./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem17_label21.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem17_label21.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 094be3bd22098479b0cd50c57f93c246c7d8c744192a211aacece1f30e4af2db --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 12:45:39,825 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 12:45:39,826 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 12:45:39,854 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 12:45:39,855 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 12:45:39,856 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 12:45:39,857 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 12:45:39,859 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 12:45:39,861 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 12:45:39,862 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 12:45:39,863 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 12:45:39,864 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 12:45:39,864 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 12:45:39,865 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 12:45:39,867 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 12:45:39,868 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 12:45:39,869 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 12:45:39,870 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 12:45:39,872 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 12:45:39,874 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 12:45:39,875 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 12:45:39,876 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 12:45:39,877 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 12:45:39,878 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 12:45:39,881 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 12:45:39,881 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 12:45:39,881 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 12:45:39,882 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 12:45:39,883 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 12:45:39,884 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 12:45:39,890 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 12:45:39,891 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 12:45:39,892 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 12:45:39,893 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 12:45:39,893 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 12:45:39,894 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 12:45:39,894 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 12:45:39,895 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 12:45:39,895 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 12:45:39,896 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 12:45:39,897 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 12:45:39,904 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 12:45:39,934 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 12:45:39,934 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 12:45:39,935 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 12:45:39,943 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 12:45:39,944 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 12:45:39,944 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 12:45:39,945 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 12:45:39,945 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 12:45:39,946 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 12:45:39,946 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 12:45:39,947 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 12:45:39,947 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 12:45:39,947 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 12:45:39,947 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 12:45:39,948 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 12:45:39,948 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 12:45:39,948 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 12:45:39,948 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 12:45:39,948 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 12:45:39,948 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 12:45:39,949 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 12:45:39,949 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 12:45:39,949 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 12:45:39,949 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 12:45:39,950 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 12:45:39,950 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 12:45:39,950 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 12:45:39,952 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 12:45:39,952 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 12:45:39,952 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 12:45:39,952 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 12:45:39,952 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 12:45:39,953 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 12:45:39,953 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 12:45:39,953 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 094be3bd22098479b0cd50c57f93c246c7d8c744192a211aacece1f30e4af2db [2021-12-14 12:45:40,139 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 12:45:40,157 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 12:45:40,159 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 12:45:40,160 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 12:45:40,161 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 12:45:40,162 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem17_label21.c [2021-12-14 12:45:40,249 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/271f7a5c3/01e9c46af15043239783532cec4ea4be/FLAG1a72afc56 [2021-12-14 12:45:40,859 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 12:45:40,860 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label21.c [2021-12-14 12:45:40,883 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/271f7a5c3/01e9c46af15043239783532cec4ea4be/FLAG1a72afc56 [2021-12-14 12:45:41,247 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/271f7a5c3/01e9c46af15043239783532cec4ea4be [2021-12-14 12:45:41,249 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 12:45:41,251 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 12:45:41,255 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 12:45:41,255 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 12:45:41,258 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 12:45:41,259 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:45:41" (1/1) ... [2021-12-14 12:45:41,260 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62a40548 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:45:41, skipping insertion in model container [2021-12-14 12:45:41,260 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:45:41" (1/1) ... [2021-12-14 12:45:41,266 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 12:45:41,347 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 12:45:41,558 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label21.c[8748,8761] [2021-12-14 12:45:42,058 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 12:45:42,065 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 12:45:42,096 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label21.c[8748,8761] [2021-12-14 12:45:42,338 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 12:45:42,353 INFO L208 MainTranslator]: Completed translation [2021-12-14 12:45:42,354 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:45:42 WrapperNode [2021-12-14 12:45:42,354 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 12:45:42,355 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 12:45:42,355 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 12:45:42,355 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 12:45:42,361 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:45:42" (1/1) ... [2021-12-14 12:45:42,399 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:45:42" (1/1) ... [2021-12-14 12:45:42,618 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2611 [2021-12-14 12:45:42,619 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 12:45:42,620 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 12:45:42,620 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 12:45:42,620 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 12:45:42,627 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:45:42" (1/1) ... [2021-12-14 12:45:42,627 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:45:42" (1/1) ... [2021-12-14 12:45:42,729 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:45:42" (1/1) ... [2021-12-14 12:45:42,729 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:45:42" (1/1) ... [2021-12-14 12:45:42,900 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:45:42" (1/1) ... [2021-12-14 12:45:42,922 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:45:42" (1/1) ... [2021-12-14 12:45:42,949 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:45:42" (1/1) ... [2021-12-14 12:45:42,988 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 12:45:42,989 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 12:45:42,990 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 12:45:42,990 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 12:45:42,991 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:45:42" (1/1) ... [2021-12-14 12:45:42,997 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 12:45:43,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 12:45:43,024 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-14 12:45:43,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-14 12:45:43,067 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 12:45:43,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 12:45:43,068 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 12:45:43,068 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 12:45:43,126 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 12:45:43,128 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 12:45:46,151 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 12:45:46,163 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 12:45:46,163 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-14 12:45:46,167 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:45:46 BoogieIcfgContainer [2021-12-14 12:45:46,167 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 12:45:46,169 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 12:45:46,169 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 12:45:46,172 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 12:45:46,172 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 12:45:41" (1/3) ... [2021-12-14 12:45:46,173 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7802f879 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:45:46, skipping insertion in model container [2021-12-14 12:45:46,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:45:42" (2/3) ... [2021-12-14 12:45:46,174 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7802f879 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:45:46, skipping insertion in model container [2021-12-14 12:45:46,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:45:46" (3/3) ... [2021-12-14 12:45:46,175 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label21.c [2021-12-14 12:45:46,179 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 12:45:46,179 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 12:45:46,224 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 12:45:46,229 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=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 [2021-12-14 12:45:46,230 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 12:45:46,251 INFO L276 IsEmpty]: Start isEmpty. Operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 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) [2021-12-14 12:45:46,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-14 12:45:46,258 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:45:46,259 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:45:46,259 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:45:46,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:45:46,264 INFO L85 PathProgramCache]: Analyzing trace with hash 118092897, now seen corresponding path program 1 times [2021-12-14 12:45:46,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:45:46,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300221651] [2021-12-14 12:45:46,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:45:46,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:45:46,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:45:46,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 12:45:46,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:45:46,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300221651] [2021-12-14 12:45:46,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300221651] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:45:46,518 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:45:46,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 12:45:46,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072175843] [2021-12-14 12:45:46,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:45:46,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:45:46,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:45:46,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:45:46,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:45:46,556 INFO L87 Difference]: Start difference. First operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 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 19.666666666666668) internal successors, (59), 2 states have internal predecessors, (59), 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) [2021-12-14 12:45:49,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:45:49,206 INFO L93 Difference]: Finished difference Result 1644 states and 3029 transitions. [2021-12-14 12:45:49,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:45:49,209 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 2 states have internal predecessors, (59), 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 59 [2021-12-14 12:45:49,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:45:49,234 INFO L225 Difference]: With dead ends: 1644 [2021-12-14 12:45:49,235 INFO L226 Difference]: Without dead ends: 977 [2021-12-14 12:45:49,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:45:49,248 INFO L933 BasicCegarLoop]: 425 mSDtfsCounter, 429 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 1470 mSolverCounterSat, 332 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 1802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 332 IncrementalHoareTripleChecker+Valid, 1470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-14 12:45:49,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [429 Valid, 503 Invalid, 1802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 1470 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-14 12:45:49,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2021-12-14 12:45:49,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 971. [2021-12-14 12:45:49,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 971 states, 970 states have (on average 1.5536082474226804) internal successors, (1507), 970 states have internal predecessors, (1507), 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) [2021-12-14 12:45:49,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 1507 transitions. [2021-12-14 12:45:49,344 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 1507 transitions. Word has length 59 [2021-12-14 12:45:49,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:45:49,345 INFO L470 AbstractCegarLoop]: Abstraction has 971 states and 1507 transitions. [2021-12-14 12:45:49,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 2 states have internal predecessors, (59), 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) [2021-12-14 12:45:49,346 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 1507 transitions. [2021-12-14 12:45:49,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-12-14 12:45:49,350 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:45:49,350 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:45:49,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 12:45:49,351 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:45:49,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:45:49,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1204082166, now seen corresponding path program 1 times [2021-12-14 12:45:49,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:45:49,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105680715] [2021-12-14 12:45:49,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:45:49,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:45:49,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:45:49,482 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 12:45:49,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:45:49,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105680715] [2021-12-14 12:45:49,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105680715] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:45:49,483 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:45:49,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 12:45:49,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887298818] [2021-12-14 12:45:49,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:45:49,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:45:49,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:45:49,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:45:49,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:45:49,486 INFO L87 Difference]: Start difference. First operand 971 states and 1507 transitions. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 2 states have internal predecessors, (126), 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) [2021-12-14 12:45:51,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:45:51,683 INFO L93 Difference]: Finished difference Result 2813 states and 4381 transitions. [2021-12-14 12:45:51,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:45:51,684 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 2 states have internal predecessors, (126), 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 126 [2021-12-14 12:45:51,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:45:51,690 INFO L225 Difference]: With dead ends: 2813 [2021-12-14 12:45:51,691 INFO L226 Difference]: Without dead ends: 1844 [2021-12-14 12:45:51,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:45:51,698 INFO L933 BasicCegarLoop]: 506 mSDtfsCounter, 405 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1381 mSolverCounterSat, 325 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 1706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 1381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-14 12:45:51,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [405 Valid, 579 Invalid, 1706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 1381 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-14 12:45:51,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2021-12-14 12:45:51,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 1841. [2021-12-14 12:45:51,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1841 states, 1840 states have (on average 1.35) internal successors, (2484), 1840 states have internal predecessors, (2484), 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) [2021-12-14 12:45:51,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 2484 transitions. [2021-12-14 12:45:51,738 INFO L78 Accepts]: Start accepts. Automaton has 1841 states and 2484 transitions. Word has length 126 [2021-12-14 12:45:51,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:45:51,741 INFO L470 AbstractCegarLoop]: Abstraction has 1841 states and 2484 transitions. [2021-12-14 12:45:51,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 2 states have internal predecessors, (126), 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) [2021-12-14 12:45:51,742 INFO L276 IsEmpty]: Start isEmpty. Operand 1841 states and 2484 transitions. [2021-12-14 12:45:51,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-14 12:45:51,753 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:45:51,754 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:45:51,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 12:45:51,755 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:45:51,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:45:51,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1960864468, now seen corresponding path program 1 times [2021-12-14 12:45:51,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:45:51,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102242670] [2021-12-14 12:45:51,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:45:51,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:45:51,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:45:51,884 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 12:45:51,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:45:51,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102242670] [2021-12-14 12:45:51,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102242670] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:45:51,885 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:45:51,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 12:45:51,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118667281] [2021-12-14 12:45:51,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:45:51,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:45:51,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:45:51,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:45:51,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:45:51,887 INFO L87 Difference]: Start difference. First operand 1841 states and 2484 transitions. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 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) [2021-12-14 12:45:53,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:45:53,927 INFO L93 Difference]: Finished difference Result 4552 states and 6282 transitions. [2021-12-14 12:45:53,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:45:53,928 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 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 129 [2021-12-14 12:45:53,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:45:53,938 INFO L225 Difference]: With dead ends: 4552 [2021-12-14 12:45:53,938 INFO L226 Difference]: Without dead ends: 2713 [2021-12-14 12:45:53,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:45:53,942 INFO L933 BasicCegarLoop]: 818 mSDtfsCounter, 448 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1264 mSolverCounterSat, 415 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 886 SdHoareTripleChecker+Invalid, 1679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 415 IncrementalHoareTripleChecker+Valid, 1264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-14 12:45:53,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [448 Valid, 886 Invalid, 1679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [415 Valid, 1264 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-14 12:45:53,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2713 states. [2021-12-14 12:45:53,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2713 to 2711. [2021-12-14 12:45:53,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2711 states, 2710 states have (on average 1.3003690036900368) internal successors, (3524), 2710 states have internal predecessors, (3524), 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) [2021-12-14 12:45:53,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2711 states to 2711 states and 3524 transitions. [2021-12-14 12:45:53,984 INFO L78 Accepts]: Start accepts. Automaton has 2711 states and 3524 transitions. Word has length 129 [2021-12-14 12:45:53,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:45:53,985 INFO L470 AbstractCegarLoop]: Abstraction has 2711 states and 3524 transitions. [2021-12-14 12:45:53,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 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) [2021-12-14 12:45:53,985 INFO L276 IsEmpty]: Start isEmpty. Operand 2711 states and 3524 transitions. [2021-12-14 12:45:53,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-12-14 12:45:53,988 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:45:53,988 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:45:53,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 12:45:53,988 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:45:53,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:45:53,989 INFO L85 PathProgramCache]: Analyzing trace with hash -52331556, now seen corresponding path program 1 times [2021-12-14 12:45:53,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:45:53,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404533807] [2021-12-14 12:45:53,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:45:53,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:45:54,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:45:54,083 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-14 12:45:54,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:45:54,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404533807] [2021-12-14 12:45:54,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404533807] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:45:54,084 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:45:54,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 12:45:54,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052792192] [2021-12-14 12:45:54,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:45:54,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:45:54,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:45:54,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:45:54,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:45:54,086 INFO L87 Difference]: Start difference. First operand 2711 states and 3524 transitions. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 2 states have internal predecessors, (131), 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) [2021-12-14 12:45:55,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:45:55,874 INFO L93 Difference]: Finished difference Result 7984 states and 10361 transitions. [2021-12-14 12:45:55,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:45:55,875 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 2 states have internal predecessors, (131), 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 198 [2021-12-14 12:45:55,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:45:55,889 INFO L225 Difference]: With dead ends: 7984 [2021-12-14 12:45:55,889 INFO L226 Difference]: Without dead ends: 4421 [2021-12-14 12:45:55,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:45:55,894 INFO L933 BasicCegarLoop]: 516 mSDtfsCounter, 386 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-14 12:45:55,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 591 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-14 12:45:55,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4421 states. [2021-12-14 12:45:55,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4421 to 3571. [2021-12-14 12:45:55,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3571 states, 3570 states have (on average 1.1775910364145659) internal successors, (4204), 3570 states have internal predecessors, (4204), 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) [2021-12-14 12:45:55,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3571 states to 3571 states and 4204 transitions. [2021-12-14 12:45:55,953 INFO L78 Accepts]: Start accepts. Automaton has 3571 states and 4204 transitions. Word has length 198 [2021-12-14 12:45:55,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:45:55,954 INFO L470 AbstractCegarLoop]: Abstraction has 3571 states and 4204 transitions. [2021-12-14 12:45:55,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 2 states have internal predecessors, (131), 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) [2021-12-14 12:45:55,954 INFO L276 IsEmpty]: Start isEmpty. Operand 3571 states and 4204 transitions. [2021-12-14 12:45:55,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2021-12-14 12:45:55,957 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:45:55,957 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:45:55,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 12:45:55,957 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:45:55,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:45:55,958 INFO L85 PathProgramCache]: Analyzing trace with hash -651132738, now seen corresponding path program 1 times [2021-12-14 12:45:55,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:45:55,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644429426] [2021-12-14 12:45:55,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:45:55,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:45:55,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:45:56,054 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 181 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 12:45:56,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:45:56,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644429426] [2021-12-14 12:45:56,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644429426] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:45:56,055 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:45:56,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 12:45:56,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025933347] [2021-12-14 12:45:56,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:45:56,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:45:56,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:45:56,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:45:56,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:45:56,058 INFO L87 Difference]: Start difference. First operand 3571 states and 4204 transitions. Second operand has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 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) [2021-12-14 12:45:57,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:45:57,578 INFO L93 Difference]: Finished difference Result 9273 states and 11087 transitions. [2021-12-14 12:45:57,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:45:57,579 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 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 211 [2021-12-14 12:45:57,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:45:57,594 INFO L225 Difference]: With dead ends: 9273 [2021-12-14 12:45:57,594 INFO L226 Difference]: Without dead ends: 5704 [2021-12-14 12:45:57,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:45:57,600 INFO L933 BasicCegarLoop]: 726 mSDtfsCounter, 496 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1136 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 784 SdHoareTripleChecker+Invalid, 1442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 1136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-14 12:45:57,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [496 Valid, 784 Invalid, 1442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 1136 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-14 12:45:57,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5704 states. [2021-12-14 12:45:57,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5704 to 5704. [2021-12-14 12:45:57,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5704 states, 5703 states have (on average 1.1595651411537786) internal successors, (6613), 5703 states have internal predecessors, (6613), 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) [2021-12-14 12:45:57,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5704 states to 5704 states and 6613 transitions. [2021-12-14 12:45:57,682 INFO L78 Accepts]: Start accepts. Automaton has 5704 states and 6613 transitions. Word has length 211 [2021-12-14 12:45:57,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:45:57,683 INFO L470 AbstractCegarLoop]: Abstraction has 5704 states and 6613 transitions. [2021-12-14 12:45:57,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 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) [2021-12-14 12:45:57,686 INFO L276 IsEmpty]: Start isEmpty. Operand 5704 states and 6613 transitions. [2021-12-14 12:45:57,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2021-12-14 12:45:57,689 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:45:57,690 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:45:57,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 12:45:57,690 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:45:57,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:45:57,691 INFO L85 PathProgramCache]: Analyzing trace with hash 668808547, now seen corresponding path program 1 times [2021-12-14 12:45:57,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:45:57,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464308376] [2021-12-14 12:45:57,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:45:57,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:45:57,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:45:57,788 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-14 12:45:57,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:45:57,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464308376] [2021-12-14 12:45:57,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464308376] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:45:57,789 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:45:57,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 12:45:57,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312349878] [2021-12-14 12:45:57,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:45:57,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:45:57,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:45:57,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:45:57,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:45:57,792 INFO L87 Difference]: Start difference. First operand 5704 states and 6613 transitions. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 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) [2021-12-14 12:45:59,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:45:59,848 INFO L93 Difference]: Finished difference Result 14376 states and 16776 transitions. [2021-12-14 12:45:59,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:45:59,848 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 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 213 [2021-12-14 12:45:59,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:45:59,870 INFO L225 Difference]: With dead ends: 14376 [2021-12-14 12:45:59,871 INFO L226 Difference]: Without dead ends: 8673 [2021-12-14 12:45:59,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:45:59,877 INFO L933 BasicCegarLoop]: 382 mSDtfsCounter, 392 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1215 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 1489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 1215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-14 12:45:59,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [392 Valid, 444 Invalid, 1489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 1215 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-14 12:45:59,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8673 states. [2021-12-14 12:45:59,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8673 to 5677. [2021-12-14 12:45:59,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5677 states, 5676 states have (on average 1.1578576462297392) internal successors, (6572), 5676 states have internal predecessors, (6572), 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) [2021-12-14 12:45:59,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5677 states to 5677 states and 6572 transitions. [2021-12-14 12:45:59,999 INFO L78 Accepts]: Start accepts. Automaton has 5677 states and 6572 transitions. Word has length 213 [2021-12-14 12:45:59,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:45:59,999 INFO L470 AbstractCegarLoop]: Abstraction has 5677 states and 6572 transitions. [2021-12-14 12:46:00,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 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) [2021-12-14 12:46:00,000 INFO L276 IsEmpty]: Start isEmpty. Operand 5677 states and 6572 transitions. [2021-12-14 12:46:00,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2021-12-14 12:46:00,004 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:46:00,004 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:46:00,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 12:46:00,005 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:46:00,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:46:00,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1992117343, now seen corresponding path program 1 times [2021-12-14 12:46:00,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:46:00,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478662835] [2021-12-14 12:46:00,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:46:00,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:46:00,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:46:00,159 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 246 proven. 0 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-12-14 12:46:00,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:46:00,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478662835] [2021-12-14 12:46:00,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478662835] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:46:00,160 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:46:00,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 12:46:00,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606510265] [2021-12-14 12:46:00,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:46:00,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:46:00,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:46:00,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:46:00,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:46:00,162 INFO L87 Difference]: Start difference. First operand 5677 states and 6572 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 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) [2021-12-14 12:46:01,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:46:01,764 INFO L93 Difference]: Finished difference Result 14315 states and 16680 transitions. [2021-12-14 12:46:01,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:46:01,765 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 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 291 [2021-12-14 12:46:01,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:46:01,784 INFO L225 Difference]: With dead ends: 14315 [2021-12-14 12:46:01,785 INFO L226 Difference]: Without dead ends: 7790 [2021-12-14 12:46:01,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:46:01,792 INFO L933 BasicCegarLoop]: 778 mSDtfsCounter, 383 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 1199 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 847 SdHoareTripleChecker+Invalid, 1457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 1199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-14 12:46:01,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [383 Valid, 847 Invalid, 1457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 1199 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-14 12:46:01,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7790 states. [2021-12-14 12:46:01,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7790 to 7790. [2021-12-14 12:46:01,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7790 states, 7789 states have (on average 1.1186288355372962) internal successors, (8713), 7789 states have internal predecessors, (8713), 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) [2021-12-14 12:46:01,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7790 states to 7790 states and 8713 transitions. [2021-12-14 12:46:01,891 INFO L78 Accepts]: Start accepts. Automaton has 7790 states and 8713 transitions. Word has length 291 [2021-12-14 12:46:01,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:46:01,892 INFO L470 AbstractCegarLoop]: Abstraction has 7790 states and 8713 transitions. [2021-12-14 12:46:01,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 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) [2021-12-14 12:46:01,892 INFO L276 IsEmpty]: Start isEmpty. Operand 7790 states and 8713 transitions. [2021-12-14 12:46:01,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2021-12-14 12:46:01,897 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:46:01,897 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-14 12:46:01,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 12:46:01,898 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:46:01,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:46:01,899 INFO L85 PathProgramCache]: Analyzing trace with hash -899235588, now seen corresponding path program 1 times [2021-12-14 12:46:01,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:46:01,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366460770] [2021-12-14 12:46:01,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:46:01,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:46:01,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:46:02,031 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 170 proven. 0 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2021-12-14 12:46:02,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:46:02,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366460770] [2021-12-14 12:46:02,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366460770] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:46:02,031 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:46:02,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 12:46:02,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680515697] [2021-12-14 12:46:02,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:46:02,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:46:02,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:46:02,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:46:02,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:46:02,033 INFO L87 Difference]: Start difference. First operand 7790 states and 8713 transitions. Second operand has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 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) [2021-12-14 12:46:03,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:46:03,625 INFO L93 Difference]: Finished difference Result 18559 states and 20913 transitions. [2021-12-14 12:46:03,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:46:03,625 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 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 331 [2021-12-14 12:46:03,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:46:03,642 INFO L225 Difference]: With dead ends: 18559 [2021-12-14 12:46:03,642 INFO L226 Difference]: Without dead ends: 10771 [2021-12-14 12:46:03,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:46:03,651 INFO L933 BasicCegarLoop]: 347 mSDtfsCounter, 413 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 1217 mSolverCounterSat, 267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 1484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 267 IncrementalHoareTripleChecker+Valid, 1217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-14 12:46:03,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [413 Valid, 402 Invalid, 1484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [267 Valid, 1217 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-14 12:46:03,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10771 states. [2021-12-14 12:46:03,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10771 to 9916. [2021-12-14 12:46:03,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9916 states, 9915 states have (on average 1.119415027735754) internal successors, (11099), 9915 states have internal predecessors, (11099), 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) [2021-12-14 12:46:03,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9916 states to 9916 states and 11099 transitions. [2021-12-14 12:46:03,765 INFO L78 Accepts]: Start accepts. Automaton has 9916 states and 11099 transitions. Word has length 331 [2021-12-14 12:46:03,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:46:03,765 INFO L470 AbstractCegarLoop]: Abstraction has 9916 states and 11099 transitions. [2021-12-14 12:46:03,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 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) [2021-12-14 12:46:03,766 INFO L276 IsEmpty]: Start isEmpty. Operand 9916 states and 11099 transitions. [2021-12-14 12:46:03,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2021-12-14 12:46:03,774 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:46:03,774 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:46:03,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 12:46:03,775 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:46:03,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:46:03,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1830021804, now seen corresponding path program 1 times [2021-12-14 12:46:03,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:46:03,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103800338] [2021-12-14 12:46:03,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:46:03,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:46:03,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:46:03,929 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 12:46:03,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:46:03,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103800338] [2021-12-14 12:46:03,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103800338] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:46:03,930 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:46:03,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 12:46:03,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330614028] [2021-12-14 12:46:03,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:46:03,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 12:46:03,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:46:03,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 12:46:03,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 12:46:03,933 INFO L87 Difference]: Start difference. First operand 9916 states and 11099 transitions. Second operand has 4 states, 4 states have (on average 99.5) internal successors, (398), 3 states have internal predecessors, (398), 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) [2021-12-14 12:46:06,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:46:06,245 INFO L93 Difference]: Finished difference Result 26239 states and 29414 transitions. [2021-12-14 12:46:06,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 12:46:06,246 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 99.5) internal successors, (398), 3 states have internal predecessors, (398), 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 398 [2021-12-14 12:46:06,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:46:06,271 INFO L225 Difference]: With dead ends: 26239 [2021-12-14 12:46:06,271 INFO L226 Difference]: Without dead ends: 15900 [2021-12-14 12:46:06,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 12:46:06,283 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 617 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 2438 mSolverCounterSat, 331 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 617 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 2769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 331 IncrementalHoareTripleChecker+Valid, 2438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-14 12:46:06,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [617 Valid, 209 Invalid, 2769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [331 Valid, 2438 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-14 12:46:06,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15900 states. [2021-12-14 12:46:06,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15900 to 15898. [2021-12-14 12:46:06,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15898 states, 15897 states have (on average 1.1247405170786942) internal successors, (17880), 15897 states have internal predecessors, (17880), 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) [2021-12-14 12:46:06,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15898 states to 15898 states and 17880 transitions. [2021-12-14 12:46:06,484 INFO L78 Accepts]: Start accepts. Automaton has 15898 states and 17880 transitions. Word has length 398 [2021-12-14 12:46:06,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:46:06,485 INFO L470 AbstractCegarLoop]: Abstraction has 15898 states and 17880 transitions. [2021-12-14 12:46:06,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 99.5) internal successors, (398), 3 states have internal predecessors, (398), 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) [2021-12-14 12:46:06,485 INFO L276 IsEmpty]: Start isEmpty. Operand 15898 states and 17880 transitions. [2021-12-14 12:46:06,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2021-12-14 12:46:06,497 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:46:06,497 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:46:06,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-14 12:46:06,498 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:46:06,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:46:06,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1181357117, now seen corresponding path program 1 times [2021-12-14 12:46:06,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:46:06,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056481786] [2021-12-14 12:46:06,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:46:06,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:46:06,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:46:06,610 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 322 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-12-14 12:46:06,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:46:06,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056481786] [2021-12-14 12:46:06,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056481786] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:46:06,611 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:46:06,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 12:46:06,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378273809] [2021-12-14 12:46:06,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:46:06,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:46:06,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:46:06,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:46:06,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:46:06,613 INFO L87 Difference]: Start difference. First operand 15898 states and 17880 transitions. Second operand has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 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) [2021-12-14 12:46:08,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:46:08,400 INFO L93 Difference]: Finished difference Result 44148 states and 49784 transitions. [2021-12-14 12:46:08,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:46:08,401 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 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 432 [2021-12-14 12:46:08,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:46:08,439 INFO L225 Difference]: With dead ends: 44148 [2021-12-14 12:46:08,439 INFO L226 Difference]: Without dead ends: 28252 [2021-12-14 12:46:08,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:46:08,457 INFO L933 BasicCegarLoop]: 240 mSDtfsCounter, 495 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 1317 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 1559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 1317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-14 12:46:08,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [495 Valid, 289 Invalid, 1559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 1317 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-14 12:46:08,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28252 states. [2021-12-14 12:46:08,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28252 to 26958. [2021-12-14 12:46:08,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26958 states, 26957 states have (on average 1.120525281003079) internal successors, (30206), 26957 states have internal predecessors, (30206), 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) [2021-12-14 12:46:08,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26958 states to 26958 states and 30206 transitions. [2021-12-14 12:46:08,771 INFO L78 Accepts]: Start accepts. Automaton has 26958 states and 30206 transitions. Word has length 432 [2021-12-14 12:46:08,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:46:08,771 INFO L470 AbstractCegarLoop]: Abstraction has 26958 states and 30206 transitions. [2021-12-14 12:46:08,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 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) [2021-12-14 12:46:08,772 INFO L276 IsEmpty]: Start isEmpty. Operand 26958 states and 30206 transitions. [2021-12-14 12:46:08,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2021-12-14 12:46:08,792 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:46:08,792 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:46:08,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-14 12:46:08,793 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:46:08,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:46:08,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1065401893, now seen corresponding path program 1 times [2021-12-14 12:46:08,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:46:08,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984577181] [2021-12-14 12:46:08,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:46:08,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:46:08,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:46:09,095 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 357 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-14 12:46:09,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:46:09,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984577181] [2021-12-14 12:46:09,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984577181] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:46:09,096 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:46:09,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 12:46:09,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042120127] [2021-12-14 12:46:09,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:46:09,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 12:46:09,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:46:09,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 12:46:09,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 12:46:09,099 INFO L87 Difference]: Start difference. First operand 26958 states and 30206 transitions. Second operand has 4 states, 4 states have (on average 103.25) internal successors, (413), 4 states have internal predecessors, (413), 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) [2021-12-14 12:46:11,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:46:11,788 INFO L93 Difference]: Finished difference Result 67545 states and 75867 transitions. [2021-12-14 12:46:11,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 12:46:11,789 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 103.25) internal successors, (413), 4 states have internal predecessors, (413), 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 494 [2021-12-14 12:46:11,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:46:11,838 INFO L225 Difference]: With dead ends: 67545 [2021-12-14 12:46:11,839 INFO L226 Difference]: Without dead ends: 40589 [2021-12-14 12:46:11,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 12:46:11,867 INFO L933 BasicCegarLoop]: 257 mSDtfsCounter, 652 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 2539 mSolverCounterSat, 285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 652 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 2824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 285 IncrementalHoareTripleChecker+Valid, 2539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-14 12:46:11,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [652 Valid, 372 Invalid, 2824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [285 Valid, 2539 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-14 12:46:11,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40589 states. [2021-12-14 12:46:12,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40589 to 36743. [2021-12-14 12:46:12,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36743 states, 36742 states have (on average 1.1217952207283217) internal successors, (41217), 36742 states have internal predecessors, (41217), 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) [2021-12-14 12:46:12,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36743 states to 36743 states and 41217 transitions. [2021-12-14 12:46:12,390 INFO L78 Accepts]: Start accepts. Automaton has 36743 states and 41217 transitions. Word has length 494 [2021-12-14 12:46:12,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:46:12,392 INFO L470 AbstractCegarLoop]: Abstraction has 36743 states and 41217 transitions. [2021-12-14 12:46:12,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 103.25) internal successors, (413), 4 states have internal predecessors, (413), 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) [2021-12-14 12:46:12,392 INFO L276 IsEmpty]: Start isEmpty. Operand 36743 states and 41217 transitions. [2021-12-14 12:46:12,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2021-12-14 12:46:12,412 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:46:12,412 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:46:12,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-14 12:46:12,413 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:46:12,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:46:12,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1598319857, now seen corresponding path program 1 times [2021-12-14 12:46:12,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:46:12,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323490275] [2021-12-14 12:46:12,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:46:12,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:46:12,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:46:12,613 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 170 proven. 0 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2021-12-14 12:46:12,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:46:12,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323490275] [2021-12-14 12:46:12,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323490275] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:46:12,614 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:46:12,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 12:46:12,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485294541] [2021-12-14 12:46:12,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:46:12,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:46:12,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:46:12,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:46:12,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:46:12,616 INFO L87 Difference]: Start difference. First operand 36743 states and 41217 transitions. Second operand has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 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) [2021-12-14 12:46:14,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:46:14,280 INFO L93 Difference]: Finished difference Result 70927 states and 79518 transitions. [2021-12-14 12:46:14,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:46:14,281 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 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 502 [2021-12-14 12:46:14,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:46:14,316 INFO L225 Difference]: With dead ends: 70927 [2021-12-14 12:46:14,316 INFO L226 Difference]: Without dead ends: 34186 [2021-12-14 12:46:14,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:46:14,338 INFO L933 BasicCegarLoop]: 297 mSDtfsCounter, 433 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 1206 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 1422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 1206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-14 12:46:14,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [433 Valid, 346 Invalid, 1422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 1206 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-14 12:46:14,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34186 states. [2021-12-14 12:46:14,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34186 to 32054. [2021-12-14 12:46:14,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32054 states, 32053 states have (on average 1.1198639752909243) internal successors, (35895), 32053 states have internal predecessors, (35895), 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) [2021-12-14 12:46:14,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32054 states to 32054 states and 35895 transitions. [2021-12-14 12:46:14,665 INFO L78 Accepts]: Start accepts. Automaton has 32054 states and 35895 transitions. Word has length 502 [2021-12-14 12:46:14,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:46:14,666 INFO L470 AbstractCegarLoop]: Abstraction has 32054 states and 35895 transitions. [2021-12-14 12:46:14,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 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) [2021-12-14 12:46:14,666 INFO L276 IsEmpty]: Start isEmpty. Operand 32054 states and 35895 transitions. [2021-12-14 12:46:14,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 627 [2021-12-14 12:46:14,767 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:46:14,768 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:46:14,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-14 12:46:14,768 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:46:14,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:46:14,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1392248039, now seen corresponding path program 1 times [2021-12-14 12:46:14,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:46:14,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415145553] [2021-12-14 12:46:14,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:46:14,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:46:14,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:46:14,995 INFO L134 CoverageAnalysis]: Checked inductivity of 668 backedges. 454 proven. 0 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2021-12-14 12:46:14,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:46:14,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415145553] [2021-12-14 12:46:14,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415145553] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:46:14,996 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:46:14,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 12:46:14,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756381992] [2021-12-14 12:46:14,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:46:14,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 12:46:14,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:46:14,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 12:46:14,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 12:46:14,998 INFO L87 Difference]: Start difference. First operand 32054 states and 35895 transitions. Second operand has 4 states, 4 states have (on average 121.0) internal successors, (484), 4 states have internal predecessors, (484), 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) [2021-12-14 12:46:17,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:46:17,972 INFO L93 Difference]: Finished difference Result 78606 states and 87589 transitions. [2021-12-14 12:46:17,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 12:46:17,973 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 121.0) internal successors, (484), 4 states have internal predecessors, (484), 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 626 [2021-12-14 12:46:17,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:46:18,018 INFO L225 Difference]: With dead ends: 78606 [2021-12-14 12:46:18,018 INFO L226 Difference]: Without dead ends: 44854 [2021-12-14 12:46:18,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 12:46:18,040 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 557 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 2649 mSolverCounterSat, 326 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 557 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 2975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 326 IncrementalHoareTripleChecker+Valid, 2649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-14 12:46:18,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [557 Valid, 309 Invalid, 2975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [326 Valid, 2649 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-14 12:46:18,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44854 states. [2021-12-14 12:46:18,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44854 to 44400. [2021-12-14 12:46:18,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44400 states, 44399 states have (on average 1.112705241109034) internal successors, (49403), 44399 states have internal predecessors, (49403), 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) [2021-12-14 12:46:18,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44400 states to 44400 states and 49403 transitions. [2021-12-14 12:46:18,476 INFO L78 Accepts]: Start accepts. Automaton has 44400 states and 49403 transitions. Word has length 626 [2021-12-14 12:46:18,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:46:18,477 INFO L470 AbstractCegarLoop]: Abstraction has 44400 states and 49403 transitions. [2021-12-14 12:46:18,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 121.0) internal successors, (484), 4 states have internal predecessors, (484), 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) [2021-12-14 12:46:18,477 INFO L276 IsEmpty]: Start isEmpty. Operand 44400 states and 49403 transitions. [2021-12-14 12:46:18,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 627 [2021-12-14 12:46:18,582 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:46:18,582 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:46:18,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-14 12:46:18,583 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:46:18,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:46:18,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1773124669, now seen corresponding path program 1 times [2021-12-14 12:46:18,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:46:18,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377244746] [2021-12-14 12:46:18,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:46:18,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:46:18,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:46:18,858 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 170 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-12-14 12:46:18,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:46:18,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377244746] [2021-12-14 12:46:18,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377244746] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:46:18,859 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:46:18,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 12:46:18,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003695073] [2021-12-14 12:46:18,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:46:18,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:46:18,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:46:18,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:46:18,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:46:18,861 INFO L87 Difference]: Start difference. First operand 44400 states and 49403 transitions. Second operand has 3 states, 3 states have (on average 154.66666666666666) internal successors, (464), 3 states have internal predecessors, (464), 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) [2021-12-14 12:46:20,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:46:20,434 INFO L93 Difference]: Finished difference Result 88792 states and 98798 transitions. [2021-12-14 12:46:20,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:46:20,435 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 154.66666666666666) internal successors, (464), 3 states have internal predecessors, (464), 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 626 [2021-12-14 12:46:20,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:46:20,469 INFO L225 Difference]: With dead ends: 88792 [2021-12-14 12:46:20,469 INFO L226 Difference]: Without dead ends: 44394 [2021-12-14 12:46:20,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:46:20,486 INFO L933 BasicCegarLoop]: 551 mSDtfsCounter, 571 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1172 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 571 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 1263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-14 12:46:20,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [571 Valid, 578 Invalid, 1263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1172 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-14 12:46:20,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44394 states. [2021-12-14 12:46:20,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44394 to 44393. [2021-12-14 12:46:20,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44393 states, 44392 states have (on average 1.111867003063615) internal successors, (49358), 44392 states have internal predecessors, (49358), 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) [2021-12-14 12:46:20,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44393 states to 44393 states and 49358 transitions. [2021-12-14 12:46:20,854 INFO L78 Accepts]: Start accepts. Automaton has 44393 states and 49358 transitions. Word has length 626 [2021-12-14 12:46:20,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:46:20,854 INFO L470 AbstractCegarLoop]: Abstraction has 44393 states and 49358 transitions. [2021-12-14 12:46:20,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 154.66666666666666) internal successors, (464), 3 states have internal predecessors, (464), 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) [2021-12-14 12:46:20,854 INFO L276 IsEmpty]: Start isEmpty. Operand 44393 states and 49358 transitions. [2021-12-14 12:46:20,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 643 [2021-12-14 12:46:20,872 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:46:20,873 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:46:20,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-14 12:46:20,873 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:46:20,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:46:20,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1662969585, now seen corresponding path program 1 times [2021-12-14 12:46:20,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:46:20,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472414445] [2021-12-14 12:46:20,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:46:20,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:46:21,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:46:21,160 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 227 proven. 0 refuted. 0 times theorem prover too weak. 514 trivial. 0 not checked. [2021-12-14 12:46:21,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:46:21,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472414445] [2021-12-14 12:46:21,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472414445] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:46:21,161 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:46:21,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 12:46:21,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142181760] [2021-12-14 12:46:21,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:46:21,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:46:21,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:46:21,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:46:21,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:46:21,163 INFO L87 Difference]: Start difference. First operand 44393 states and 49358 transitions. Second operand has 3 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 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) [2021-12-14 12:46:22,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:46:22,875 INFO L93 Difference]: Finished difference Result 95586 states and 106040 transitions. [2021-12-14 12:46:22,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:46:22,876 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 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 642 [2021-12-14 12:46:22,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:46:22,927 INFO L225 Difference]: With dead ends: 95586 [2021-12-14 12:46:22,927 INFO L226 Difference]: Without dead ends: 48634 [2021-12-14 12:46:23,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:46:23,085 INFO L933 BasicCegarLoop]: 784 mSDtfsCounter, 446 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 1168 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 844 SdHoareTripleChecker+Invalid, 1316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 1168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-14 12:46:23,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [446 Valid, 844 Invalid, 1316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 1168 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-14 12:46:23,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48634 states. [2021-12-14 12:46:23,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48634 to 46080. [2021-12-14 12:46:23,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46080 states, 46079 states have (on average 1.0976800711821002) internal successors, (50580), 46079 states have internal predecessors, (50580), 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) [2021-12-14 12:46:23,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46080 states to 46080 states and 50580 transitions. [2021-12-14 12:46:23,559 INFO L78 Accepts]: Start accepts. Automaton has 46080 states and 50580 transitions. Word has length 642 [2021-12-14 12:46:23,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:46:23,560 INFO L470 AbstractCegarLoop]: Abstraction has 46080 states and 50580 transitions. [2021-12-14 12:46:23,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 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) [2021-12-14 12:46:23,560 INFO L276 IsEmpty]: Start isEmpty. Operand 46080 states and 50580 transitions. [2021-12-14 12:46:23,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 675 [2021-12-14 12:46:23,589 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:46:23,589 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:46:23,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-14 12:46:23,590 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:46:23,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:46:23,590 INFO L85 PathProgramCache]: Analyzing trace with hash 321848541, now seen corresponding path program 1 times [2021-12-14 12:46:23,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:46:23,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527365592] [2021-12-14 12:46:23,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:46:23,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:46:23,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:46:23,903 INFO L134 CoverageAnalysis]: Checked inductivity of 773 backedges. 435 proven. 78 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2021-12-14 12:46:23,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:46:23,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527365592] [2021-12-14 12:46:23,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527365592] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 12:46:23,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689621636] [2021-12-14 12:46:23,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:46:23,906 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 12:46:23,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 12:46:23,908 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 12:46:23,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 12:46:24,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:46:24,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 850 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-14 12:46:24,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 12:46:25,517 INFO L134 CoverageAnalysis]: Checked inductivity of 773 backedges. 435 proven. 78 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2021-12-14 12:46:25,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 12:46:26,534 INFO L134 CoverageAnalysis]: Checked inductivity of 773 backedges. 513 proven. 0 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2021-12-14 12:46:26,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689621636] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-14 12:46:26,534 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-14 12:46:26,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2021-12-14 12:46:26,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044449002] [2021-12-14 12:46:26,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:46:26,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 12:46:26,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:46:26,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 12:46:26,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-14 12:46:26,536 INFO L87 Difference]: Start difference. First operand 46080 states and 50580 transitions. Second operand has 4 states, 4 states have (on average 118.25) internal successors, (473), 3 states have internal predecessors, (473), 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) [2021-12-14 12:46:29,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:46:29,486 INFO L93 Difference]: Finished difference Result 119842 states and 131835 transitions. [2021-12-14 12:46:29,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 12:46:29,487 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 118.25) internal successors, (473), 3 states have internal predecessors, (473), 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 674 [2021-12-14 12:46:29,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:46:29,581 INFO L225 Difference]: With dead ends: 119842 [2021-12-14 12:46:29,582 INFO L226 Difference]: Without dead ends: 72910 [2021-12-14 12:46:29,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1349 GetRequests, 1343 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-14 12:46:29,625 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 835 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 2290 mSolverCounterSat, 489 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 835 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 2779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 489 IncrementalHoareTripleChecker+Valid, 2290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-14 12:46:29,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [835 Valid, 178 Invalid, 2779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [489 Valid, 2290 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-14 12:46:29,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72910 states. [2021-12-14 12:46:30,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72910 to 64399. [2021-12-14 12:46:30,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64399 states, 64398 states have (on average 1.0983415634025901) internal successors, (70731), 64398 states have internal predecessors, (70731), 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) [2021-12-14 12:46:30,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64399 states to 64399 states and 70731 transitions. [2021-12-14 12:46:30,430 INFO L78 Accepts]: Start accepts. Automaton has 64399 states and 70731 transitions. Word has length 674 [2021-12-14 12:46:30,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:46:30,431 INFO L470 AbstractCegarLoop]: Abstraction has 64399 states and 70731 transitions. [2021-12-14 12:46:30,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 118.25) internal successors, (473), 3 states have internal predecessors, (473), 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) [2021-12-14 12:46:30,431 INFO L276 IsEmpty]: Start isEmpty. Operand 64399 states and 70731 transitions. [2021-12-14 12:46:30,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 678 [2021-12-14 12:46:30,459 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:46:30,459 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:46:30,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-14 12:46:30,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-14 12:46:30,683 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:46:30,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:46:30,683 INFO L85 PathProgramCache]: Analyzing trace with hash -891111486, now seen corresponding path program 1 times [2021-12-14 12:46:30,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:46:30,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003679203] [2021-12-14 12:46:30,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:46:30,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:46:30,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:46:30,903 INFO L134 CoverageAnalysis]: Checked inductivity of 913 backedges. 544 proven. 0 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2021-12-14 12:46:30,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:46:30,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003679203] [2021-12-14 12:46:30,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003679203] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:46:30,904 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:46:30,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 12:46:30,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891441110] [2021-12-14 12:46:30,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:46:30,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:46:30,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:46:30,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:46:30,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:46:30,907 INFO L87 Difference]: Start difference. First operand 64399 states and 70731 transitions. Second operand has 3 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 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) [2021-12-14 12:46:33,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:46:33,093 INFO L93 Difference]: Finished difference Result 139850 states and 153665 transitions. [2021-12-14 12:46:33,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:46:33,095 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 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 677 [2021-12-14 12:46:33,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:46:33,181 INFO L225 Difference]: With dead ends: 139850 [2021-12-14 12:46:33,182 INFO L226 Difference]: Without dead ends: 71622 [2021-12-14 12:46:33,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:46:33,218 INFO L933 BasicCegarLoop]: 658 mSDtfsCounter, 495 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 1167 mSolverCounterSat, 254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 701 SdHoareTripleChecker+Invalid, 1421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 1167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-14 12:46:33,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [495 Valid, 701 Invalid, 1421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [254 Valid, 1167 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-14 12:46:33,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71622 states. [2021-12-14 12:46:33,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71622 to 54146. [2021-12-14 12:46:33,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54146 states, 54145 states have (on average 1.0846800258564964) internal successors, (58730), 54145 states have internal predecessors, (58730), 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) [2021-12-14 12:46:33,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54146 states to 54146 states and 58730 transitions. [2021-12-14 12:46:33,950 INFO L78 Accepts]: Start accepts. Automaton has 54146 states and 58730 transitions. Word has length 677 [2021-12-14 12:46:33,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:46:33,950 INFO L470 AbstractCegarLoop]: Abstraction has 54146 states and 58730 transitions. [2021-12-14 12:46:33,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 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) [2021-12-14 12:46:33,950 INFO L276 IsEmpty]: Start isEmpty. Operand 54146 states and 58730 transitions. [2021-12-14 12:46:33,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 816 [2021-12-14 12:46:33,986 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:46:33,986 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:46:33,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-14 12:46:33,987 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:46:33,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:46:33,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1712345726, now seen corresponding path program 1 times [2021-12-14 12:46:33,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:46:33,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210450940] [2021-12-14 12:46:33,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:46:33,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:46:34,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:46:34,587 INFO L134 CoverageAnalysis]: Checked inductivity of 825 backedges. 233 proven. 347 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-12-14 12:46:34,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:46:34,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210450940] [2021-12-14 12:46:34,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210450940] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 12:46:34,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576012766] [2021-12-14 12:46:34,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:46:34,588 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 12:46:34,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 12:46:34,589 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 12:46:34,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 12:46:34,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:46:34,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 986 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-14 12:46:34,822 INFO L286 TraceCheckSpWp]: Computing forward predicates...