./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem17_label29.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem17_label29.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 e1d19cb304638f43d39081097001c07d13a3f7b236de84abf3505fba1ece23c0 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-15 23:00:58,135 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 23:00:58,144 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 23:00:58,183 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 23:00:58,188 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 23:00:58,190 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 23:00:58,192 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 23:00:58,196 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 23:00:58,199 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 23:00:58,200 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 23:00:58,200 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 23:00:58,201 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 23:00:58,203 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 23:00:58,205 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 23:00:58,207 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 23:00:58,209 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 23:00:58,210 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 23:00:58,216 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 23:00:58,217 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 23:00:58,219 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 23:00:58,228 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 23:00:58,229 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 23:00:58,230 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 23:00:58,231 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 23:00:58,234 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 23:00:58,236 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 23:00:58,237 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 23:00:58,238 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 23:00:58,239 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 23:00:58,239 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 23:00:58,240 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 23:00:58,241 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 23:00:58,242 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 23:00:58,243 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 23:00:58,244 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 23:00:58,245 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 23:00:58,245 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 23:00:58,245 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 23:00:58,246 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 23:00:58,246 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 23:00:58,247 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 23:00:58,248 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 23:00:58,283 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 23:00:58,286 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 23:00:58,286 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 23:00:58,286 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 23:00:58,287 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 23:00:58,288 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 23:00:58,288 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 23:00:58,288 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 23:00:58,289 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 23:00:58,289 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 23:00:58,290 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 23:00:58,290 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 23:00:58,290 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 23:00:58,291 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 23:00:58,291 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 23:00:58,291 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 23:00:58,291 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 23:00:58,291 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 23:00:58,291 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 23:00:58,292 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 23:00:58,292 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 23:00:58,292 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 23:00:58,292 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 23:00:58,292 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 23:00:58,293 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 23:00:58,293 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 23:00:58,293 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 23:00:58,294 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 23:00:58,295 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 23:00:58,295 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 23:00:58,295 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 23:00:58,295 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 23:00:58,295 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 23:00:58,296 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 23:00:58,296 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e1d19cb304638f43d39081097001c07d13a3f7b236de84abf3505fba1ece23c0 [2021-12-15 23:00:58,555 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 23:00:58,579 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 23:00:58,582 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 23:00:58,583 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 23:00:58,583 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 23:00:58,585 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem17_label29.c [2021-12-15 23:00:58,646 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75a1395b1/64093d4068d14019930e6eba6191fa2c/FLAG1bf1cf04f [2021-12-15 23:00:59,243 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 23:00:59,244 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label29.c [2021-12-15 23:00:59,267 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75a1395b1/64093d4068d14019930e6eba6191fa2c/FLAG1bf1cf04f [2021-12-15 23:00:59,666 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75a1395b1/64093d4068d14019930e6eba6191fa2c [2021-12-15 23:00:59,669 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 23:00:59,672 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 23:00:59,675 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 23:00:59,675 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 23:00:59,678 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 23:00:59,679 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:00:59" (1/1) ... [2021-12-15 23:00:59,681 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7638a5ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:00:59, skipping insertion in model container [2021-12-15 23:00:59,681 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:00:59" (1/1) ... [2021-12-15 23:00:59,686 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 23:00:59,760 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 23:01:00,047 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label29.c[9671,9684] [2021-12-15 23:01:00,491 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 23:01:00,499 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 23:01:00,532 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label29.c[9671,9684] [2021-12-15 23:01:00,762 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 23:01:00,778 INFO L208 MainTranslator]: Completed translation [2021-12-15 23:01:00,779 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:01:00 WrapperNode [2021-12-15 23:01:00,779 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 23:01:00,780 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 23:01:00,780 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 23:01:00,781 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 23:01:00,786 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:01:00" (1/1) ... [2021-12-15 23:01:00,836 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:01:00" (1/1) ... [2021-12-15 23:01:01,091 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2611 [2021-12-15 23:01:01,092 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 23:01:01,093 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 23:01:01,093 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 23:01:01,093 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 23:01:01,100 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:01:00" (1/1) ... [2021-12-15 23:01:01,101 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:01:00" (1/1) ... [2021-12-15 23:01:01,198 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:01:00" (1/1) ... [2021-12-15 23:01:01,201 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:01:00" (1/1) ... [2021-12-15 23:01:01,313 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:01:00" (1/1) ... [2021-12-15 23:01:01,340 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:01:00" (1/1) ... [2021-12-15 23:01:01,359 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:01:00" (1/1) ... [2021-12-15 23:01:01,393 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 23:01:01,395 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 23:01:01,395 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 23:01:01,396 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 23:01:01,396 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:01:00" (1/1) ... [2021-12-15 23:01:01,443 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 23:01:01,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 23:01:01,481 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 23:01:01,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 23:01:01,578 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 23:01:01,591 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 23:01:01,591 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 23:01:01,592 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 23:01:01,675 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 23:01:01,677 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 23:01:04,339 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 23:01:04,355 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 23:01:04,357 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 23:01:04,359 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:01:04 BoogieIcfgContainer [2021-12-15 23:01:04,360 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 23:01:04,361 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 23:01:04,361 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 23:01:04,364 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 23:01:04,364 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 11:00:59" (1/3) ... [2021-12-15 23:01:04,365 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2084032c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:01:04, skipping insertion in model container [2021-12-15 23:01:04,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:01:00" (2/3) ... [2021-12-15 23:01:04,366 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2084032c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:01:04, skipping insertion in model container [2021-12-15 23:01:04,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:01:04" (3/3) ... [2021-12-15 23:01:04,367 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label29.c [2021-12-15 23:01:04,372 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 23:01:04,372 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 23:01:04,414 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 23:01:04,420 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 23:01:04,420 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 23:01:04,444 INFO L276 IsEmpty]: Start isEmpty. Operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:01:04,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-15 23:01:04,451 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:01:04,452 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:01:04,453 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:01:04,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:01:04,458 INFO L85 PathProgramCache]: Analyzing trace with hash 962891993, now seen corresponding path program 1 times [2021-12-15 23:01:04,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:01:04,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447469045] [2021-12-15 23:01:04,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:01:04,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:01:04,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:01:04,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:01:04,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:01:04,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447469045] [2021-12-15 23:01:04,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447469045] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:01:04,745 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:01:04,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 23:01:04,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156699541] [2021-12-15 23:01:04,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:01:04,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:01:04,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:01:04,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:01:04,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:01:04,787 INFO L87 Difference]: Start difference. First operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:01:07,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:01:07,554 INFO L93 Difference]: Finished difference Result 1667 states and 3061 transitions. [2021-12-15 23:01:07,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:01:07,561 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 0 states have call successors, (0), 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 65 [2021-12-15 23:01:07,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:01:07,578 INFO L225 Difference]: With dead ends: 1667 [2021-12-15 23:01:07,579 INFO L226 Difference]: Without dead ends: 998 [2021-12-15 23:01:07,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:01:07,588 INFO L933 BasicCegarLoop]: 214 mSDtfsCounter, 480 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1566 mSolverCounterSat, 396 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 1962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 396 IncrementalHoareTripleChecker+Valid, 1566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-15 23:01:07,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [480 Valid, 276 Invalid, 1962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [396 Valid, 1566 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-15 23:01:07,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2021-12-15 23:01:07,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 982. [2021-12-15 23:01:07,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 982 states, 981 states have (on average 1.707441386340469) internal successors, (1675), 981 states have internal predecessors, (1675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:01:07,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 1675 transitions. [2021-12-15 23:01:07,667 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 1675 transitions. Word has length 65 [2021-12-15 23:01:07,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:01:07,667 INFO L470 AbstractCegarLoop]: Abstraction has 982 states and 1675 transitions. [2021-12-15 23:01:07,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:01:07,668 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 1675 transitions. [2021-12-15 23:01:07,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-12-15 23:01:07,672 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:01:07,672 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:01:07,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 23:01:07,673 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:01:07,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:01:07,673 INFO L85 PathProgramCache]: Analyzing trace with hash -63745155, now seen corresponding path program 1 times [2021-12-15 23:01:07,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:01:07,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575674266] [2021-12-15 23:01:07,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:01:07,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:01:07,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:01:07,804 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:01:07,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:01:07,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575674266] [2021-12-15 23:01:07,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575674266] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:01:07,805 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:01:07,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 23:01:07,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141360229] [2021-12-15 23:01:07,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:01:07,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:01:07,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:01:07,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:01:07,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:01:07,808 INFO L87 Difference]: Start difference. First operand 982 states and 1675 transitions. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 2 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:01:10,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:01:10,015 INFO L93 Difference]: Finished difference Result 2841 states and 4881 transitions. [2021-12-15 23:01:10,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:01:10,016 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 2 states have internal predecessors, (130), 0 states have call successors, (0), 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 130 [2021-12-15 23:01:10,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:01:10,024 INFO L225 Difference]: With dead ends: 2841 [2021-12-15 23:01:10,025 INFO L226 Difference]: Without dead ends: 1861 [2021-12-15 23:01:10,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:01:10,031 INFO L933 BasicCegarLoop]: 423 mSDtfsCounter, 407 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1340 mSolverCounterSat, 325 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 1665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 1340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-15 23:01:10,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 496 Invalid, 1665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 1340 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-15 23:01:10,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1861 states. [2021-12-15 23:01:10,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1861 to 1857. [2021-12-15 23:01:10,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1857 states, 1856 states have (on average 1.4547413793103448) internal successors, (2700), 1856 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:01:10,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1857 states to 1857 states and 2700 transitions. [2021-12-15 23:01:10,088 INFO L78 Accepts]: Start accepts. Automaton has 1857 states and 2700 transitions. Word has length 130 [2021-12-15 23:01:10,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:01:10,091 INFO L470 AbstractCegarLoop]: Abstraction has 1857 states and 2700 transitions. [2021-12-15 23:01:10,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 2 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:01:10,091 INFO L276 IsEmpty]: Start isEmpty. Operand 1857 states and 2700 transitions. [2021-12-15 23:01:10,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-12-15 23:01:10,100 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:01:10,100 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 23:01:10,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 23:01:10,101 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:01:10,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:01:10,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1328526376, now seen corresponding path program 1 times [2021-12-15 23:01:10,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:01:10,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443898843] [2021-12-15 23:01:10,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:01:10,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:01:10,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:01:10,272 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:01:10,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:01:10,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443898843] [2021-12-15 23:01:10,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443898843] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:01:10,273 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:01:10,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 23:01:10,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160550790] [2021-12-15 23:01:10,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:01:10,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:01:10,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:01:10,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:01:10,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:01:10,275 INFO L87 Difference]: Start difference. First operand 1857 states and 2700 transitions. Second operand has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 2 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:01:13,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:01:13,064 INFO L93 Difference]: Finished difference Result 4591 states and 6640 transitions. [2021-12-15 23:01:13,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:01:13,065 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 2 states have internal predecessors, (170), 0 states have call successors, (0), 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 170 [2021-12-15 23:01:13,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:01:13,075 INFO L225 Difference]: With dead ends: 4591 [2021-12-15 23:01:13,075 INFO L226 Difference]: Without dead ends: 2736 [2021-12-15 23:01:13,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:01:13,079 INFO L933 BasicCegarLoop]: 475 mSDtfsCounter, 352 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1665 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 1763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-15 23:01:13,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [352 Valid, 537 Invalid, 1763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1665 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-15 23:01:13,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2736 states. [2021-12-15 23:01:13,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2736 to 2716. [2021-12-15 23:01:13,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2716 states, 2715 states have (on average 1.390791896869245) internal successors, (3776), 2715 states have internal predecessors, (3776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:01:13,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2716 states to 2716 states and 3776 transitions. [2021-12-15 23:01:13,128 INFO L78 Accepts]: Start accepts. Automaton has 2716 states and 3776 transitions. Word has length 170 [2021-12-15 23:01:13,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:01:13,128 INFO L470 AbstractCegarLoop]: Abstraction has 2716 states and 3776 transitions. [2021-12-15 23:01:13,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 2 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:01:13,129 INFO L276 IsEmpty]: Start isEmpty. Operand 2716 states and 3776 transitions. [2021-12-15 23:01:13,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-12-15 23:01:13,131 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:01:13,131 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:01:13,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 23:01:13,131 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:01:13,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:01:13,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1316134071, now seen corresponding path program 1 times [2021-12-15 23:01:13,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:01:13,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32783256] [2021-12-15 23:01:13,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:01:13,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:01:13,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:01:13,236 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:01:13,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:01:13,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32783256] [2021-12-15 23:01:13,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32783256] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:01:13,237 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:01:13,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:01:13,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634556287] [2021-12-15 23:01:13,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:01:13,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 23:01:13,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:01:13,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 23:01:13,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 23:01:13,239 INFO L87 Difference]: Start difference. First operand 2716 states and 3776 transitions. Second operand has 4 states, 4 states have (on average 44.0) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:01:15,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:01:15,578 INFO L93 Difference]: Finished difference Result 5012 states and 6951 transitions. [2021-12-15 23:01:15,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 23:01:15,579 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 44.0) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 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 176 [2021-12-15 23:01:15,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:01:15,588 INFO L225 Difference]: With dead ends: 5012 [2021-12-15 23:01:15,589 INFO L226 Difference]: Without dead ends: 2298 [2021-12-15 23:01:15,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 23:01:15,601 INFO L933 BasicCegarLoop]: 516 mSDtfsCounter, 746 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 1623 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 746 SdHoareTripleChecker+Valid, 935 SdHoareTripleChecker+Invalid, 1845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 1623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 23:01:15,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [746 Valid, 935 Invalid, 1845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 1623 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 23:01:15,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2298 states. [2021-12-15 23:01:15,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2298 to 2282. [2021-12-15 23:01:15,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2282 states, 2281 states have (on average 1.3726435773783427) internal successors, (3131), 2281 states have internal predecessors, (3131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:01:15,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2282 states to 2282 states and 3131 transitions. [2021-12-15 23:01:15,647 INFO L78 Accepts]: Start accepts. Automaton has 2282 states and 3131 transitions. Word has length 176 [2021-12-15 23:01:15,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:01:15,648 INFO L470 AbstractCegarLoop]: Abstraction has 2282 states and 3131 transitions. [2021-12-15 23:01:15,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.0) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:01:15,649 INFO L276 IsEmpty]: Start isEmpty. Operand 2282 states and 3131 transitions. [2021-12-15 23:01:15,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-12-15 23:01:15,651 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:01:15,651 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:01:15,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 23:01:15,652 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:01:15,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:01:15,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1991681526, now seen corresponding path program 1 times [2021-12-15 23:01:15,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:01:15,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634068162] [2021-12-15 23:01:15,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:01:15,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:01:15,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:01:15,821 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 125 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 23:01:15,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:01:15,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634068162] [2021-12-15 23:01:15,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634068162] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 23:01:15,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985350637] [2021-12-15 23:01:15,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:01:15,823 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 23:01:15,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 23:01:15,825 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 23:01:15,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 23:01:15,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:01:15,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 23:01:15,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 23:01:16,386 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-15 23:01:16,387 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 23:01:16,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985350637] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:01:16,388 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 23:01:16,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2021-12-15 23:01:16,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373877436] [2021-12-15 23:01:16,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:01:16,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:01:16,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:01:16,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:01:16,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-15 23:01:16,392 INFO L87 Difference]: Start difference. First operand 2282 states and 3131 transitions. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 2 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:01:18,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:01:18,363 INFO L93 Difference]: Finished difference Result 5850 states and 8323 transitions. [2021-12-15 23:01:18,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:01:18,363 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 2 states have internal predecessors, (137), 0 states have call successors, (0), 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 200 [2021-12-15 23:01:18,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:01:18,377 INFO L225 Difference]: With dead ends: 5850 [2021-12-15 23:01:18,377 INFO L226 Difference]: Without dead ends: 3995 [2021-12-15 23:01:18,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-15 23:01:18,381 INFO L933 BasicCegarLoop]: 516 mSDtfsCounter, 386 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-15 23:01:18,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 591 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-15 23:01:18,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3995 states. [2021-12-15 23:01:18,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3995 to 3142. [2021-12-15 23:01:18,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3142 states, 3141 states have (on average 1.274434893346068) internal successors, (4003), 3141 states have internal predecessors, (4003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:01:18,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3142 states to 3142 states and 4003 transitions. [2021-12-15 23:01:18,439 INFO L78 Accepts]: Start accepts. Automaton has 3142 states and 4003 transitions. Word has length 200 [2021-12-15 23:01:18,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:01:18,439 INFO L470 AbstractCegarLoop]: Abstraction has 3142 states and 4003 transitions. [2021-12-15 23:01:18,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 2 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:01:18,440 INFO L276 IsEmpty]: Start isEmpty. Operand 3142 states and 4003 transitions. [2021-12-15 23:01:18,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2021-12-15 23:01:18,442 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:01:18,443 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-15 23:01:18,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 23:01:18,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 23:01:18,648 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:01:18,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:01:18,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1925983828, now seen corresponding path program 1 times [2021-12-15 23:01:18,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:01:18,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681197752] [2021-12-15 23:01:18,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:01:18,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:01:18,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:01:18,751 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 189 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:01:18,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:01:18,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681197752] [2021-12-15 23:01:18,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681197752] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:01:18,752 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:01:18,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 23:01:18,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493322835] [2021-12-15 23:01:18,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:01:18,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 23:01:18,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:01:18,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 23:01:18,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 23:01:18,755 INFO L87 Difference]: Start difference. First operand 3142 states and 4003 transitions. Second operand has 5 states, 5 states have (on average 42.6) internal successors, (213), 5 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:01:21,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:01:21,236 INFO L93 Difference]: Finished difference Result 8024 states and 10527 transitions. [2021-12-15 23:01:21,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 23:01:21,236 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 42.6) internal successors, (213), 5 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 213 [2021-12-15 23:01:21,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:01:21,250 INFO L225 Difference]: With dead ends: 8024 [2021-12-15 23:01:21,251 INFO L226 Difference]: Without dead ends: 4884 [2021-12-15 23:01:21,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-15 23:01:21,257 INFO L933 BasicCegarLoop]: 760 mSDtfsCounter, 1684 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 1774 mSolverCounterSat, 1266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1684 SdHoareTripleChecker+Valid, 858 SdHoareTripleChecker+Invalid, 3040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1266 IncrementalHoareTripleChecker+Valid, 1774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-15 23:01:21,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1684 Valid, 858 Invalid, 3040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1266 Valid, 1774 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-15 23:01:21,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4884 states. [2021-12-15 23:01:21,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4884 to 4852. [2021-12-15 23:01:21,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4852 states, 4851 states have (on average 1.2665429808286952) internal successors, (6144), 4851 states have internal predecessors, (6144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:01:21,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4852 states to 4852 states and 6144 transitions. [2021-12-15 23:01:21,342 INFO L78 Accepts]: Start accepts. Automaton has 4852 states and 6144 transitions. Word has length 213 [2021-12-15 23:01:21,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:01:21,342 INFO L470 AbstractCegarLoop]: Abstraction has 4852 states and 6144 transitions. [2021-12-15 23:01:21,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.6) internal successors, (213), 5 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:01:21,343 INFO L276 IsEmpty]: Start isEmpty. Operand 4852 states and 6144 transitions. [2021-12-15 23:01:21,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-12-15 23:01:21,345 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:01:21,345 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:01:21,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 23:01:21,346 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:01:21,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:01:21,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1568238683, now seen corresponding path program 1 times [2021-12-15 23:01:21,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:01:21,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991576549] [2021-12-15 23:01:21,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:01:21,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:01:21,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:01:21,420 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-15 23:01:21,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:01:21,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991576549] [2021-12-15 23:01:21,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991576549] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:01:21,421 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:01:21,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:01:21,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876585184] [2021-12-15 23:01:21,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:01:21,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:01:21,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:01:21,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:01:21,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:01:21,423 INFO L87 Difference]: Start difference. First operand 4852 states and 6144 transitions. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:01:23,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:01:23,431 INFO L93 Difference]: Finished difference Result 12249 states and 15825 transitions. [2021-12-15 23:01:23,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:01:23,431 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 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 219 [2021-12-15 23:01:23,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:01:23,451 INFO L225 Difference]: With dead ends: 12249 [2021-12-15 23:01:23,451 INFO L226 Difference]: Without dead ends: 7399 [2021-12-15 23:01:23,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:01:23,458 INFO L933 BasicCegarLoop]: 481 mSDtfsCounter, 383 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 1339 mSolverCounterSat, 356 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 1695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 356 IncrementalHoareTripleChecker+Valid, 1339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-15 23:01:23,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [383 Valid, 545 Invalid, 1695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [356 Valid, 1339 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-15 23:01:23,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7399 states. [2021-12-15 23:01:23,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7399 to 4826. [2021-12-15 23:01:23,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4826 states, 4825 states have (on average 1.2652849740932643) internal successors, (6105), 4825 states have internal predecessors, (6105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:01:23,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4826 states to 4826 states and 6105 transitions. [2021-12-15 23:01:23,547 INFO L78 Accepts]: Start accepts. Automaton has 4826 states and 6105 transitions. Word has length 219 [2021-12-15 23:01:23,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:01:23,547 INFO L470 AbstractCegarLoop]: Abstraction has 4826 states and 6105 transitions. [2021-12-15 23:01:23,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:01:23,548 INFO L276 IsEmpty]: Start isEmpty. Operand 4826 states and 6105 transitions. [2021-12-15 23:01:23,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2021-12-15 23:01:23,550 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:01:23,550 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:01:23,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 23:01:23,551 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:01:23,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:01:23,552 INFO L85 PathProgramCache]: Analyzing trace with hash -124390713, now seen corresponding path program 1 times [2021-12-15 23:01:23,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:01:23,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835912299] [2021-12-15 23:01:23,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:01:23,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:01:23,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:01:23,624 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-15 23:01:23,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:01:23,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835912299] [2021-12-15 23:01:23,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835912299] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:01:23,625 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:01:23,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:01:23,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496477343] [2021-12-15 23:01:23,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:01:23,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:01:23,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:01:23,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:01:23,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:01:23,627 INFO L87 Difference]: Start difference. First operand 4826 states and 6105 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:01:25,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:01:25,671 INFO L93 Difference]: Finished difference Result 12204 states and 15757 transitions. [2021-12-15 23:01:25,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:01:25,672 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 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 232 [2021-12-15 23:01:25,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:01:25,696 INFO L225 Difference]: With dead ends: 12204 [2021-12-15 23:01:25,697 INFO L226 Difference]: Without dead ends: 7380 [2021-12-15 23:01:25,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:01:25,703 INFO L933 BasicCegarLoop]: 459 mSDtfsCounter, 407 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1398 mSolverCounterSat, 360 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 1758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 360 IncrementalHoareTripleChecker+Valid, 1398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-15 23:01:25,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 511 Invalid, 1758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [360 Valid, 1398 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-15 23:01:25,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7380 states. [2021-12-15 23:01:25,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7380 to 6525. [2021-12-15 23:01:25,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6525 states, 6524 states have (on average 1.2665542611894542) internal successors, (8263), 6524 states have internal predecessors, (8263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:01:25,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6525 states to 6525 states and 8263 transitions. [2021-12-15 23:01:25,800 INFO L78 Accepts]: Start accepts. Automaton has 6525 states and 8263 transitions. Word has length 232 [2021-12-15 23:01:25,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:01:25,800 INFO L470 AbstractCegarLoop]: Abstraction has 6525 states and 8263 transitions. [2021-12-15 23:01:25,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:01:25,801 INFO L276 IsEmpty]: Start isEmpty. Operand 6525 states and 8263 transitions. [2021-12-15 23:01:25,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2021-12-15 23:01:25,805 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:01:25,805 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:01:25,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 23:01:25,806 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:01:25,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:01:25,806 INFO L85 PathProgramCache]: Analyzing trace with hash 2119577355, now seen corresponding path program 1 times [2021-12-15 23:01:25,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:01:25,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669561151] [2021-12-15 23:01:25,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:01:25,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:01:25,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:01:25,901 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-15 23:01:25,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:01:25,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669561151] [2021-12-15 23:01:25,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669561151] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:01:25,905 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:01:25,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:01:25,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422024797] [2021-12-15 23:01:25,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:01:25,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:01:25,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:01:25,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:01:25,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:01:25,908 INFO L87 Difference]: Start difference. First operand 6525 states and 8263 transitions. Second operand has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:01:28,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:01:28,030 INFO L93 Difference]: Finished difference Result 17751 states and 22351 transitions. [2021-12-15 23:01:28,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:01:28,031 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 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 281 [2021-12-15 23:01:28,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:01:28,048 INFO L225 Difference]: With dead ends: 17751 [2021-12-15 23:01:28,048 INFO L226 Difference]: Without dead ends: 9951 [2021-12-15 23:01:28,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:01:28,057 INFO L933 BasicCegarLoop]: 946 mSDtfsCounter, 435 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1484 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 1019 SdHoareTripleChecker+Invalid, 1732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 1484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-15 23:01:28,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [435 Valid, 1019 Invalid, 1732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 1484 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-15 23:01:28,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9951 states. [2021-12-15 23:01:28,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9951 to 9943. [2021-12-15 23:01:28,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9943 states, 9942 states have (on average 1.208006437336552) internal successors, (12010), 9942 states have internal predecessors, (12010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:01:28,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9943 states to 9943 states and 12010 transitions. [2021-12-15 23:01:28,192 INFO L78 Accepts]: Start accepts. Automaton has 9943 states and 12010 transitions. Word has length 281 [2021-12-15 23:01:28,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:01:28,193 INFO L470 AbstractCegarLoop]: Abstraction has 9943 states and 12010 transitions. [2021-12-15 23:01:28,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:01:28,194 INFO L276 IsEmpty]: Start isEmpty. Operand 9943 states and 12010 transitions. [2021-12-15 23:01:28,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2021-12-15 23:01:28,198 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:01:28,198 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:01:28,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 23:01:28,198 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:01:28,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:01:28,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1846468523, now seen corresponding path program 1 times [2021-12-15 23:01:28,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:01:28,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639541217] [2021-12-15 23:01:28,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:01:28,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:01:28,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:01:28,295 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-15 23:01:28,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:01:28,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639541217] [2021-12-15 23:01:28,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639541217] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:01:28,296 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:01:28,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:01:28,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813947854] [2021-12-15 23:01:28,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:01:28,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:01:28,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:01:28,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:01:28,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:01:28,298 INFO L87 Difference]: Start difference. First operand 9943 states and 12010 transitions. Second operand has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:01:30,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:01:30,148 INFO L93 Difference]: Finished difference Result 20736 states and 24968 transitions. [2021-12-15 23:01:30,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:01:30,149 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 285 [2021-12-15 23:01:30,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:01:30,167 INFO L225 Difference]: With dead ends: 20736 [2021-12-15 23:01:30,167 INFO L226 Difference]: Without dead ends: 10795 [2021-12-15 23:01:30,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:01:30,176 INFO L933 BasicCegarLoop]: 923 mSDtfsCounter, 365 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1386 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 985 SdHoareTripleChecker+Invalid, 1431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-15 23:01:30,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 985 Invalid, 1431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1386 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-15 23:01:30,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10795 states. [2021-12-15 23:01:30,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10795 to 10369. [2021-12-15 23:01:30,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10369 states, 10368 states have (on average 1.2040895061728396) internal successors, (12484), 10368 states have internal predecessors, (12484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:01:30,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10369 states to 10369 states and 12484 transitions. [2021-12-15 23:01:30,315 INFO L78 Accepts]: Start accepts. Automaton has 10369 states and 12484 transitions. Word has length 285 [2021-12-15 23:01:30,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:01:30,315 INFO L470 AbstractCegarLoop]: Abstraction has 10369 states and 12484 transitions. [2021-12-15 23:01:30,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:01:30,316 INFO L276 IsEmpty]: Start isEmpty. Operand 10369 states and 12484 transitions. [2021-12-15 23:01:30,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2021-12-15 23:01:30,320 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:01:30,320 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:01:30,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 23:01:30,321 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:01:30,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:01:30,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1006453074, now seen corresponding path program 1 times [2021-12-15 23:01:30,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:01:30,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138149208] [2021-12-15 23:01:30,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:01:30,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:01:30,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:01:30,445 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 264 proven. 70 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-15 23:01:30,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:01:30,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138149208] [2021-12-15 23:01:30,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138149208] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 23:01:30,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796229463] [2021-12-15 23:01:30,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:01:30,447 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 23:01:30,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 23:01:30,452 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 23:01:30,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 23:01:30,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:01:30,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 23:01:30,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 23:01:31,398 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 264 proven. 70 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-15 23:01:31,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 23:01:32,030 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 334 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-15 23:01:32,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796229463] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-15 23:01:32,030 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-15 23:01:32,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2021-12-15 23:01:32,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909375599] [2021-12-15 23:01:32,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:01:32,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 23:01:32,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:01:32,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 23:01:32,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-15 23:01:32,033 INFO L87 Difference]: Start difference. First operand 10369 states and 12484 transitions. Second operand has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:01:35,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:01:35,100 INFO L93 Difference]: Finished difference Result 30985 states and 37761 transitions. [2021-12-15 23:01:35,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 23:01:35,100 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 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 289 [2021-12-15 23:01:35,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:01:35,135 INFO L225 Difference]: With dead ends: 30985 [2021-12-15 23:01:35,136 INFO L226 Difference]: Without dead ends: 19753 [2021-12-15 23:01:35,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 579 GetRequests, 573 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-15 23:01:35,150 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 909 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 2301 mSolverCounterSat, 797 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 909 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 3098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 797 IncrementalHoareTripleChecker+Valid, 2301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-15 23:01:35,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [909 Valid, 157 Invalid, 3098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [797 Valid, 2301 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-15 23:01:35,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19753 states. [2021-12-15 23:01:35,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19753 to 19752. [2021-12-15 23:01:35,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19752 states, 19751 states have (on average 1.158321097665941) internal successors, (22878), 19751 states have internal predecessors, (22878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:01:35,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19752 states to 19752 states and 22878 transitions. [2021-12-15 23:01:35,397 INFO L78 Accepts]: Start accepts. Automaton has 19752 states and 22878 transitions. Word has length 289 [2021-12-15 23:01:35,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:01:35,397 INFO L470 AbstractCegarLoop]: Abstraction has 19752 states and 22878 transitions. [2021-12-15 23:01:35,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:01:35,398 INFO L276 IsEmpty]: Start isEmpty. Operand 19752 states and 22878 transitions. [2021-12-15 23:01:35,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2021-12-15 23:01:35,403 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:01:35,403 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:01:35,431 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-15 23:01:35,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-15 23:01:35,620 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:01:35,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:01:35,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1484098234, now seen corresponding path program 1 times [2021-12-15 23:01:35,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:01:35,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10539139] [2021-12-15 23:01:35,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:01:35,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:01:35,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:01:35,768 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 331 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-15 23:01:35,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:01:35,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10539139] [2021-12-15 23:01:35,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10539139] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:01:35,769 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:01:35,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:01:35,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809660308] [2021-12-15 23:01:35,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:01:35,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:01:35,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:01:35,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:01:35,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:01:35,771 INFO L87 Difference]: Start difference. First operand 19752 states and 22878 transitions. Second operand has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:01:37,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:01:37,482 INFO L93 Difference]: Finished difference Result 42479 states and 49308 transitions. [2021-12-15 23:01:37,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:01:37,482 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 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 302 [2021-12-15 23:01:37,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:01:37,513 INFO L225 Difference]: With dead ends: 42479 [2021-12-15 23:01:37,513 INFO L226 Difference]: Without dead ends: 22303 [2021-12-15 23:01:37,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:01:37,532 INFO L933 BasicCegarLoop]: 791 mSDtfsCounter, 376 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1199 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 858 SdHoareTripleChecker+Invalid, 1409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 1199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-15 23:01:37,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [376 Valid, 858 Invalid, 1409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 1199 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-15 23:01:37,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22303 states. [2021-12-15 23:01:37,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22303 to 22303. [2021-12-15 23:01:37,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22303 states, 22302 states have (on average 1.1397184109048515) internal successors, (25418), 22302 states have internal predecessors, (25418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:01:37,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22303 states to 22303 states and 25418 transitions. [2021-12-15 23:01:37,906 INFO L78 Accepts]: Start accepts. Automaton has 22303 states and 25418 transitions. Word has length 302 [2021-12-15 23:01:37,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:01:37,907 INFO L470 AbstractCegarLoop]: Abstraction has 22303 states and 25418 transitions. [2021-12-15 23:01:37,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:01:37,907 INFO L276 IsEmpty]: Start isEmpty. Operand 22303 states and 25418 transitions. [2021-12-15 23:01:37,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2021-12-15 23:01:37,913 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:01:37,913 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:01:37,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 23:01:37,914 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:01:37,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:01:37,915 INFO L85 PathProgramCache]: Analyzing trace with hash 713392754, now seen corresponding path program 1 times [2021-12-15 23:01:37,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:01:37,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500951050] [2021-12-15 23:01:37,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:01:37,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:01:37,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:01:38,073 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-15 23:01:38,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:01:38,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500951050] [2021-12-15 23:01:38,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500951050] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:01:38,074 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:01:38,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:01:38,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580233894] [2021-12-15 23:01:38,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:01:38,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:01:38,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:01:38,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:01:38,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:01:38,076 INFO L87 Difference]: Start difference. First operand 22303 states and 25418 transitions. Second operand has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:01:39,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:01:39,812 INFO L93 Difference]: Finished difference Result 54807 states and 62211 transitions. [2021-12-15 23:01:39,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:01:39,813 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 342 [2021-12-15 23:01:39,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:01:39,852 INFO L225 Difference]: With dead ends: 54807 [2021-12-15 23:01:39,852 INFO L226 Difference]: Without dead ends: 29501 [2021-12-15 23:01:39,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:01:39,871 INFO L933 BasicCegarLoop]: 571 mSDtfsCounter, 488 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 1164 mSolverCounterSat, 339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 1503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 1164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-15 23:01:39,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [488 Valid, 597 Invalid, 1503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [339 Valid, 1164 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-15 23:01:39,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29501 states. [2021-12-15 23:01:40,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29501 to 26944. [2021-12-15 23:01:40,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26944 states, 26943 states have (on average 1.115094829825929) internal successors, (30044), 26943 states have internal predecessors, (30044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:01:40,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26944 states to 26944 states and 30044 transitions. [2021-12-15 23:01:40,305 INFO L78 Accepts]: Start accepts. Automaton has 26944 states and 30044 transitions. Word has length 342 [2021-12-15 23:01:40,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:01:40,306 INFO L470 AbstractCegarLoop]: Abstraction has 26944 states and 30044 transitions. [2021-12-15 23:01:40,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:01:40,306 INFO L276 IsEmpty]: Start isEmpty. Operand 26944 states and 30044 transitions. [2021-12-15 23:01:40,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 624 [2021-12-15 23:01:40,329 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:01:40,330 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:01:40,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 23:01:40,330 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:01:40,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:01:40,331 INFO L85 PathProgramCache]: Analyzing trace with hash 711598154, now seen corresponding path program 1 times [2021-12-15 23:01:40,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:01:40,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014267920] [2021-12-15 23:01:40,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:01:40,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:01:40,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:01:40,499 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 503 proven. 0 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2021-12-15 23:01:40,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:01:40,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014267920] [2021-12-15 23:01:40,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014267920] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:01:40,500 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:01:40,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:01:40,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167830391] [2021-12-15 23:01:40,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:01:40,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:01:40,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:01:40,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:01:40,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:01:40,504 INFO L87 Difference]: Start difference. First operand 26944 states and 30044 transitions. Second operand has 3 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:01:42,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:01:42,204 INFO L93 Difference]: Finished difference Result 58990 states and 66161 transitions. [2021-12-15 23:01:42,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:01:42,204 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 0 states have call successors, (0), 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 623 [2021-12-15 23:01:42,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:01:42,246 INFO L225 Difference]: With dead ends: 58990 [2021-12-15 23:01:42,246 INFO L226 Difference]: Without dead ends: 32048 [2021-12-15 23:01:42,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:01:42,260 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 478 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 1188 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 1390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 1188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-15 23:01:42,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [478 Valid, 189 Invalid, 1390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 1188 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-15 23:01:42,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32048 states. [2021-12-15 23:01:42,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32048 to 25214. [2021-12-15 23:01:42,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25214 states, 25213 states have (on average 1.1153769880617141) internal successors, (28122), 25213 states have internal predecessors, (28122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:01:42,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25214 states to 25214 states and 28122 transitions. [2021-12-15 23:01:42,595 INFO L78 Accepts]: Start accepts. Automaton has 25214 states and 28122 transitions. Word has length 623 [2021-12-15 23:01:42,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:01:42,596 INFO L470 AbstractCegarLoop]: Abstraction has 25214 states and 28122 transitions. [2021-12-15 23:01:42,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:01:42,597 INFO L276 IsEmpty]: Start isEmpty. Operand 25214 states and 28122 transitions. [2021-12-15 23:01:42,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 638 [2021-12-15 23:01:42,617 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:01:42,617 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:01:42,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-15 23:01:42,618 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:01:42,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:01:42,618 INFO L85 PathProgramCache]: Analyzing trace with hash -136532569, now seen corresponding path program 1 times [2021-12-15 23:01:42,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:01:42,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259827722] [2021-12-15 23:01:42,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:01:42,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:01:42,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:01:42,938 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 344 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-12-15 23:01:42,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:01:42,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259827722] [2021-12-15 23:01:42,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259827722] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:01:42,939 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:01:42,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:01:42,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643997144] [2021-12-15 23:01:42,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:01:42,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:01:42,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:01:42,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:01:42,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:01:42,942 INFO L87 Difference]: Start difference. First operand 25214 states and 28122 transitions. Second operand has 3 states, 3 states have (on average 188.33333333333334) internal successors, (565), 3 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:01:44,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:01:44,312 INFO L93 Difference]: Finished difference Result 58935 states and 65837 transitions. [2021-12-15 23:01:44,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:01:44,312 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 188.33333333333334) internal successors, (565), 3 states have internal predecessors, (565), 0 states have call successors, (0), 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 637 [2021-12-15 23:01:44,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:01:44,346 INFO L225 Difference]: With dead ends: 58935 [2021-12-15 23:01:44,346 INFO L226 Difference]: Without dead ends: 33723 [2021-12-15 23:01:44,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:01:44,366 INFO L933 BasicCegarLoop]: 673 mSDtfsCounter, 45 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1112 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 1275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 1112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-15 23:01:44,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 720 Invalid, 1275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 1112 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-15 23:01:44,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33723 states. [2021-12-15 23:01:44,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33723 to 29033. [2021-12-15 23:01:44,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29033 states, 29032 states have (on average 1.1043331496279967) internal successors, (32061), 29032 states have internal predecessors, (32061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:01:44,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29033 states to 29033 states and 32061 transitions. [2021-12-15 23:01:44,761 INFO L78 Accepts]: Start accepts. Automaton has 29033 states and 32061 transitions. Word has length 637 [2021-12-15 23:01:44,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:01:44,762 INFO L470 AbstractCegarLoop]: Abstraction has 29033 states and 32061 transitions. [2021-12-15 23:01:44,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 188.33333333333334) internal successors, (565), 3 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:01:44,762 INFO L276 IsEmpty]: Start isEmpty. Operand 29033 states and 32061 transitions. [2021-12-15 23:01:44,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 643 [2021-12-15 23:01:44,802 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:01:44,803 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:01:44,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-15 23:01:44,803 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:01:44,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:01:44,804 INFO L85 PathProgramCache]: Analyzing trace with hash 255466079, now seen corresponding path program 1 times [2021-12-15 23:01:44,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:01:44,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445208945] [2021-12-15 23:01:44,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:01:44,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:01:44,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:01:45,020 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 286 proven. 78 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-15 23:01:45,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:01:45,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445208945] [2021-12-15 23:01:45,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445208945] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 23:01:45,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242767459] [2021-12-15 23:01:45,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:01:45,022 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 23:01:45,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 23:01:45,023 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 23:01:45,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 23:01:45,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:01:45,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 791 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 23:01:45,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 23:01:46,391 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 286 proven. 78 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-15 23:01:46,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 23:01:47,508 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 364 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-15 23:01:47,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242767459] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-15 23:01:47,509 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-15 23:01:47,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2021-12-15 23:01:47,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678867168] [2021-12-15 23:01:47,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:01:47,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 23:01:47,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:01:47,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 23:01:47,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-15 23:01:47,512 INFO L87 Difference]: Start difference. First operand 29033 states and 32061 transitions. Second operand has 4 states, 4 states have (on average 145.0) internal successors, (580), 3 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:01:49,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:01:49,963 INFO L93 Difference]: Finished difference Result 69566 states and 77103 transitions. [2021-12-15 23:01:49,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 23:01:49,963 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 145.0) internal successors, (580), 3 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 642 [2021-12-15 23:01:49,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:01:50,003 INFO L225 Difference]: With dead ends: 69566 [2021-12-15 23:01:50,003 INFO L226 Difference]: Without dead ends: 40535 [2021-12-15 23:01:50,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1285 GetRequests, 1279 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-15 23:01:50,029 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 817 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 2219 mSolverCounterSat, 405 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 817 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 2624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 405 IncrementalHoareTripleChecker+Valid, 2219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 23:01:50,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [817 Valid, 195 Invalid, 2624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [405 Valid, 2219 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 23:01:50,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40535 states. [2021-12-15 23:01:50,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40535 to 38833. [2021-12-15 23:01:50,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38833 states, 38832 states have (on average 1.111042439225381) internal successors, (43144), 38832 states have internal predecessors, (43144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:01:50,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38833 states to 38833 states and 43144 transitions. [2021-12-15 23:01:50,467 INFO L78 Accepts]: Start accepts. Automaton has 38833 states and 43144 transitions. Word has length 642 [2021-12-15 23:01:50,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:01:50,467 INFO L470 AbstractCegarLoop]: Abstraction has 38833 states and 43144 transitions. [2021-12-15 23:01:50,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 145.0) internal successors, (580), 3 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:01:50,467 INFO L276 IsEmpty]: Start isEmpty. Operand 38833 states and 43144 transitions. [2021-12-15 23:01:50,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 768 [2021-12-15 23:01:50,496 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:01:50,497 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:01:50,514 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-15 23:01:50,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 23:01:50,698 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:01:50,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:01:50,698 INFO L85 PathProgramCache]: Analyzing trace with hash -2003824354, now seen corresponding path program 1 times [2021-12-15 23:01:50,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:01:50,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587550374] [2021-12-15 23:01:50,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:01:50,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:01:50,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:01:51,158 INFO L134 CoverageAnalysis]: Checked inductivity of 776 backedges. 251 proven. 0 refuted. 0 times theorem prover too weak. 525 trivial. 0 not checked. [2021-12-15 23:01:51,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:01:51,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587550374] [2021-12-15 23:01:51,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587550374] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:01:51,159 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:01:51,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:01:51,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670087986] [2021-12-15 23:01:51,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:01:51,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:01:51,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:01:51,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:01:51,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:01:51,162 INFO L87 Difference]: Start difference. First operand 38833 states and 43144 transitions. Second operand has 3 states, 3 states have (on average 161.33333333333334) internal successors, (484), 3 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)