./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem03_label42.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/eca-rers2012/Problem03_label42.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 43b1e2ddb5478e4d8ee38477d15f5851a49b7cf223d0a089a3fdb9014fd7706f --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-15 22:07:21,895 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 22:07:21,897 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 22:07:21,936 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 22:07:21,936 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 22:07:21,938 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 22:07:21,940 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 22:07:21,942 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 22:07:21,943 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 22:07:21,946 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 22:07:21,947 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 22:07:21,948 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 22:07:21,948 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 22:07:21,950 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 22:07:21,951 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 22:07:21,953 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 22:07:21,953 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 22:07:21,954 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 22:07:21,955 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 22:07:21,959 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 22:07:21,960 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 22:07:21,961 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 22:07:21,962 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 22:07:21,963 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 22:07:21,968 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 22:07:21,969 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 22:07:21,969 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 22:07:21,970 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 22:07:21,970 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 22:07:21,971 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 22:07:21,971 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 22:07:21,972 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 22:07:21,973 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 22:07:21,974 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 22:07:21,975 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 22:07:21,975 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 22:07:21,975 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 22:07:21,975 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 22:07:21,976 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 22:07:21,976 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 22:07:21,977 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 22:07:21,978 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 22:07:22,015 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 22:07:22,016 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 22:07:22,016 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 22:07:22,016 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 22:07:22,017 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 22:07:22,017 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 22:07:22,017 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 22:07:22,018 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 22:07:22,018 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 22:07:22,027 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 22:07:22,027 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 22:07:22,027 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 22:07:22,028 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 22:07:22,028 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 22:07:22,028 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 22:07:22,028 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 22:07:22,028 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 22:07:22,028 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 22:07:22,029 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 22:07:22,029 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 22:07:22,029 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 22:07:22,029 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 22:07:22,029 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 22:07:22,029 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 22:07:22,029 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 22:07:22,030 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 22:07:22,030 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 22:07:22,030 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 22:07:22,030 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 22:07:22,030 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 22:07:22,030 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 22:07:22,031 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 22:07:22,031 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 22:07:22,031 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 22:07:22,031 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 43b1e2ddb5478e4d8ee38477d15f5851a49b7cf223d0a089a3fdb9014fd7706f [2021-12-15 22:07:22,204 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 22:07:22,225 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 22:07:22,226 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 22:07:22,227 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 22:07:22,228 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 22:07:22,229 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label42.c [2021-12-15 22:07:22,283 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0b7c7f82/bb8e0a2b2c34426fabbb24801a406d71/FLAGbc26af861 [2021-12-15 22:07:22,862 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 22:07:22,862 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label42.c [2021-12-15 22:07:22,879 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0b7c7f82/bb8e0a2b2c34426fabbb24801a406d71/FLAGbc26af861 [2021-12-15 22:07:23,279 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0b7c7f82/bb8e0a2b2c34426fabbb24801a406d71 [2021-12-15 22:07:23,281 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 22:07:23,284 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 22:07:23,292 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 22:07:23,293 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 22:07:23,297 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 22:07:23,297 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:07:23" (1/1) ... [2021-12-15 22:07:23,307 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f3151a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:07:23, skipping insertion in model container [2021-12-15 22:07:23,307 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:07:23" (1/1) ... [2021-12-15 22:07:23,312 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 22:07:23,433 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 22:07:23,989 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label42.c[60691,60704] [2021-12-15 22:07:24,017 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 22:07:24,025 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 22:07:24,227 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label42.c[60691,60704] [2021-12-15 22:07:24,233 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 22:07:24,246 INFO L208 MainTranslator]: Completed translation [2021-12-15 22:07:24,246 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:07:24 WrapperNode [2021-12-15 22:07:24,246 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 22:07:24,247 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 22:07:24,247 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 22:07:24,247 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 22:07:24,253 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:07:24" (1/1) ... [2021-12-15 22:07:24,290 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:07:24" (1/1) ... [2021-12-15 22:07:24,368 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2021-12-15 22:07:24,369 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 22:07:24,370 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 22:07:24,370 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 22:07:24,370 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 22:07:24,377 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:07:24" (1/1) ... [2021-12-15 22:07:24,377 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:07:24" (1/1) ... [2021-12-15 22:07:24,385 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:07:24" (1/1) ... [2021-12-15 22:07:24,385 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:07:24" (1/1) ... [2021-12-15 22:07:24,484 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:07:24" (1/1) ... [2021-12-15 22:07:24,500 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:07:24" (1/1) ... [2021-12-15 22:07:24,507 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:07:24" (1/1) ... [2021-12-15 22:07:24,523 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 22:07:24,523 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 22:07:24,523 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 22:07:24,523 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 22:07:24,544 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:07:24" (1/1) ... [2021-12-15 22:07:24,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 22:07:24,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:07:24,604 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) [2021-12-15 22:07:24,643 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 [2021-12-15 22:07:24,670 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 22:07:24,670 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 22:07:24,670 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 22:07:24,670 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 22:07:24,782 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 22:07:24,784 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 22:07:26,508 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 22:07:26,521 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 22:07:26,522 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 22:07:26,524 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:07:26 BoogieIcfgContainer [2021-12-15 22:07:26,524 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 22:07:26,525 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 22:07:26,530 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 22:07:26,533 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 22:07:26,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 10:07:23" (1/3) ... [2021-12-15 22:07:26,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e662c36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:07:26, skipping insertion in model container [2021-12-15 22:07:26,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:07:24" (2/3) ... [2021-12-15 22:07:26,534 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e662c36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:07:26, skipping insertion in model container [2021-12-15 22:07:26,547 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:07:26" (3/3) ... [2021-12-15 22:07:26,549 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label42.c [2021-12-15 22:07:26,552 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 22:07:26,552 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 22:07:26,617 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 22:07:26,623 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 [2021-12-15 22:07:26,623 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 22:07:26,672 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:07:26,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-12-15 22:07:26,707 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:07:26,707 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:07:26,708 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:07:26,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:07:26,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1065786898, now seen corresponding path program 1 times [2021-12-15 22:07:26,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:07:26,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134597216] [2021-12-15 22:07:26,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:07:26,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:07:27,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:07:27,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:07:27,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:07:27,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134597216] [2021-12-15 22:07:27,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134597216] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:07:27,523 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:07:27,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:07:27,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399973731] [2021-12-15 22:07:27,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:07:27,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:07:27,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:07:27,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:07:27,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:07:27,549 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 2 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:07:28,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:07:28,792 INFO L93 Difference]: Finished difference Result 855 states and 1496 transitions. [2021-12-15 22:07:28,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:07:28,795 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 2 states have internal predecessors, (196), 0 states have call successors, (0), 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 196 [2021-12-15 22:07:28,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:07:28,815 INFO L225 Difference]: With dead ends: 855 [2021-12-15 22:07:28,815 INFO L226 Difference]: Without dead ends: 460 [2021-12-15 22:07:28,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:07:28,828 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 100 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-15 22:07:28,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 176 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 713 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-15 22:07:28,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-12-15 22:07:28,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 459. [2021-12-15 22:07:28,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 1.5502183406113537) internal successors, (710), 458 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:07:28,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 710 transitions. [2021-12-15 22:07:28,913 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 710 transitions. Word has length 196 [2021-12-15 22:07:28,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:07:28,914 INFO L470 AbstractCegarLoop]: Abstraction has 459 states and 710 transitions. [2021-12-15 22:07:28,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 2 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:07:28,915 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 710 transitions. [2021-12-15 22:07:28,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-12-15 22:07:28,918 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:07:28,918 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:07:28,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 22:07:28,919 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:07:28,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:07:28,920 INFO L85 PathProgramCache]: Analyzing trace with hash -32063774, now seen corresponding path program 1 times [2021-12-15 22:07:28,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:07:28,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701256424] [2021-12-15 22:07:28,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:07:28,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:07:28,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:07:28,994 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:07:28,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:07:28,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701256424] [2021-12-15 22:07:28,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701256424] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:07:28,995 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:07:28,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:07:28,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716017366] [2021-12-15 22:07:28,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:07:29,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:07:29,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:07:29,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:07:29,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:07:29,009 INFO L87 Difference]: Start difference. First operand 459 states and 710 transitions. Second operand has 3 states, 3 states have (on average 67.0) internal successors, (201), 2 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:07:29,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:07:29,802 INFO L93 Difference]: Finished difference Result 1354 states and 2104 transitions. [2021-12-15 22:07:29,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:07:29,804 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 2 states have internal predecessors, (201), 0 states have call successors, (0), 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 201 [2021-12-15 22:07:29,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:07:29,807 INFO L225 Difference]: With dead ends: 1354 [2021-12-15 22:07:29,807 INFO L226 Difference]: Without dead ends: 897 [2021-12-15 22:07:29,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:07:29,829 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 265 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 22:07:29,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 178 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 629 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 22:07:29,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2021-12-15 22:07:29,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 889. [2021-12-15 22:07:29,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 888 states have (on average 1.472972972972973) internal successors, (1308), 888 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:07:29,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 1308 transitions. [2021-12-15 22:07:29,887 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 1308 transitions. Word has length 201 [2021-12-15 22:07:29,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:07:29,889 INFO L470 AbstractCegarLoop]: Abstraction has 889 states and 1308 transitions. [2021-12-15 22:07:29,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 2 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:07:29,890 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 1308 transitions. [2021-12-15 22:07:29,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-12-15 22:07:29,896 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:07:29,897 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:07:29,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 22:07:29,915 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:07:29,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:07:29,916 INFO L85 PathProgramCache]: Analyzing trace with hash -790686671, now seen corresponding path program 1 times [2021-12-15 22:07:29,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:07:29,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879511038] [2021-12-15 22:07:29,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:07:29,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:07:29,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:07:30,078 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:07:30,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:07:30,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879511038] [2021-12-15 22:07:30,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879511038] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:07:30,079 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:07:30,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:07:30,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291254244] [2021-12-15 22:07:30,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:07:30,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:07:30,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:07:30,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:07:30,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:07:30,080 INFO L87 Difference]: Start difference. First operand 889 states and 1308 transitions. Second operand has 3 states, 3 states have (on average 68.0) internal successors, (204), 2 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:07:30,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:07:30,700 INFO L93 Difference]: Finished difference Result 2615 states and 3867 transitions. [2021-12-15 22:07:30,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:07:30,701 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 2 states have internal predecessors, (204), 0 states have call successors, (0), 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 204 [2021-12-15 22:07:30,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:07:30,707 INFO L225 Difference]: With dead ends: 2615 [2021-12-15 22:07:30,707 INFO L226 Difference]: Without dead ends: 1728 [2021-12-15 22:07:30,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:07:30,713 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 247 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 22:07:30,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 91 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 22:07:30,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1728 states. [2021-12-15 22:07:30,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1728 to 1704. [2021-12-15 22:07:30,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1704 states, 1703 states have (on average 1.446858485026424) internal successors, (2464), 1703 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:07:30,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1704 states to 1704 states and 2464 transitions. [2021-12-15 22:07:30,768 INFO L78 Accepts]: Start accepts. Automaton has 1704 states and 2464 transitions. Word has length 204 [2021-12-15 22:07:30,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:07:30,769 INFO L470 AbstractCegarLoop]: Abstraction has 1704 states and 2464 transitions. [2021-12-15 22:07:30,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 2 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:07:30,769 INFO L276 IsEmpty]: Start isEmpty. Operand 1704 states and 2464 transitions. [2021-12-15 22:07:30,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2021-12-15 22:07:30,772 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:07:30,773 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:07:30,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 22:07:30,773 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:07:30,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:07:30,774 INFO L85 PathProgramCache]: Analyzing trace with hash -173894072, now seen corresponding path program 1 times [2021-12-15 22:07:30,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:07:30,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747592114] [2021-12-15 22:07:30,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:07:30,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:07:30,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:07:30,913 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-15 22:07:30,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:07:30,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747592114] [2021-12-15 22:07:30,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747592114] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:07:30,914 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:07:30,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:07:30,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336193635] [2021-12-15 22:07:30,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:07:30,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:07:30,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:07:30,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:07:30,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:07:30,916 INFO L87 Difference]: Start difference. First operand 1704 states and 2464 transitions. Second operand has 3 states, 3 states have (on average 69.0) internal successors, (207), 2 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:07:31,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:07:31,722 INFO L93 Difference]: Finished difference Result 4245 states and 6122 transitions. [2021-12-15 22:07:31,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:07:31,723 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 2 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 211 [2021-12-15 22:07:31,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:07:31,739 INFO L225 Difference]: With dead ends: 4245 [2021-12-15 22:07:31,740 INFO L226 Difference]: Without dead ends: 2543 [2021-12-15 22:07:31,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:07:31,748 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 217 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 721 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 22:07:31,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 179 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 721 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 22:07:31,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2543 states. [2021-12-15 22:07:31,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2543 to 2534. [2021-12-15 22:07:31,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2534 states, 2533 states have (on average 1.4255823134622976) internal successors, (3611), 2533 states have internal predecessors, (3611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:07:31,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2534 states to 2534 states and 3611 transitions. [2021-12-15 22:07:31,794 INFO L78 Accepts]: Start accepts. Automaton has 2534 states and 3611 transitions. Word has length 211 [2021-12-15 22:07:31,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:07:31,795 INFO L470 AbstractCegarLoop]: Abstraction has 2534 states and 3611 transitions. [2021-12-15 22:07:31,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 2 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:07:31,795 INFO L276 IsEmpty]: Start isEmpty. Operand 2534 states and 3611 transitions. [2021-12-15 22:07:31,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-12-15 22:07:31,800 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:07:31,800 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:07:31,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 22:07:31,801 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:07:31,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:07:31,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1594975706, now seen corresponding path program 1 times [2021-12-15 22:07:31,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:07:31,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362282182] [2021-12-15 22:07:31,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:07:31,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:07:31,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:07:31,897 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-15 22:07:31,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:07:31,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362282182] [2021-12-15 22:07:31,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362282182] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:07:31,898 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:07:31,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:07:31,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51245217] [2021-12-15 22:07:31,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:07:31,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:07:31,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:07:31,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:07:31,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:07:31,900 INFO L87 Difference]: Start difference. First operand 2534 states and 3611 transitions. Second operand has 3 states, 3 states have (on average 70.0) internal successors, (210), 2 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:07:32,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:07:32,446 INFO L93 Difference]: Finished difference Result 5032 states and 7174 transitions. [2021-12-15 22:07:32,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:07:32,447 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 2 states have internal predecessors, (210), 0 states have call successors, (0), 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 214 [2021-12-15 22:07:32,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:07:32,456 INFO L225 Difference]: With dead ends: 5032 [2021-12-15 22:07:32,457 INFO L226 Difference]: Without dead ends: 2500 [2021-12-15 22:07:32,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:07:32,476 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 329 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 22:07:32,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 31 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 22:07:32,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2500 states. [2021-12-15 22:07:32,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2500 to 2500. [2021-12-15 22:07:32,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2500 states, 2499 states have (on average 1.39015606242497) internal successors, (3474), 2499 states have internal predecessors, (3474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:07:32,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2500 states to 2500 states and 3474 transitions. [2021-12-15 22:07:32,529 INFO L78 Accepts]: Start accepts. Automaton has 2500 states and 3474 transitions. Word has length 214 [2021-12-15 22:07:32,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:07:32,530 INFO L470 AbstractCegarLoop]: Abstraction has 2500 states and 3474 transitions. [2021-12-15 22:07:32,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 2 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:07:32,530 INFO L276 IsEmpty]: Start isEmpty. Operand 2500 states and 3474 transitions. [2021-12-15 22:07:32,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-12-15 22:07:32,535 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:07:32,535 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:07:32,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 22:07:32,536 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:07:32,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:07:32,536 INFO L85 PathProgramCache]: Analyzing trace with hash -115502888, now seen corresponding path program 1 times [2021-12-15 22:07:32,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:07:32,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118165410] [2021-12-15 22:07:32,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:07:32,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:07:32,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:07:32,589 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-15 22:07:32,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:07:32,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118165410] [2021-12-15 22:07:32,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118165410] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:07:32,590 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:07:32,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:07:32,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001677094] [2021-12-15 22:07:32,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:07:32,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:07:32,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:07:32,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:07:32,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:07:32,592 INFO L87 Difference]: Start difference. First operand 2500 states and 3474 transitions. Second operand has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:07:32,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:07:32,943 INFO L93 Difference]: Finished difference Result 7467 states and 10383 transitions. [2021-12-15 22:07:32,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:07:32,944 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 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 216 [2021-12-15 22:07:32,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:07:32,963 INFO L225 Difference]: With dead ends: 7467 [2021-12-15 22:07:32,963 INFO L226 Difference]: Without dead ends: 4969 [2021-12-15 22:07:32,968 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 [2021-12-15 22:07:32,970 INFO L933 BasicCegarLoop]: 279 mSDtfsCounter, 322 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:07:32,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 528 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-15 22:07:32,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4969 states. [2021-12-15 22:07:33,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4969 to 4963. [2021-12-15 22:07:33,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4963 states, 4962 states have (on average 1.3897621926642483) internal successors, (6896), 4962 states have internal predecessors, (6896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:07:33,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4963 states to 4963 states and 6896 transitions. [2021-12-15 22:07:33,118 INFO L78 Accepts]: Start accepts. Automaton has 4963 states and 6896 transitions. Word has length 216 [2021-12-15 22:07:33,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:07:33,119 INFO L470 AbstractCegarLoop]: Abstraction has 4963 states and 6896 transitions. [2021-12-15 22:07:33,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:07:33,120 INFO L276 IsEmpty]: Start isEmpty. Operand 4963 states and 6896 transitions. [2021-12-15 22:07:33,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-12-15 22:07:33,130 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:07:33,130 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:07:33,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 22:07:33,131 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:07:33,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:07:33,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1543109555, now seen corresponding path program 1 times [2021-12-15 22:07:33,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:07:33,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167095512] [2021-12-15 22:07:33,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:07:33,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:07:33,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:07:33,210 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 28 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:07:33,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:07:33,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167095512] [2021-12-15 22:07:33,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167095512] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:07:33,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638491362] [2021-12-15 22:07:33,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:07:33,211 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:07:33,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:07:33,212 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) [2021-12-15 22:07:33,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 22:07:33,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:07:33,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 22:07:33,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:07:33,722 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 22:07:33,722 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 22:07:33,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638491362] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:07:33,722 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 22:07:33,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-15 22:07:33,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667324730] [2021-12-15 22:07:33,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:07:33,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:07:33,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:07:33,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:07:33,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:07:33,724 INFO L87 Difference]: Start difference. First operand 4963 states and 6896 transitions. Second operand has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:07:34,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:07:34,637 INFO L93 Difference]: Finished difference Result 14800 states and 20563 transitions. [2021-12-15 22:07:34,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:07:34,637 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 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 218 [2021-12-15 22:07:34,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:07:34,662 INFO L225 Difference]: With dead ends: 14800 [2021-12-15 22:07:34,662 INFO L226 Difference]: Without dead ends: 9839 [2021-12-15 22:07:34,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:07:34,669 INFO L933 BasicCegarLoop]: 354 mSDtfsCounter, 210 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 22:07:34,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 376 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 22:07:34,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9839 states. [2021-12-15 22:07:34,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9839 to 9835. [2021-12-15 22:07:34,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9835 states, 9834 states have (on average 1.2434411226357536) internal successors, (12228), 9834 states have internal predecessors, (12228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:07:34,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9835 states to 9835 states and 12228 transitions. [2021-12-15 22:07:34,907 INFO L78 Accepts]: Start accepts. Automaton has 9835 states and 12228 transitions. Word has length 218 [2021-12-15 22:07:34,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:07:34,907 INFO L470 AbstractCegarLoop]: Abstraction has 9835 states and 12228 transitions. [2021-12-15 22:07:34,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:07:34,907 INFO L276 IsEmpty]: Start isEmpty. Operand 9835 states and 12228 transitions. [2021-12-15 22:07:34,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2021-12-15 22:07:34,921 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:07:34,921 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:07:34,940 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-15 22:07:35,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:07:35,137 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:07:35,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:07:35,137 INFO L85 PathProgramCache]: Analyzing trace with hash -312175858, now seen corresponding path program 1 times [2021-12-15 22:07:35,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:07:35,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576312095] [2021-12-15 22:07:35,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:07:35,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:07:35,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:07:35,254 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-15 22:07:35,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:07:35,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576312095] [2021-12-15 22:07:35,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576312095] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:07:35,255 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:07:35,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:07:35,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028700837] [2021-12-15 22:07:35,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:07:35,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:07:35,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:07:35,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:07:35,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:07:35,256 INFO L87 Difference]: Start difference. First operand 9835 states and 12228 transitions. Second operand has 3 states, 3 states have (on average 71.0) internal successors, (213), 2 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:07:36,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:07:36,190 INFO L93 Difference]: Finished difference Result 24540 states and 31220 transitions. [2021-12-15 22:07:36,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:07:36,191 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 2 states have internal predecessors, (213), 0 states have call successors, (0), 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 237 [2021-12-15 22:07:36,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:07:36,240 INFO L225 Difference]: With dead ends: 24540 [2021-12-15 22:07:36,240 INFO L226 Difference]: Without dead ends: 14707 [2021-12-15 22:07:36,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:07:36,256 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 203 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 22:07:36,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 148 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 22:07:36,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14707 states. [2021-12-15 22:07:36,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14707 to 13083. [2021-12-15 22:07:36,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13083 states, 13082 states have (on average 1.2137287876471488) internal successors, (15878), 13082 states have internal predecessors, (15878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:07:36,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13083 states to 13083 states and 15878 transitions. [2021-12-15 22:07:36,670 INFO L78 Accepts]: Start accepts. Automaton has 13083 states and 15878 transitions. Word has length 237 [2021-12-15 22:07:36,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:07:36,670 INFO L470 AbstractCegarLoop]: Abstraction has 13083 states and 15878 transitions. [2021-12-15 22:07:36,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 2 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:07:36,672 INFO L276 IsEmpty]: Start isEmpty. Operand 13083 states and 15878 transitions. [2021-12-15 22:07:36,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2021-12-15 22:07:36,702 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:07:36,702 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:07:36,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 22:07:36,702 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:07:36,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:07:36,703 INFO L85 PathProgramCache]: Analyzing trace with hash -65243625, now seen corresponding path program 1 times [2021-12-15 22:07:36,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:07:36,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510818737] [2021-12-15 22:07:36,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:07:36,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:07:36,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:07:36,804 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 22:07:36,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:07:36,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510818737] [2021-12-15 22:07:36,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510818737] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:07:36,804 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:07:36,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:07:36,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062329791] [2021-12-15 22:07:36,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:07:36,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:07:36,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:07:36,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:07:36,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:07:36,806 INFO L87 Difference]: Start difference. First operand 13083 states and 15878 transitions. Second operand has 4 states, 4 states have (on average 61.75) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:07:37,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:07:37,747 INFO L93 Difference]: Finished difference Result 26179 states and 31784 transitions. [2021-12-15 22:07:37,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:07:37,748 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 61.75) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 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 252 [2021-12-15 22:07:37,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:07:37,767 INFO L225 Difference]: With dead ends: 26179 [2021-12-15 22:07:37,767 INFO L226 Difference]: Without dead ends: 13098 [2021-12-15 22:07:37,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:07:37,774 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 756 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 756 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 22:07:37,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [756 Valid, 44 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 22:07:37,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13098 states. [2021-12-15 22:07:37,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13098 to 11459. [2021-12-15 22:07:37,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11459 states, 11458 states have (on average 1.2195845697329377) internal successors, (13974), 11458 states have internal predecessors, (13974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:07:37,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11459 states to 11459 states and 13974 transitions. [2021-12-15 22:07:37,928 INFO L78 Accepts]: Start accepts. Automaton has 11459 states and 13974 transitions. Word has length 252 [2021-12-15 22:07:37,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:07:37,929 INFO L470 AbstractCegarLoop]: Abstraction has 11459 states and 13974 transitions. [2021-12-15 22:07:37,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 61.75) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:07:37,929 INFO L276 IsEmpty]: Start isEmpty. Operand 11459 states and 13974 transitions. [2021-12-15 22:07:37,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2021-12-15 22:07:37,942 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:07:37,942 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:07:37,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 22:07:37,942 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:07:37,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:07:37,943 INFO L85 PathProgramCache]: Analyzing trace with hash 2048962269, now seen corresponding path program 1 times [2021-12-15 22:07:37,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:07:37,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372239561] [2021-12-15 22:07:37,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:07:37,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:07:38,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:07:38,077 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 74 proven. 6 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-15 22:07:38,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:07:38,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372239561] [2021-12-15 22:07:38,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372239561] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:07:38,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542307358] [2021-12-15 22:07:38,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:07:38,082 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:07:38,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:07:38,093 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) [2021-12-15 22:07:38,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 22:07:38,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:07:38,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 22:07:38,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:07:38,963 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-15 22:07:38,979 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 22:07:38,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542307358] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:07:38,980 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 22:07:38,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-15 22:07:38,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28772504] [2021-12-15 22:07:38,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:07:38,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:07:38,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:07:38,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:07:38,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:07:38,982 INFO L87 Difference]: Start difference. First operand 11459 states and 13974 transitions. Second operand has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:07:39,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:07:39,992 INFO L93 Difference]: Finished difference Result 32668 states and 39804 transitions. [2021-12-15 22:07:39,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:07:39,993 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 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 275 [2021-12-15 22:07:39,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:07:40,068 INFO L225 Difference]: With dead ends: 32668 [2021-12-15 22:07:40,081 INFO L226 Difference]: Without dead ends: 21211 [2021-12-15 22:07:40,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:07:40,096 INFO L933 BasicCegarLoop]: 314 mSDtfsCounter, 46 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-15 22:07:40,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 330 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-15 22:07:40,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21211 states. [2021-12-15 22:07:40,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21211 to 21207. [2021-12-15 22:07:40,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21207 states, 21206 states have (on average 1.1676883900782797) internal successors, (24762), 21206 states have internal predecessors, (24762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:07:40,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21207 states to 21207 states and 24762 transitions. [2021-12-15 22:07:40,563 INFO L78 Accepts]: Start accepts. Automaton has 21207 states and 24762 transitions. Word has length 275 [2021-12-15 22:07:40,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:07:40,564 INFO L470 AbstractCegarLoop]: Abstraction has 21207 states and 24762 transitions. [2021-12-15 22:07:40,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:07:40,565 INFO L276 IsEmpty]: Start isEmpty. Operand 21207 states and 24762 transitions. [2021-12-15 22:07:40,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2021-12-15 22:07:40,629 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:07:40,629 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:07:40,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 22:07:40,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-15 22:07:40,849 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:07:40,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:07:40,849 INFO L85 PathProgramCache]: Analyzing trace with hash 778354812, now seen corresponding path program 1 times [2021-12-15 22:07:40,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:07:40,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852894749] [2021-12-15 22:07:40,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:07:40,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:07:40,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:07:41,112 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-15 22:07:41,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:07:41,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852894749] [2021-12-15 22:07:41,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852894749] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:07:41,113 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:07:41,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:07:41,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801009030] [2021-12-15 22:07:41,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:07:41,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:07:41,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:07:41,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:07:41,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:07:41,120 INFO L87 Difference]: Start difference. First operand 21207 states and 24762 transitions. Second operand has 3 states, 3 states have (on average 91.0) internal successors, (273), 2 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:07:42,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:07:42,152 INFO L93 Difference]: Finished difference Result 46900 states and 54843 transitions. [2021-12-15 22:07:42,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:07:42,153 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.0) internal successors, (273), 2 states have internal predecessors, (273), 0 states have call successors, (0), 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 297 [2021-12-15 22:07:42,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:07:42,186 INFO L225 Difference]: With dead ends: 46900 [2021-12-15 22:07:42,187 INFO L226 Difference]: Without dead ends: 25695 [2021-12-15 22:07:42,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:07:42,198 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 149 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 22:07:42,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 121 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 658 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 22:07:42,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25695 states. [2021-12-15 22:07:42,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25695 to 22425. [2021-12-15 22:07:42,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22425 states, 22424 states have (on average 1.1688815554762755) internal successors, (26211), 22424 states have internal predecessors, (26211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:07:42,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22425 states to 22425 states and 26211 transitions. [2021-12-15 22:07:42,478 INFO L78 Accepts]: Start accepts. Automaton has 22425 states and 26211 transitions. Word has length 297 [2021-12-15 22:07:42,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:07:42,479 INFO L470 AbstractCegarLoop]: Abstraction has 22425 states and 26211 transitions. [2021-12-15 22:07:42,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.0) internal successors, (273), 2 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:07:42,479 INFO L276 IsEmpty]: Start isEmpty. Operand 22425 states and 26211 transitions. [2021-12-15 22:07:42,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2021-12-15 22:07:42,593 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:07:42,593 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:07:42,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 22:07:42,594 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:07:42,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:07:42,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1347507913, now seen corresponding path program 1 times [2021-12-15 22:07:42,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:07:42,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941645351] [2021-12-15 22:07:42,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:07:42,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:07:42,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:07:42,682 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 109 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:07:42,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:07:42,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941645351] [2021-12-15 22:07:42,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941645351] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:07:42,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486313798] [2021-12-15 22:07:42,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:07:42,683 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:07:42,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:07:42,684 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 22:07:42,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 22:07:42,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:07:42,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 22:07:42,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:07:43,338 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-15 22:07:43,339 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 22:07:43,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486313798] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:07:43,339 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 22:07:43,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-15 22:07:43,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506821413] [2021-12-15 22:07:43,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:07:43,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:07:43,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:07:43,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:07:43,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:07:43,341 INFO L87 Difference]: Start difference. First operand 22425 states and 26211 transitions. Second operand has 3 states, 3 states have (on average 98.0) internal successors, (294), 2 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:07:44,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:07:44,043 INFO L93 Difference]: Finished difference Result 62169 states and 72381 transitions. [2021-12-15 22:07:44,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:07:44,044 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 98.0) internal successors, (294), 2 states have internal predecessors, (294), 0 states have call successors, (0), 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 306 [2021-12-15 22:07:44,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:07:44,312 INFO L225 Difference]: With dead ends: 62169 [2021-12-15 22:07:44,312 INFO L226 Difference]: Without dead ends: 40152 [2021-12-15 22:07:44,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 305 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:07:44,325 INFO L933 BasicCegarLoop]: 284 mSDtfsCounter, 238 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 22:07:44,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 550 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 22:07:44,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40152 states. [2021-12-15 22:07:44,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40152 to 40150. [2021-12-15 22:07:44,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40150 states, 40149 states have (on average 1.1590326035517697) internal successors, (46534), 40149 states have internal predecessors, (46534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:07:45,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40150 states to 40150 states and 46534 transitions. [2021-12-15 22:07:45,028 INFO L78 Accepts]: Start accepts. Automaton has 40150 states and 46534 transitions. Word has length 306 [2021-12-15 22:07:45,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:07:45,028 INFO L470 AbstractCegarLoop]: Abstraction has 40150 states and 46534 transitions. [2021-12-15 22:07:45,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.0) internal successors, (294), 2 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:07:45,028 INFO L276 IsEmpty]: Start isEmpty. Operand 40150 states and 46534 transitions. [2021-12-15 22:07:45,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2021-12-15 22:07:45,061 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:07:45,062 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:07:45,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-15 22:07:45,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:07:45,300 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:07:45,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:07:45,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1218711397, now seen corresponding path program 1 times [2021-12-15 22:07:45,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:07:45,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200447033] [2021-12-15 22:07:45,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:07:45,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:07:45,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:07:45,390 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 137 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-15 22:07:45,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:07:45,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200447033] [2021-12-15 22:07:45,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200447033] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:07:45,391 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:07:45,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:07:45,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176785490] [2021-12-15 22:07:45,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:07:45,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:07:45,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:07:45,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:07:45,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:07:45,395 INFO L87 Difference]: Start difference. First operand 40150 states and 46534 transitions. Second operand has 3 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:07:46,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:07:46,238 INFO L93 Difference]: Finished difference Result 78433 states and 90847 transitions. [2021-12-15 22:07:46,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:07:46,251 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 0 states have call successors, (0), 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 314 [2021-12-15 22:07:46,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:07:46,349 INFO L225 Difference]: With dead ends: 78433 [2021-12-15 22:07:46,349 INFO L226 Difference]: Without dead ends: 38691 [2021-12-15 22:07:46,399 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 [2021-12-15 22:07:46,401 INFO L933 BasicCegarLoop]: 307 mSDtfsCounter, 245 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 22:07:46,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 322 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 22:07:46,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38691 states. [2021-12-15 22:07:46,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38691 to 38687. [2021-12-15 22:07:46,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38687 states, 38686 states have (on average 1.1173034172568888) internal successors, (43224), 38686 states have internal predecessors, (43224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:07:46,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38687 states to 38687 states and 43224 transitions. [2021-12-15 22:07:46,984 INFO L78 Accepts]: Start accepts. Automaton has 38687 states and 43224 transitions. Word has length 314 [2021-12-15 22:07:46,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:07:46,985 INFO L470 AbstractCegarLoop]: Abstraction has 38687 states and 43224 transitions. [2021-12-15 22:07:46,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:07:46,985 INFO L276 IsEmpty]: Start isEmpty. Operand 38687 states and 43224 transitions. [2021-12-15 22:07:47,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2021-12-15 22:07:47,024 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:07:47,024 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:07:47,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 22:07:47,024 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:07:47,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:07:47,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1715760606, now seen corresponding path program 1 times [2021-12-15 22:07:47,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:07:47,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225129557] [2021-12-15 22:07:47,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:07:47,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:07:47,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:07:47,278 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 160 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-15 22:07:47,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:07:47,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225129557] [2021-12-15 22:07:47,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225129557] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:07:47,279 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:07:47,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:07:47,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021203458] [2021-12-15 22:07:47,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:07:47,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:07:47,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:07:47,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:07:47,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:07:47,281 INFO L87 Difference]: Start difference. First operand 38687 states and 43224 transitions. Second operand has 4 states, 4 states have (on average 85.0) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:07:48,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:07:48,356 INFO L93 Difference]: Finished difference Result 95298 states and 106466 transitions. [2021-12-15 22:07:48,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:07:48,357 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 85.0) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 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 347 [2021-12-15 22:07:48,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:07:48,437 INFO L225 Difference]: With dead ends: 95298 [2021-12-15 22:07:48,437 INFO L226 Difference]: Without dead ends: 57019 [2021-12-15 22:07:48,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:07:48,468 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 774 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 774 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 22:07:48,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [774 Valid, 49 Invalid, 775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 674 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 22:07:48,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57019 states. [2021-12-15 22:07:49,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57019 to 57015. [2021-12-15 22:07:49,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57015 states, 57014 states have (on average 1.1167607955940646) internal successors, (63671), 57014 states have internal predecessors, (63671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:07:49,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57015 states to 57015 states and 63671 transitions. [2021-12-15 22:07:49,498 INFO L78 Accepts]: Start accepts. Automaton has 57015 states and 63671 transitions. Word has length 347 [2021-12-15 22:07:49,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:07:49,499 INFO L470 AbstractCegarLoop]: Abstraction has 57015 states and 63671 transitions. [2021-12-15 22:07:49,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 85.0) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:07:49,499 INFO L276 IsEmpty]: Start isEmpty. Operand 57015 states and 63671 transitions. [2021-12-15 22:07:49,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2021-12-15 22:07:49,558 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:07:49,558 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:07:49,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-15 22:07:49,560 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:07:49,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:07:49,560 INFO L85 PathProgramCache]: Analyzing trace with hash 616723612, now seen corresponding path program 1 times [2021-12-15 22:07:49,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:07:49,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493022725] [2021-12-15 22:07:49,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:07:49,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:07:49,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:07:49,798 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 167 proven. 6 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2021-12-15 22:07:49,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:07:49,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493022725] [2021-12-15 22:07:49,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493022725] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:07:49,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293893975] [2021-12-15 22:07:49,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:07:49,799 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:07:49,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:07:49,800 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 22:07:49,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 22:07:50,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:07:50,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 816 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 22:07:50,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:07:50,745 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 227 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-12-15 22:07:50,745 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 22:07:50,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293893975] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:07:50,745 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 22:07:50,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-15 22:07:50,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191204035] [2021-12-15 22:07:50,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:07:50,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:07:50,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:07:50,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:07:50,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:07:50,746 INFO L87 Difference]: Start difference. First operand 57015 states and 63671 transitions. Second operand has 3 states, 3 states have (on average 94.0) internal successors, (282), 3 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:07:51,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:07:51,584 INFO L93 Difference]: Finished difference Result 167780 states and 187254 transitions. [2021-12-15 22:07:51,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:07:51,585 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 94.0) internal successors, (282), 3 states have internal predecessors, (282), 0 states have call successors, (0), 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 388 [2021-12-15 22:07:51,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:07:51,765 INFO L225 Difference]: With dead ends: 167780 [2021-12-15 22:07:51,766 INFO L226 Difference]: Without dead ends: 111173 [2021-12-15 22:07:51,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 387 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:07:51,820 INFO L933 BasicCegarLoop]: 280 mSDtfsCounter, 259 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 22:07:51,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 544 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 22:07:51,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111173 states. [2021-12-15 22:07:53,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111173 to 111163. [2021-12-15 22:07:53,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111163 states, 111162 states have (on average 1.1152102337129595) internal successors, (123969), 111162 states have internal predecessors, (123969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:07:53,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111163 states to 111163 states and 123969 transitions. [2021-12-15 22:07:53,962 INFO L78 Accepts]: Start accepts. Automaton has 111163 states and 123969 transitions. Word has length 388 [2021-12-15 22:07:53,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:07:53,962 INFO L470 AbstractCegarLoop]: Abstraction has 111163 states and 123969 transitions. [2021-12-15 22:07:53,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.0) internal successors, (282), 3 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:07:53,963 INFO L276 IsEmpty]: Start isEmpty. Operand 111163 states and 123969 transitions. [2021-12-15 22:07:54,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2021-12-15 22:07:54,059 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:07:54,060 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:07:54,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-15 22:07:54,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-15 22:07:54,274 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:07:54,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:07:54,274 INFO L85 PathProgramCache]: Analyzing trace with hash 386137414, now seen corresponding path program 1 times [2021-12-15 22:07:54,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:07:54,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067089503] [2021-12-15 22:07:54,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:07:54,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:07:54,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:07:54,506 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 78 proven. 12 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2021-12-15 22:07:54,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:07:54,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067089503] [2021-12-15 22:07:54,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067089503] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:07:54,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329448574] [2021-12-15 22:07:54,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:07:54,508 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:07:54,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:07:54,509 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 22:07:54,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-15 22:07:54,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:07:54,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 760 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 22:07:54,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:07:55,425 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 198 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-12-15 22:07:55,425 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 22:07:55,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329448574] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:07:55,426 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 22:07:55,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-15 22:07:55,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167387319] [2021-12-15 22:07:55,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:07:55,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:07:55,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:07:55,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:07:55,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:07:55,428 INFO L87 Difference]: Start difference. First operand 111163 states and 123969 transitions. Second operand has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:07:57,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:07:57,060 INFO L93 Difference]: Finished difference Result 316508 states and 353669 transitions. [2021-12-15 22:07:57,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:07:57,060 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 states have internal predecessors, (274), 0 states have call successors, (0), 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 419 [2021-12-15 22:07:57,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:07:57,549 INFO L225 Difference]: With dead ends: 316508 [2021-12-15 22:07:57,550 INFO L226 Difference]: Without dead ends: 205753 [2021-12-15 22:07:57,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 418 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:07:57,625 INFO L933 BasicCegarLoop]: 564 mSDtfsCounter, 235 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 790 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:07:57,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 790 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-15 22:07:57,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205753 states. [2021-12-15 22:07:59,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205753 to 205743. [2021-12-15 22:08:00,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205743 states, 205742 states have (on average 1.1064439929620593) internal successors, (227642), 205742 states have internal predecessors, (227642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:00,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205743 states to 205743 states and 227642 transitions. [2021-12-15 22:08:00,737 INFO L78 Accepts]: Start accepts. Automaton has 205743 states and 227642 transitions. Word has length 419 [2021-12-15 22:08:00,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:08:00,737 INFO L470 AbstractCegarLoop]: Abstraction has 205743 states and 227642 transitions. [2021-12-15 22:08:00,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:00,737 INFO L276 IsEmpty]: Start isEmpty. Operand 205743 states and 227642 transitions. [2021-12-15 22:08:00,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2021-12-15 22:08:00,911 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:08:00,912 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:08:00,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-15 22:08:01,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-15 22:08:01,133 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:08:01,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:08:01,134 INFO L85 PathProgramCache]: Analyzing trace with hash 316644986, now seen corresponding path program 1 times [2021-12-15 22:08:01,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:08:01,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357690724] [2021-12-15 22:08:01,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:01,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:08:01,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:01,524 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 60 proven. 130 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-12-15 22:08:01,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:08:01,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357690724] [2021-12-15 22:08:01,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357690724] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:08:01,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758227489] [2021-12-15 22:08:01,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:01,525 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:08:01,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:08:01,540 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 22:08:01,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-15 22:08:01,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:01,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 22:08:01,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:08:02,393 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 190 proven. 0 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-12-15 22:08:02,394 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 22:08:02,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758227489] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:08:02,394 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 22:08:02,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-15 22:08:02,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996043664] [2021-12-15 22:08:02,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:08:02,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:08:02,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:08:02,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:08:02,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-15 22:08:02,396 INFO L87 Difference]: Start difference. First operand 205743 states and 227642 transitions. Second operand has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:04,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:08:04,390 INFO L93 Difference]: Finished difference Result 409872 states and 453388 transitions. [2021-12-15 22:08:04,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:08:04,391 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 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 423 [2021-12-15 22:08:04,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:08:04,897 INFO L225 Difference]: With dead ends: 409872 [2021-12-15 22:08:04,897 INFO L226 Difference]: Without dead ends: 204537 [2021-12-15 22:08:05,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 423 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-15 22:08:05,088 INFO L933 BasicCegarLoop]: 282 mSDtfsCounter, 68 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 22:08:05,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 291 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 22:08:05,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204537 states. [2021-12-15 22:08:07,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204537 to 204501. [2021-12-15 22:08:08,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204501 states, 204500 states have (on average 1.1010513447432764) internal successors, (225165), 204500 states have internal predecessors, (225165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:08,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204501 states to 204501 states and 225165 transitions. [2021-12-15 22:08:08,686 INFO L78 Accepts]: Start accepts. Automaton has 204501 states and 225165 transitions. Word has length 423 [2021-12-15 22:08:08,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:08:08,687 INFO L470 AbstractCegarLoop]: Abstraction has 204501 states and 225165 transitions. [2021-12-15 22:08:08,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:08,687 INFO L276 IsEmpty]: Start isEmpty. Operand 204501 states and 225165 transitions. [2021-12-15 22:08:08,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 441 [2021-12-15 22:08:08,831 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:08:08,831 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:08:08,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-15 22:08:09,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-15 22:08:09,051 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:08:09,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:08:09,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1524955370, now seen corresponding path program 1 times [2021-12-15 22:08:09,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:08:09,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510077914] [2021-12-15 22:08:09,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:09,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:08:09,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:09,181 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 152 proven. 6 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2021-12-15 22:08:09,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:08:09,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510077914] [2021-12-15 22:08:09,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510077914] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:08:09,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421939837] [2021-12-15 22:08:09,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:09,182 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:08:09,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:08:09,189 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 22:08:09,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-15 22:08:09,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:09,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 824 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 22:08:09,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:08:09,954 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 266 proven. 0 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2021-12-15 22:08:09,954 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 22:08:09,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421939837] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:08:09,954 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 22:08:09,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-15 22:08:09,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910140031] [2021-12-15 22:08:09,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:08:09,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:08:09,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:08:09,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:08:09,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:08:09,956 INFO L87 Difference]: Start difference. First operand 204501 states and 225165 transitions. Second operand has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:12,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:08:12,686 INFO L93 Difference]: Finished difference Result 485160 states and 533579 transitions. [2021-12-15 22:08:12,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:08:12,686 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 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 440 [2021-12-15 22:08:12,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:08:12,687 INFO L225 Difference]: With dead ends: 485160 [2021-12-15 22:08:12,687 INFO L226 Difference]: Without dead ends: 0 [2021-12-15 22:08:12,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 439 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:08:12,812 INFO L933 BasicCegarLoop]: 325 mSDtfsCounter, 210 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 22:08:12,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 349 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 22:08:12,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-15 22:08:12,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-15 22:08:12,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:12,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-15 22:08:12,813 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 440 [2021-12-15 22:08:12,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:08:12,813 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-15 22:08:12,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:12,814 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-15 22:08:12,814 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-15 22:08:12,821 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-15 22:08:12,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-15 22:08:13,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:08:13,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.