,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:21:04,908 INFO L225 Difference]: With dead ends: 2768 [2021-11-13 18:21:04,909 INFO L226 Difference]: Without dead ends: 2500 [2021-11-13 18:21:04,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-13 18:21:04,913 INFO L933 BasicCegarLoop]: 4396 mSDtfsCounter, 4745 mSDsluCounter, 16543 mSDsCounter, 0 mSdLazyCounter, 965 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1052.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4761 SdHoareTripleChecker+Valid, 20939 SdHoareTripleChecker+Invalid, 1030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 83.12ms SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1216.55ms IncrementalHoareTripleChecker+Time [2021-11-13 18:21:04,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4761 Valid, 20939 Invalid, 1030 Unknown, 0 Unchecked, 83.12ms Time], IncrementalHoareTripleChecker [65 Valid, 965 Invalid, 0 Unknown, 0 Unchecked, 1216.55ms Time] [2021-11-13 18:21:04,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2500 states. [2021-11-13 18:21:04,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2500 to 2405. [2021-11-13 18:21:04,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2405 states, 2373 states have (on average 1.8327012220817531) internal successors, (4349), 2376 states have internal predecessors, (4349), 24 states have call successors, (24), 7 states have call predecessors, (24), 6 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-13 18:21:05,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2405 states to 2405 states and 4395 transitions. [2021-11-13 18:21:05,002 INFO L78 Accepts]: Start accepts. Automaton has 2405 states and 4395 transitions. Word has length 135 [2021-11-13 18:21:05,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:21:05,003 INFO L470 AbstractCegarLoop]: Abstraction has 2405 states and 4395 transitions. [2021-11-13 18:21:05,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:21:05,003 INFO L276 IsEmpty]: Start isEmpty. Operand 2405 states and 4395 transitions. [2021-11-13 18:21:05,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-13 18:21:05,006 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:21:05,006 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:21:05,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-13 18:21:05,007 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:21:05,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:21:05,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1237411003, now seen corresponding path program 1 times [2021-11-13 18:21:05,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:21:05,008 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219908163] [2021-11-13 18:21:05,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:21:05,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:21:05,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:05,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:21:05,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:05,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 18:21:05,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:05,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-13 18:21:05,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:05,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-13 18:21:05,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:05,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-11-13 18:21:05,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:05,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:21:05,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:21:05,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219908163] [2021-11-13 18:21:05,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219908163] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:21:05,190 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:21:05,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-13 18:21:05,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576074443] [2021-11-13 18:21:05,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:21:05,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:21:05,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:21:05,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:21:05,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:21:05,193 INFO L87 Difference]: Start difference. First operand 2405 states and 4395 transitions. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 6 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:21:08,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:21:08,406 INFO L93 Difference]: Finished difference Result 3159 states and 5594 transitions. [2021-11-13 18:21:08,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-13 18:21:08,407 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 6 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2021-11-13 18:21:08,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:21:08,425 INFO L225 Difference]: With dead ends: 3159 [2021-11-13 18:21:08,425 INFO L226 Difference]: Without dead ends: 2891 [2021-11-13 18:21:08,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-11-13 18:21:08,430 INFO L933 BasicCegarLoop]: 4689 mSDtfsCounter, 5153 mSDsluCounter, 21778 mSDsCounter, 0 mSdLazyCounter, 2252 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2090.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5169 SdHoareTripleChecker+Valid, 26467 SdHoareTripleChecker+Invalid, 2333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 101.15ms SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 2252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2430.14ms IncrementalHoareTripleChecker+Time [2021-11-13 18:21:08,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5169 Valid, 26467 Invalid, 2333 Unknown, 0 Unchecked, 101.15ms Time], IncrementalHoareTripleChecker [81 Valid, 2252 Invalid, 0 Unknown, 0 Unchecked, 2430.14ms Time] [2021-11-13 18:21:08,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2891 states. [2021-11-13 18:21:08,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2891 to 2683. [2021-11-13 18:21:08,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2683 states, 2626 states have (on average 1.806930693069307) internal successors, (4745), 2630 states have internal predecessors, (4745), 42 states have call successors, (42), 13 states have call predecessors, (42), 13 states have return successors, (43), 41 states have call predecessors, (43), 40 states have call successors, (43) [2021-11-13 18:21:08,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2683 states to 2683 states and 4830 transitions. [2021-11-13 18:21:08,573 INFO L78 Accepts]: Start accepts. Automaton has 2683 states and 4830 transitions. Word has length 135 [2021-11-13 18:21:08,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:21:08,574 INFO L470 AbstractCegarLoop]: Abstraction has 2683 states and 4830 transitions. [2021-11-13 18:21:08,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 6 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:21:08,574 INFO L276 IsEmpty]: Start isEmpty. Operand 2683 states and 4830 transitions. [2021-11-13 18:21:08,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-13 18:21:08,577 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:21:08,577 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:21:08,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-13 18:21:08,578 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:21:08,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:21:08,578 INFO L85 PathProgramCache]: Analyzing trace with hash 489733959, now seen corresponding path program 1 times [2021-11-13 18:21:08,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:21:08,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872307030] [2021-11-13 18:21:08,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:21:08,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:21:08,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:08,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:21:08,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:08,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 18:21:08,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:08,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-13 18:21:08,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:08,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-13 18:21:08,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:08,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-11-13 18:21:08,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:08,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:21:08,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:21:08,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872307030] [2021-11-13 18:21:08,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872307030] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:21:08,741 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:21:08,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:21:08,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280101354] [2021-11-13 18:21:08,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:21:08,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:21:08,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:21:08,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:21:08,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:21:08,744 INFO L87 Difference]: Start difference. First operand 2683 states and 4830 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:21:10,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:21:10,245 INFO L93 Difference]: Finished difference Result 3460 states and 6079 transitions. [2021-11-13 18:21:10,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:21:10,246 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2021-11-13 18:21:10,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:21:10,265 INFO L225 Difference]: With dead ends: 3460 [2021-11-13 18:21:10,265 INFO L226 Difference]: Without dead ends: 2914 [2021-11-13 18:21:10,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:21:10,270 INFO L933 BasicCegarLoop]: 4415 mSDtfsCounter, 4743 mSDsluCounter, 16542 mSDsCounter, 0 mSdLazyCounter, 1041 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 957.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4759 SdHoareTripleChecker+Valid, 20957 SdHoareTripleChecker+Invalid, 1114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 69.56ms SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1128.58ms IncrementalHoareTripleChecker+Time [2021-11-13 18:21:10,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4759 Valid, 20957 Invalid, 1114 Unknown, 0 Unchecked, 69.56ms Time], IncrementalHoareTripleChecker [73 Valid, 1041 Invalid, 0 Unknown, 0 Unchecked, 1128.58ms Time] [2021-11-13 18:21:10,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2914 states. [2021-11-13 18:21:10,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2914 to 2683. [2021-11-13 18:21:10,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2683 states, 2626 states have (on average 1.8061690784463063) internal successors, (4743), 2630 states have internal predecessors, (4743), 42 states have call successors, (42), 13 states have call predecessors, (42), 13 states have return successors, (43), 41 states have call predecessors, (43), 40 states have call successors, (43) [2021-11-13 18:21:10,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2683 states to 2683 states and 4828 transitions. [2021-11-13 18:21:10,392 INFO L78 Accepts]: Start accepts. Automaton has 2683 states and 4828 transitions. Word has length 135 [2021-11-13 18:21:10,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:21:10,392 INFO L470 AbstractCegarLoop]: Abstraction has 2683 states and 4828 transitions. [2021-11-13 18:21:10,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:21:10,393 INFO L276 IsEmpty]: Start isEmpty. Operand 2683 states and 4828 transitions. [2021-11-13 18:21:10,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-13 18:21:10,395 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:21:10,396 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:21:10,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-13 18:21:10,396 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:21:10,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:21:10,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1157628983, now seen corresponding path program 1 times [2021-11-13 18:21:10,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:21:10,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074687477] [2021-11-13 18:21:10,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:21:10,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:21:10,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:10,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:21:10,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:10,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 18:21:10,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:10,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-13 18:21:10,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:10,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-13 18:21:10,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:10,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-11-13 18:21:10,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:10,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:21:10,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:21:10,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074687477] [2021-11-13 18:21:10,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074687477] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:21:10,536 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:21:10,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:21:10,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383776813] [2021-11-13 18:21:10,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:21:10,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:21:10,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:21:10,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:21:10,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:21:10,538 INFO L87 Difference]: Start difference. First operand 2683 states and 4828 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:21:11,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:21:11,813 INFO L93 Difference]: Finished difference Result 3457 states and 6067 transitions. [2021-11-13 18:21:11,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:21:11,823 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2021-11-13 18:21:11,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:21:11,843 INFO L225 Difference]: With dead ends: 3457 [2021-11-13 18:21:11,843 INFO L226 Difference]: Without dead ends: 2911 [2021-11-13 18:21:11,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:21:11,850 INFO L933 BasicCegarLoop]: 4411 mSDtfsCounter, 4859 mSDsluCounter, 12433 mSDsCounter, 0 mSdLazyCounter, 910 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 804.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4875 SdHoareTripleChecker+Valid, 16844 SdHoareTripleChecker+Invalid, 1007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 43.83ms SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 952.25ms IncrementalHoareTripleChecker+Time [2021-11-13 18:21:11,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4875 Valid, 16844 Invalid, 1007 Unknown, 0 Unchecked, 43.83ms Time], IncrementalHoareTripleChecker [97 Valid, 910 Invalid, 0 Unknown, 0 Unchecked, 952.25ms Time] [2021-11-13 18:21:11,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2911 states. [2021-11-13 18:21:12,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2911 to 2683. [2021-11-13 18:21:12,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2683 states, 2626 states have (on average 1.8054074638233053) internal successors, (4741), 2630 states have internal predecessors, (4741), 42 states have call successors, (42), 13 states have call predecessors, (42), 13 states have return successors, (43), 41 states have call predecessors, (43), 40 states have call successors, (43) [2021-11-13 18:21:12,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2683 states to 2683 states and 4826 transitions. [2021-11-13 18:21:12,058 INFO L78 Accepts]: Start accepts. Automaton has 2683 states and 4826 transitions. Word has length 135 [2021-11-13 18:21:12,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:21:12,059 INFO L470 AbstractCegarLoop]: Abstraction has 2683 states and 4826 transitions. [2021-11-13 18:21:12,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:21:12,059 INFO L276 IsEmpty]: Start isEmpty. Operand 2683 states and 4826 transitions. [2021-11-13 18:21:12,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-13 18:21:12,062 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:21:12,062 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:21:12,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-13 18:21:12,063 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:21:12,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:21:12,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1005987591, now seen corresponding path program 1 times [2021-11-13 18:21:12,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:21:12,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319119403] [2021-11-13 18:21:12,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:21:12,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:21:12,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:12,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:21:12,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:12,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 18:21:12,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:12,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-13 18:21:12,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:12,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-13 18:21:12,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:12,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-11-13 18:21:12,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:12,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:21:12,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:21:12,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319119403] [2021-11-13 18:21:12,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319119403] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:21:12,205 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:21:12,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:21:12,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752760296] [2021-11-13 18:21:12,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:21:12,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:21:12,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:21:12,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:21:12,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:21:12,208 INFO L87 Difference]: Start difference. First operand 2683 states and 4826 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:21:13,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:21:13,546 INFO L93 Difference]: Finished difference Result 3454 states and 6055 transitions. [2021-11-13 18:21:13,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:21:13,547 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2021-11-13 18:21:13,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:21:13,567 INFO L225 Difference]: With dead ends: 3454 [2021-11-13 18:21:13,568 INFO L226 Difference]: Without dead ends: 2908 [2021-11-13 18:21:13,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:21:13,572 INFO L933 BasicCegarLoop]: 4407 mSDtfsCounter, 4739 mSDsluCounter, 16542 mSDsCounter, 0 mSdLazyCounter, 1017 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 853.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4755 SdHoareTripleChecker+Valid, 20949 SdHoareTripleChecker+Invalid, 1090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 55.79ms SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1033.15ms IncrementalHoareTripleChecker+Time [2021-11-13 18:21:13,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4755 Valid, 20949 Invalid, 1090 Unknown, 0 Unchecked, 55.79ms Time], IncrementalHoareTripleChecker [73 Valid, 1017 Invalid, 0 Unknown, 0 Unchecked, 1033.15ms Time] [2021-11-13 18:21:13,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2908 states. [2021-11-13 18:21:13,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2908 to 2683. [2021-11-13 18:21:13,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2683 states, 2626 states have (on average 1.8046458492003046) internal successors, (4739), 2630 states have internal predecessors, (4739), 42 states have call successors, (42), 13 states have call predecessors, (42), 13 states have return successors, (43), 41 states have call predecessors, (43), 40 states have call successors, (43) [2021-11-13 18:21:13,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2683 states to 2683 states and 4824 transitions. [2021-11-13 18:21:13,704 INFO L78 Accepts]: Start accepts. Automaton has 2683 states and 4824 transitions. Word has length 135 [2021-11-13 18:21:13,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:21:13,705 INFO L470 AbstractCegarLoop]: Abstraction has 2683 states and 4824 transitions. [2021-11-13 18:21:13,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:21:13,706 INFO L276 IsEmpty]: Start isEmpty. Operand 2683 states and 4824 transitions. [2021-11-13 18:21:13,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-13 18:21:13,709 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:21:13,709 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:21:13,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-13 18:21:13,710 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:21:13,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:21:13,710 INFO L85 PathProgramCache]: Analyzing trace with hash -32596983, now seen corresponding path program 1 times [2021-11-13 18:21:13,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:21:13,711 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390052905] [2021-11-13 18:21:13,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:21:13,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:21:13,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:13,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:21:13,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:13,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 18:21:13,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:13,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-13 18:21:13,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:13,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-13 18:21:13,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:13,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-11-13 18:21:13,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:13,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:21:13,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:21:13,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390052905] [2021-11-13 18:21:13,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390052905] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:21:13,881 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:21:13,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-13 18:21:13,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319439492] [2021-11-13 18:21:13,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:21:13,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:21:13,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:21:13,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:21:13,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:21:13,884 INFO L87 Difference]: Start difference. First operand 2683 states and 4824 transitions. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 6 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:21:16,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:21:16,542 INFO L93 Difference]: Finished difference Result 4206 states and 7232 transitions. [2021-11-13 18:21:16,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-13 18:21:16,542 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 6 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2021-11-13 18:21:16,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:21:16,569 INFO L225 Difference]: With dead ends: 4206 [2021-11-13 18:21:16,569 INFO L226 Difference]: Without dead ends: 3660 [2021-11-13 18:21:16,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-11-13 18:21:16,574 INFO L933 BasicCegarLoop]: 4660 mSDtfsCounter, 5123 mSDsluCounter, 21774 mSDsCounter, 0 mSdLazyCounter, 2147 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1676.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5139 SdHoareTripleChecker+Valid, 26434 SdHoareTripleChecker+Invalid, 2227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 76.27ms SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 2147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1993.50ms IncrementalHoareTripleChecker+Time [2021-11-13 18:21:16,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5139 Valid, 26434 Invalid, 2227 Unknown, 0 Unchecked, 76.27ms Time], IncrementalHoareTripleChecker [80 Valid, 2147 Invalid, 0 Unknown, 0 Unchecked, 1993.50ms Time] [2021-11-13 18:21:16,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3660 states. [2021-11-13 18:21:16,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3660 to 3256. [2021-11-13 18:21:16,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3256 states, 3147 states have (on average 1.7642198919605974) internal successors, (5552), 3155 states have internal predecessors, (5552), 78 states have call successors, (78), 25 states have call predecessors, (78), 29 states have return successors, (91), 79 states have call predecessors, (91), 76 states have call successors, (91) [2021-11-13 18:21:16,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3256 states to 3256 states and 5721 transitions. [2021-11-13 18:21:16,772 INFO L78 Accepts]: Start accepts. Automaton has 3256 states and 5721 transitions. Word has length 135 [2021-11-13 18:21:16,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:21:16,773 INFO L470 AbstractCegarLoop]: Abstraction has 3256 states and 5721 transitions. [2021-11-13 18:21:16,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 6 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:21:16,773 INFO L276 IsEmpty]: Start isEmpty. Operand 3256 states and 5721 transitions. [2021-11-13 18:21:16,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-13 18:21:16,776 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:21:16,777 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:21:16,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-13 18:21:16,777 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:21:16,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:21:16,778 INFO L85 PathProgramCache]: Analyzing trace with hash -2005762361, now seen corresponding path program 1 times [2021-11-13 18:21:16,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:21:16,778 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212399958] [2021-11-13 18:21:16,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:21:16,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:21:16,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:16,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:21:16,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:16,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 18:21:16,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:16,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-13 18:21:16,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:16,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-13 18:21:16,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:16,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-11-13 18:21:16,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:16,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:21:16,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:21:16,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212399958] [2021-11-13 18:21:16,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212399958] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:21:16,930 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:21:16,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:21:16,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421885950] [2021-11-13 18:21:16,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:21:16,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:21:16,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:21:16,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:21:16,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:21:16,932 INFO L87 Difference]: Start difference. First operand 3256 states and 5721 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:21:18,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:21:18,359 INFO L93 Difference]: Finished difference Result 4843 states and 8257 transitions. [2021-11-13 18:21:18,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:21:18,360 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2021-11-13 18:21:18,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:21:18,394 INFO L225 Difference]: With dead ends: 4843 [2021-11-13 18:21:18,395 INFO L226 Difference]: Without dead ends: 3724 [2021-11-13 18:21:18,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:21:18,400 INFO L933 BasicCegarLoop]: 4400 mSDtfsCounter, 4736 mSDsluCounter, 16540 mSDsCounter, 0 mSdLazyCounter, 1000 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 868.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4752 SdHoareTripleChecker+Valid, 20940 SdHoareTripleChecker+Invalid, 1075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 68.63ms SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1000 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1049.71ms IncrementalHoareTripleChecker+Time [2021-11-13 18:21:18,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4752 Valid, 20940 Invalid, 1075 Unknown, 0 Unchecked, 68.63ms Time], IncrementalHoareTripleChecker [75 Valid, 1000 Invalid, 0 Unknown, 0 Unchecked, 1049.71ms Time] [2021-11-13 18:21:18,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3724 states. [2021-11-13 18:21:18,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3724 to 3256. [2021-11-13 18:21:18,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3256 states, 3147 states have (on average 1.7629488401652367) internal successors, (5548), 3155 states have internal predecessors, (5548), 78 states have call successors, (78), 25 states have call predecessors, (78), 29 states have return successors, (91), 79 states have call predecessors, (91), 76 states have call successors, (91) [2021-11-13 18:21:18,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3256 states to 3256 states and 5717 transitions. [2021-11-13 18:21:18,574 INFO L78 Accepts]: Start accepts. Automaton has 3256 states and 5717 transitions. Word has length 135 [2021-11-13 18:21:18,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:21:18,576 INFO L470 AbstractCegarLoop]: Abstraction has 3256 states and 5717 transitions. [2021-11-13 18:21:18,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:21:18,576 INFO L276 IsEmpty]: Start isEmpty. Operand 3256 states and 5717 transitions. [2021-11-13 18:21:18,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-13 18:21:18,579 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:21:18,579 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:21:18,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-13 18:21:18,580 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:21:18,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:21:18,580 INFO L85 PathProgramCache]: Analyzing trace with hash 147344457, now seen corresponding path program 1 times [2021-11-13 18:21:18,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:21:18,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794398542] [2021-11-13 18:21:18,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:21:18,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:21:18,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:18,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:21:18,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:18,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 18:21:18,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:18,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-13 18:21:18,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:18,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-13 18:21:18,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:18,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-11-13 18:21:18,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:18,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:21:18,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:21:18,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794398542] [2021-11-13 18:21:18,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794398542] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:21:18,792 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:21:18,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:21:18,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759218643] [2021-11-13 18:21:18,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:21:18,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:21:18,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:21:18,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:21:18,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:21:18,795 INFO L87 Difference]: Start difference. First operand 3256 states and 5717 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:21:20,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:21:20,284 INFO L93 Difference]: Finished difference Result 4834 states and 8227 transitions. [2021-11-13 18:21:20,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:21:20,285 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2021-11-13 18:21:20,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:21:20,298 INFO L225 Difference]: With dead ends: 4834 [2021-11-13 18:21:20,298 INFO L226 Difference]: Without dead ends: 3715 [2021-11-13 18:21:20,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:21:20,304 INFO L933 BasicCegarLoop]: 4379 mSDtfsCounter, 4764 mSDsluCounter, 16538 mSDsCounter, 0 mSdLazyCounter, 952 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 938.77ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4780 SdHoareTripleChecker+Valid, 20917 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 68.39ms SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 952 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1083.01ms IncrementalHoareTripleChecker+Time [2021-11-13 18:21:20,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4780 Valid, 20917 Invalid, 1029 Unknown, 0 Unchecked, 68.39ms Time], IncrementalHoareTripleChecker [77 Valid, 952 Invalid, 0 Unknown, 0 Unchecked, 1083.01ms Time] [2021-11-13 18:21:20,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3715 states. [2021-11-13 18:21:20,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3715 to 3256. [2021-11-13 18:21:20,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3256 states, 3147 states have (on average 1.761677788369876) internal successors, (5544), 3155 states have internal predecessors, (5544), 78 states have call successors, (78), 25 states have call predecessors, (78), 29 states have return successors, (91), 79 states have call predecessors, (91), 76 states have call successors, (91) [2021-11-13 18:21:20,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3256 states to 3256 states and 5713 transitions. [2021-11-13 18:21:20,469 INFO L78 Accepts]: Start accepts. Automaton has 3256 states and 5713 transitions. Word has length 135 [2021-11-13 18:21:20,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:21:20,469 INFO L470 AbstractCegarLoop]: Abstraction has 3256 states and 5713 transitions. [2021-11-13 18:21:20,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:21:20,470 INFO L276 IsEmpty]: Start isEmpty. Operand 3256 states and 5713 transitions. [2021-11-13 18:21:20,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-13 18:21:20,472 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:21:20,473 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:21:20,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-13 18:21:20,473 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:21:20,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:21:20,474 INFO L85 PathProgramCache]: Analyzing trace with hash -475937145, now seen corresponding path program 1 times [2021-11-13 18:21:20,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:21:20,474 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831598178] [2021-11-13 18:21:20,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:21:20,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:21:20,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:20,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:21:20,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:20,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 18:21:20,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:20,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-13 18:21:20,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:20,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-13 18:21:20,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:20,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-11-13 18:21:20,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:20,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:21:20,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:21:20,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831598178] [2021-11-13 18:21:20,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831598178] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:21:20,641 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:21:20,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-13 18:21:20,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020834302] [2021-11-13 18:21:20,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:21:20,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:21:20,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:21:20,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:21:20,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:21:20,643 INFO L87 Difference]: Start difference. First operand 3256 states and 5713 transitions. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 6 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:21:23,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:21:23,428 INFO L93 Difference]: Finished difference Result 6736 states and 11203 transitions. [2021-11-13 18:21:23,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-13 18:21:23,429 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 6 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2021-11-13 18:21:23,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:21:23,447 INFO L225 Difference]: With dead ends: 6736 [2021-11-13 18:21:23,447 INFO L226 Difference]: Without dead ends: 5617 [2021-11-13 18:21:23,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-11-13 18:21:23,455 INFO L933 BasicCegarLoop]: 4640 mSDtfsCounter, 5358 mSDsluCounter, 21762 mSDsCounter, 0 mSdLazyCounter, 2072 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1674.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5384 SdHoareTripleChecker+Valid, 26402 SdHoareTripleChecker+Invalid, 2161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 82.76ms SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 2072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1983.68ms IncrementalHoareTripleChecker+Time [2021-11-13 18:21:23,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5384 Valid, 26402 Invalid, 2161 Unknown, 0 Unchecked, 82.76ms Time], IncrementalHoareTripleChecker [89 Valid, 2072 Invalid, 0 Unknown, 0 Unchecked, 1983.68ms Time] [2021-11-13 18:21:23,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5617 states. [2021-11-13 18:21:23,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5617 to 4429. [2021-11-13 18:21:23,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4429 states, 4214 states have (on average 1.7114380635975321) internal successors, (7212), 4236 states have internal predecessors, (7212), 146 states have call successors, (146), 49 states have call predecessors, (146), 67 states have return successors, (207), 151 states have call predecessors, (207), 144 states have call successors, (207) [2021-11-13 18:21:23,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4429 states to 4429 states and 7565 transitions. [2021-11-13 18:21:23,676 INFO L78 Accepts]: Start accepts. Automaton has 4429 states and 7565 transitions. Word has length 135 [2021-11-13 18:21:23,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:21:23,677 INFO L470 AbstractCegarLoop]: Abstraction has 4429 states and 7565 transitions. [2021-11-13 18:21:23,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 6 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:21:23,678 INFO L276 IsEmpty]: Start isEmpty. Operand 4429 states and 7565 transitions. [2021-11-13 18:21:23,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-13 18:21:23,681 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:21:23,682 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:21:23,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-13 18:21:23,682 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:21:23,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:21:23,683 INFO L85 PathProgramCache]: Analyzing trace with hash -357495671, now seen corresponding path program 1 times [2021-11-13 18:21:23,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:21:23,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665608362] [2021-11-13 18:21:23,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:21:23,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:21:23,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:23,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:21:23,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:23,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 18:21:23,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:23,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-13 18:21:23,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:23,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-13 18:21:23,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:23,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-11-13 18:21:23,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:23,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:21:23,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:21:23,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665608362] [2021-11-13 18:21:23,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665608362] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:21:23,825 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:21:23,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:21:23,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639326135] [2021-11-13 18:21:23,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:21:23,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:21:23,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:21:23,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:21:23,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:21:23,827 INFO L87 Difference]: Start difference. First operand 4429 states and 7565 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:21:25,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:21:25,408 INFO L93 Difference]: Finished difference Result 7639 states and 12685 transitions. [2021-11-13 18:21:25,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:21:25,409 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2021-11-13 18:21:25,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:21:25,426 INFO L225 Difference]: With dead ends: 7639 [2021-11-13 18:21:25,426 INFO L226 Difference]: Without dead ends: 5347 [2021-11-13 18:21:25,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:21:25,436 INFO L933 BasicCegarLoop]: 4385 mSDtfsCounter, 4852 mSDsluCounter, 12431 mSDsCounter, 0 mSdLazyCounter, 855 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 922.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4868 SdHoareTripleChecker+Valid, 16816 SdHoareTripleChecker+Invalid, 957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 42.55ms SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1051.77ms IncrementalHoareTripleChecker+Time [2021-11-13 18:21:25,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4868 Valid, 16816 Invalid, 957 Unknown, 0 Unchecked, 42.55ms Time], IncrementalHoareTripleChecker [102 Valid, 855 Invalid, 0 Unknown, 0 Unchecked, 1051.77ms Time] [2021-11-13 18:21:25,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5347 states. [2021-11-13 18:21:25,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5347 to 4429. [2021-11-13 18:21:25,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4429 states, 4214 states have (on average 1.7095396298054106) internal successors, (7204), 4236 states have internal predecessors, (7204), 146 states have call successors, (146), 49 states have call predecessors, (146), 67 states have return successors, (207), 151 states have call predecessors, (207), 144 states have call successors, (207) [2021-11-13 18:21:25,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4429 states to 4429 states and 7557 transitions. [2021-11-13 18:21:25,696 INFO L78 Accepts]: Start accepts. Automaton has 4429 states and 7557 transitions. Word has length 135 [2021-11-13 18:21:25,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:21:25,698 INFO L470 AbstractCegarLoop]: Abstraction has 4429 states and 7557 transitions. [2021-11-13 18:21:25,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:21:25,699 INFO L276 IsEmpty]: Start isEmpty. Operand 4429 states and 7557 transitions. [2021-11-13 18:21:25,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-13 18:21:25,704 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:21:25,704 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:21:25,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-13 18:21:25,705 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:21:25,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:21:25,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1904077579, now seen corresponding path program 1 times [2021-11-13 18:21:25,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:21:25,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009654219] [2021-11-13 18:21:25,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:21:25,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:21:25,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:25,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:21:25,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:25,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 18:21:25,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:25,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-13 18:21:25,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:25,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-13 18:21:25,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:25,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-11-13 18:21:25,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:25,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:21:25,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:21:25,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009654219] [2021-11-13 18:21:25,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009654219] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:21:25,868 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:21:25,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:21:25,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980213407] [2021-11-13 18:21:25,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:21:25,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:21:25,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:21:25,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:21:25,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:21:25,870 INFO L87 Difference]: Start difference. First operand 4429 states and 7557 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:21:27,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:21:27,220 INFO L93 Difference]: Finished difference Result 7612 states and 12607 transitions. [2021-11-13 18:21:27,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:21:27,221 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2021-11-13 18:21:27,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:21:27,238 INFO L225 Difference]: With dead ends: 7612 [2021-11-13 18:21:27,238 INFO L226 Difference]: Without dead ends: 5320 [2021-11-13 18:21:27,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:21:27,248 INFO L933 BasicCegarLoop]: 4381 mSDtfsCounter, 4732 mSDsluCounter, 16540 mSDsCounter, 0 mSdLazyCounter, 948 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 760.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4748 SdHoareTripleChecker+Valid, 20921 SdHoareTripleChecker+Invalid, 1026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 50.22ms SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 913.50ms IncrementalHoareTripleChecker+Time [2021-11-13 18:21:27,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4748 Valid, 20921 Invalid, 1026 Unknown, 0 Unchecked, 50.22ms Time], IncrementalHoareTripleChecker [78 Valid, 948 Invalid, 0 Unknown, 0 Unchecked, 913.50ms Time] [2021-11-13 18:21:27,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5320 states. [2021-11-13 18:21:27,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5320 to 4429. [2021-11-13 18:21:27,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4429 states, 4214 states have (on average 1.7076411960132891) internal successors, (7196), 4236 states have internal predecessors, (7196), 146 states have call successors, (146), 49 states have call predecessors, (146), 67 states have return successors, (207), 151 states have call predecessors, (207), 144 states have call successors, (207) [2021-11-13 18:21:27,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4429 states to 4429 states and 7549 transitions. [2021-11-13 18:21:27,532 INFO L78 Accepts]: Start accepts. Automaton has 4429 states and 7549 transitions. Word has length 135 [2021-11-13 18:21:27,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:21:27,533 INFO L470 AbstractCegarLoop]: Abstraction has 4429 states and 7549 transitions. [2021-11-13 18:21:27,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:21:27,533 INFO L276 IsEmpty]: Start isEmpty. Operand 4429 states and 7549 transitions. [2021-11-13 18:21:27,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-13 18:21:27,536 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:21:27,536 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:21:27,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-13 18:21:27,537 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:21:27,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:21:27,537 INFO L85 PathProgramCache]: Analyzing trace with hash 37368905, now seen corresponding path program 1 times [2021-11-13 18:21:27,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:21:27,538 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651095331] [2021-11-13 18:21:27,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:21:27,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:21:27,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:27,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:21:27,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:27,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 18:21:27,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:27,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-13 18:21:27,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:27,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-13 18:21:27,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:27,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-11-13 18:21:27,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:27,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:21:27,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:21:27,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651095331] [2021-11-13 18:21:27,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651095331] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:21:27,660 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:21:27,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:21:27,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368030814] [2021-11-13 18:21:27,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:21:27,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:21:27,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:21:27,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:21:27,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:21:27,662 INFO L87 Difference]: Start difference. First operand 4429 states and 7549 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:21:28,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:21:28,966 INFO L93 Difference]: Finished difference Result 7585 states and 12529 transitions. [2021-11-13 18:21:28,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:21:28,966 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2021-11-13 18:21:28,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:21:28,982 INFO L225 Difference]: With dead ends: 7585 [2021-11-13 18:21:28,983 INFO L226 Difference]: Without dead ends: 5293 [2021-11-13 18:21:28,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:21:28,995 INFO L933 BasicCegarLoop]: 4377 mSDtfsCounter, 4848 mSDsluCounter, 12431 mSDsCounter, 0 mSdLazyCounter, 835 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 743.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4864 SdHoareTripleChecker+Valid, 16808 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 41.49ms SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 857.50ms IncrementalHoareTripleChecker+Time [2021-11-13 18:21:28,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4864 Valid, 16808 Invalid, 937 Unknown, 0 Unchecked, 41.49ms Time], IncrementalHoareTripleChecker [102 Valid, 835 Invalid, 0 Unknown, 0 Unchecked, 857.50ms Time] [2021-11-13 18:21:29,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5293 states. [2021-11-13 18:21:29,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5293 to 4429. [2021-11-13 18:21:29,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4429 states, 4214 states have (on average 1.7057427622211676) internal successors, (7188), 4236 states have internal predecessors, (7188), 146 states have call successors, (146), 49 states have call predecessors, (146), 67 states have return successors, (207), 151 states have call predecessors, (207), 144 states have call successors, (207) [2021-11-13 18:21:29,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4429 states to 4429 states and 7541 transitions. [2021-11-13 18:21:29,274 INFO L78 Accepts]: Start accepts. Automaton has 4429 states and 7541 transitions. Word has length 135 [2021-11-13 18:21:29,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:21:29,275 INFO L470 AbstractCegarLoop]: Abstraction has 4429 states and 7541 transitions. [2021-11-13 18:21:29,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:21:29,275 INFO L276 IsEmpty]: Start isEmpty. Operand 4429 states and 7541 transitions. [2021-11-13 18:21:29,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-13 18:21:29,278 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:21:29,279 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:21:29,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-13 18:21:29,279 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:21:29,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:21:29,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1269773493, now seen corresponding path program 1 times [2021-11-13 18:21:29,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:21:29,280 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133234088] [2021-11-13 18:21:29,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:21:29,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:21:29,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:29,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:21:29,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:29,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 18:21:29,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:29,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-13 18:21:29,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:29,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-13 18:21:29,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:29,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-11-13 18:21:29,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:29,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:21:29,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:21:29,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133234088] [2021-11-13 18:21:29,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133234088] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:21:29,451 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:21:29,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:21:29,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495070924] [2021-11-13 18:21:29,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:21:29,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:21:29,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:21:29,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:21:29,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:21:29,454 INFO L87 Difference]: Start difference. First operand 4429 states and 7541 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:21:30,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:21:30,839 INFO L93 Difference]: Finished difference Result 7558 states and 12451 transitions. [2021-11-13 18:21:30,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:21:30,840 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2021-11-13 18:21:30,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:21:30,857 INFO L225 Difference]: With dead ends: 7558 [2021-11-13 18:21:30,857 INFO L226 Difference]: Without dead ends: 5266 [2021-11-13 18:21:30,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:21:30,867 INFO L933 BasicCegarLoop]: 4373 mSDtfsCounter, 4728 mSDsluCounter, 16540 mSDsCounter, 0 mSdLazyCounter, 924 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 796.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4744 SdHoareTripleChecker+Valid, 20913 SdHoareTripleChecker+Invalid, 1002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 51.17ms SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 933.78ms IncrementalHoareTripleChecker+Time [2021-11-13 18:21:30,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4744 Valid, 20913 Invalid, 1002 Unknown, 0 Unchecked, 51.17ms Time], IncrementalHoareTripleChecker [78 Valid, 924 Invalid, 0 Unknown, 0 Unchecked, 933.78ms Time] [2021-11-13 18:21:30,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5266 states. [2021-11-13 18:21:31,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5266 to 4429. [2021-11-13 18:21:31,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4429 states, 4214 states have (on average 1.703844328429046) internal successors, (7180), 4236 states have internal predecessors, (7180), 146 states have call successors, (146), 49 states have call predecessors, (146), 67 states have return successors, (207), 151 states have call predecessors, (207), 144 states have call successors, (207) [2021-11-13 18:21:31,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4429 states to 4429 states and 7533 transitions. [2021-11-13 18:21:31,156 INFO L78 Accepts]: Start accepts. Automaton has 4429 states and 7533 transitions. Word has length 135 [2021-11-13 18:21:31,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:21:31,156 INFO L470 AbstractCegarLoop]: Abstraction has 4429 states and 7533 transitions. [2021-11-13 18:21:31,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:21:31,157 INFO L276 IsEmpty]: Start isEmpty. Operand 4429 states and 7533 transitions. [2021-11-13 18:21:31,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-13 18:21:31,160 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:21:31,160 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:21:31,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-13 18:21:31,161 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:21:31,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:21:31,161 INFO L85 PathProgramCache]: Analyzing trace with hash 627723273, now seen corresponding path program 1 times [2021-11-13 18:21:31,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:21:31,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456022342] [2021-11-13 18:21:31,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:21:31,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:21:31,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:31,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:21:31,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:31,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 18:21:31,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:31,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-13 18:21:31,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:31,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-13 18:21:31,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:31,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-11-13 18:21:31,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:31,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:21:31,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:21:31,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456022342] [2021-11-13 18:21:31,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456022342] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:21:31,297 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:21:31,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-13 18:21:31,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596508252] [2021-11-13 18:21:31,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:21:31,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:21:31,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:21:31,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:21:31,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:21:31,299 INFO L87 Difference]: Start difference. First operand 4429 states and 7533 transitions. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 6 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:21:34,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:21:34,536 INFO L93 Difference]: Finished difference Result 10689 states and 17405 transitions. [2021-11-13 18:21:34,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-13 18:21:34,537 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 6 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2021-11-13 18:21:34,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:21:34,559 INFO L225 Difference]: With dead ends: 10689 [2021-11-13 18:21:34,559 INFO L226 Difference]: Without dead ends: 8397 [2021-11-13 18:21:34,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-11-13 18:21:34,571 INFO L933 BasicCegarLoop]: 4621 mSDtfsCounter, 5069 mSDsluCounter, 21762 mSDsCounter, 0 mSdLazyCounter, 2088 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1719.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5084 SdHoareTripleChecker+Valid, 26383 SdHoareTripleChecker+Invalid, 2171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 72.68ms SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 2088 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1982.37ms IncrementalHoareTripleChecker+Time [2021-11-13 18:21:34,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5084 Valid, 26383 Invalid, 2171 Unknown, 0 Unchecked, 72.68ms Time], IncrementalHoareTripleChecker [83 Valid, 2088 Invalid, 0 Unknown, 0 Unchecked, 1982.37ms Time] [2021-11-13 18:21:34,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8397 states. [2021-11-13 18:21:35,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8397 to 6745. [2021-11-13 18:21:35,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6745 states, 6304 states have (on average 1.6468908629441625) internal successors, (10382), 6372 states have internal predecessors, (10382), 278 states have call successors, (278), 97 states have call predecessors, (278), 161 states have return successors, (531), 291 states have call predecessors, (531), 276 states have call successors, (531) [2021-11-13 18:21:35,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6745 states to 6745 states and 11191 transitions. [2021-11-13 18:21:35,045 INFO L78 Accepts]: Start accepts. Automaton has 6745 states and 11191 transitions. Word has length 135 [2021-11-13 18:21:35,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:21:35,046 INFO L470 AbstractCegarLoop]: Abstraction has 6745 states and 11191 transitions. [2021-11-13 18:21:35,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 6 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:21:35,046 INFO L276 IsEmpty]: Start isEmpty. Operand 6745 states and 11191 transitions. [2021-11-13 18:21:35,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-13 18:21:35,051 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:21:35,051 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:21:35,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-13 18:21:35,052 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:21:35,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:21:35,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1658764171, now seen corresponding path program 1 times [2021-11-13 18:21:35,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:21:35,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145115829] [2021-11-13 18:21:35,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:21:35,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:21:35,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:35,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:21:35,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:35,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 18:21:35,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:35,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-13 18:21:35,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:35,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-13 18:21:35,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:35,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-11-13 18:21:35,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:35,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:21:35,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:21:35,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145115829] [2021-11-13 18:21:35,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145115829] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:21:35,175 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:21:35,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 18:21:35,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447450475] [2021-11-13 18:21:35,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:21:35,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:21:35,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:21:35,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:21:35,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:21:35,177 INFO L87 Difference]: Start difference. First operand 6745 states and 11191 transitions. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 4 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:21:38,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:21:38,349 INFO L93 Difference]: Finished difference Result 18834 states and 30177 transitions. [2021-11-13 18:21:38,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 18:21:38,350 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 4 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2021-11-13 18:21:38,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:21:38,390 INFO L225 Difference]: With dead ends: 18834 [2021-11-13 18:21:38,390 INFO L226 Difference]: Without dead ends: 14227 [2021-11-13 18:21:38,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-13 18:21:38,411 INFO L933 BasicCegarLoop]: 4815 mSDtfsCounter, 5302 mSDsluCounter, 12807 mSDsCounter, 0 mSdLazyCounter, 1600 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1540.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5338 SdHoareTripleChecker+Valid, 17622 SdHoareTripleChecker+Invalid, 1707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 63.66ms SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1833.89ms IncrementalHoareTripleChecker+Time [2021-11-13 18:21:38,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5338 Valid, 17622 Invalid, 1707 Unknown, 0 Unchecked, 63.66ms Time], IncrementalHoareTripleChecker [107 Valid, 1600 Invalid, 0 Unknown, 0 Unchecked, 1833.89ms Time] [2021-11-13 18:21:38,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14227 states. [2021-11-13 18:21:39,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14227 to 11187. [2021-11-13 18:21:39,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11187 states, 10313 states have (on average 1.5947832832347522) internal successors, (16447), 10462 states have internal predecessors, (16447), 550 states have call successors, (550), 193 states have call predecessors, (550), 322 states have return successors, (1043), 547 states have call predecessors, (1043), 548 states have call successors, (1043) [2021-11-13 18:21:39,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11187 states to 11187 states and 18040 transitions. [2021-11-13 18:21:39,257 INFO L78 Accepts]: Start accepts. Automaton has 11187 states and 18040 transitions. Word has length 135 [2021-11-13 18:21:39,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:21:39,258 INFO L470 AbstractCegarLoop]: Abstraction has 11187 states and 18040 transitions. [2021-11-13 18:21:39,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 4 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:21:39,259 INFO L276 IsEmpty]: Start isEmpty. Operand 11187 states and 18040 transitions. [2021-11-13 18:21:39,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-11-13 18:21:39,281 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:21:39,282 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:21:39,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-13 18:21:39,282 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:21:39,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:21:39,283 INFO L85 PathProgramCache]: Analyzing trace with hash -329166095, now seen corresponding path program 1 times [2021-11-13 18:21:39,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:21:39,283 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569369695] [2021-11-13 18:21:39,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:21:39,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:21:39,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:39,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:21:39,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:39,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 18:21:39,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:39,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-13 18:21:39,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:39,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-13 18:21:39,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:39,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-11-13 18:21:39,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:39,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-11-13 18:21:39,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:39,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:21:39,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:39,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2021-11-13 18:21:39,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:39,466 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-13 18:21:39,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:21:39,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569369695] [2021-11-13 18:21:39,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569369695] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:21:39,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602382743] [2021-11-13 18:21:39,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:21:39,468 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:21:39,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38629ab8-bcab-495c-898c-20f2fd474d48/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:21:39,470 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38629ab8-bcab-495c-898c-20f2fd474d48/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:21:39,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38629ab8-bcab-495c-898c-20f2fd474d48/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 18:21:39,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:39,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 924 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:21:39,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:21:40,303 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-13 18:21:40,303 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:21:40,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602382743] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:21:40,306 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:21:40,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-11-13 18:21:40,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252301984] [2021-11-13 18:21:40,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:21:40,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:21:40,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:21:40,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:21:40,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:21:40,311 INFO L87 Difference]: Start difference. First operand 11187 states and 18040 transitions. Second operand has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 2 states have internal predecessors, (182), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 18:21:41,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:21:41,683 INFO L93 Difference]: Finished difference Result 29172 states and 46308 transitions. [2021-11-13 18:21:41,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:21:41,683 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 2 states have internal predecessors, (182), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 219 [2021-11-13 18:21:41,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:21:41,732 INFO L225 Difference]: With dead ends: 29172 [2021-11-13 18:21:41,733 INFO L226 Difference]: Without dead ends: 20123 [2021-11-13 18:21:41,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:21:41,759 INFO L933 BasicCegarLoop]: 4399 mSDtfsCounter, 4293 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4293 SdHoareTripleChecker+Valid, 4790 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.00ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.89ms IncrementalHoareTripleChecker+Time [2021-11-13 18:21:41,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4293 Valid, 4790 Invalid, 12 Unknown, 0 Unchecked, 8.00ms Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 8.89ms Time] [2021-11-13 18:21:41,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20123 states. [2021-11-13 18:21:43,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20123 to 20055. [2021-11-13 18:21:43,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20055 states, 18331 states have (on average 1.5633080573891223) internal successors, (28657), 18626 states have internal predecessors, (28657), 1078 states have call successors, (1078), 385 states have call predecessors, (1078), 644 states have return successors, (2051), 1059 states have call predecessors, (2051), 1076 states have call successors, (2051) [2021-11-13 18:21:43,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20055 states to 20055 states and 31786 transitions. [2021-11-13 18:21:43,454 INFO L78 Accepts]: Start accepts. Automaton has 20055 states and 31786 transitions. Word has length 219 [2021-11-13 18:21:43,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:21:43,455 INFO L470 AbstractCegarLoop]: Abstraction has 20055 states and 31786 transitions. [2021-11-13 18:21:43,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 2 states have internal predecessors, (182), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 18:21:43,455 INFO L276 IsEmpty]: Start isEmpty. Operand 20055 states and 31786 transitions. [2021-11-13 18:21:43,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-11-13 18:21:43,495 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:21:43,496 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:21:43,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38629ab8-bcab-495c-898c-20f2fd474d48/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 18:21:43,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38629ab8-bcab-495c-898c-20f2fd474d48/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:21:43,715 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:21:43,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:21:43,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1597320495, now seen corresponding path program 1 times [2021-11-13 18:21:43,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:21:43,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965017580] [2021-11-13 18:21:43,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:21:43,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:21:43,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:43,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:21:43,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:43,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 18:21:43,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:43,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-13 18:21:43,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:43,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-13 18:21:43,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:43,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-11-13 18:21:43,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:43,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-11-13 18:21:43,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:43,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:21:43,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:43,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2021-11-13 18:21:43,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:43,899 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-13 18:21:43,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:21:43,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965017580] [2021-11-13 18:21:43,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965017580] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:21:43,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607504060] [2021-11-13 18:21:43,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:21:43,900 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:21:43,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38629ab8-bcab-495c-898c-20f2fd474d48/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:21:43,901 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38629ab8-bcab-495c-898c-20f2fd474d48/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:21:43,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38629ab8-bcab-495c-898c-20f2fd474d48/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 18:21:44,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:44,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 918 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:21:44,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:21:44,499 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-13 18:21:44,499 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:21:44,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607504060] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:21:44,499 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:21:44,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-11-13 18:21:44,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339093799] [2021-11-13 18:21:44,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:21:44,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:21:44,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:21:44,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:21:44,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:21:44,502 INFO L87 Difference]: Start difference. First operand 20055 states and 31786 transitions. Second operand has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 2 states have internal predecessors, (170), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 18:21:47,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:21:47,063 INFO L93 Difference]: Finished difference Result 55568 states and 87546 transitions. [2021-11-13 18:21:47,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:21:47,064 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 2 states have internal predecessors, (170), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 219 [2021-11-13 18:21:47,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:21:47,147 INFO L225 Difference]: With dead ends: 55568 [2021-11-13 18:21:47,147 INFO L226 Difference]: Without dead ends: 37651 [2021-11-13 18:21:47,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:21:47,195 INFO L933 BasicCegarLoop]: 4399 mSDtfsCounter, 4305 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4305 SdHoareTripleChecker+Valid, 4790 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.70ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.98ms IncrementalHoareTripleChecker+Time [2021-11-13 18:21:47,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4305 Valid, 4790 Invalid, 12 Unknown, 0 Unchecked, 7.70ms Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 13.98ms Time] [2021-11-13 18:21:47,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37651 states. [2021-11-13 18:21:50,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37651 to 37519. [2021-11-13 18:21:50,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37519 states, 34143 states have (on average 1.54517763524002) internal successors, (52757), 34730 states have internal predecessors, (52757), 2086 states have call successors, (2086), 769 states have call predecessors, (2086), 1288 states have return successors, (4019), 2035 states have call predecessors, (4019), 2084 states have call successors, (4019) [2021-11-13 18:21:50,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37519 states to 37519 states and 58862 transitions. [2021-11-13 18:21:50,354 INFO L78 Accepts]: Start accepts. Automaton has 37519 states and 58862 transitions. Word has length 219 [2021-11-13 18:21:50,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:21:50,354 INFO L470 AbstractCegarLoop]: Abstraction has 37519 states and 58862 transitions. [2021-11-13 18:21:50,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 2 states have internal predecessors, (170), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 18:21:50,355 INFO L276 IsEmpty]: Start isEmpty. Operand 37519 states and 58862 transitions. [2021-11-13 18:21:50,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-11-13 18:21:50,414 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:21:50,414 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:21:50,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38629ab8-bcab-495c-898c-20f2fd474d48/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 18:21:50,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38629ab8-bcab-495c-898c-20f2fd474d48/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:21:50,640 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:21:50,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:21:50,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1298955599, now seen corresponding path program 1 times [2021-11-13 18:21:50,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:21:50,640 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003942741] [2021-11-13 18:21:50,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:21:50,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:21:50,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:50,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:21:50,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:50,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 18:21:50,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:50,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-13 18:21:50,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:50,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-13 18:21:50,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:50,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-11-13 18:21:50,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:50,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-11-13 18:21:50,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:50,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:21:50,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:50,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2021-11-13 18:21:50,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:50,871 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-13 18:21:50,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:21:50,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003942741] [2021-11-13 18:21:50,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003942741] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:21:50,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675416674] [2021-11-13 18:21:50,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:21:50,872 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:21:50,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38629ab8-bcab-495c-898c-20f2fd474d48/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:21:50,875 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38629ab8-bcab-495c-898c-20f2fd474d48/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:21:50,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38629ab8-bcab-495c-898c-20f2fd474d48/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 18:21:51,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:51,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 912 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:21:51,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:21:51,514 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-13 18:21:51,514 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:21:51,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675416674] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:21:51,515 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:21:51,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-11-13 18:21:51,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417248396] [2021-11-13 18:21:51,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:21:51,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:21:51,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:21:51,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:21:51,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:21:51,527 INFO L87 Difference]: Start difference. First operand 37519 states and 58862 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 18:21:56,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:21:56,764 INFO L93 Difference]: Finished difference Result 107640 states and 168886 transitions. [2021-11-13 18:21:56,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:21:56,764 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 219 [2021-11-13 18:21:56,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:21:57,000 INFO L225 Difference]: With dead ends: 107640 [2021-11-13 18:21:57,000 INFO L226 Difference]: Without dead ends: 72259 [2021-11-13 18:21:57,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:21:57,082 INFO L933 BasicCegarLoop]: 4399 mSDtfsCounter, 4323 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4323 SdHoareTripleChecker+Valid, 4790 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.35ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.30ms IncrementalHoareTripleChecker+Time [2021-11-13 18:21:57,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4323 Valid, 4790 Invalid, 12 Unknown, 0 Unchecked, 8.35ms Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 8.30ms Time] [2021-11-13 18:21:57,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72259 states. [2021-11-13 18:22:03,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72259 to 71999. [2021-11-13 18:22:03,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71999 states, 65383 states have (on average 1.5352767538962728) internal successors, (100381), 66554 states have internal predecessors, (100381), 4038 states have call successors, (4038), 1537 states have call predecessors, (4038), 2576 states have return successors, (7891), 3923 states have call predecessors, (7891), 4036 states have call successors, (7891) [2021-11-13 18:22:03,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71999 states to 71999 states and 112310 transitions. [2021-11-13 18:22:03,266 INFO L78 Accepts]: Start accepts. Automaton has 71999 states and 112310 transitions. Word has length 219 [2021-11-13 18:22:03,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:22:03,266 INFO L470 AbstractCegarLoop]: Abstraction has 71999 states and 112310 transitions. [2021-11-13 18:22:03,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 18:22:03,267 INFO L276 IsEmpty]: Start isEmpty. Operand 71999 states and 112310 transitions. [2021-11-13 18:22:03,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-11-13 18:22:03,326 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:22:03,326 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:22:03,537 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38629ab8-bcab-495c-898c-20f2fd474d48/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forcibly destroying the process [2021-11-13 18:22:03,545 WARN L724 oredProcess$PipePump]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38629ab8-bcab-495c-898c-20f2fd474d48/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] The stream was forcibly closed: stdIn [2021-11-13 18:22:03,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38629ab8-bcab-495c-898c-20f2fd474d48/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-13 18:22:03,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38629ab8-bcab-495c-898c-20f2fd474d48/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-13 18:22:03,560 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:22:03,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:22:03,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1346632337, now seen corresponding path program 1 times [2021-11-13 18:22:03,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:22:03,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339943351] [2021-11-13 18:22:03,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:22:03,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:22:03,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:03,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:22:03,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:03,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 18:22:03,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:03,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-13 18:22:03,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:03,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-13 18:22:03,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:03,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-11-13 18:22:03,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:03,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-11-13 18:22:03,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:03,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:22:03,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:03,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2021-11-13 18:22:03,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:03,817 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-13 18:22:03,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:22:03,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339943351] [2021-11-13 18:22:03,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339943351] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:22:03,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615508476] [2021-11-13 18:22:03,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:22:03,819 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:22:03,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38629ab8-bcab-495c-898c-20f2fd474d48/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:22:03,820 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38629ab8-bcab-495c-898c-20f2fd474d48/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:22:03,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38629ab8-bcab-495c-898c-20f2fd474d48/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-13 18:22:04,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:04,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:22:04,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:22:04,406 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-13 18:22:04,406 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:22:04,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615508476] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:22:04,407 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:22:04,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-11-13 18:22:04,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401238615] [2021-11-13 18:22:04,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:22:04,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:22:04,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:22:04,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:22:04,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:22:04,409 INFO L87 Difference]: Start difference. First operand 71999 states and 112310 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 2 states have internal predecessors, (158), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 18:22:14,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:22:14,844 INFO L93 Difference]: Finished difference Result 210440 states and 329390 transitions. [2021-11-13 18:22:14,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:22:14,845 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 2 states have internal predecessors, (158), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 219 [2021-11-13 18:22:14,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:22:15,239 INFO L225 Difference]: With dead ends: 210440 [2021-11-13 18:22:15,240 INFO L226 Difference]: Without dead ends: 140579 [2021-11-13 18:22:15,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:22:15,643 INFO L933 BasicCegarLoop]: 4399 mSDtfsCounter, 4317 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4317 SdHoareTripleChecker+Valid, 4790 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.80ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.88ms IncrementalHoareTripleChecker+Time [2021-11-13 18:22:15,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4317 Valid, 4790 Invalid, 12 Unknown, 0 Unchecked, 8.80ms Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 20.88ms Time] [2021-11-13 18:22:15,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140579 states.