./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label05.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label05.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 22537e02f4cb8698af716d464e1d3c3736fc7fa276fb73e44b45e0b685f49af8 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 20:52:15,886 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 20:52:15,891 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 20:52:15,931 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 20:52:15,931 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 20:52:15,934 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 20:52:15,935 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 20:52:15,937 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 20:52:15,938 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 20:52:15,941 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 20:52:15,942 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 20:52:15,943 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 20:52:15,943 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 20:52:15,945 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 20:52:15,947 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 20:52:15,949 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 20:52:15,950 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 20:52:15,950 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 20:52:15,952 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 20:52:15,956 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 20:52:15,957 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 20:52:15,958 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 20:52:15,959 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 20:52:15,960 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 20:52:15,968 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 20:52:15,968 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 20:52:15,968 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 20:52:15,969 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 20:52:15,970 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 20:52:15,970 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 20:52:15,971 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 20:52:15,971 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 20:52:15,972 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 20:52:15,973 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 20:52:15,974 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 20:52:15,974 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 20:52:15,975 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 20:52:15,975 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 20:52:15,976 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 20:52:15,976 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 20:52:15,977 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 20:52:15,987 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 20:52:16,009 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 20:52:16,010 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 20:52:16,010 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 20:52:16,010 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 20:52:16,011 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 20:52:16,011 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 20:52:16,012 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 20:52:16,012 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 20:52:16,012 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 20:52:16,013 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 20:52:16,013 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 20:52:16,013 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 20:52:16,014 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 20:52:16,014 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 20:52:16,014 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 20:52:16,014 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 20:52:16,014 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 20:52:16,014 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 20:52:16,014 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 20:52:16,015 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 20:52:16,015 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 20:52:16,015 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 20:52:16,015 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 20:52:16,015 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 20:52:16,015 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 20:52:16,016 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 20:52:16,016 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 20:52:16,016 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 20:52:16,016 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 20:52:16,016 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 20:52:16,016 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 20:52:16,017 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 20:52:16,017 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 20:52:16,017 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 20:52:16,017 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 22537e02f4cb8698af716d464e1d3c3736fc7fa276fb73e44b45e0b685f49af8 [2021-12-17 20:52:16,200 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 20:52:16,226 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 20:52:16,228 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 20:52:16,229 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 20:52:16,230 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 20:52:16,231 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label05.c [2021-12-17 20:52:16,285 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14b761ad1/c5878b92494b495b85bc8ec903d58d10/FLAGea4678615 [2021-12-17 20:52:16,811 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 20:52:16,812 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label05.c [2021-12-17 20:52:16,839 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14b761ad1/c5878b92494b495b85bc8ec903d58d10/FLAGea4678615 [2021-12-17 20:52:17,302 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14b761ad1/c5878b92494b495b85bc8ec903d58d10 [2021-12-17 20:52:17,304 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 20:52:17,305 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 20:52:17,307 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 20:52:17,308 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 20:52:17,310 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 20:52:17,310 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 08:52:17" (1/1) ... [2021-12-17 20:52:17,311 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3af8eac4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:52:17, skipping insertion in model container [2021-12-17 20:52:17,311 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 08:52:17" (1/1) ... [2021-12-17 20:52:17,316 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 20:52:17,414 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 20:52:17,670 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/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label05.c[11640,11653] [2021-12-17 20:52:17,705 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/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label05.c[18576,18589] [2021-12-17 20:52:18,153 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 20:52:18,160 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 20:52:18,192 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/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label05.c[11640,11653] [2021-12-17 20:52:18,201 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/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label05.c[18576,18589] [2021-12-17 20:52:18,484 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 20:52:18,504 INFO L208 MainTranslator]: Completed translation [2021-12-17 20:52:18,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:52:18 WrapperNode [2021-12-17 20:52:18,504 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 20:52:18,505 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 20:52:18,506 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 20:52:18,506 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 20:52:18,510 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:52:18" (1/1) ... [2021-12-17 20:52:18,546 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:52:18" (1/1) ... [2021-12-17 20:52:18,794 INFO L137 Inliner]: procedures = 36, calls = 22, calls flagged for inlining = 17, calls inlined = 17, statements flattened = 5090 [2021-12-17 20:52:18,795 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 20:52:18,796 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 20:52:18,796 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 20:52:18,796 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 20:52:18,802 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:52:18" (1/1) ... [2021-12-17 20:52:18,802 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:52:18" (1/1) ... [2021-12-17 20:52:18,895 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:52:18" (1/1) ... [2021-12-17 20:52:18,896 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:52:18" (1/1) ... [2021-12-17 20:52:19,088 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:52:18" (1/1) ... [2021-12-17 20:52:19,120 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:52:18" (1/1) ... [2021-12-17 20:52:19,177 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:52:18" (1/1) ... [2021-12-17 20:52:19,257 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 20:52:19,258 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 20:52:19,259 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 20:52:19,259 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 20:52:19,261 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:52:18" (1/1) ... [2021-12-17 20:52:19,265 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 20:52:19,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 20:52:19,313 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) [2021-12-17 20:52:19,319 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 [2021-12-17 20:52:19,344 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 20:52:19,344 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 20:52:19,344 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 20:52:19,344 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 20:52:19,417 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 20:52:19,418 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 20:52:22,016 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 20:52:22,034 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 20:52:22,034 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-17 20:52:22,037 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 08:52:22 BoogieIcfgContainer [2021-12-17 20:52:22,038 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 20:52:22,040 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 20:52:22,040 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 20:52:22,043 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 20:52:22,043 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 08:52:17" (1/3) ... [2021-12-17 20:52:22,044 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@474b7bb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 08:52:22, skipping insertion in model container [2021-12-17 20:52:22,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:52:18" (2/3) ... [2021-12-17 20:52:22,044 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@474b7bb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 08:52:22, skipping insertion in model container [2021-12-17 20:52:22,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 08:52:22" (3/3) ... [2021-12-17 20:52:22,045 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label05.c [2021-12-17 20:52:22,051 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 20:52:22,052 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-17 20:52:22,097 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 20:52:22,103 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 [2021-12-17 20:52:22,103 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-17 20:52:22,134 INFO L276 IsEmpty]: Start isEmpty. Operand has 909 states, 906 states have (on average 1.900662251655629) internal successors, (1722), 908 states have internal predecessors, (1722), 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) [2021-12-17 20:52:22,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-17 20:52:22,141 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:52:22,142 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] [2021-12-17 20:52:22,142 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:52:22,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:52:22,147 INFO L85 PathProgramCache]: Analyzing trace with hash -441366565, now seen corresponding path program 1 times [2021-12-17 20:52:22,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:52:22,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297797984] [2021-12-17 20:52:22,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:52:22,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:52:22,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:52:22,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:52:22,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:52:22,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297797984] [2021-12-17 20:52:22,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297797984] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:52:22,327 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:52:22,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 20:52:22,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006893900] [2021-12-17 20:52:22,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:52:22,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 20:52:22,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:52:22,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 20:52:22,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 20:52:22,361 INFO L87 Difference]: Start difference. First operand has 909 states, 906 states have (on average 1.900662251655629) internal successors, (1722), 908 states have internal predecessors, (1722), 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 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 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) [2021-12-17 20:52:22,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:52:22,422 INFO L93 Difference]: Finished difference Result 1781 states and 3374 transitions. [2021-12-17 20:52:22,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 20:52:22,424 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 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 34 [2021-12-17 20:52:22,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:52:22,436 INFO L225 Difference]: With dead ends: 1781 [2021-12-17 20:52:22,436 INFO L226 Difference]: Without dead ends: 843 [2021-12-17 20:52:22,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 20:52:22,444 INFO L933 BasicCegarLoop]: 1656 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1656 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 20:52:22,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1656 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:52:22,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2021-12-17 20:52:22,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 843. [2021-12-17 20:52:22,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 843 states, 841 states have (on average 1.8894173602853745) internal successors, (1589), 842 states have internal predecessors, (1589), 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) [2021-12-17 20:52:22,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 1589 transitions. [2021-12-17 20:52:22,518 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 1589 transitions. Word has length 34 [2021-12-17 20:52:22,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:52:22,519 INFO L470 AbstractCegarLoop]: Abstraction has 843 states and 1589 transitions. [2021-12-17 20:52:22,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 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) [2021-12-17 20:52:22,519 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 1589 transitions. [2021-12-17 20:52:22,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-17 20:52:22,520 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:52:22,520 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] [2021-12-17 20:52:22,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 20:52:22,520 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:52:22,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:52:22,521 INFO L85 PathProgramCache]: Analyzing trace with hash -950839655, now seen corresponding path program 1 times [2021-12-17 20:52:22,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:52:22,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081777380] [2021-12-17 20:52:22,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:52:22,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:52:22,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:52:22,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:52:22,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:52:22,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081777380] [2021-12-17 20:52:22,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081777380] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:52:22,622 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:52:22,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 20:52:22,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990086379] [2021-12-17 20:52:22,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:52:22,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 20:52:22,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:52:22,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 20:52:22,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 20:52:22,625 INFO L87 Difference]: Start difference. First operand 843 states and 1589 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 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) [2021-12-17 20:52:22,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:52:22,753 INFO L93 Difference]: Finished difference Result 899 states and 1675 transitions. [2021-12-17 20:52:22,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 20:52:22,753 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 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 34 [2021-12-17 20:52:22,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:52:22,760 INFO L225 Difference]: With dead ends: 899 [2021-12-17 20:52:22,768 INFO L226 Difference]: Without dead ends: 843 [2021-12-17 20:52:22,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-17 20:52:22,769 INFO L933 BasicCegarLoop]: 1587 mSDtfsCounter, 3 mSDsluCounter, 4727 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6314 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 20:52:22,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 6314 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:52:22,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2021-12-17 20:52:22,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 843. [2021-12-17 20:52:22,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 843 states, 841 states have (on average 1.8525564803804995) internal successors, (1558), 842 states have internal predecessors, (1558), 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) [2021-12-17 20:52:22,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 1558 transitions. [2021-12-17 20:52:22,793 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 1558 transitions. Word has length 34 [2021-12-17 20:52:22,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:52:22,793 INFO L470 AbstractCegarLoop]: Abstraction has 843 states and 1558 transitions. [2021-12-17 20:52:22,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 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) [2021-12-17 20:52:22,794 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 1558 transitions. [2021-12-17 20:52:22,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-17 20:52:22,795 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:52:22,795 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:52:22,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 20:52:22,795 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:52:22,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:52:22,796 INFO L85 PathProgramCache]: Analyzing trace with hash 2075627621, now seen corresponding path program 1 times [2021-12-17 20:52:22,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:52:22,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089485431] [2021-12-17 20:52:22,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:52:22,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:52:22,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:52:22,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:52:22,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:52:22,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089485431] [2021-12-17 20:52:22,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089485431] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:52:22,901 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:52:22,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 20:52:22,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957303748] [2021-12-17 20:52:22,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:52:22,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 20:52:22,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:52:22,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 20:52:22,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 20:52:22,903 INFO L87 Difference]: Start difference. First operand 843 states and 1558 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 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) [2021-12-17 20:52:27,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:52:27,795 INFO L93 Difference]: Finished difference Result 3098 states and 5867 transitions. [2021-12-17 20:52:27,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 20:52:27,796 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 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 60 [2021-12-17 20:52:27,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:52:27,803 INFO L225 Difference]: With dead ends: 3098 [2021-12-17 20:52:27,803 INFO L226 Difference]: Without dead ends: 2345 [2021-12-17 20:52:27,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 20:52:27,805 INFO L933 BasicCegarLoop]: 794 mSDtfsCounter, 2423 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 5354 mSolverCounterSat, 1161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2423 SdHoareTripleChecker+Valid, 812 SdHoareTripleChecker+Invalid, 6515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1161 IncrementalHoareTripleChecker+Valid, 5354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-12-17 20:52:27,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2423 Valid, 812 Invalid, 6515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1161 Valid, 5354 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2021-12-17 20:52:27,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2345 states. [2021-12-17 20:52:27,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2345 to 2345. [2021-12-17 20:52:27,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2345 states, 2343 states have (on average 1.5672215108834826) internal successors, (3672), 2344 states have internal predecessors, (3672), 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) [2021-12-17 20:52:27,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2345 states to 2345 states and 3672 transitions. [2021-12-17 20:52:27,846 INFO L78 Accepts]: Start accepts. Automaton has 2345 states and 3672 transitions. Word has length 60 [2021-12-17 20:52:27,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:52:27,847 INFO L470 AbstractCegarLoop]: Abstraction has 2345 states and 3672 transitions. [2021-12-17 20:52:27,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 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) [2021-12-17 20:52:27,847 INFO L276 IsEmpty]: Start isEmpty. Operand 2345 states and 3672 transitions. [2021-12-17 20:52:27,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-17 20:52:27,849 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:52:27,849 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:52:27,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 20:52:27,849 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:52:27,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:52:27,850 INFO L85 PathProgramCache]: Analyzing trace with hash -695028240, now seen corresponding path program 1 times [2021-12-17 20:52:27,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:52:27,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927747806] [2021-12-17 20:52:27,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:52:27,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:52:27,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:52:27,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:52:27,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:52:27,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927747806] [2021-12-17 20:52:27,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927747806] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:52:27,897 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:52:27,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 20:52:27,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251760147] [2021-12-17 20:52:27,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:52:27,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 20:52:27,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:52:27,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 20:52:27,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:52:27,899 INFO L87 Difference]: Start difference. First operand 2345 states and 3672 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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) [2021-12-17 20:52:27,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:52:27,923 INFO L93 Difference]: Finished difference Result 2443 states and 3826 transitions. [2021-12-17 20:52:27,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 20:52:27,923 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 64 [2021-12-17 20:52:27,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:52:27,930 INFO L225 Difference]: With dead ends: 2443 [2021-12-17 20:52:27,931 INFO L226 Difference]: Without dead ends: 2391 [2021-12-17 20:52:27,932 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 [2021-12-17 20:52:27,933 INFO L933 BasicCegarLoop]: 1626 mSDtfsCounter, 1511 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1511 SdHoareTripleChecker+Valid, 1706 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 20:52:27,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1511 Valid, 1706 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:52:27,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2391 states. [2021-12-17 20:52:27,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2391 to 2389. [2021-12-17 20:52:27,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2389 states, 2387 states have (on average 1.5676581483033096) internal successors, (3742), 2388 states have internal predecessors, (3742), 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) [2021-12-17 20:52:27,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2389 states to 2389 states and 3742 transitions. [2021-12-17 20:52:27,977 INFO L78 Accepts]: Start accepts. Automaton has 2389 states and 3742 transitions. Word has length 64 [2021-12-17 20:52:27,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:52:27,977 INFO L470 AbstractCegarLoop]: Abstraction has 2389 states and 3742 transitions. [2021-12-17 20:52:27,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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) [2021-12-17 20:52:27,978 INFO L276 IsEmpty]: Start isEmpty. Operand 2389 states and 3742 transitions. [2021-12-17 20:52:27,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-17 20:52:27,979 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:52:27,979 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:52:27,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 20:52:27,979 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:52:27,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:52:27,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1440610970, now seen corresponding path program 1 times [2021-12-17 20:52:27,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:52:27,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100212203] [2021-12-17 20:52:27,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:52:27,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:52:27,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:52:28,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:52:28,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:52:28,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100212203] [2021-12-17 20:52:28,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100212203] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:52:28,018 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:52:28,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 20:52:28,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80358998] [2021-12-17 20:52:28,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:52:28,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 20:52:28,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:52:28,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 20:52:28,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:52:28,020 INFO L87 Difference]: Start difference. First operand 2389 states and 3742 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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) [2021-12-17 20:52:28,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:52:28,044 INFO L93 Difference]: Finished difference Result 2569 states and 4026 transitions. [2021-12-17 20:52:28,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 20:52:28,045 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 64 [2021-12-17 20:52:28,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:52:28,052 INFO L225 Difference]: With dead ends: 2569 [2021-12-17 20:52:28,052 INFO L226 Difference]: Without dead ends: 2473 [2021-12-17 20:52:28,053 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 [2021-12-17 20:52:28,054 INFO L933 BasicCegarLoop]: 1621 mSDtfsCounter, 1507 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1507 SdHoareTripleChecker+Valid, 1705 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 20:52:28,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1507 Valid, 1705 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:52:28,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2473 states. [2021-12-17 20:52:28,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2473 to 2471. [2021-12-17 20:52:28,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2471 states, 2469 states have (on average 1.5678412312677197) internal successors, (3871), 2470 states have internal predecessors, (3871), 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) [2021-12-17 20:52:28,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2471 states to 2471 states and 3871 transitions. [2021-12-17 20:52:28,099 INFO L78 Accepts]: Start accepts. Automaton has 2471 states and 3871 transitions. Word has length 64 [2021-12-17 20:52:28,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:52:28,102 INFO L470 AbstractCegarLoop]: Abstraction has 2471 states and 3871 transitions. [2021-12-17 20:52:28,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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) [2021-12-17 20:52:28,102 INFO L276 IsEmpty]: Start isEmpty. Operand 2471 states and 3871 transitions. [2021-12-17 20:52:28,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-17 20:52:28,104 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:52:28,104 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:52:28,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 20:52:28,104 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:52:28,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:52:28,109 INFO L85 PathProgramCache]: Analyzing trace with hash 914325468, now seen corresponding path program 1 times [2021-12-17 20:52:28,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:52:28,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168909589] [2021-12-17 20:52:28,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:52:28,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:52:28,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:52:28,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:52:28,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:52:28,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168909589] [2021-12-17 20:52:28,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168909589] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:52:28,198 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:52:28,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 20:52:28,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832416191] [2021-12-17 20:52:28,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:52:28,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 20:52:28,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:52:28,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 20:52:28,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:52:28,202 INFO L87 Difference]: Start difference. First operand 2471 states and 3871 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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) [2021-12-17 20:52:28,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:52:28,231 INFO L93 Difference]: Finished difference Result 2803 states and 4393 transitions. [2021-12-17 20:52:28,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 20:52:28,232 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 64 [2021-12-17 20:52:28,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:52:28,240 INFO L225 Difference]: With dead ends: 2803 [2021-12-17 20:52:28,240 INFO L226 Difference]: Without dead ends: 2625 [2021-12-17 20:52:28,242 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 [2021-12-17 20:52:28,245 INFO L933 BasicCegarLoop]: 1616 mSDtfsCounter, 1503 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1503 SdHoareTripleChecker+Valid, 1704 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 20:52:28,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1503 Valid, 1704 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:52:28,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2625 states. [2021-12-17 20:52:28,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2625 to 2623. [2021-12-17 20:52:28,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2623 states, 2621 states have (on average 1.566959175887066) internal successors, (4107), 2622 states have internal predecessors, (4107), 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) [2021-12-17 20:52:28,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2623 states to 2623 states and 4107 transitions. [2021-12-17 20:52:28,302 INFO L78 Accepts]: Start accepts. Automaton has 2623 states and 4107 transitions. Word has length 64 [2021-12-17 20:52:28,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:52:28,302 INFO L470 AbstractCegarLoop]: Abstraction has 2623 states and 4107 transitions. [2021-12-17 20:52:28,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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) [2021-12-17 20:52:28,302 INFO L276 IsEmpty]: Start isEmpty. Operand 2623 states and 4107 transitions. [2021-12-17 20:52:28,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-17 20:52:28,304 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:52:28,304 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:52:28,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 20:52:28,305 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:52:28,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:52:28,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1701027568, now seen corresponding path program 1 times [2021-12-17 20:52:28,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:52:28,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937430652] [2021-12-17 20:52:28,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:52:28,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:52:28,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:52:28,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:52:28,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:52:28,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937430652] [2021-12-17 20:52:28,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937430652] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:52:28,369 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:52:28,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 20:52:28,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421195926] [2021-12-17 20:52:28,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:52:28,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 20:52:28,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:52:28,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 20:52:28,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:52:28,372 INFO L87 Difference]: Start difference. First operand 2623 states and 4107 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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) [2021-12-17 20:52:28,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:52:28,403 INFO L93 Difference]: Finished difference Result 3235 states and 5061 transitions. [2021-12-17 20:52:28,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 20:52:28,404 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 64 [2021-12-17 20:52:28,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:52:28,412 INFO L225 Difference]: With dead ends: 3235 [2021-12-17 20:52:28,413 INFO L226 Difference]: Without dead ends: 2905 [2021-12-17 20:52:28,414 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 [2021-12-17 20:52:28,415 INFO L933 BasicCegarLoop]: 1611 mSDtfsCounter, 1499 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1499 SdHoareTripleChecker+Valid, 1703 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 20:52:28,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1499 Valid, 1703 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:52:28,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2905 states. [2021-12-17 20:52:28,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2905 to 2903. [2021-12-17 20:52:28,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2903 states, 2901 states have (on average 1.5632540503274732) internal successors, (4535), 2902 states have internal predecessors, (4535), 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) [2021-12-17 20:52:28,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2903 states to 2903 states and 4535 transitions. [2021-12-17 20:52:28,468 INFO L78 Accepts]: Start accepts. Automaton has 2903 states and 4535 transitions. Word has length 64 [2021-12-17 20:52:28,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:52:28,468 INFO L470 AbstractCegarLoop]: Abstraction has 2903 states and 4535 transitions. [2021-12-17 20:52:28,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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) [2021-12-17 20:52:28,468 INFO L276 IsEmpty]: Start isEmpty. Operand 2903 states and 4535 transitions. [2021-12-17 20:52:28,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-17 20:52:28,469 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:52:28,469 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:52:28,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 20:52:28,470 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:52:28,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:52:28,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1105068988, now seen corresponding path program 1 times [2021-12-17 20:52:28,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:52:28,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681444097] [2021-12-17 20:52:28,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:52:28,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:52:28,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:52:28,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:52:28,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:52:28,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681444097] [2021-12-17 20:52:28,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681444097] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:52:28,507 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:52:28,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 20:52:28,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451320552] [2021-12-17 20:52:28,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:52:28,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 20:52:28,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:52:28,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 20:52:28,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:52:28,508 INFO L87 Difference]: Start difference. First operand 2903 states and 4535 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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) [2021-12-17 20:52:28,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:52:28,577 INFO L93 Difference]: Finished difference Result 4027 states and 6265 transitions. [2021-12-17 20:52:28,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 20:52:28,577 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 64 [2021-12-17 20:52:28,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:52:28,587 INFO L225 Difference]: With dead ends: 4027 [2021-12-17 20:52:28,587 INFO L226 Difference]: Without dead ends: 3417 [2021-12-17 20:52:28,589 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 [2021-12-17 20:52:28,589 INFO L933 BasicCegarLoop]: 1606 mSDtfsCounter, 1495 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1495 SdHoareTripleChecker+Valid, 1702 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 20:52:28,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1495 Valid, 1702 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:52:28,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3417 states. [2021-12-17 20:52:28,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3417 to 3415. [2021-12-17 20:52:28,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3415 states, 3413 states have (on average 1.553765016114855) internal successors, (5303), 3414 states have internal predecessors, (5303), 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) [2021-12-17 20:52:28,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3415 states to 3415 states and 5303 transitions. [2021-12-17 20:52:28,661 INFO L78 Accepts]: Start accepts. Automaton has 3415 states and 5303 transitions. Word has length 64 [2021-12-17 20:52:28,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:52:28,662 INFO L470 AbstractCegarLoop]: Abstraction has 3415 states and 5303 transitions. [2021-12-17 20:52:28,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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) [2021-12-17 20:52:28,663 INFO L276 IsEmpty]: Start isEmpty. Operand 3415 states and 5303 transitions. [2021-12-17 20:52:28,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-17 20:52:28,664 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:52:28,664 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:52:28,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 20:52:28,665 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:52:28,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:52:28,665 INFO L85 PathProgramCache]: Analyzing trace with hash 112916410, now seen corresponding path program 1 times [2021-12-17 20:52:28,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:52:28,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096777348] [2021-12-17 20:52:28,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:52:28,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:52:28,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:52:28,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:52:28,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:52:28,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096777348] [2021-12-17 20:52:28,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096777348] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:52:28,728 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:52:28,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 20:52:28,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469142182] [2021-12-17 20:52:28,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:52:28,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 20:52:28,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:52:28,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 20:52:28,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 20:52:28,730 INFO L87 Difference]: Start difference. First operand 3415 states and 5303 transitions. Second operand has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 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) [2021-12-17 20:52:29,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:52:29,081 INFO L93 Difference]: Finished difference Result 14635 states and 22433 transitions. [2021-12-17 20:52:29,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 20:52:29,081 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 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 64 [2021-12-17 20:52:29,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:52:29,126 INFO L225 Difference]: With dead ends: 14635 [2021-12-17 20:52:29,127 INFO L226 Difference]: Without dead ends: 13513 [2021-12-17 20:52:29,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-12-17 20:52:29,137 INFO L933 BasicCegarLoop]: 1552 mSDtfsCounter, 8512 mSDsluCounter, 840 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8512 SdHoareTripleChecker+Valid, 2392 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 20:52:29,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8512 Valid, 2392 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 20:52:29,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13513 states. [2021-12-17 20:52:29,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13513 to 4535. [2021-12-17 20:52:29,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4535 states, 4533 states have (on average 1.5334215751158173) internal successors, (6951), 4534 states have internal predecessors, (6951), 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) [2021-12-17 20:52:29,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4535 states to 4535 states and 6951 transitions. [2021-12-17 20:52:29,418 INFO L78 Accepts]: Start accepts. Automaton has 4535 states and 6951 transitions. Word has length 64 [2021-12-17 20:52:29,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:52:29,418 INFO L470 AbstractCegarLoop]: Abstraction has 4535 states and 6951 transitions. [2021-12-17 20:52:29,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 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) [2021-12-17 20:52:29,419 INFO L276 IsEmpty]: Start isEmpty. Operand 4535 states and 6951 transitions. [2021-12-17 20:52:29,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-17 20:52:29,419 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:52:29,419 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:52:29,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 20:52:29,422 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:52:29,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:52:29,423 INFO L85 PathProgramCache]: Analyzing trace with hash -277208054, now seen corresponding path program 1 times [2021-12-17 20:52:29,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:52:29,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825213747] [2021-12-17 20:52:29,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:52:29,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:52:29,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:52:29,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:52:29,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:52:29,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825213747] [2021-12-17 20:52:29,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825213747] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:52:29,457 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:52:29,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 20:52:29,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676832173] [2021-12-17 20:52:29,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:52:29,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 20:52:29,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:52:29,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 20:52:29,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:52:29,458 INFO L87 Difference]: Start difference. First operand 4535 states and 6951 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:52:29,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:52:29,595 INFO L93 Difference]: Finished difference Result 7821 states and 11867 transitions. [2021-12-17 20:52:29,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 20:52:29,595 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-12-17 20:52:29,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:52:29,605 INFO L225 Difference]: With dead ends: 7821 [2021-12-17 20:52:29,605 INFO L226 Difference]: Without dead ends: 5579 [2021-12-17 20:52:29,609 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 [2021-12-17 20:52:29,610 INFO L933 BasicCegarLoop]: 1588 mSDtfsCounter, 1487 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1487 SdHoareTripleChecker+Valid, 1665 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 20:52:29,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1487 Valid, 1665 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:52:29,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5579 states. [2021-12-17 20:52:29,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5579 to 5577. [2021-12-17 20:52:29,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5577 states, 5575 states have (on average 1.51695067264574) internal successors, (8457), 5576 states have internal predecessors, (8457), 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) [2021-12-17 20:52:29,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5577 states to 5577 states and 8457 transitions. [2021-12-17 20:52:29,794 INFO L78 Accepts]: Start accepts. Automaton has 5577 states and 8457 transitions. Word has length 66 [2021-12-17 20:52:29,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:52:29,794 INFO L470 AbstractCegarLoop]: Abstraction has 5577 states and 8457 transitions. [2021-12-17 20:52:29,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:52:29,795 INFO L276 IsEmpty]: Start isEmpty. Operand 5577 states and 8457 transitions. [2021-12-17 20:52:29,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-17 20:52:29,795 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:52:29,796 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:52:29,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-17 20:52:29,796 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:52:29,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:52:29,797 INFO L85 PathProgramCache]: Analyzing trace with hash -210714542, now seen corresponding path program 1 times [2021-12-17 20:52:29,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:52:29,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673139288] [2021-12-17 20:52:29,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:52:29,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:52:29,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:52:29,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:52:29,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:52:29,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673139288] [2021-12-17 20:52:29,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673139288] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:52:29,940 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:52:29,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 20:52:29,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182098777] [2021-12-17 20:52:29,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:52:29,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 20:52:29,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:52:29,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 20:52:29,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-17 20:52:29,942 INFO L87 Difference]: Start difference. First operand 5577 states and 8457 transitions. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:52:30,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:52:30,193 INFO L93 Difference]: Finished difference Result 8861 states and 13323 transitions. [2021-12-17 20:52:30,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 20:52:30,194 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-12-17 20:52:30,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:52:30,203 INFO L225 Difference]: With dead ends: 8861 [2021-12-17 20:52:30,203 INFO L226 Difference]: Without dead ends: 5579 [2021-12-17 20:52:30,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-12-17 20:52:30,209 INFO L933 BasicCegarLoop]: 1551 mSDtfsCounter, 4654 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4654 SdHoareTripleChecker+Valid, 1867 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 20:52:30,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4654 Valid, 1867 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:52:30,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5579 states. [2021-12-17 20:52:30,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5579 to 5577. [2021-12-17 20:52:30,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5577 states, 5575 states have (on average 1.5083408071748878) internal successors, (8409), 5576 states have internal predecessors, (8409), 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) [2021-12-17 20:52:30,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5577 states to 5577 states and 8409 transitions. [2021-12-17 20:52:30,352 INFO L78 Accepts]: Start accepts. Automaton has 5577 states and 8409 transitions. Word has length 66 [2021-12-17 20:52:30,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:52:30,352 INFO L470 AbstractCegarLoop]: Abstraction has 5577 states and 8409 transitions. [2021-12-17 20:52:30,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:52:30,352 INFO L276 IsEmpty]: Start isEmpty. Operand 5577 states and 8409 transitions. [2021-12-17 20:52:30,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-17 20:52:30,353 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:52:30,353 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:52:30,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-17 20:52:30,353 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:52:30,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:52:30,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1643060746, now seen corresponding path program 1 times [2021-12-17 20:52:30,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:52:30,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345353096] [2021-12-17 20:52:30,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:52:30,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:52:30,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:52:30,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:52:30,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:52:30,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345353096] [2021-12-17 20:52:30,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345353096] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:52:30,402 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:52:30,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 20:52:30,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011774738] [2021-12-17 20:52:30,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:52:30,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 20:52:30,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:52:30,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 20:52:30,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 20:52:30,404 INFO L87 Difference]: Start difference. First operand 5577 states and 8409 transitions. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:52:30,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:52:30,570 INFO L93 Difference]: Finished difference Result 8859 states and 13226 transitions. [2021-12-17 20:52:30,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 20:52:30,570 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-12-17 20:52:30,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:52:30,579 INFO L225 Difference]: With dead ends: 8859 [2021-12-17 20:52:30,579 INFO L226 Difference]: Without dead ends: 5577 [2021-12-17 20:52:30,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-17 20:52:30,585 INFO L933 BasicCegarLoop]: 1519 mSDtfsCounter, 4687 mSDsluCounter, 1488 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4687 SdHoareTripleChecker+Valid, 3007 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 20:52:30,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4687 Valid, 3007 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:52:30,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5577 states. [2021-12-17 20:52:30,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5577 to 5577. [2021-12-17 20:52:30,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5577 states, 5575 states have (on average 1.4997309417040359) internal successors, (8361), 5576 states have internal predecessors, (8361), 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) [2021-12-17 20:52:30,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5577 states to 5577 states and 8361 transitions. [2021-12-17 20:52:30,771 INFO L78 Accepts]: Start accepts. Automaton has 5577 states and 8361 transitions. Word has length 67 [2021-12-17 20:52:30,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:52:30,771 INFO L470 AbstractCegarLoop]: Abstraction has 5577 states and 8361 transitions. [2021-12-17 20:52:30,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:52:30,771 INFO L276 IsEmpty]: Start isEmpty. Operand 5577 states and 8361 transitions. [2021-12-17 20:52:30,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-17 20:52:30,772 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:52:30,772 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:52:30,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-17 20:52:30,772 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:52:30,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:52:30,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1372042872, now seen corresponding path program 1 times [2021-12-17 20:52:30,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:52:30,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593503180] [2021-12-17 20:52:30,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:52:30,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:52:30,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:52:30,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:52:30,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:52:30,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593503180] [2021-12-17 20:52:30,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593503180] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:52:30,827 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:52:30,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 20:52:30,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388558632] [2021-12-17 20:52:30,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:52:30,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 20:52:30,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:52:30,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 20:52:30,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 20:52:30,828 INFO L87 Difference]: Start difference. First operand 5577 states and 8361 transitions. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:52:31,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:52:31,002 INFO L93 Difference]: Finished difference Result 8859 states and 13130 transitions. [2021-12-17 20:52:31,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 20:52:31,003 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-12-17 20:52:31,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:52:31,012 INFO L225 Difference]: With dead ends: 8859 [2021-12-17 20:52:31,012 INFO L226 Difference]: Without dead ends: 5577 [2021-12-17 20:52:31,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-17 20:52:31,017 INFO L933 BasicCegarLoop]: 1521 mSDtfsCounter, 4660 mSDsluCounter, 1502 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4660 SdHoareTripleChecker+Valid, 3023 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 20:52:31,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4660 Valid, 3023 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:52:31,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5577 states. [2021-12-17 20:52:31,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5577 to 5577. [2021-12-17 20:52:31,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5577 states, 5575 states have (on average 1.491121076233184) internal successors, (8313), 5576 states have internal predecessors, (8313), 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) [2021-12-17 20:52:31,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5577 states to 5577 states and 8313 transitions. [2021-12-17 20:52:31,159 INFO L78 Accepts]: Start accepts. Automaton has 5577 states and 8313 transitions. Word has length 67 [2021-12-17 20:52:31,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:52:31,159 INFO L470 AbstractCegarLoop]: Abstraction has 5577 states and 8313 transitions. [2021-12-17 20:52:31,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:52:31,160 INFO L276 IsEmpty]: Start isEmpty. Operand 5577 states and 8313 transitions. [2021-12-17 20:52:31,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-17 20:52:31,160 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:52:31,160 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:52:31,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-17 20:52:31,161 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:52:31,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:52:31,161 INFO L85 PathProgramCache]: Analyzing trace with hash 316900870, now seen corresponding path program 1 times [2021-12-17 20:52:31,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:52:31,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610554810] [2021-12-17 20:52:31,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:52:31,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:52:31,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:52:31,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:52:31,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:52:31,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610554810] [2021-12-17 20:52:31,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610554810] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:52:31,218 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:52:31,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 20:52:31,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511640973] [2021-12-17 20:52:31,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:52:31,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 20:52:31,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:52:31,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 20:52:31,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 20:52:31,220 INFO L87 Difference]: Start difference. First operand 5577 states and 8313 transitions. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:52:31,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:52:31,542 INFO L93 Difference]: Finished difference Result 8420 states and 12287 transitions. [2021-12-17 20:52:31,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 20:52:31,542 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-12-17 20:52:31,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:52:31,554 INFO L225 Difference]: With dead ends: 8420 [2021-12-17 20:52:31,554 INFO L226 Difference]: Without dead ends: 8418 [2021-12-17 20:52:31,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-12-17 20:52:31,557 INFO L933 BasicCegarLoop]: 1578 mSDtfsCounter, 616 mSDsluCounter, 9065 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 616 SdHoareTripleChecker+Valid, 10643 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 20:52:31,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [616 Valid, 10643 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:52:31,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8418 states. [2021-12-17 20:52:31,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8418 to 5769. [2021-12-17 20:52:31,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5769 states, 5767 states have (on average 1.4719958383908445) internal successors, (8489), 5768 states have internal predecessors, (8489), 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) [2021-12-17 20:52:31,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5769 states to 5769 states and 8489 transitions. [2021-12-17 20:52:31,732 INFO L78 Accepts]: Start accepts. Automaton has 5769 states and 8489 transitions. Word has length 67 [2021-12-17 20:52:31,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:52:31,732 INFO L470 AbstractCegarLoop]: Abstraction has 5769 states and 8489 transitions. [2021-12-17 20:52:31,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:52:31,733 INFO L276 IsEmpty]: Start isEmpty. Operand 5769 states and 8489 transitions. [2021-12-17 20:52:31,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-17 20:52:31,735 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:52:31,735 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:52:31,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-17 20:52:31,736 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:52:31,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:52:31,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1065285143, now seen corresponding path program 1 times [2021-12-17 20:52:31,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:52:31,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657580548] [2021-12-17 20:52:31,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:52:31,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:52:31,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:52:31,786 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-17 20:52:31,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:52:31,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657580548] [2021-12-17 20:52:31,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657580548] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:52:31,787 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:52:31,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 20:52:31,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587225576] [2021-12-17 20:52:31,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:52:31,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 20:52:31,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:52:31,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 20:52:31,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 20:52:31,788 INFO L87 Difference]: Start difference. First operand 5769 states and 8489 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 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) [2021-12-17 20:52:32,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:52:32,441 INFO L93 Difference]: Finished difference Result 23845 states and 33919 transitions. [2021-12-17 20:52:32,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 20:52:32,441 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 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 95 [2021-12-17 20:52:32,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:52:32,474 INFO L225 Difference]: With dead ends: 23845 [2021-12-17 20:52:32,475 INFO L226 Difference]: Without dead ends: 20371 [2021-12-17 20:52:32,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-17 20:52:32,485 INFO L933 BasicCegarLoop]: 1626 mSDtfsCounter, 6581 mSDsluCounter, 1908 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6581 SdHoareTripleChecker+Valid, 3534 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 20:52:32,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6581 Valid, 3534 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:52:32,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20371 states. [2021-12-17 20:52:32,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20371 to 9241. [2021-12-17 20:52:32,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9241 states, 9239 states have (on average 1.443554497239961) internal successors, (13337), 9240 states have internal predecessors, (13337), 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) [2021-12-17 20:52:32,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9241 states to 9241 states and 13337 transitions. [2021-12-17 20:52:32,910 INFO L78 Accepts]: Start accepts. Automaton has 9241 states and 13337 transitions. Word has length 95 [2021-12-17 20:52:32,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:52:32,910 INFO L470 AbstractCegarLoop]: Abstraction has 9241 states and 13337 transitions. [2021-12-17 20:52:32,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 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) [2021-12-17 20:52:32,910 INFO L276 IsEmpty]: Start isEmpty. Operand 9241 states and 13337 transitions. [2021-12-17 20:52:32,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-17 20:52:32,913 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:52:32,913 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:52:32,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-17 20:52:32,914 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:52:32,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:52:32,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1460899337, now seen corresponding path program 1 times [2021-12-17 20:52:32,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:52:32,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373894178] [2021-12-17 20:52:32,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:52:32,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:52:32,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:52:32,970 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-17 20:52:32,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:52:32,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373894178] [2021-12-17 20:52:32,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373894178] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:52:32,972 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:52:32,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 20:52:32,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179096032] [2021-12-17 20:52:32,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:52:32,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 20:52:32,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:52:32,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 20:52:32,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 20:52:32,974 INFO L87 Difference]: Start difference. First operand 9241 states and 13337 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 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) [2021-12-17 20:52:33,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:52:33,917 INFO L93 Difference]: Finished difference Result 27317 states and 38767 transitions. [2021-12-17 20:52:33,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 20:52:33,917 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 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 95 [2021-12-17 20:52:33,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:52:33,958 INFO L225 Difference]: With dead ends: 27317 [2021-12-17 20:52:33,958 INFO L226 Difference]: Without dead ends: 23843 [2021-12-17 20:52:33,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-17 20:52:33,967 INFO L933 BasicCegarLoop]: 1626 mSDtfsCounter, 6480 mSDsluCounter, 1956 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6480 SdHoareTripleChecker+Valid, 3582 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 20:52:33,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6480 Valid, 3582 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:52:33,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23843 states. [2021-12-17 20:52:34,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23843 to 14457. [2021-12-17 20:52:34,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14457 states, 14455 states have (on average 1.4229678312002767) internal successors, (20569), 14456 states have internal predecessors, (20569), 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) [2021-12-17 20:52:34,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14457 states to 14457 states and 20569 transitions. [2021-12-17 20:52:34,536 INFO L78 Accepts]: Start accepts. Automaton has 14457 states and 20569 transitions. Word has length 95 [2021-12-17 20:52:34,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:52:34,537 INFO L470 AbstractCegarLoop]: Abstraction has 14457 states and 20569 transitions. [2021-12-17 20:52:34,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 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) [2021-12-17 20:52:34,537 INFO L276 IsEmpty]: Start isEmpty. Operand 14457 states and 20569 transitions. [2021-12-17 20:52:34,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-17 20:52:34,541 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:52:34,541 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:52:34,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-17 20:52:34,541 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:52:34,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:52:34,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1702428119, now seen corresponding path program 1 times [2021-12-17 20:52:34,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:52:34,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944240051] [2021-12-17 20:52:34,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:52:34,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:52:34,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:52:34,595 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 20:52:34,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:52:34,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944240051] [2021-12-17 20:52:34,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944240051] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:52:34,596 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:52:34,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 20:52:34,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339671467] [2021-12-17 20:52:34,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:52:34,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 20:52:34,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:52:34,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 20:52:34,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 20:52:34,597 INFO L87 Difference]: Start difference. First operand 14457 states and 20569 transitions. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 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) [2021-12-17 20:52:35,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:52:35,581 INFO L93 Difference]: Finished difference Result 30789 states and 43615 transitions. [2021-12-17 20:52:35,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 20:52:35,582 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 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 95 [2021-12-17 20:52:35,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:52:35,630 INFO L225 Difference]: With dead ends: 30789 [2021-12-17 20:52:35,631 INFO L226 Difference]: Without dead ends: 27315 [2021-12-17 20:52:35,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-17 20:52:35,644 INFO L933 BasicCegarLoop]: 1626 mSDtfsCounter, 6492 mSDsluCounter, 2000 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6492 SdHoareTripleChecker+Valid, 3626 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 20:52:35,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6492 Valid, 3626 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 20:52:35,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27315 states. [2021-12-17 20:52:36,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27315 to 17929. [2021-12-17 20:52:36,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17929 states, 17927 states have (on average 1.417805544709098) internal successors, (25417), 17928 states have internal predecessors, (25417), 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) [2021-12-17 20:52:36,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17929 states to 17929 states and 25417 transitions. [2021-12-17 20:52:36,451 INFO L78 Accepts]: Start accepts. Automaton has 17929 states and 25417 transitions. Word has length 95 [2021-12-17 20:52:36,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:52:36,451 INFO L470 AbstractCegarLoop]: Abstraction has 17929 states and 25417 transitions. [2021-12-17 20:52:36,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 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) [2021-12-17 20:52:36,452 INFO L276 IsEmpty]: Start isEmpty. Operand 17929 states and 25417 transitions. [2021-12-17 20:52:36,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-17 20:52:36,456 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:52:36,456 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:52:36,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-17 20:52:36,456 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:52:36,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:52:36,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1357080137, now seen corresponding path program 1 times [2021-12-17 20:52:36,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:52:36,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071913159] [2021-12-17 20:52:36,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:52:36,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:52:36,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:52:36,502 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 20:52:36,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:52:36,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071913159] [2021-12-17 20:52:36,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071913159] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:52:36,503 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:52:36,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 20:52:36,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886163050] [2021-12-17 20:52:36,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:52:36,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 20:52:36,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:52:36,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 20:52:36,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 20:52:36,505 INFO L87 Difference]: Start difference. First operand 17929 states and 25417 transitions. Second operand has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 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) [2021-12-17 20:52:37,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:52:37,869 INFO L93 Difference]: Finished difference Result 34261 states and 48463 transitions. [2021-12-17 20:52:37,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 20:52:37,869 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 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 95 [2021-12-17 20:52:37,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:52:37,975 INFO L225 Difference]: With dead ends: 34261 [2021-12-17 20:52:37,975 INFO L226 Difference]: Without dead ends: 30787 [2021-12-17 20:52:37,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-17 20:52:37,983 INFO L933 BasicCegarLoop]: 1627 mSDtfsCounter, 6560 mSDsluCounter, 2003 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6560 SdHoareTripleChecker+Valid, 3630 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 20:52:37,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6560 Valid, 3630 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:52:37,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30787 states. [2021-12-17 20:52:38,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30787 to 21401. [2021-12-17 20:52:38,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21401 states, 21399 states have (on average 1.4143184260946773) internal successors, (30265), 21400 states have internal predecessors, (30265), 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) [2021-12-17 20:52:38,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21401 states to 21401 states and 30265 transitions. [2021-12-17 20:52:38,894 INFO L78 Accepts]: Start accepts. Automaton has 21401 states and 30265 transitions. Word has length 95 [2021-12-17 20:52:38,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:52:38,894 INFO L470 AbstractCegarLoop]: Abstraction has 21401 states and 30265 transitions. [2021-12-17 20:52:38,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 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) [2021-12-17 20:52:38,895 INFO L276 IsEmpty]: Start isEmpty. Operand 21401 states and 30265 transitions. [2021-12-17 20:52:38,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-17 20:52:38,899 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:52:38,899 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:52:38,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-17 20:52:38,900 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:52:38,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:52:38,900 INFO L85 PathProgramCache]: Analyzing trace with hash -63915415, now seen corresponding path program 1 times [2021-12-17 20:52:38,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:52:38,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219519938] [2021-12-17 20:52:38,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:52:38,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:52:38,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:52:38,944 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 20:52:38,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:52:38,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219519938] [2021-12-17 20:52:38,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219519938] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:52:38,945 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:52:38,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 20:52:38,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309826648] [2021-12-17 20:52:38,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:52:38,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 20:52:38,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:52:38,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 20:52:38,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 20:52:38,947 INFO L87 Difference]: Start difference. First operand 21401 states and 30265 transitions. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 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) [2021-12-17 20:52:40,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:52:40,297 INFO L93 Difference]: Finished difference Result 35653 states and 50431 transitions. [2021-12-17 20:52:40,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 20:52:40,298 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 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 95 [2021-12-17 20:52:40,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:52:40,342 INFO L225 Difference]: With dead ends: 35653 [2021-12-17 20:52:40,342 INFO L226 Difference]: Without dead ends: 33219 [2021-12-17 20:52:40,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-17 20:52:40,356 INFO L933 BasicCegarLoop]: 1624 mSDtfsCounter, 6561 mSDsluCounter, 1919 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6561 SdHoareTripleChecker+Valid, 3543 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 20:52:40,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6561 Valid, 3543 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:52:40,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33219 states. [2021-12-17 20:52:41,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33219 to 23833. [2021-12-17 20:52:41,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23833 states, 23831 states have (on average 1.4136628760857706) internal successors, (33689), 23832 states have internal predecessors, (33689), 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) [2021-12-17 20:52:41,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23833 states to 23833 states and 33689 transitions. [2021-12-17 20:52:41,516 INFO L78 Accepts]: Start accepts. Automaton has 23833 states and 33689 transitions. Word has length 95 [2021-12-17 20:52:41,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:52:41,516 INFO L470 AbstractCegarLoop]: Abstraction has 23833 states and 33689 transitions. [2021-12-17 20:52:41,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 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) [2021-12-17 20:52:41,516 INFO L276 IsEmpty]: Start isEmpty. Operand 23833 states and 33689 transitions. [2021-12-17 20:52:41,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-17 20:52:41,523 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:52:41,523 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:52:41,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-17 20:52:41,524 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:52:41,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:52:41,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1416628636, now seen corresponding path program 1 times [2021-12-17 20:52:41,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:52:41,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866350782] [2021-12-17 20:52:41,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:52:41,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:52:41,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:52:41,695 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:52:41,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:52:41,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866350782] [2021-12-17 20:52:41,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866350782] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 20:52:41,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539602856] [2021-12-17 20:52:41,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:52:41,696 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 20:52:41,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 20:52:41,697 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) [2021-12-17 20:52:41,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 20:52:41,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:52:41,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-17 20:52:41,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 20:52:42,106 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:52:42,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 20:52:42,652 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:52:42,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539602856] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 20:52:42,653 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 20:52:42,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 6] total 23 [2021-12-17 20:52:42,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514625527] [2021-12-17 20:52:42,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 20:52:42,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-17 20:52:42,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:52:42,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-17 20:52:42,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-12-17 20:52:42,655 INFO L87 Difference]: Start difference. First operand 23833 states and 33689 transitions. Second operand has 23 states, 23 states have (on average 11.956521739130435) internal successors, (275), 23 states have internal predecessors, (275), 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) [2021-12-17 20:53:04,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:53:04,150 INFO L93 Difference]: Finished difference Result 299379 states and 415318 transitions. [2021-12-17 20:53:04,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 210 states. [2021-12-17 20:53:04,151 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 11.956521739130435) internal successors, (275), 23 states have internal predecessors, (275), 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 96 [2021-12-17 20:53:04,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:53:04,764 INFO L225 Difference]: With dead ends: 299379 [2021-12-17 20:53:04,764 INFO L226 Difference]: Without dead ends: 275685 [2021-12-17 20:53:04,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 228 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23345 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=7066, Invalid=45604, Unknown=0, NotChecked=0, Total=52670 [2021-12-17 20:53:04,863 INFO L933 BasicCegarLoop]: 1763 mSDtfsCounter, 17646 mSDsluCounter, 11565 mSDsCounter, 0 mSdLazyCounter, 4792 mSolverCounterSat, 564 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17646 SdHoareTripleChecker+Valid, 13328 SdHoareTripleChecker+Invalid, 5356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 564 IncrementalHoareTripleChecker+Valid, 4792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-17 20:53:04,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17646 Valid, 13328 Invalid, 5356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [564 Valid, 4792 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-17 20:53:05,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275685 states. [2021-12-17 20:53:15,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275685 to 173513. [2021-12-17 20:53:15,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173513 states, 173511 states have (on average 1.3763565422365152) internal successors, (238813), 173512 states have internal predecessors, (238813), 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) [2021-12-17 20:53:16,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173513 states to 173513 states and 238813 transitions. [2021-12-17 20:53:16,491 INFO L78 Accepts]: Start accepts. Automaton has 173513 states and 238813 transitions. Word has length 96 [2021-12-17 20:53:16,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:53:16,492 INFO L470 AbstractCegarLoop]: Abstraction has 173513 states and 238813 transitions. [2021-12-17 20:53:16,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 11.956521739130435) internal successors, (275), 23 states have internal predecessors, (275), 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) [2021-12-17 20:53:16,492 INFO L276 IsEmpty]: Start isEmpty. Operand 173513 states and 238813 transitions. [2021-12-17 20:53:16,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-17 20:53:16,498 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:53:16,499 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-17 20:53:16,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 20:53:16,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 20:53:16,716 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:53:16,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:53:16,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1408959169, now seen corresponding path program 1 times [2021-12-17 20:53:16,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:53:16,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351937063] [2021-12-17 20:53:16,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:53:16,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:53:16,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:53:16,839 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:53:16,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:53:16,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351937063] [2021-12-17 20:53:16,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351937063] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 20:53:16,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728965091] [2021-12-17 20:53:16,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:53:16,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 20:53:16,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 20:53:16,842 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) [2021-12-17 20:53:16,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 20:53:16,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:53:16,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-17 20:53:16,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 20:53:17,509 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:53:17,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 20:53:18,426 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:53:18,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728965091] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 20:53:18,427 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 20:53:18,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2021-12-17 20:53:18,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933255273] [2021-12-17 20:53:18,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 20:53:18,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-17 20:53:18,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:53:18,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-17 20:53:18,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-12-17 20:53:18,430 INFO L87 Difference]: Start difference. First operand 173513 states and 238813 transitions. Second operand has 23 states, 23 states have (on average 9.782608695652174) internal successors, (225), 22 states have internal predecessors, (225), 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)