./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pals_lcr.4_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/pals_lcr.4_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash cbe797ede424f1ab8a64d91092275cecbbdb84c9d61e688c522ae0087e29fe1c --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 07:46:59,212 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 07:46:59,214 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 07:46:59,247 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 07:46:59,247 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 07:46:59,248 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 07:46:59,249 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 07:46:59,251 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 07:46:59,252 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 07:46:59,253 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 07:46:59,254 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 07:46:59,255 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 07:46:59,255 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 07:46:59,256 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 07:46:59,257 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 07:46:59,257 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 07:46:59,258 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 07:46:59,259 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 07:46:59,260 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 07:46:59,262 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 07:46:59,263 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 07:46:59,264 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 07:46:59,265 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 07:46:59,266 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 07:46:59,267 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 07:46:59,269 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 07:46:59,270 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 07:46:59,270 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 07:46:59,271 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 07:46:59,271 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 07:46:59,272 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 07:46:59,272 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 07:46:59,273 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 07:46:59,274 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 07:46:59,274 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 07:46:59,275 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 07:46:59,275 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 07:46:59,276 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 07:46:59,276 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 07:46:59,277 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 07:46:59,277 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 07:46:59,278 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 07:46:59,279 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 07:46:59,298 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 07:46:59,299 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 07:46:59,299 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 07:46:59,299 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 07:46:59,300 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 07:46:59,300 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 07:46:59,300 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 07:46:59,301 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 07:46:59,301 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 07:46:59,301 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 07:46:59,301 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 07:46:59,301 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 07:46:59,302 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 07:46:59,302 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 07:46:59,302 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 07:46:59,302 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 07:46:59,302 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 07:46:59,303 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 07:46:59,303 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 07:46:59,303 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 07:46:59,303 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 07:46:59,303 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 07:46:59,304 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 07:46:59,304 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 07:46:59,304 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 07:46:59,304 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 07:46:59,304 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 07:46:59,305 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 07:46:59,305 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 07:46:59,305 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 07:46:59,305 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 07:46:59,305 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 07:46:59,306 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 07:46:59,306 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cbe797ede424f1ab8a64d91092275cecbbdb84c9d61e688c522ae0087e29fe1c [2022-07-21 07:46:59,589 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 07:46:59,615 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 07:46:59,618 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 07:46:59,618 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 07:46:59,619 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 07:46:59,620 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.4_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c [2022-07-21 07:46:59,677 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0291c8ec/0526a6ab2c214aa4804d256cc622d019/FLAGf14609dcc [2022-07-21 07:47:00,406 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 07:47:00,406 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c [2022-07-21 07:47:00,435 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0291c8ec/0526a6ab2c214aa4804d256cc622d019/FLAGf14609dcc [2022-07-21 07:47:00,523 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0291c8ec/0526a6ab2c214aa4804d256cc622d019 [2022-07-21 07:47:00,525 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 07:47:00,527 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 07:47:00,529 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 07:47:00,529 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 07:47:00,532 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 07:47:00,533 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 07:47:00" (1/1) ... [2022-07-21 07:47:00,535 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10e581d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:47:00, skipping insertion in model container [2022-07-21 07:47:00,535 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 07:47:00" (1/1) ... [2022-07-21 07:47:00,541 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 07:47:00,662 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 07:47:00,962 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c[8786,8799] [2022-07-21 07:47:01,024 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c[15722,15735] [2022-07-21 07:47:01,627 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 07:47:01,634 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 07:47:01,666 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c[8786,8799] [2022-07-21 07:47:01,674 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c[15722,15735] [2022-07-21 07:47:02,060 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 07:47:02,085 INFO L208 MainTranslator]: Completed translation [2022-07-21 07:47:02,085 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:47:02 WrapperNode [2022-07-21 07:47:02,085 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 07:47:02,086 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 07:47:02,087 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 07:47:02,087 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 07:47:02,092 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:47:02" (1/1) ... [2022-07-21 07:47:02,143 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:47:02" (1/1) ... [2022-07-21 07:47:02,432 INFO L137 Inliner]: procedures = 36, calls = 21, calls flagged for inlining = 16, calls inlined = 16, statements flattened = 5029 [2022-07-21 07:47:02,433 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 07:47:02,434 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 07:47:02,434 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 07:47:02,434 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 07:47:02,441 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:47:02" (1/1) ... [2022-07-21 07:47:02,441 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:47:02" (1/1) ... [2022-07-21 07:47:02,559 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:47:02" (1/1) ... [2022-07-21 07:47:02,563 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:47:02" (1/1) ... [2022-07-21 07:47:02,701 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:47:02" (1/1) ... [2022-07-21 07:47:02,729 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:47:02" (1/1) ... [2022-07-21 07:47:02,756 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:47:02" (1/1) ... [2022-07-21 07:47:02,866 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 07:47:02,868 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 07:47:02,868 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 07:47:02,868 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 07:47:02,870 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:47:02" (1/1) ... [2022-07-21 07:47:02,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 07:47:02,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 07:47:02,941 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) [2022-07-21 07:47:03,009 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 [2022-07-21 07:47:03,092 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 07:47:03,092 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 07:47:03,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 07:47:03,093 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 07:47:03,251 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 07:47:03,268 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 07:47:06,393 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 07:47:06,407 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 07:47:06,407 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-21 07:47:06,410 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 07:47:06 BoogieIcfgContainer [2022-07-21 07:47:06,410 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 07:47:06,411 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 07:47:06,412 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 07:47:06,414 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 07:47:06,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 07:47:00" (1/3) ... [2022-07-21 07:47:06,415 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f990159 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 07:47:06, skipping insertion in model container [2022-07-21 07:47:06,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:47:02" (2/3) ... [2022-07-21 07:47:06,415 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f990159 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 07:47:06, skipping insertion in model container [2022-07-21 07:47:06,416 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 07:47:06" (3/3) ... [2022-07-21 07:47:06,417 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c [2022-07-21 07:47:06,429 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 07:47:06,429 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-21 07:47:06,485 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 07:47:06,491 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5f78cc33, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3437e78e [2022-07-21 07:47:06,491 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 07:47:06,498 INFO L276 IsEmpty]: Start isEmpty. Operand has 893 states, 890 states have (on average 1.902247191011236) internal successors, (1693), 892 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:47:06,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-21 07:47:06,505 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:47:06,506 INFO L195 NwaCegarLoop]: 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] [2022-07-21 07:47:06,506 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:47:06,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:47:06,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1675876582, now seen corresponding path program 1 times [2022-07-21 07:47:06,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 07:47:06,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042317393] [2022-07-21 07:47:06,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:47:06,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 07:47:06,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:47:06,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 07:47:06,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 07:47:06,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042317393] [2022-07-21 07:47:06,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042317393] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 07:47:06,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 07:47:06,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 07:47:06,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592397414] [2022-07-21 07:47:06,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 07:47:06,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 07:47:06,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 07:47:06,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 07:47:06,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 07:47:06,687 INFO L87 Difference]: Start difference. First operand has 893 states, 890 states have (on average 1.902247191011236) internal successors, (1693), 892 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:47:06,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 07:47:06,751 INFO L93 Difference]: Finished difference Result 1755 states and 3330 transitions. [2022-07-21 07:47:06,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 07:47:06,756 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 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 30 [2022-07-21 07:47:06,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 07:47:06,774 INFO L225 Difference]: With dead ends: 1755 [2022-07-21 07:47:06,775 INFO L226 Difference]: Without dead ends: 827 [2022-07-21 07:47:06,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 07:47:06,784 INFO L413 NwaCegarLoop]: 1624 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1624 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 07:47:06,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1624 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 07:47:06,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2022-07-21 07:47:06,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 827. [2022-07-21 07:47:06,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 825 states have (on average 1.8909090909090909) internal successors, (1560), 826 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:47:06,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1560 transitions. [2022-07-21 07:47:06,876 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1560 transitions. Word has length 30 [2022-07-21 07:47:06,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 07:47:06,876 INFO L495 AbstractCegarLoop]: Abstraction has 827 states and 1560 transitions. [2022-07-21 07:47:06,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:47:06,877 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1560 transitions. [2022-07-21 07:47:06,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-21 07:47:06,879 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:47:06,879 INFO L195 NwaCegarLoop]: 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] [2022-07-21 07:47:06,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 07:47:06,879 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:47:06,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:47:06,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1541863076, now seen corresponding path program 1 times [2022-07-21 07:47:06,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 07:47:06,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263128721] [2022-07-21 07:47:06,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:47:06,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 07:47:06,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:47:06,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 07:47:06,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 07:47:06,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263128721] [2022-07-21 07:47:06,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263128721] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 07:47:06,988 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 07:47:06,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 07:47:06,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431630065] [2022-07-21 07:47:06,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 07:47:06,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 07:47:06,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 07:47:06,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 07:47:06,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 07:47:06,995 INFO L87 Difference]: Start difference. First operand 827 states and 1560 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:47:07,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 07:47:07,094 INFO L93 Difference]: Finished difference Result 875 states and 1633 transitions. [2022-07-21 07:47:07,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 07:47:07,095 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 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 30 [2022-07-21 07:47:07,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 07:47:07,099 INFO L225 Difference]: With dead ends: 875 [2022-07-21 07:47:07,099 INFO L226 Difference]: Without dead ends: 827 [2022-07-21 07:47:07,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-21 07:47:07,101 INFO L413 NwaCegarLoop]: 1558 mSDtfsCounter, 3 mSDsluCounter, 4648 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6206 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 07:47:07,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 6206 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 07:47:07,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2022-07-21 07:47:07,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 827. [2022-07-21 07:47:07,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 825 states have (on average 1.863030303030303) internal successors, (1537), 826 states have internal predecessors, (1537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:47:07,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1537 transitions. [2022-07-21 07:47:07,124 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1537 transitions. Word has length 30 [2022-07-21 07:47:07,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 07:47:07,124 INFO L495 AbstractCegarLoop]: Abstraction has 827 states and 1537 transitions. [2022-07-21 07:47:07,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:47:07,125 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1537 transitions. [2022-07-21 07:47:07,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-21 07:47:07,126 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:47:07,126 INFO L195 NwaCegarLoop]: 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] [2022-07-21 07:47:07,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 07:47:07,127 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:47:07,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:47:07,128 INFO L85 PathProgramCache]: Analyzing trace with hash 159296799, now seen corresponding path program 1 times [2022-07-21 07:47:07,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 07:47:07,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060145768] [2022-07-21 07:47:07,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:47:07,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 07:47:07,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:47:07,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 07:47:07,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 07:47:07,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060145768] [2022-07-21 07:47:07,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060145768] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 07:47:07,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 07:47:07,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 07:47:07,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390914147] [2022-07-21 07:47:07,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 07:47:07,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 07:47:07,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 07:47:07,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 07:47:07,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 07:47:07,232 INFO L87 Difference]: Start difference. First operand 827 states and 1537 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:47:07,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 07:47:07,259 INFO L93 Difference]: Finished difference Result 909 states and 1665 transitions. [2022-07-21 07:47:07,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 07:47:07,260 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-07-21 07:47:07,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 07:47:07,264 INFO L225 Difference]: With dead ends: 909 [2022-07-21 07:47:07,264 INFO L226 Difference]: Without dead ends: 865 [2022-07-21 07:47:07,267 INFO L412 NwaCegarLoop]: 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 [2022-07-21 07:47:07,271 INFO L413 NwaCegarLoop]: 1592 mSDtfsCounter, 1498 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1498 SdHoareTripleChecker+Valid, 1659 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 07:47:07,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1498 Valid, 1659 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 07:47:07,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2022-07-21 07:47:07,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 863. [2022-07-21 07:47:07,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 861 states have (on average 1.8513356562137049) internal successors, (1594), 862 states have internal predecessors, (1594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:47:07,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 1594 transitions. [2022-07-21 07:47:07,291 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 1594 transitions. Word has length 52 [2022-07-21 07:47:07,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 07:47:07,291 INFO L495 AbstractCegarLoop]: Abstraction has 863 states and 1594 transitions. [2022-07-21 07:47:07,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:47:07,292 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 1594 transitions. [2022-07-21 07:47:07,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-21 07:47:07,301 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:47:07,301 INFO L195 NwaCegarLoop]: 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] [2022-07-21 07:47:07,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 07:47:07,302 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:47:07,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:47:07,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1780734059, now seen corresponding path program 1 times [2022-07-21 07:47:07,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 07:47:07,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746536556] [2022-07-21 07:47:07,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:47:07,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 07:47:07,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:47:07,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 07:47:07,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 07:47:07,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746536556] [2022-07-21 07:47:07,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746536556] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 07:47:07,381 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 07:47:07,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 07:47:07,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349265844] [2022-07-21 07:47:07,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 07:47:07,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 07:47:07,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 07:47:07,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 07:47:07,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 07:47:07,383 INFO L87 Difference]: Start difference. First operand 863 states and 1594 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:47:07,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 07:47:07,409 INFO L93 Difference]: Finished difference Result 1011 states and 1826 transitions. [2022-07-21 07:47:07,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 07:47:07,410 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-07-21 07:47:07,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 07:47:07,414 INFO L225 Difference]: With dead ends: 1011 [2022-07-21 07:47:07,415 INFO L226 Difference]: Without dead ends: 931 [2022-07-21 07:47:07,415 INFO L412 NwaCegarLoop]: 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 [2022-07-21 07:47:07,416 INFO L413 NwaCegarLoop]: 1587 mSDtfsCounter, 1494 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1494 SdHoareTripleChecker+Valid, 1658 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 07:47:07,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1494 Valid, 1658 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 07:47:07,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2022-07-21 07:47:07,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 929. [2022-07-21 07:47:07,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 927 states have (on average 1.8306364617044228) internal successors, (1697), 928 states have internal predecessors, (1697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:47:07,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 1697 transitions. [2022-07-21 07:47:07,443 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 1697 transitions. Word has length 52 [2022-07-21 07:47:07,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 07:47:07,444 INFO L495 AbstractCegarLoop]: Abstraction has 929 states and 1697 transitions. [2022-07-21 07:47:07,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:47:07,444 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 1697 transitions. [2022-07-21 07:47:07,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-21 07:47:07,446 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:47:07,447 INFO L195 NwaCegarLoop]: 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] [2022-07-21 07:47:07,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 07:47:07,447 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:47:07,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:47:07,448 INFO L85 PathProgramCache]: Analyzing trace with hash 919948555, now seen corresponding path program 1 times [2022-07-21 07:47:07,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 07:47:07,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48595384] [2022-07-21 07:47:07,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:47:07,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 07:47:07,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:47:07,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 07:47:07,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 07:47:07,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48595384] [2022-07-21 07:47:07,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48595384] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 07:47:07,573 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 07:47:07,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 07:47:07,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450118357] [2022-07-21 07:47:07,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 07:47:07,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 07:47:07,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 07:47:07,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 07:47:07,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 07:47:07,576 INFO L87 Difference]: Start difference. First operand 929 states and 1697 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:47:07,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 07:47:07,618 INFO L93 Difference]: Finished difference Result 1197 states and 2115 transitions. [2022-07-21 07:47:07,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 07:47:07,619 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-07-21 07:47:07,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 07:47:07,625 INFO L225 Difference]: With dead ends: 1197 [2022-07-21 07:47:07,625 INFO L226 Difference]: Without dead ends: 1051 [2022-07-21 07:47:07,626 INFO L412 NwaCegarLoop]: 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 [2022-07-21 07:47:07,627 INFO L413 NwaCegarLoop]: 1582 mSDtfsCounter, 1490 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1490 SdHoareTripleChecker+Valid, 1657 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 07:47:07,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1490 Valid, 1657 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 07:47:07,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2022-07-21 07:47:07,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 1049. [2022-07-21 07:47:07,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1049 states, 1047 states have (on average 1.7965616045845272) internal successors, (1881), 1048 states have internal predecessors, (1881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:47:07,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 1881 transitions. [2022-07-21 07:47:07,660 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 1881 transitions. Word has length 52 [2022-07-21 07:47:07,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 07:47:07,663 INFO L495 AbstractCegarLoop]: Abstraction has 1049 states and 1881 transitions. [2022-07-21 07:47:07,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:47:07,663 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 1881 transitions. [2022-07-21 07:47:07,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-21 07:47:07,665 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:47:07,666 INFO L195 NwaCegarLoop]: 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] [2022-07-21 07:47:07,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 07:47:07,667 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:47:07,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:47:07,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1515907135, now seen corresponding path program 1 times [2022-07-21 07:47:07,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 07:47:07,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035799783] [2022-07-21 07:47:07,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:47:07,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 07:47:07,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:47:07,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 07:47:07,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 07:47:07,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035799783] [2022-07-21 07:47:07,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035799783] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 07:47:07,729 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 07:47:07,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 07:47:07,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516324754] [2022-07-21 07:47:07,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 07:47:07,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 07:47:07,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 07:47:07,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 07:47:07,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 07:47:07,732 INFO L87 Difference]: Start difference. First operand 1049 states and 1881 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:47:07,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 07:47:07,773 INFO L93 Difference]: Finished difference Result 1533 states and 2627 transitions. [2022-07-21 07:47:07,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 07:47:07,775 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-07-21 07:47:07,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 07:47:07,781 INFO L225 Difference]: With dead ends: 1533 [2022-07-21 07:47:07,782 INFO L226 Difference]: Without dead ends: 1267 [2022-07-21 07:47:07,782 INFO L412 NwaCegarLoop]: 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 [2022-07-21 07:47:07,785 INFO L413 NwaCegarLoop]: 1577 mSDtfsCounter, 1486 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1486 SdHoareTripleChecker+Valid, 1656 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 07:47:07,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1486 Valid, 1656 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 07:47:07,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2022-07-21 07:47:07,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 1265. [2022-07-21 07:47:07,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1265 states, 1263 states have (on average 1.7458432304038005) internal successors, (2205), 1264 states have internal predecessors, (2205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:47:07,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1265 states to 1265 states and 2205 transitions. [2022-07-21 07:47:07,830 INFO L78 Accepts]: Start accepts. Automaton has 1265 states and 2205 transitions. Word has length 52 [2022-07-21 07:47:07,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 07:47:07,832 INFO L495 AbstractCegarLoop]: Abstraction has 1265 states and 2205 transitions. [2022-07-21 07:47:07,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:47:07,832 INFO L276 IsEmpty]: Start isEmpty. Operand 1265 states and 2205 transitions. [2022-07-21 07:47:07,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-21 07:47:07,833 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:47:07,833 INFO L195 NwaCegarLoop]: 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] [2022-07-21 07:47:07,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-21 07:47:07,834 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:47:07,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:47:07,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1924545907, now seen corresponding path program 1 times [2022-07-21 07:47:07,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 07:47:07,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487675992] [2022-07-21 07:47:07,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:47:07,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 07:47:07,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:47:07,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 07:47:07,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 07:47:07,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487675992] [2022-07-21 07:47:07,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487675992] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 07:47:07,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 07:47:07,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 07:47:07,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753381869] [2022-07-21 07:47:07,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 07:47:07,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 07:47:07,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 07:47:07,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 07:47:07,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 07:47:07,918 INFO L87 Difference]: Start difference. First operand 1265 states and 2205 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:47:08,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 07:47:08,249 INFO L93 Difference]: Finished difference Result 5121 states and 8101 transitions. [2022-07-21 07:47:08,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 07:47:08,250 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-07-21 07:47:08,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 07:47:08,267 INFO L225 Difference]: With dead ends: 5121 [2022-07-21 07:47:08,268 INFO L226 Difference]: Without dead ends: 4639 [2022-07-21 07:47:08,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-07-21 07:47:08,273 INFO L413 NwaCegarLoop]: 1531 mSDtfsCounter, 6521 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6521 SdHoareTripleChecker+Valid, 2068 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 07:47:08,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6521 Valid, 2068 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 07:47:08,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4639 states. [2022-07-21 07:47:08,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4639 to 1745. [2022-07-21 07:47:08,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1745 states, 1743 states have (on average 1.6689615605278256) internal successors, (2909), 1744 states have internal predecessors, (2909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:47:08,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1745 states to 1745 states and 2909 transitions. [2022-07-21 07:47:08,398 INFO L78 Accepts]: Start accepts. Automaton has 1745 states and 2909 transitions. Word has length 52 [2022-07-21 07:47:08,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 07:47:08,399 INFO L495 AbstractCegarLoop]: Abstraction has 1745 states and 2909 transitions. [2022-07-21 07:47:08,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:47:08,399 INFO L276 IsEmpty]: Start isEmpty. Operand 1745 states and 2909 transitions. [2022-07-21 07:47:08,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-21 07:47:08,403 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:47:08,403 INFO L195 NwaCegarLoop]: 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] [2022-07-21 07:47:08,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-21 07:47:08,403 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:47:08,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:47:08,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1236981091, now seen corresponding path program 1 times [2022-07-21 07:47:08,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 07:47:08,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679676208] [2022-07-21 07:47:08,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:47:08,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 07:47:08,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:47:08,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 07:47:08,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 07:47:08,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679676208] [2022-07-21 07:47:08,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679676208] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 07:47:08,472 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 07:47:08,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 07:47:08,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642887442] [2022-07-21 07:47:08,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 07:47:08,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 07:47:08,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 07:47:08,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 07:47:08,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 07:47:08,474 INFO L87 Difference]: Start difference. First operand 1745 states and 2909 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:47:08,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 07:47:08,640 INFO L93 Difference]: Finished difference Result 3151 states and 5009 transitions. [2022-07-21 07:47:08,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 07:47:08,640 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-07-21 07:47:08,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 07:47:08,650 INFO L225 Difference]: With dead ends: 3151 [2022-07-21 07:47:08,650 INFO L226 Difference]: Without dead ends: 2189 [2022-07-21 07:47:08,653 INFO L412 NwaCegarLoop]: 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 [2022-07-21 07:47:08,653 INFO L413 NwaCegarLoop]: 1559 mSDtfsCounter, 1478 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1478 SdHoareTripleChecker+Valid, 1623 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 07:47:08,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1478 Valid, 1623 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 07:47:08,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2189 states. [2022-07-21 07:47:08,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2189 to 2187. [2022-07-21 07:47:08,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2187 states, 2185 states have (on average 1.6215102974828375) internal successors, (3543), 2186 states have internal predecessors, (3543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:47:08,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2187 states to 2187 states and 3543 transitions. [2022-07-21 07:47:08,758 INFO L78 Accepts]: Start accepts. Automaton has 2187 states and 3543 transitions. Word has length 54 [2022-07-21 07:47:08,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 07:47:08,759 INFO L495 AbstractCegarLoop]: Abstraction has 2187 states and 3543 transitions. [2022-07-21 07:47:08,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:47:08,759 INFO L276 IsEmpty]: Start isEmpty. Operand 2187 states and 3543 transitions. [2022-07-21 07:47:08,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-21 07:47:08,760 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:47:08,761 INFO L195 NwaCegarLoop]: 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] [2022-07-21 07:47:08,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-21 07:47:08,762 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:47:08,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:47:08,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1303474603, now seen corresponding path program 1 times [2022-07-21 07:47:08,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 07:47:08,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698155000] [2022-07-21 07:47:08,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:47:08,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 07:47:08,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:47:08,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 07:47:08,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 07:47:08,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698155000] [2022-07-21 07:47:08,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698155000] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 07:47:08,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 07:47:08,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 07:47:08,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120827751] [2022-07-21 07:47:08,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 07:47:08,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 07:47:08,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 07:47:08,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 07:47:08,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-21 07:47:08,907 INFO L87 Difference]: Start difference. First operand 2187 states and 3543 transitions. Second operand has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:47:09,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 07:47:09,105 INFO L93 Difference]: Finished difference Result 3591 states and 5617 transitions. [2022-07-21 07:47:09,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 07:47:09,106 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-07-21 07:47:09,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 07:47:09,114 INFO L225 Difference]: With dead ends: 3591 [2022-07-21 07:47:09,114 INFO L226 Difference]: Without dead ends: 2189 [2022-07-21 07:47:09,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-07-21 07:47:09,118 INFO L413 NwaCegarLoop]: 1531 mSDtfsCounter, 3072 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3072 SdHoareTripleChecker+Valid, 1732 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 07:47:09,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3072 Valid, 1732 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 07:47:09,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2189 states. [2022-07-21 07:47:09,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2189 to 2187. [2022-07-21 07:47:09,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2187 states, 2185 states have (on average 1.6105263157894736) internal successors, (3519), 2186 states have internal predecessors, (3519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:47:09,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2187 states to 2187 states and 3519 transitions. [2022-07-21 07:47:09,219 INFO L78 Accepts]: Start accepts. Automaton has 2187 states and 3519 transitions. Word has length 54 [2022-07-21 07:47:09,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 07:47:09,219 INFO L495 AbstractCegarLoop]: Abstraction has 2187 states and 3519 transitions. [2022-07-21 07:47:09,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:47:09,220 INFO L276 IsEmpty]: Start isEmpty. Operand 2187 states and 3519 transitions. [2022-07-21 07:47:09,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-21 07:47:09,220 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:47:09,221 INFO L195 NwaCegarLoop]: 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] [2022-07-21 07:47:09,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-21 07:47:09,221 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:47:09,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:47:09,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1338283904, now seen corresponding path program 1 times [2022-07-21 07:47:09,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 07:47:09,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957184376] [2022-07-21 07:47:09,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:47:09,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 07:47:09,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:47:09,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 07:47:09,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 07:47:09,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957184376] [2022-07-21 07:47:09,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957184376] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 07:47:09,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 07:47:09,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 07:47:09,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648629037] [2022-07-21 07:47:09,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 07:47:09,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 07:47:09,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 07:47:09,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 07:47:09,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 07:47:09,305 INFO L87 Difference]: Start difference. First operand 2187 states and 3519 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:47:09,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 07:47:09,483 INFO L93 Difference]: Finished difference Result 3589 states and 5568 transitions. [2022-07-21 07:47:09,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 07:47:09,483 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-07-21 07:47:09,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 07:47:09,491 INFO L225 Difference]: With dead ends: 3589 [2022-07-21 07:47:09,492 INFO L226 Difference]: Without dead ends: 2187 [2022-07-21 07:47:09,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-07-21 07:47:09,494 INFO L413 NwaCegarLoop]: 1503 mSDtfsCounter, 4543 mSDsluCounter, 1489 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4543 SdHoareTripleChecker+Valid, 2992 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 07:47:09,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4543 Valid, 2992 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 07:47:09,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2187 states. [2022-07-21 07:47:09,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2187 to 2187. [2022-07-21 07:47:09,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2187 states, 2185 states have (on average 1.59954233409611) internal successors, (3495), 2186 states have internal predecessors, (3495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:47:09,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2187 states to 2187 states and 3495 transitions. [2022-07-21 07:47:09,647 INFO L78 Accepts]: Start accepts. Automaton has 2187 states and 3495 transitions. Word has length 55 [2022-07-21 07:47:09,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 07:47:09,647 INFO L495 AbstractCegarLoop]: Abstraction has 2187 states and 3495 transitions. [2022-07-21 07:47:09,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:47:09,648 INFO L276 IsEmpty]: Start isEmpty. Operand 2187 states and 3495 transitions. [2022-07-21 07:47:09,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-21 07:47:09,648 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:47:09,648 INFO L195 NwaCegarLoop]: 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] [2022-07-21 07:47:09,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-21 07:47:09,649 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:47:09,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:47:09,649 INFO L85 PathProgramCache]: Analyzing trace with hash 637219326, now seen corresponding path program 1 times [2022-07-21 07:47:09,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 07:47:09,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546140761] [2022-07-21 07:47:09,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:47:09,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 07:47:09,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:47:09,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 07:47:09,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 07:47:09,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546140761] [2022-07-21 07:47:09,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546140761] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 07:47:09,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 07:47:09,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 07:47:09,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063833870] [2022-07-21 07:47:09,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 07:47:09,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 07:47:09,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 07:47:09,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 07:47:09,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 07:47:09,722 INFO L87 Difference]: Start difference. First operand 2187 states and 3495 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:47:09,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 07:47:09,930 INFO L93 Difference]: Finished difference Result 3589 states and 5520 transitions. [2022-07-21 07:47:09,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 07:47:09,931 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-07-21 07:47:09,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 07:47:09,939 INFO L225 Difference]: With dead ends: 3589 [2022-07-21 07:47:09,939 INFO L226 Difference]: Without dead ends: 2187 [2022-07-21 07:47:09,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-07-21 07:47:09,941 INFO L413 NwaCegarLoop]: 1505 mSDtfsCounter, 4627 mSDsluCounter, 1477 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4627 SdHoareTripleChecker+Valid, 2982 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 07:47:09,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4627 Valid, 2982 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 07:47:09,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2187 states. [2022-07-21 07:47:10,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2187 to 2187. [2022-07-21 07:47:10,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2187 states, 2185 states have (on average 1.588558352402746) internal successors, (3471), 2186 states have internal predecessors, (3471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:47:10,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2187 states to 2187 states and 3471 transitions. [2022-07-21 07:47:10,073 INFO L78 Accepts]: Start accepts. Automaton has 2187 states and 3471 transitions. Word has length 55 [2022-07-21 07:47:10,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 07:47:10,074 INFO L495 AbstractCegarLoop]: Abstraction has 2187 states and 3471 transitions. [2022-07-21 07:47:10,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:47:10,075 INFO L276 IsEmpty]: Start isEmpty. Operand 2187 states and 3471 transitions. [2022-07-21 07:47:10,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-21 07:47:10,076 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:47:10,076 INFO L195 NwaCegarLoop]: 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] [2022-07-21 07:47:10,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-21 07:47:10,076 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:47:10,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:47:10,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1917083004, now seen corresponding path program 1 times [2022-07-21 07:47:10,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 07:47:10,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144737102] [2022-07-21 07:47:10,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:47:10,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 07:47:10,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:47:10,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 07:47:10,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 07:47:10,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144737102] [2022-07-21 07:47:10,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144737102] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 07:47:10,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 07:47:10,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-21 07:47:10,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733006553] [2022-07-21 07:47:10,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 07:47:10,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 07:47:10,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 07:47:10,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 07:47:10,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-21 07:47:10,153 INFO L87 Difference]: Start difference. First operand 2187 states and 3471 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:47:10,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 07:47:10,539 INFO L93 Difference]: Finished difference Result 3418 states and 5169 transitions. [2022-07-21 07:47:10,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 07:47:10,540 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-07-21 07:47:10,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 07:47:10,551 INFO L225 Difference]: With dead ends: 3418 [2022-07-21 07:47:10,552 INFO L226 Difference]: Without dead ends: 3416 [2022-07-21 07:47:10,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2022-07-21 07:47:10,553 INFO L413 NwaCegarLoop]: 1552 mSDtfsCounter, 514 mSDsluCounter, 8978 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 514 SdHoareTripleChecker+Valid, 10530 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 07:47:10,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [514 Valid, 10530 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 07:47:10,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3416 states. [2022-07-21 07:47:10,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3416 to 2283. [2022-07-21 07:47:10,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2283 states, 2281 states have (on average 1.5602805786935554) internal successors, (3559), 2282 states have internal predecessors, (3559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:47:10,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2283 states to 2283 states and 3559 transitions. [2022-07-21 07:47:10,728 INFO L78 Accepts]: Start accepts. Automaton has 2283 states and 3559 transitions. Word has length 55 [2022-07-21 07:47:10,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 07:47:10,729 INFO L495 AbstractCegarLoop]: Abstraction has 2283 states and 3559 transitions. [2022-07-21 07:47:10,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:47:10,729 INFO L276 IsEmpty]: Start isEmpty. Operand 2283 states and 3559 transitions. [2022-07-21 07:47:10,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-21 07:47:10,730 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:47:10,730 INFO L195 NwaCegarLoop]: 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] [2022-07-21 07:47:10,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-21 07:47:10,730 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:47:10,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:47:10,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1748179653, now seen corresponding path program 1 times [2022-07-21 07:47:10,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 07:47:10,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620051622] [2022-07-21 07:47:10,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:47:10,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 07:47:10,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:47:10,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 07:47:10,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 07:47:10,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620051622] [2022-07-21 07:47:10,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620051622] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 07:47:10,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 07:47:10,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 07:47:10,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155288888] [2022-07-21 07:47:10,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 07:47:10,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 07:47:10,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 07:47:10,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 07:47:10,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 07:47:10,785 INFO L87 Difference]: Start difference. First operand 2283 states and 3559 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:47:16,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 07:47:16,405 INFO L93 Difference]: Finished difference Result 4538 states and 7868 transitions. [2022-07-21 07:47:16,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 07:47:16,406 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-07-21 07:47:16,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 07:47:16,422 INFO L225 Difference]: With dead ends: 4538 [2022-07-21 07:47:16,423 INFO L226 Difference]: Without dead ends: 3785 [2022-07-21 07:47:16,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 07:47:16,425 INFO L413 NwaCegarLoop]: 789 mSDtfsCounter, 2373 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 5518 mSolverCounterSat, 1100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2373 SdHoareTripleChecker+Valid, 807 SdHoareTripleChecker+Invalid, 6618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1100 IncrementalHoareTripleChecker+Valid, 5518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-07-21 07:47:16,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2373 Valid, 807 Invalid, 6618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1100 Valid, 5518 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2022-07-21 07:47:16,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3785 states. [2022-07-21 07:47:16,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3785 to 3785. [2022-07-21 07:47:16,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3785 states, 3783 states have (on average 1.5027755749405234) internal successors, (5685), 3784 states have internal predecessors, (5685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:47:16,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3785 states to 3785 states and 5685 transitions. [2022-07-21 07:47:16,669 INFO L78 Accepts]: Start accepts. Automaton has 3785 states and 5685 transitions. Word has length 60 [2022-07-21 07:47:16,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 07:47:16,670 INFO L495 AbstractCegarLoop]: Abstraction has 3785 states and 5685 transitions. [2022-07-21 07:47:16,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:47:16,670 INFO L276 IsEmpty]: Start isEmpty. Operand 3785 states and 5685 transitions. [2022-07-21 07:47:16,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-21 07:47:16,674 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:47:16,674 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-21 07:47:16,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-21 07:47:16,674 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:47:16,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:47:16,675 INFO L85 PathProgramCache]: Analyzing trace with hash -484645446, now seen corresponding path program 1 times [2022-07-21 07:47:16,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 07:47:16,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131740272] [2022-07-21 07:47:16,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:47:16,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 07:47:16,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:47:16,740 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-21 07:47:16,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 07:47:16,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131740272] [2022-07-21 07:47:16,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131740272] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 07:47:16,741 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 07:47:16,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 07:47:16,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813578840] [2022-07-21 07:47:16,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 07:47:16,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 07:47:16,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 07:47:16,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 07:47:16,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 07:47:16,743 INFO L87 Difference]: Start difference. First operand 3785 states and 5685 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:47:17,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 07:47:17,499 INFO L93 Difference]: Finished difference Result 10091 states and 14454 transitions. [2022-07-21 07:47:17,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 07:47:17,500 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-07-21 07:47:17,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 07:47:17,530 INFO L225 Difference]: With dead ends: 10091 [2022-07-21 07:47:17,530 INFO L226 Difference]: Without dead ends: 8593 [2022-07-21 07:47:17,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-07-21 07:47:17,534 INFO L413 NwaCegarLoop]: 1592 mSDtfsCounter, 4751 mSDsluCounter, 1738 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4751 SdHoareTripleChecker+Valid, 3330 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 07:47:17,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4751 Valid, 3330 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 07:47:17,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8593 states. [2022-07-21 07:47:17,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8593 to 5281. [2022-07-21 07:47:17,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5281 states, 5279 states have (on average 1.4678916461451033) internal successors, (7749), 5280 states have internal predecessors, (7749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:47:17,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5281 states to 5281 states and 7749 transitions. [2022-07-21 07:47:17,886 INFO L78 Accepts]: Start accepts. Automaton has 5281 states and 7749 transitions. Word has length 79 [2022-07-21 07:47:17,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 07:47:17,887 INFO L495 AbstractCegarLoop]: Abstraction has 5281 states and 7749 transitions. [2022-07-21 07:47:17,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:47:17,887 INFO L276 IsEmpty]: Start isEmpty. Operand 5281 states and 7749 transitions. [2022-07-21 07:47:17,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-21 07:47:17,889 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:47:17,889 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-21 07:47:17,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-21 07:47:17,890 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:47:17,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:47:17,890 INFO L85 PathProgramCache]: Analyzing trace with hash 2041539034, now seen corresponding path program 1 times [2022-07-21 07:47:17,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 07:47:17,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198789030] [2022-07-21 07:47:17,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:47:17,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 07:47:17,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:47:17,941 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 07:47:17,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 07:47:17,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198789030] [2022-07-21 07:47:17,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198789030] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 07:47:17,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 07:47:17,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 07:47:17,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203527596] [2022-07-21 07:47:17,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 07:47:17,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 07:47:17,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 07:47:17,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 07:47:17,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 07:47:17,944 INFO L87 Difference]: Start difference. First operand 5281 states and 7749 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:47:18,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 07:47:18,621 INFO L93 Difference]: Finished difference Result 11587 states and 16518 transitions. [2022-07-21 07:47:18,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 07:47:18,621 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-07-21 07:47:18,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 07:47:18,639 INFO L225 Difference]: With dead ends: 11587 [2022-07-21 07:47:18,640 INFO L226 Difference]: Without dead ends: 10089 [2022-07-21 07:47:18,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-07-21 07:47:18,646 INFO L413 NwaCegarLoop]: 1592 mSDtfsCounter, 4706 mSDsluCounter, 1787 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4706 SdHoareTripleChecker+Valid, 3379 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 07:47:18,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4706 Valid, 3379 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 07:47:18,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10089 states. [2022-07-21 07:47:19,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10089 to 7529. [2022-07-21 07:47:19,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7529 states, 7527 states have (on average 1.4381559718347283) internal successors, (10825), 7528 states have internal predecessors, (10825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:47:19,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7529 states to 7529 states and 10825 transitions. [2022-07-21 07:47:19,279 INFO L78 Accepts]: Start accepts. Automaton has 7529 states and 10825 transitions. Word has length 79 [2022-07-21 07:47:19,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 07:47:19,279 INFO L495 AbstractCegarLoop]: Abstraction has 7529 states and 10825 transitions. [2022-07-21 07:47:19,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:47:19,280 INFO L276 IsEmpty]: Start isEmpty. Operand 7529 states and 10825 transitions. [2022-07-21 07:47:19,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-21 07:47:19,281 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:47:19,282 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-21 07:47:19,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-21 07:47:19,282 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:47:19,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:47:19,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1121788422, now seen corresponding path program 1 times [2022-07-21 07:47:19,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 07:47:19,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677211928] [2022-07-21 07:47:19,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:47:19,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 07:47:19,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:47:19,331 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 07:47:19,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 07:47:19,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677211928] [2022-07-21 07:47:19,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677211928] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 07:47:19,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 07:47:19,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 07:47:19,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141234931] [2022-07-21 07:47:19,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 07:47:19,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 07:47:19,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 07:47:19,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 07:47:19,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 07:47:19,335 INFO L87 Difference]: Start difference. First operand 7529 states and 10825 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:47:20,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 07:47:20,133 INFO L93 Difference]: Finished difference Result 13083 states and 18582 transitions. [2022-07-21 07:47:20,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 07:47:20,139 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-07-21 07:47:20,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 07:47:20,161 INFO L225 Difference]: With dead ends: 13083 [2022-07-21 07:47:20,161 INFO L226 Difference]: Without dead ends: 11585 [2022-07-21 07:47:20,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-07-21 07:47:20,167 INFO L413 NwaCegarLoop]: 1593 mSDtfsCounter, 4740 mSDsluCounter, 1789 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4740 SdHoareTripleChecker+Valid, 3382 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 07:47:20,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4740 Valid, 3382 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 07:47:20,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11585 states. [2022-07-21 07:47:20,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11585 to 9025. [2022-07-21 07:47:20,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9025 states, 9023 states have (on average 1.428460600687133) internal successors, (12889), 9024 states have internal predecessors, (12889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:47:20,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9025 states to 9025 states and 12889 transitions. [2022-07-21 07:47:20,796 INFO L78 Accepts]: Start accepts. Automaton has 9025 states and 12889 transitions. Word has length 79 [2022-07-21 07:47:20,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 07:47:20,797 INFO L495 AbstractCegarLoop]: Abstraction has 9025 states and 12889 transitions. [2022-07-21 07:47:20,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:47:20,797 INFO L276 IsEmpty]: Start isEmpty. Operand 9025 states and 12889 transitions. [2022-07-21 07:47:20,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-21 07:47:20,800 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:47:20,800 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-21 07:47:20,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-21 07:47:20,800 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:47:20,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:47:20,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1937719834, now seen corresponding path program 1 times [2022-07-21 07:47:20,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 07:47:20,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984339090] [2022-07-21 07:47:20,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:47:20,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 07:47:20,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:47:20,853 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 07:47:20,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 07:47:20,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984339090] [2022-07-21 07:47:20,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984339090] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 07:47:20,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 07:47:20,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 07:47:20,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865010742] [2022-07-21 07:47:20,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 07:47:20,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 07:47:20,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 07:47:20,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 07:47:20,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 07:47:20,855 INFO L87 Difference]: Start difference. First operand 9025 states and 12889 transitions. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:47:21,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 07:47:21,726 INFO L93 Difference]: Finished difference Result 13699 states and 19446 transitions. [2022-07-21 07:47:21,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 07:47:21,727 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-07-21 07:47:21,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 07:47:21,748 INFO L225 Difference]: With dead ends: 13699 [2022-07-21 07:47:21,749 INFO L226 Difference]: Without dead ends: 12641 [2022-07-21 07:47:21,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-07-21 07:47:21,754 INFO L413 NwaCegarLoop]: 1590 mSDtfsCounter, 4739 mSDsluCounter, 1745 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4739 SdHoareTripleChecker+Valid, 3335 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 07:47:21,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4739 Valid, 3335 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 07:47:21,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12641 states. [2022-07-21 07:47:22,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12641 to 10081. [2022-07-21 07:47:22,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10081 states, 10079 states have (on average 1.42484373449747) internal successors, (14361), 10080 states have internal predecessors, (14361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:47:22,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10081 states to 10081 states and 14361 transitions. [2022-07-21 07:47:22,608 INFO L78 Accepts]: Start accepts. Automaton has 10081 states and 14361 transitions. Word has length 79 [2022-07-21 07:47:22,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 07:47:22,608 INFO L495 AbstractCegarLoop]: Abstraction has 10081 states and 14361 transitions. [2022-07-21 07:47:22,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:47:22,609 INFO L276 IsEmpty]: Start isEmpty. Operand 10081 states and 14361 transitions. [2022-07-21 07:47:22,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-21 07:47:22,612 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:47:22,612 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 07:47:22,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-21 07:47:22,612 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:47:22,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:47:22,613 INFO L85 PathProgramCache]: Analyzing trace with hash -596667294, now seen corresponding path program 1 times [2022-07-21 07:47:22,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 07:47:22,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194619955] [2022-07-21 07:47:22,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:47:22,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 07:47:22,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:47:22,829 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 07:47:22,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 07:47:22,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194619955] [2022-07-21 07:47:22,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194619955] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 07:47:22,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368100591] [2022-07-21 07:47:22,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:47:22,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 07:47:22,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 07:47:22,832 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) [2022-07-21 07:47:22,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 07:47:22,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:47:22,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-21 07:47:22,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 07:47:23,322 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 07:47:23,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 07:47:23,503 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 07:47:23,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368100591] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 07:47:23,504 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 07:47:23,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4, 4] total 18 [2022-07-21 07:47:23,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623881509] [2022-07-21 07:47:23,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 07:47:23,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 07:47:23,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 07:47:23,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 07:47:23,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-07-21 07:47:23,506 INFO L87 Difference]: Start difference. First operand 10081 states and 14361 transitions. Second operand has 18 states, 18 states have (on average 12.38888888888889) internal successors, (223), 18 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:47:39,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 07:47:39,288 INFO L93 Difference]: Finished difference Result 117349 states and 161271 transitions. [2022-07-21 07:47:39,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2022-07-21 07:47:39,289 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 12.38888888888889) internal successors, (223), 18 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-07-21 07:47:39,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 07:47:39,473 INFO L225 Difference]: With dead ends: 117349 [2022-07-21 07:47:39,474 INFO L226 Difference]: Without dead ends: 109555 [2022-07-21 07:47:39,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 155 SyntacticMatches, 1 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11156 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=4231, Invalid=21209, Unknown=0, NotChecked=0, Total=25440 [2022-07-21 07:47:39,507 INFO L413 NwaCegarLoop]: 1657 mSDtfsCounter, 18127 mSDsluCounter, 5810 mSDsCounter, 0 mSdLazyCounter, 1871 mSolverCounterSat, 329 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18127 SdHoareTripleChecker+Valid, 7467 SdHoareTripleChecker+Invalid, 2200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 329 IncrementalHoareTripleChecker+Valid, 1871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-21 07:47:39,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18127 Valid, 7467 Invalid, 2200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [329 Valid, 1871 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-21 07:47:39,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109555 states. [2022-07-21 07:47:45,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109555 to 56409. [2022-07-21 07:47:45,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56409 states, 56407 states have (on average 1.3639264630276384) internal successors, (76935), 56408 states have internal predecessors, (76935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:47:45,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56409 states to 56409 states and 76935 transitions. [2022-07-21 07:47:45,917 INFO L78 Accepts]: Start accepts. Automaton has 56409 states and 76935 transitions. Word has length 80 [2022-07-21 07:47:45,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 07:47:45,918 INFO L495 AbstractCegarLoop]: Abstraction has 56409 states and 76935 transitions. [2022-07-21 07:47:45,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 12.38888888888889) internal successors, (223), 18 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:47:45,918 INFO L276 IsEmpty]: Start isEmpty. Operand 56409 states and 76935 transitions. [2022-07-21 07:47:45,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-21 07:47:45,922 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:47:45,922 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 07:47:45,944 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-21 07:47:46,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-21 07:47:46,140 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:47:46,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:47:46,140 INFO L85 PathProgramCache]: Analyzing trace with hash 2064719954, now seen corresponding path program 1 times [2022-07-21 07:47:46,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 07:47:46,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032200831] [2022-07-21 07:47:46,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:47:46,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 07:47:46,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:47:46,371 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 07:47:46,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 07:47:46,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032200831] [2022-07-21 07:47:46,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032200831] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 07:47:46,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647090344] [2022-07-21 07:47:46,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:47:46,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 07:47:46,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 07:47:46,374 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) [2022-07-21 07:47:46,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 07:47:46,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:47:46,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 07:47:46,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 07:47:47,072 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 07:47:47,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 07:47:47,471 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 07:47:47,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647090344] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 07:47:47,471 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 07:47:47,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 27 [2022-07-21 07:47:47,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413482326] [2022-07-21 07:47:47,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 07:47:47,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-21 07:47:47,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 07:47:47,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-21 07:47:47,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2022-07-21 07:47:47,474 INFO L87 Difference]: Start difference. First operand 56409 states and 76935 transitions. Second operand has 28 states, 28 states have (on average 7.178571428571429) internal successors, (201), 27 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)