./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec27_product13.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd96e46-972d-48ba-85fa-22fdf0968d32/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd96e46-972d-48ba-85fa-22fdf0968d32/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd96e46-972d-48ba-85fa-22fdf0968d32/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd96e46-972d-48ba-85fa-22fdf0968d32/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec27_product13.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd96e46-972d-48ba-85fa-22fdf0968d32/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd96e46-972d-48ba-85fa-22fdf0968d32/bin/uautomizer-IVEQpCNsaX --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 102266cd9873aec631509424dd889c2e48b781667738cfaa50930481a41b1570 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 10:43:22,753 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 10:43:22,756 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 10:43:22,802 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 10:43:22,802 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 10:43:22,806 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 10:43:22,808 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 10:43:22,812 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 10:43:22,815 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 10:43:22,823 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 10:43:22,824 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 10:43:22,826 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 10:43:22,826 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 10:43:22,830 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 10:43:22,833 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 10:43:22,839 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 10:43:22,841 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 10:43:22,842 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 10:43:22,845 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 10:43:22,855 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 10:43:22,857 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 10:43:22,858 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 10:43:22,862 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 10:43:22,863 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 10:43:22,873 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 10:43:22,873 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 10:43:22,873 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 10:43:22,876 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 10:43:22,877 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 10:43:22,878 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 10:43:22,879 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 10:43:22,880 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 10:43:22,882 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 10:43:22,883 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 10:43:22,884 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 10:43:22,884 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 10:43:22,885 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 10:43:22,885 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 10:43:22,886 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 10:43:22,887 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 10:43:22,887 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 10:43:22,888 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd96e46-972d-48ba-85fa-22fdf0968d32/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 10:43:22,916 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 10:43:22,917 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 10:43:22,917 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 10:43:22,917 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 10:43:22,929 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 10:43:22,929 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 10:43:22,929 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 10:43:22,929 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 10:43:22,930 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 10:43:22,930 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 10:43:22,930 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 10:43:22,930 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 10:43:22,930 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 10:43:22,931 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 10:43:22,931 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 10:43:22,931 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 10:43:22,931 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 10:43:22,931 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 10:43:22,932 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 10:43:22,932 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 10:43:22,932 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 10:43:22,932 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 10:43:22,933 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 10:43:22,933 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 10:43:22,933 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 10:43:22,933 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 10:43:22,933 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 10:43:22,934 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 10:43:22,934 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 10:43:22,934 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 10:43:22,934 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 10:43:22,934 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 10:43:22,935 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_fcd96e46-972d-48ba-85fa-22fdf0968d32/bin/uautomizer-IVEQpCNsaX/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd96e46-972d-48ba-85fa-22fdf0968d32/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 102266cd9873aec631509424dd889c2e48b781667738cfaa50930481a41b1570 [2021-11-09 10:43:23,206 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 10:43:23,234 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 10:43:23,237 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 10:43:23,240 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 10:43:23,240 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 10:43:23,241 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd96e46-972d-48ba-85fa-22fdf0968d32/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/product-lines/email_spec27_product13.cil.c [2021-11-09 10:43:23,323 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd96e46-972d-48ba-85fa-22fdf0968d32/bin/uautomizer-IVEQpCNsaX/data/788496f24/962bc4393a01419eaaf4976259e84c18/FLAG589e5e1af [2021-11-09 10:43:23,923 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 10:43:23,924 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd96e46-972d-48ba-85fa-22fdf0968d32/sv-benchmarks/c/product-lines/email_spec27_product13.cil.c [2021-11-09 10:43:23,949 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd96e46-972d-48ba-85fa-22fdf0968d32/bin/uautomizer-IVEQpCNsaX/data/788496f24/962bc4393a01419eaaf4976259e84c18/FLAG589e5e1af [2021-11-09 10:43:24,188 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd96e46-972d-48ba-85fa-22fdf0968d32/bin/uautomizer-IVEQpCNsaX/data/788496f24/962bc4393a01419eaaf4976259e84c18 [2021-11-09 10:43:24,191 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 10:43:24,192 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 10:43:24,194 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 10:43:24,194 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 10:43:24,197 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 10:43:24,198 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:43:24" (1/1) ... [2021-11-09 10:43:24,199 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a397b23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:43:24, skipping insertion in model container [2021-11-09 10:43:24,200 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:43:24" (1/1) ... [2021-11-09 10:43:24,207 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 10:43:24,278 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 10:43:24,878 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_fcd96e46-972d-48ba-85fa-22fdf0968d32/sv-benchmarks/c/product-lines/email_spec27_product13.cil.c[61687,61700] [2021-11-09 10:43:24,881 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 10:43:24,893 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 10:43:25,012 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_fcd96e46-972d-48ba-85fa-22fdf0968d32/sv-benchmarks/c/product-lines/email_spec27_product13.cil.c[61687,61700] [2021-11-09 10:43:25,012 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 10:43:25,055 INFO L208 MainTranslator]: Completed translation [2021-11-09 10:43:25,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:43:25 WrapperNode [2021-11-09 10:43:25,057 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 10:43:25,058 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 10:43:25,058 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 10:43:25,058 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 10:43:25,064 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:43:25" (1/1) ... [2021-11-09 10:43:25,091 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:43:25" (1/1) ... [2021-11-09 10:43:25,204 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 10:43:25,205 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 10:43:25,205 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 10:43:25,205 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 10:43:25,213 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:43:25" (1/1) ... [2021-11-09 10:43:25,214 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:43:25" (1/1) ... [2021-11-09 10:43:25,223 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:43:25" (1/1) ... [2021-11-09 10:43:25,223 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:43:25" (1/1) ... [2021-11-09 10:43:25,268 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:43:25" (1/1) ... [2021-11-09 10:43:25,300 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:43:25" (1/1) ... [2021-11-09 10:43:25,305 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:43:25" (1/1) ... [2021-11-09 10:43:25,334 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 10:43:25,335 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 10:43:25,335 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 10:43:25,335 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 10:43:25,336 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:43:25" (1/1) ... [2021-11-09 10:43:25,342 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 10:43:25,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd96e46-972d-48ba-85fa-22fdf0968d32/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:25,376 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd96e46-972d-48ba-85fa-22fdf0968d32/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 10:43:25,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd96e46-972d-48ba-85fa-22fdf0968d32/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 10:43:25,426 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-09 10:43:25,427 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 10:43:25,427 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 10:43:25,427 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 10:43:25,427 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 10:43:27,447 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 10:43:27,447 INFO L299 CfgBuilder]: Removed 239 assume(true) statements. [2021-11-09 10:43:27,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:43:27 BoogieIcfgContainer [2021-11-09 10:43:27,451 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 10:43:27,453 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 10:43:27,453 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 10:43:27,457 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 10:43:27,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 10:43:24" (1/3) ... [2021-11-09 10:43:27,458 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@233b7b51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:43:27, skipping insertion in model container [2021-11-09 10:43:27,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:43:25" (2/3) ... [2021-11-09 10:43:27,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@233b7b51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:43:27, skipping insertion in model container [2021-11-09 10:43:27,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:43:27" (3/3) ... [2021-11-09 10:43:27,461 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec27_product13.cil.c [2021-11-09 10:43:27,470 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 10:43:27,471 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-09 10:43:27,541 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 10:43:27,549 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 [2021-11-09 10:43:27,549 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-09 10:43:27,581 INFO L276 IsEmpty]: Start isEmpty. Operand has 401 states, 398 states have (on average 1.7763819095477387) internal successors, (707), 400 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:27,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-09 10:43:27,595 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:43:27,595 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:43:27,596 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:43:27,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:27,601 INFO L85 PathProgramCache]: Analyzing trace with hash -194309687, now seen corresponding path program 1 times [2021-11-09 10:43:27,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:27,610 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197786972] [2021-11-09 10:43:27,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:27,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:27,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:28,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:43:28,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:28,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197786972] [2021-11-09 10:43:28,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197786972] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:43:28,059 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:43:28,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:43:28,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817658434] [2021-11-09 10:43:28,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:43:28,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:28,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:43:28,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:43:28,085 INFO L87 Difference]: Start difference. First operand has 401 states, 398 states have (on average 1.7763819095477387) internal successors, (707), 400 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:28,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:43:28,250 INFO L93 Difference]: Finished difference Result 1168 states and 2063 transitions. [2021-11-09 10:43:28,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:43:28,256 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-09 10:43:28,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:43:28,280 INFO L225 Difference]: With dead ends: 1168 [2021-11-09 10:43:28,280 INFO L226 Difference]: Without dead ends: 772 [2021-11-09 10:43:28,285 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:43:28,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2021-11-09 10:43:28,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 395. [2021-11-09 10:43:28,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 393 states have (on average 1.7582697201017812) internal successors, (691), 394 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:28,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 691 transitions. [2021-11-09 10:43:28,393 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 691 transitions. Word has length 48 [2021-11-09 10:43:28,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:43:28,402 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 691 transitions. [2021-11-09 10:43:28,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:28,403 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 691 transitions. [2021-11-09 10:43:28,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-09 10:43:28,407 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:43:28,408 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:43:28,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 10:43:28,408 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:43:28,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:28,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1702143685, now seen corresponding path program 1 times [2021-11-09 10:43:28,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:28,410 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60861918] [2021-11-09 10:43:28,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:28,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:28,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:28,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:43:28,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:28,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60861918] [2021-11-09 10:43:28,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60861918] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:43:28,581 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:43:28,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 10:43:28,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680126216] [2021-11-09 10:43:28,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 10:43:28,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:28,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 10:43:28,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:43:28,584 INFO L87 Difference]: Start difference. First operand 395 states and 691 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:28,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:43:28,754 INFO L93 Difference]: Finished difference Result 1134 states and 1989 transitions. [2021-11-09 10:43:28,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 10:43:28,754 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-09 10:43:28,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:43:28,760 INFO L225 Difference]: With dead ends: 1134 [2021-11-09 10:43:28,760 INFO L226 Difference]: Without dead ends: 758 [2021-11-09 10:43:28,762 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-09 10:43:28,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2021-11-09 10:43:28,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 395. [2021-11-09 10:43:28,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 393 states have (on average 1.7557251908396947) internal successors, (690), 394 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:28,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 690 transitions. [2021-11-09 10:43:28,795 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 690 transitions. Word has length 50 [2021-11-09 10:43:28,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:43:28,795 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 690 transitions. [2021-11-09 10:43:28,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:28,796 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 690 transitions. [2021-11-09 10:43:28,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-09 10:43:28,799 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:43:28,799 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:43:28,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 10:43:28,799 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:43:28,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:28,800 INFO L85 PathProgramCache]: Analyzing trace with hash 182544200, now seen corresponding path program 1 times [2021-11-09 10:43:28,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:28,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321088797] [2021-11-09 10:43:28,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:28,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:28,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:28,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:43:28,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:28,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321088797] [2021-11-09 10:43:28,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321088797] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:43:28,906 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:43:28,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:43:28,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461664882] [2021-11-09 10:43:28,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:43:28,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:28,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:43:28,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:43:28,908 INFO L87 Difference]: Start difference. First operand 395 states and 690 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:28,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:43:28,948 INFO L93 Difference]: Finished difference Result 772 states and 1354 transitions. [2021-11-09 10:43:28,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:43:28,948 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-09 10:43:28,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:43:28,951 INFO L225 Difference]: With dead ends: 772 [2021-11-09 10:43:28,952 INFO L226 Difference]: Without dead ends: 400 [2021-11-09 10:43:28,953 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:43:28,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-11-09 10:43:29,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 395. [2021-11-09 10:43:29,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 393 states have (on average 1.7531806615776082) internal successors, (689), 394 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:29,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 689 transitions. [2021-11-09 10:43:29,006 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 689 transitions. Word has length 51 [2021-11-09 10:43:29,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:43:29,006 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 689 transitions. [2021-11-09 10:43:29,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:29,007 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 689 transitions. [2021-11-09 10:43:29,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-09 10:43:29,009 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:43:29,009 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:43:29,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-09 10:43:29,009 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:43:29,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:29,010 INFO L85 PathProgramCache]: Analyzing trace with hash -379903346, now seen corresponding path program 1 times [2021-11-09 10:43:29,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:29,010 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287198181] [2021-11-09 10:43:29,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:29,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:29,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:29,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:43:29,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:29,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287198181] [2021-11-09 10:43:29,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287198181] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:43:29,111 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:43:29,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:43:29,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496369206] [2021-11-09 10:43:29,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:43:29,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:29,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:43:29,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:43:29,113 INFO L87 Difference]: Start difference. First operand 395 states and 689 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:29,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:43:29,159 INFO L93 Difference]: Finished difference Result 782 states and 1367 transitions. [2021-11-09 10:43:29,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:43:29,159 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-09 10:43:29,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:43:29,163 INFO L225 Difference]: With dead ends: 782 [2021-11-09 10:43:29,163 INFO L226 Difference]: Without dead ends: 395 [2021-11-09 10:43:29,165 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:43:29,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-11-09 10:43:29,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 395. [2021-11-09 10:43:29,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 393 states have (on average 1.748091603053435) internal successors, (687), 394 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:29,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 687 transitions. [2021-11-09 10:43:29,185 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 687 transitions. Word has length 52 [2021-11-09 10:43:29,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:43:29,187 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 687 transitions. [2021-11-09 10:43:29,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:29,187 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 687 transitions. [2021-11-09 10:43:29,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-09 10:43:29,188 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:43:29,189 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:43:29,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-09 10:43:29,189 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:43:29,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:29,191 INFO L85 PathProgramCache]: Analyzing trace with hash 525658595, now seen corresponding path program 1 times [2021-11-09 10:43:29,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:29,192 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648441325] [2021-11-09 10:43:29,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:29,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:29,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:29,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:43:29,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:29,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648441325] [2021-11-09 10:43:29,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648441325] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:43:29,297 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:43:29,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 10:43:29,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110546079] [2021-11-09 10:43:29,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 10:43:29,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:29,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 10:43:29,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:43:29,299 INFO L87 Difference]: Start difference. First operand 395 states and 687 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:29,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:43:29,441 INFO L93 Difference]: Finished difference Result 1124 states and 1969 transitions. [2021-11-09 10:43:29,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 10:43:29,442 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-09 10:43:29,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:43:29,447 INFO L225 Difference]: With dead ends: 1124 [2021-11-09 10:43:29,448 INFO L226 Difference]: Without dead ends: 756 [2021-11-09 10:43:29,449 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-09 10:43:29,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2021-11-09 10:43:29,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 395. [2021-11-09 10:43:29,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 393 states have (on average 1.7455470737913485) internal successors, (686), 394 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:29,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 686 transitions. [2021-11-09 10:43:29,498 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 686 transitions. Word has length 53 [2021-11-09 10:43:29,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:43:29,498 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 686 transitions. [2021-11-09 10:43:29,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:29,499 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 686 transitions. [2021-11-09 10:43:29,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-09 10:43:29,501 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:43:29,501 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:43:29,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-09 10:43:29,502 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:43:29,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:29,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1855605702, now seen corresponding path program 1 times [2021-11-09 10:43:29,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:29,503 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215254044] [2021-11-09 10:43:29,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:29,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:29,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:29,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:43:29,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:29,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215254044] [2021-11-09 10:43:29,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215254044] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:43:29,618 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:43:29,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 10:43:29,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813302004] [2021-11-09 10:43:29,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 10:43:29,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:29,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 10:43:29,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:43:29,625 INFO L87 Difference]: Start difference. First operand 395 states and 686 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:29,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:43:29,767 INFO L93 Difference]: Finished difference Result 1129 states and 1974 transitions. [2021-11-09 10:43:29,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 10:43:29,768 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-09 10:43:29,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:43:29,779 INFO L225 Difference]: With dead ends: 1129 [2021-11-09 10:43:29,780 INFO L226 Difference]: Without dead ends: 761 [2021-11-09 10:43:29,781 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-09 10:43:29,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2021-11-09 10:43:29,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 395. [2021-11-09 10:43:29,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 393 states have (on average 1.743002544529262) internal successors, (685), 394 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:29,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 685 transitions. [2021-11-09 10:43:29,809 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 685 transitions. Word has length 54 [2021-11-09 10:43:29,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:43:29,809 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 685 transitions. [2021-11-09 10:43:29,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:29,809 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 685 transitions. [2021-11-09 10:43:29,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-09 10:43:29,811 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:43:29,811 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:43:29,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-09 10:43:29,812 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:43:29,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:29,812 INFO L85 PathProgramCache]: Analyzing trace with hash 966785758, now seen corresponding path program 1 times [2021-11-09 10:43:29,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:29,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417031091] [2021-11-09 10:43:29,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:29,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:29,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:29,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:43:29,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:29,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417031091] [2021-11-09 10:43:29,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417031091] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:43:29,900 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:43:29,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:43:29,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135871033] [2021-11-09 10:43:29,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:43:29,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:29,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:43:29,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:43:29,902 INFO L87 Difference]: Start difference. First operand 395 states and 685 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:29,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:43:29,930 INFO L93 Difference]: Finished difference Result 556 states and 953 transitions. [2021-11-09 10:43:29,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:43:29,930 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-09 10:43:29,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:43:29,934 INFO L225 Difference]: With dead ends: 556 [2021-11-09 10:43:29,934 INFO L226 Difference]: Without dead ends: 398 [2021-11-09 10:43:29,935 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:43:29,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-11-09 10:43:29,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 397. [2021-11-09 10:43:29,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 395 states have (on average 1.7392405063291139) internal successors, (687), 396 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:29,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 687 transitions. [2021-11-09 10:43:29,972 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 687 transitions. Word has length 55 [2021-11-09 10:43:29,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:43:29,974 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 687 transitions. [2021-11-09 10:43:29,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:29,975 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 687 transitions. [2021-11-09 10:43:29,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-09 10:43:29,976 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:43:29,976 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-09 10:43:29,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-09 10:43:29,977 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:43:29,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:29,977 INFO L85 PathProgramCache]: Analyzing trace with hash 137653724, now seen corresponding path program 1 times [2021-11-09 10:43:29,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:29,978 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910792509] [2021-11-09 10:43:29,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:29,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:30,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:30,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:43:30,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:30,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910792509] [2021-11-09 10:43:30,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910792509] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:43:30,072 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:43:30,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:43:30,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27204928] [2021-11-09 10:43:30,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:43:30,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:30,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:43:30,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:43:30,079 INFO L87 Difference]: Start difference. First operand 397 states and 687 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:30,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:43:30,129 INFO L93 Difference]: Finished difference Result 1077 states and 1885 transitions. [2021-11-09 10:43:30,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:43:30,130 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-09 10:43:30,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:43:30,135 INFO L225 Difference]: With dead ends: 1077 [2021-11-09 10:43:30,135 INFO L226 Difference]: Without dead ends: 711 [2021-11-09 10:43:30,137 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:43:30,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2021-11-09 10:43:30,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 553. [2021-11-09 10:43:30,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 551 states have (on average 1.765880217785844) internal successors, (973), 552 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:30,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 973 transitions. [2021-11-09 10:43:30,175 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 973 transitions. Word has length 61 [2021-11-09 10:43:30,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:43:30,176 INFO L470 AbstractCegarLoop]: Abstraction has 553 states and 973 transitions. [2021-11-09 10:43:30,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:30,176 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 973 transitions. [2021-11-09 10:43:30,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-09 10:43:30,178 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:43:30,178 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-09 10:43:30,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-09 10:43:30,179 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:43:30,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:30,179 INFO L85 PathProgramCache]: Analyzing trace with hash -193202821, now seen corresponding path program 1 times [2021-11-09 10:43:30,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:30,180 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845844023] [2021-11-09 10:43:30,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:30,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:30,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:30,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:43:30,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:30,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845844023] [2021-11-09 10:43:30,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845844023] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:30,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317668057] [2021-11-09 10:43:30,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:30,267 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:43:30,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd96e46-972d-48ba-85fa-22fdf0968d32/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:30,271 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd96e46-972d-48ba-85fa-22fdf0968d32/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:43:30,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd96e46-972d-48ba-85fa-22fdf0968d32/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 10:43:30,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:30,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 907 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 10:43:30,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:43:30,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:43:30,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317668057] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:30,810 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:43:30,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-11-09 10:43:30,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929534718] [2021-11-09 10:43:30,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 10:43:30,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:30,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 10:43:30,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:43:30,812 INFO L87 Difference]: Start difference. First operand 553 states and 973 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:30,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:43:30,884 INFO L93 Difference]: Finished difference Result 1081 states and 1888 transitions. [2021-11-09 10:43:30,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:43:30,885 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-09 10:43:30,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:43:30,891 INFO L225 Difference]: With dead ends: 1081 [2021-11-09 10:43:30,892 INFO L226 Difference]: Without dead ends: 923 [2021-11-09 10:43:30,892 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:43:30,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2021-11-09 10:43:30,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 763. [2021-11-09 10:43:30,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 763 states, 761 states have (on average 1.7818659658344285) internal successors, (1356), 762 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:30,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 1356 transitions. [2021-11-09 10:43:30,944 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 1356 transitions. Word has length 62 [2021-11-09 10:43:30,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:43:30,945 INFO L470 AbstractCegarLoop]: Abstraction has 763 states and 1356 transitions. [2021-11-09 10:43:30,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:30,945 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 1356 transitions. [2021-11-09 10:43:30,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-09 10:43:30,948 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:43:30,948 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:43:30,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd96e46-972d-48ba-85fa-22fdf0968d32/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 10:43:31,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd96e46-972d-48ba-85fa-22fdf0968d32/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:43:31,171 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:43:31,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:31,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1215668562, now seen corresponding path program 1 times [2021-11-09 10:43:31,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:31,171 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680968706] [2021-11-09 10:43:31,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:31,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:31,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:31,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:43:31,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:31,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680968706] [2021-11-09 10:43:31,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680968706] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:43:31,256 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:43:31,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:43:31,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562639185] [2021-11-09 10:43:31,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:43:31,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:31,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:43:31,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:43:31,265 INFO L87 Difference]: Start difference. First operand 763 states and 1356 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:31,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:43:31,365 INFO L93 Difference]: Finished difference Result 1959 states and 3499 transitions. [2021-11-09 10:43:31,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:43:31,366 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-09 10:43:31,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:43:31,375 INFO L225 Difference]: With dead ends: 1959 [2021-11-09 10:43:31,375 INFO L226 Difference]: Without dead ends: 1285 [2021-11-09 10:43:31,377 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:43:31,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1285 states. [2021-11-09 10:43:31,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1285 to 1127. [2021-11-09 10:43:31,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1127 states, 1125 states have (on average 1.7955555555555556) internal successors, (2020), 1126 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:31,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1127 states to 1127 states and 2020 transitions. [2021-11-09 10:43:31,464 INFO L78 Accepts]: Start accepts. Automaton has 1127 states and 2020 transitions. Word has length 68 [2021-11-09 10:43:31,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:43:31,465 INFO L470 AbstractCegarLoop]: Abstraction has 1127 states and 2020 transitions. [2021-11-09 10:43:31,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:31,465 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states and 2020 transitions. [2021-11-09 10:43:31,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-09 10:43:31,468 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:43:31,468 INFO L513 BasicCegarLoop]: trace histogram [3, 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] [2021-11-09 10:43:31,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-09 10:43:31,468 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:43:31,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:31,469 INFO L85 PathProgramCache]: Analyzing trace with hash -131383234, now seen corresponding path program 2 times [2021-11-09 10:43:31,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:31,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674783814] [2021-11-09 10:43:31,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:31,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:31,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:31,544 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:43:31,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:31,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674783814] [2021-11-09 10:43:31,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674783814] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:43:31,545 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:43:31,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:43:31,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413061259] [2021-11-09 10:43:31,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:43:31,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:31,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:43:31,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:43:31,547 INFO L87 Difference]: Start difference. First operand 1127 states and 2020 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:31,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:43:31,637 INFO L93 Difference]: Finished difference Result 2169 states and 3880 transitions. [2021-11-09 10:43:31,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:43:31,638 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-09 10:43:31,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:43:31,648 INFO L225 Difference]: With dead ends: 2169 [2021-11-09 10:43:31,649 INFO L226 Difference]: Without dead ends: 1285 [2021-11-09 10:43:31,651 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:43:31,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1285 states. [2021-11-09 10:43:31,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1285 to 1127. [2021-11-09 10:43:31,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1127 states, 1125 states have (on average 1.7937777777777777) internal successors, (2018), 1126 states have internal predecessors, (2018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:31,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1127 states to 1127 states and 2018 transitions. [2021-11-09 10:43:31,744 INFO L78 Accepts]: Start accepts. Automaton has 1127 states and 2018 transitions. Word has length 69 [2021-11-09 10:43:31,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:43:31,745 INFO L470 AbstractCegarLoop]: Abstraction has 1127 states and 2018 transitions. [2021-11-09 10:43:31,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:31,745 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states and 2018 transitions. [2021-11-09 10:43:31,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-09 10:43:31,748 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:43:31,748 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:43:31,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-09 10:43:31,749 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:43:31,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:31,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1121988477, now seen corresponding path program 1 times [2021-11-09 10:43:31,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:31,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660301427] [2021-11-09 10:43:31,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:31,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:31,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:31,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:43:31,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:31,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660301427] [2021-11-09 10:43:31,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660301427] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:43:31,816 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:43:31,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:43:31,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549536352] [2021-11-09 10:43:31,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:43:31,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:31,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:43:31,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:43:31,817 INFO L87 Difference]: Start difference. First operand 1127 states and 2018 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:31,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:43:31,932 INFO L93 Difference]: Finished difference Result 3023 states and 5440 transitions. [2021-11-09 10:43:31,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:43:31,933 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-09 10:43:31,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:43:31,946 INFO L225 Difference]: With dead ends: 3023 [2021-11-09 10:43:31,946 INFO L226 Difference]: Without dead ends: 1993 [2021-11-09 10:43:31,948 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:43:31,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1993 states. [2021-11-09 10:43:32,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1993 to 1835. [2021-11-09 10:43:32,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1835 states, 1833 states have (on average 1.8052373158756136) internal successors, (3309), 1834 states have internal predecessors, (3309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:32,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1835 states to 1835 states and 3309 transitions. [2021-11-09 10:43:32,087 INFO L78 Accepts]: Start accepts. Automaton has 1835 states and 3309 transitions. Word has length 69 [2021-11-09 10:43:32,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:43:32,088 INFO L470 AbstractCegarLoop]: Abstraction has 1835 states and 3309 transitions. [2021-11-09 10:43:32,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:32,088 INFO L276 IsEmpty]: Start isEmpty. Operand 1835 states and 3309 transitions. [2021-11-09 10:43:32,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-09 10:43:32,092 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:43:32,092 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:43:32,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-09 10:43:32,092 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:43:32,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:32,093 INFO L85 PathProgramCache]: Analyzing trace with hash 910355568, now seen corresponding path program 1 times [2021-11-09 10:43:32,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:32,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746123219] [2021-11-09 10:43:32,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:32,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:32,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:32,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:43:32,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:32,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746123219] [2021-11-09 10:43:32,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746123219] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:43:32,155 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:43:32,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:43:32,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325586033] [2021-11-09 10:43:32,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:43:32,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:32,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:43:32,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:43:32,157 INFO L87 Difference]: Start difference. First operand 1835 states and 3309 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:32,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:43:32,335 INFO L93 Difference]: Finished difference Result 4883 states and 8832 transitions. [2021-11-09 10:43:32,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:43:32,337 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-09 10:43:32,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:43:32,360 INFO L225 Difference]: With dead ends: 4883 [2021-11-09 10:43:32,360 INFO L226 Difference]: Without dead ends: 3179 [2021-11-09 10:43:32,364 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:43:32,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3179 states. [2021-11-09 10:43:32,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3179 to 3021. [2021-11-09 10:43:32,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3021 states, 3019 states have (on average 1.8105332891685988) internal successors, (5466), 3020 states have internal predecessors, (5466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:32,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3021 states to 3021 states and 5466 transitions. [2021-11-09 10:43:32,586 INFO L78 Accepts]: Start accepts. Automaton has 3021 states and 5466 transitions. Word has length 70 [2021-11-09 10:43:32,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:43:32,587 INFO L470 AbstractCegarLoop]: Abstraction has 3021 states and 5466 transitions. [2021-11-09 10:43:32,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:32,587 INFO L276 IsEmpty]: Start isEmpty. Operand 3021 states and 5466 transitions. [2021-11-09 10:43:32,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-09 10:43:32,593 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:43:32,593 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:43:32,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-09 10:43:32,593 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:43:32,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:32,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1352445838, now seen corresponding path program 1 times [2021-11-09 10:43:32,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:32,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595883156] [2021-11-09 10:43:32,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:32,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:32,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:32,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:43:32,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:32,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595883156] [2021-11-09 10:43:32,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595883156] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:43:32,664 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:43:32,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:43:32,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739879352] [2021-11-09 10:43:32,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:43:32,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:32,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:43:32,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:43:32,666 INFO L87 Difference]: Start difference. First operand 3021 states and 5466 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:32,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:43:32,955 INFO L93 Difference]: Finished difference Result 8157 states and 14786 transitions. [2021-11-09 10:43:32,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:43:32,955 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-09 10:43:32,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:43:32,988 INFO L225 Difference]: With dead ends: 8157 [2021-11-09 10:43:32,989 INFO L226 Difference]: Without dead ends: 5301 [2021-11-09 10:43:32,994 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:43:33,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5301 states. [2021-11-09 10:43:33,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5301 to 5143. [2021-11-09 10:43:33,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5143 states, 5141 states have (on average 1.8119042987745575) internal successors, (9315), 5142 states have internal predecessors, (9315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:33,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5143 states to 5143 states and 9315 transitions. [2021-11-09 10:43:33,320 INFO L78 Accepts]: Start accepts. Automaton has 5143 states and 9315 transitions. Word has length 71 [2021-11-09 10:43:33,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:43:33,321 INFO L470 AbstractCegarLoop]: Abstraction has 5143 states and 9315 transitions. [2021-11-09 10:43:33,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:33,321 INFO L276 IsEmpty]: Start isEmpty. Operand 5143 states and 9315 transitions. [2021-11-09 10:43:33,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-09 10:43:33,330 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:43:33,330 INFO L513 BasicCegarLoop]: trace histogram [3, 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] [2021-11-09 10:43:33,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-09 10:43:33,330 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:43:33,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:33,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1058303086, now seen corresponding path program 1 times [2021-11-09 10:43:33,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:33,331 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995008588] [2021-11-09 10:43:33,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:33,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:33,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:33,404 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 10:43:33,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:33,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995008588] [2021-11-09 10:43:33,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995008588] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:43:33,405 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:43:33,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 10:43:33,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136294727] [2021-11-09 10:43:33,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 10:43:33,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:33,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 10:43:33,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:43:33,411 INFO L87 Difference]: Start difference. First operand 5143 states and 9315 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:34,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:43:34,147 INFO L93 Difference]: Finished difference Result 14656 states and 26576 transitions. [2021-11-09 10:43:34,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 10:43:34,148 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-09 10:43:34,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:43:34,208 INFO L225 Difference]: With dead ends: 14656 [2021-11-09 10:43:34,208 INFO L226 Difference]: Without dead ends: 9756 [2021-11-09 10:43:34,217 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-09 10:43:34,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9756 states. [2021-11-09 10:43:34,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9756 to 5143. [2021-11-09 10:43:34,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5143 states, 5141 states have (on average 1.8021785644816184) internal successors, (9265), 5142 states have internal predecessors, (9265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:34,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5143 states to 5143 states and 9265 transitions. [2021-11-09 10:43:34,692 INFO L78 Accepts]: Start accepts. Automaton has 5143 states and 9265 transitions. Word has length 72 [2021-11-09 10:43:34,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:43:34,692 INFO L470 AbstractCegarLoop]: Abstraction has 5143 states and 9265 transitions. [2021-11-09 10:43:34,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:34,693 INFO L276 IsEmpty]: Start isEmpty. Operand 5143 states and 9265 transitions. [2021-11-09 10:43:34,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-09 10:43:34,700 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:43:34,700 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:43:34,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-09 10:43:34,701 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:43:34,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:34,701 INFO L85 PathProgramCache]: Analyzing trace with hash -659289439, now seen corresponding path program 1 times [2021-11-09 10:43:34,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:34,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494497466] [2021-11-09 10:43:34,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:34,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:34,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:34,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:43:34,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:34,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494497466] [2021-11-09 10:43:34,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494497466] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:43:34,768 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:43:34,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:43:34,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202250573] [2021-11-09 10:43:34,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:43:34,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:34,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:43:34,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:43:34,770 INFO L87 Difference]: Start difference. First operand 5143 states and 9265 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:35,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:43:35,285 INFO L93 Difference]: Finished difference Result 14981 states and 27028 transitions. [2021-11-09 10:43:35,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:43:35,286 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-09 10:43:35,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:43:35,314 INFO L225 Difference]: With dead ends: 14981 [2021-11-09 10:43:35,314 INFO L226 Difference]: Without dead ends: 10007 [2021-11-09 10:43:35,324 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:43:35,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10007 states. [2021-11-09 10:43:35,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10007 to 9849. [2021-11-09 10:43:35,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9849 states, 9847 states have (on average 1.8021732507362649) internal successors, (17746), 9848 states have internal predecessors, (17746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:35,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9849 states to 9849 states and 17746 transitions. [2021-11-09 10:43:35,954 INFO L78 Accepts]: Start accepts. Automaton has 9849 states and 17746 transitions. Word has length 72 [2021-11-09 10:43:35,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:43:35,954 INFO L470 AbstractCegarLoop]: Abstraction has 9849 states and 17746 transitions. [2021-11-09 10:43:35,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:35,955 INFO L276 IsEmpty]: Start isEmpty. Operand 9849 states and 17746 transitions. [2021-11-09 10:43:35,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-09 10:43:35,963 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:43:35,963 INFO L513 BasicCegarLoop]: trace histogram [3, 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] [2021-11-09 10:43:35,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-09 10:43:35,964 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:43:35,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:35,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1445262707, now seen corresponding path program 1 times [2021-11-09 10:43:35,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:35,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272461865] [2021-11-09 10:43:35,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:35,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:35,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:36,048 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-09 10:43:36,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:36,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272461865] [2021-11-09 10:43:36,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272461865] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:43:36,049 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:43:36,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-09 10:43:36,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061064988] [2021-11-09 10:43:36,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 10:43:36,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:36,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 10:43:36,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-09 10:43:36,051 INFO L87 Difference]: Start difference. First operand 9849 states and 17746 transitions. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:37,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:43:37,395 INFO L93 Difference]: Finished difference Result 19970 states and 35949 transitions. [2021-11-09 10:43:37,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 10:43:37,396 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-09 10:43:37,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:43:37,457 INFO L225 Difference]: With dead ends: 19970 [2021-11-09 10:43:37,458 INFO L226 Difference]: Without dead ends: 19830 [2021-11-09 10:43:37,466 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-09 10:43:37,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19830 states. [2021-11-09 10:43:38,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19830 to 19617. [2021-11-09 10:43:38,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19617 states, 19615 states have (on average 1.8026000509813918) internal successors, (35358), 19616 states have internal predecessors, (35358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:38,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19617 states to 19617 states and 35358 transitions. [2021-11-09 10:43:38,723 INFO L78 Accepts]: Start accepts. Automaton has 19617 states and 35358 transitions. Word has length 73 [2021-11-09 10:43:38,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:43:38,724 INFO L470 AbstractCegarLoop]: Abstraction has 19617 states and 35358 transitions. [2021-11-09 10:43:38,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:38,724 INFO L276 IsEmpty]: Start isEmpty. Operand 19617 states and 35358 transitions. [2021-11-09 10:43:38,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-09 10:43:38,744 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:43:38,745 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:43:38,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-09 10:43:38,745 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:43:38,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:38,746 INFO L85 PathProgramCache]: Analyzing trace with hash 37432457, now seen corresponding path program 1 times [2021-11-09 10:43:38,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:38,746 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526533990] [2021-11-09 10:43:38,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:38,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:38,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:38,838 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-09 10:43:38,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:38,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526533990] [2021-11-09 10:43:38,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526533990] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:43:38,839 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:43:38,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 10:43:38,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933913639] [2021-11-09 10:43:38,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 10:43:38,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:38,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 10:43:38,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:43:38,843 INFO L87 Difference]: Start difference. First operand 19617 states and 35358 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:40,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:43:40,013 INFO L93 Difference]: Finished difference Result 19907 states and 35844 transitions. [2021-11-09 10:43:40,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 10:43:40,014 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-09 10:43:40,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:43:40,068 INFO L225 Difference]: With dead ends: 19907 [2021-11-09 10:43:40,068 INFO L226 Difference]: Without dead ends: 19680 [2021-11-09 10:43:40,075 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-09 10:43:40,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19680 states. [2021-11-09 10:43:41,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19680 to 19611. [2021-11-09 10:43:41,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19611 states, 19609 states have (on average 1.802488653169463) internal successors, (35345), 19610 states have internal predecessors, (35345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:41,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19611 states to 19611 states and 35345 transitions. [2021-11-09 10:43:41,371 INFO L78 Accepts]: Start accepts. Automaton has 19611 states and 35345 transitions. Word has length 74 [2021-11-09 10:43:41,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:43:41,371 INFO L470 AbstractCegarLoop]: Abstraction has 19611 states and 35345 transitions. [2021-11-09 10:43:41,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:41,372 INFO L276 IsEmpty]: Start isEmpty. Operand 19611 states and 35345 transitions. [2021-11-09 10:43:41,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-09 10:43:41,389 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:43:41,389 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:43:41,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-09 10:43:41,390 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:43:41,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:41,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1100101888, now seen corresponding path program 1 times [2021-11-09 10:43:41,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:41,391 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389652158] [2021-11-09 10:43:41,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:41,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:41,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:41,445 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-09 10:43:41,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:41,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389652158] [2021-11-09 10:43:41,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389652158] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:43:41,446 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:43:41,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:43:41,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249697757] [2021-11-09 10:43:41,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:43:41,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:41,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:43:41,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:43:41,448 INFO L87 Difference]: Start difference. First operand 19611 states and 35345 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:42,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:43:42,506 INFO L93 Difference]: Finished difference Result 38230 states and 69018 transitions. [2021-11-09 10:43:42,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:43:42,507 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-09 10:43:42,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:43:42,591 INFO L225 Difference]: With dead ends: 38230 [2021-11-09 10:43:42,591 INFO L226 Difference]: Without dead ends: 28393 [2021-11-09 10:43:42,608 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:43:42,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28393 states. [2021-11-09 10:43:43,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28393 to 19373. [2021-11-09 10:43:43,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19373 states, 19371 states have (on average 1.8034174797377522) internal successors, (34934), 19372 states have internal predecessors, (34934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:43,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19373 states to 19373 states and 34934 transitions. [2021-11-09 10:43:43,684 INFO L78 Accepts]: Start accepts. Automaton has 19373 states and 34934 transitions. Word has length 74 [2021-11-09 10:43:43,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:43:43,685 INFO L470 AbstractCegarLoop]: Abstraction has 19373 states and 34934 transitions. [2021-11-09 10:43:43,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:43,685 INFO L276 IsEmpty]: Start isEmpty. Operand 19373 states and 34934 transitions. [2021-11-09 10:43:43,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-09 10:43:43,698 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:43:43,699 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:43:43,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-09 10:43:43,699 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:43:43,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:43,700 INFO L85 PathProgramCache]: Analyzing trace with hash 635737047, now seen corresponding path program 1 times [2021-11-09 10:43:43,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:43,700 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313888328] [2021-11-09 10:43:43,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:43,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:43,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:43,792 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 10:43:43,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:43,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313888328] [2021-11-09 10:43:43,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313888328] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:43,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646142799] [2021-11-09 10:43:43,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:43,793 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:43:43,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd96e46-972d-48ba-85fa-22fdf0968d32/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:43,794 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd96e46-972d-48ba-85fa-22fdf0968d32/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:43:43,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd96e46-972d-48ba-85fa-22fdf0968d32/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 10:43:44,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:44,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 965 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 10:43:44,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:43:44,353 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:43:44,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646142799] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:44,354 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:43:44,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-09 10:43:44,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106428377] [2021-11-09 10:43:44,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 10:43:44,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:44,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 10:43:44,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-09 10:43:44,357 INFO L87 Difference]: Start difference. First operand 19373 states and 34934 transitions. Second operand has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:45,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:43:45,591 INFO L93 Difference]: Finished difference Result 22032 states and 39529 transitions. [2021-11-09 10:43:45,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-09 10:43:45,593 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-09 10:43:45,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:43:45,636 INFO L225 Difference]: With dead ends: 22032 [2021-11-09 10:43:45,637 INFO L226 Difference]: Without dead ends: 21791 [2021-11-09 10:43:45,643 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-11-09 10:43:45,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21791 states. [2021-11-09 10:43:46,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21791 to 20964. [2021-11-09 10:43:46,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20964 states, 20962 states have (on average 1.8010686003243965) internal successors, (37754), 20963 states have internal predecessors, (37754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:46,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20964 states to 20964 states and 37754 transitions. [2021-11-09 10:43:46,564 INFO L78 Accepts]: Start accepts. Automaton has 20964 states and 37754 transitions. Word has length 76 [2021-11-09 10:43:46,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:43:46,565 INFO L470 AbstractCegarLoop]: Abstraction has 20964 states and 37754 transitions. [2021-11-09 10:43:46,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:46,566 INFO L276 IsEmpty]: Start isEmpty. Operand 20964 states and 37754 transitions. [2021-11-09 10:43:46,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-09 10:43:46,583 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:43:46,583 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:43:46,617 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd96e46-972d-48ba-85fa-22fdf0968d32/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-09 10:43:46,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcd96e46-972d-48ba-85fa-22fdf0968d32/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:43:46,798 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:43:46,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:46,799 INFO L85 PathProgramCache]: Analyzing trace with hash -612376295, now seen corresponding path program 1 times [2021-11-09 10:43:46,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:46,799 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801987149] [2021-11-09 10:43:46,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:46,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:46,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:47,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:43:47,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:47,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801987149] [2021-11-09 10:43:47,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801987149] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:43:47,018 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:43:47,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:43:47,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410653259] [2021-11-09 10:43:47,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:43:47,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:47,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:43:47,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:43:47,022 INFO L87 Difference]: Start difference. First operand 20964 states and 37754 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:48,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:43:48,575 INFO L93 Difference]: Finished difference Result 59741 states and 107841 transitions. [2021-11-09 10:43:48,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:43:48,576 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-09 10:43:48,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:43:48,637 INFO L225 Difference]: With dead ends: 59741 [2021-11-09 10:43:48,637 INFO L226 Difference]: Without dead ends: 39665 [2021-11-09 10:43:48,664 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:43:48,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39665 states. [2021-11-09 10:43:50,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39665 to 39424. [2021-11-09 10:43:50,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39424 states, 39422 states have (on average 1.8032570645832275) internal successors, (71088), 39423 states have internal predecessors, (71088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:50,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39424 states to 39424 states and 71088 transitions. [2021-11-09 10:43:50,566 INFO L78 Accepts]: Start accepts. Automaton has 39424 states and 71088 transitions. Word has length 79 [2021-11-09 10:43:50,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:43:50,567 INFO L470 AbstractCegarLoop]: Abstraction has 39424 states and 71088 transitions. [2021-11-09 10:43:50,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:50,567 INFO L276 IsEmpty]: Start isEmpty. Operand 39424 states and 71088 transitions. [2021-11-09 10:43:50,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-09 10:43:50,581 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:43:50,582 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:43:50,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-09 10:43:50,582 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:43:50,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:50,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1832312383, now seen corresponding path program 1 times [2021-11-09 10:43:50,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:50,583 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775142708] [2021-11-09 10:43:50,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:50,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:50,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:50,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:43:50,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:50,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775142708] [2021-11-09 10:43:50,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775142708] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:43:50,642 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:43:50,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:43:50,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362243748] [2021-11-09 10:43:50,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:43:50,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:50,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:43:50,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:43:50,643 INFO L87 Difference]: Start difference. First operand 39424 states and 71088 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:53,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:43:53,382 INFO L93 Difference]: Finished difference Result 115132 states and 207718 transitions. [2021-11-09 10:43:53,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:43:53,385 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-09 10:43:53,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:43:53,507 INFO L225 Difference]: With dead ends: 115132 [2021-11-09 10:43:53,507 INFO L226 Difference]: Without dead ends: 76755 [2021-11-09 10:43:53,537 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:43:53,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76755 states. [2021-11-09 10:43:56,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76755 to 76514. [2021-11-09 10:43:56,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76514 states, 76512 states have (on average 1.800658720200753) internal successors, (137772), 76513 states have internal predecessors, (137772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:56,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76514 states to 76514 states and 137772 transitions. [2021-11-09 10:43:56,716 INFO L78 Accepts]: Start accepts. Automaton has 76514 states and 137772 transitions. Word has length 80 [2021-11-09 10:43:56,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:43:56,717 INFO L470 AbstractCegarLoop]: Abstraction has 76514 states and 137772 transitions. [2021-11-09 10:43:56,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:56,717 INFO L276 IsEmpty]: Start isEmpty. Operand 76514 states and 137772 transitions. [2021-11-09 10:43:56,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-09 10:43:56,739 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:43:56,739 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:43:56,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-09 10:43:56,739 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:43:56,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:56,740 INFO L85 PathProgramCache]: Analyzing trace with hash 2058545739, now seen corresponding path program 1 times [2021-11-09 10:43:56,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:56,740 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094949826] [2021-11-09 10:43:56,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:56,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:56,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:56,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:43:56,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:56,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094949826] [2021-11-09 10:43:56,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094949826] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:43:56,795 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:43:56,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:43:56,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514406237] [2021-11-09 10:43:56,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:43:56,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:56,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:43:56,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:43:56,797 INFO L87 Difference]: Start difference. First operand 76514 states and 137772 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:02,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:02,004 INFO L93 Difference]: Finished difference Result 210093 states and 377885 transitions. [2021-11-09 10:44:02,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:44:02,004 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-09 10:44:02,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:02,279 INFO L225 Difference]: With dead ends: 210093 [2021-11-09 10:44:02,279 INFO L226 Difference]: Without dead ends: 135065 [2021-11-09 10:44:02,331 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:44:02,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135065 states. [2021-11-09 10:44:07,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135065 to 134824. [2021-11-09 10:44:08,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134824 states, 134822 states have (on average 1.7933052469181587) internal successors, (241777), 134823 states have internal predecessors, (241777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:08,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134824 states to 134824 states and 241777 transitions. [2021-11-09 10:44:08,403 INFO L78 Accepts]: Start accepts. Automaton has 134824 states and 241777 transitions. Word has length 81 [2021-11-09 10:44:08,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:08,404 INFO L470 AbstractCegarLoop]: Abstraction has 134824 states and 241777 transitions. [2021-11-09 10:44:08,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:08,404 INFO L276 IsEmpty]: Start isEmpty. Operand 134824 states and 241777 transitions. [2021-11-09 10:44:08,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-09 10:44:08,423 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:08,423 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:08,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-09 10:44:08,424 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:08,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:08,424 INFO L85 PathProgramCache]: Analyzing trace with hash 817288097, now seen corresponding path program 1 times [2021-11-09 10:44:08,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:08,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916070869] [2021-11-09 10:44:08,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:08,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:08,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:08,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:08,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:08,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916070869] [2021-11-09 10:44:08,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916070869] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:44:08,490 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:44:08,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:44:08,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554349507] [2021-11-09 10:44:08,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:44:08,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:08,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:44:08,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:44:08,492 INFO L87 Difference]: Start difference. First operand 134824 states and 241777 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)