./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.01.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.01.cil-1.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 1bc25ea26c5b0a3f713e59ee991d97185223a272bca137eca8d49c3babbebcf9 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 16:15:49,179 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 16:15:49,181 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 16:15:49,237 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 16:15:49,238 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 16:15:49,238 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 16:15:49,239 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 16:15:49,241 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 16:15:49,242 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 16:15:49,242 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 16:15:49,243 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 16:15:49,244 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 16:15:49,244 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 16:15:49,245 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 16:15:49,246 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 16:15:49,247 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 16:15:49,248 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 16:15:49,248 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 16:15:49,250 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 16:15:49,252 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 16:15:49,258 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 16:15:49,260 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 16:15:49,261 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 16:15:49,262 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 16:15:49,264 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 16:15:49,271 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 16:15:49,272 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 16:15:49,272 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 16:15:49,274 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 16:15:49,275 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 16:15:49,275 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 16:15:49,276 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 16:15:49,277 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 16:15:49,278 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 16:15:49,279 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 16:15:49,281 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 16:15:49,282 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 16:15:49,282 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 16:15:49,282 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 16:15:49,283 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 16:15:49,284 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 16:15:49,285 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 16:15:49,305 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 16:15:49,306 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 16:15:49,306 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 16:15:49,306 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 16:15:49,307 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 16:15:49,307 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 16:15:49,308 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 16:15:49,308 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 16:15:49,308 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 16:15:49,308 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 16:15:49,309 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 16:15:49,309 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 16:15:49,309 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 16:15:49,309 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 16:15:49,310 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 16:15:49,310 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 16:15:49,310 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 16:15:49,310 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 16:15:49,310 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 16:15:49,310 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 16:15:49,310 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 16:15:49,311 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 16:15:49,311 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 16:15:49,311 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 16:15:49,311 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:15:49,311 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 16:15:49,311 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 16:15:49,312 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 16:15:49,312 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 16:15:49,312 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 16:15:49,312 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 16:15:49,312 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 16:15:49,313 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 16:15:49,313 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 16:15:49,313 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1bc25ea26c5b0a3f713e59ee991d97185223a272bca137eca8d49c3babbebcf9 [2021-12-14 16:15:49,539 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 16:15:49,558 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 16:15:49,560 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 16:15:49,561 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 16:15:49,561 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 16:15:49,562 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.01.cil-1.c [2021-12-14 16:15:49,613 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d62fd4e3/4a8eb9b6e6cd4a37af99e4301c37c333/FLAGcfa85261c [2021-12-14 16:15:49,980 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 16:15:49,980 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.01.cil-1.c [2021-12-14 16:15:49,991 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d62fd4e3/4a8eb9b6e6cd4a37af99e4301c37c333/FLAGcfa85261c [2021-12-14 16:15:50,004 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d62fd4e3/4a8eb9b6e6cd4a37af99e4301c37c333 [2021-12-14 16:15:50,007 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 16:15:50,008 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 16:15:50,010 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 16:15:50,010 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 16:15:50,013 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 16:15:50,013 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:15:50" (1/1) ... [2021-12-14 16:15:50,014 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@89bb862 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:15:50, skipping insertion in model container [2021-12-14 16:15:50,014 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:15:50" (1/1) ... [2021-12-14 16:15:50,019 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 16:15:50,051 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 16:15:50,193 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.01.cil-1.c[913,926] [2021-12-14 16:15:50,239 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.01.cil-1.c[5977,5990] [2021-12-14 16:15:50,265 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:15:50,272 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 16:15:50,281 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.01.cil-1.c[913,926] [2021-12-14 16:15:50,304 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.01.cil-1.c[5977,5990] [2021-12-14 16:15:50,314 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:15:50,328 INFO L208 MainTranslator]: Completed translation [2021-12-14 16:15:50,329 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:15:50 WrapperNode [2021-12-14 16:15:50,329 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 16:15:50,330 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 16:15:50,330 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 16:15:50,330 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 16:15:50,334 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:15:50" (1/1) ... [2021-12-14 16:15:50,348 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:15:50" (1/1) ... [2021-12-14 16:15:50,381 INFO L137 Inliner]: procedures = 50, calls = 51, calls flagged for inlining = 25, calls inlined = 25, statements flattened = 417 [2021-12-14 16:15:50,383 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 16:15:50,384 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 16:15:50,384 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 16:15:50,384 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 16:15:50,390 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:15:50" (1/1) ... [2021-12-14 16:15:50,390 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:15:50" (1/1) ... [2021-12-14 16:15:50,399 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:15:50" (1/1) ... [2021-12-14 16:15:50,400 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:15:50" (1/1) ... [2021-12-14 16:15:50,405 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:15:50" (1/1) ... [2021-12-14 16:15:50,410 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:15:50" (1/1) ... [2021-12-14 16:15:50,411 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:15:50" (1/1) ... [2021-12-14 16:15:50,413 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 16:15:50,414 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 16:15:50,414 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 16:15:50,414 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 16:15:50,415 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:15:50" (1/1) ... [2021-12-14 16:15:50,420 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:15:50,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:15:50,438 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-14 16:15:50,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-14 16:15:50,466 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 16:15:50,467 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-14 16:15:50,467 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-14 16:15:50,467 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2021-12-14 16:15:50,468 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2021-12-14 16:15:50,468 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-14 16:15:50,468 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-14 16:15:50,468 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-14 16:15:50,468 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-14 16:15:50,468 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-14 16:15:50,469 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-14 16:15:50,469 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-14 16:15:50,469 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-14 16:15:50,469 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-14 16:15:50,469 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-14 16:15:50,469 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 16:15:50,469 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-14 16:15:50,469 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-14 16:15:50,469 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 16:15:50,470 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 16:15:50,470 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-14 16:15:50,470 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-14 16:15:50,569 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 16:15:50,573 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 16:15:50,855 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 16:15:50,863 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 16:15:50,864 INFO L301 CfgBuilder]: Removed 8 assume(true) statements. [2021-12-14 16:15:50,866 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:15:50 BoogieIcfgContainer [2021-12-14 16:15:50,867 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 16:15:50,868 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 16:15:50,869 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 16:15:50,871 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 16:15:50,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 04:15:50" (1/3) ... [2021-12-14 16:15:50,872 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7be22361 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:15:50, skipping insertion in model container [2021-12-14 16:15:50,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:15:50" (2/3) ... [2021-12-14 16:15:50,873 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7be22361 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:15:50, skipping insertion in model container [2021-12-14 16:15:50,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:15:50" (3/3) ... [2021-12-14 16:15:50,874 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.01.cil-1.c [2021-12-14 16:15:50,878 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 16:15:50,878 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-14 16:15:50,923 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 16:15:50,929 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-14 16:15:50,929 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-14 16:15:50,947 INFO L276 IsEmpty]: Start isEmpty. Operand has 179 states, 146 states have (on average 1.5410958904109588) internal successors, (225), 151 states have internal predecessors, (225), 21 states have call successors, (21), 9 states have call predecessors, (21), 9 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-12-14 16:15:50,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-14 16:15:50,957 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:15:50,958 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] [2021-12-14 16:15:50,958 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:15:50,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:15:50,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1946471914, now seen corresponding path program 1 times [2021-12-14 16:15:50,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:15:50,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551756561] [2021-12-14 16:15:50,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:15:50,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:15:51,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:51,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:15:51,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:51,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-14 16:15:51,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:51,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:15:51,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:15:51,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551756561] [2021-12-14 16:15:51,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551756561] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:15:51,192 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:15:51,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 16:15:51,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69211140] [2021-12-14 16:15:51,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:15:51,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 16:15:51,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:15:51,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 16:15:51,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 16:15:51,228 INFO L87 Difference]: Start difference. First operand has 179 states, 146 states have (on average 1.5410958904109588) internal successors, (225), 151 states have internal predecessors, (225), 21 states have call successors, (21), 9 states have call predecessors, (21), 9 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 16:15:51,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:15:51,516 INFO L93 Difference]: Finished difference Result 414 states and 624 transitions. [2021-12-14 16:15:51,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 16:15:51,519 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2021-12-14 16:15:51,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:15:51,532 INFO L225 Difference]: With dead ends: 414 [2021-12-14 16:15:51,532 INFO L226 Difference]: Without dead ends: 239 [2021-12-14 16:15:51,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:15:51,541 INFO L933 BasicCegarLoop]: 265 mSDtfsCounter, 284 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 16:15:51,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 471 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 16:15:51,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-12-14 16:15:51,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 233. [2021-12-14 16:15:51,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 195 states have (on average 1.405128205128205) internal successors, (274), 199 states have internal predecessors, (274), 25 states have call successors, (25), 11 states have call predecessors, (25), 11 states have return successors, (29), 23 states have call predecessors, (29), 23 states have call successors, (29) [2021-12-14 16:15:51,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 328 transitions. [2021-12-14 16:15:51,613 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 328 transitions. Word has length 44 [2021-12-14 16:15:51,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:15:51,613 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 328 transitions. [2021-12-14 16:15:51,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 16:15:51,614 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 328 transitions. [2021-12-14 16:15:51,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-14 16:15:51,620 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:15:51,620 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] [2021-12-14 16:15:51,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 16:15:51,621 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:15:51,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:15:51,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1644174286, now seen corresponding path program 1 times [2021-12-14 16:15:51,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:15:51,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103541160] [2021-12-14 16:15:51,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:15:51,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:15:51,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:51,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:15:51,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:51,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-14 16:15:51,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:51,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:15:51,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:15:51,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103541160] [2021-12-14 16:15:51,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103541160] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:15:51,692 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:15:51,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 16:15:51,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279622022] [2021-12-14 16:15:51,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:15:51,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 16:15:51,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:15:51,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 16:15:51,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 16:15:51,694 INFO L87 Difference]: Start difference. First operand 233 states and 328 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 16:15:51,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:15:51,865 INFO L93 Difference]: Finished difference Result 481 states and 668 transitions. [2021-12-14 16:15:51,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 16:15:51,869 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2021-12-14 16:15:51,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:15:51,873 INFO L225 Difference]: With dead ends: 481 [2021-12-14 16:15:51,873 INFO L226 Difference]: Without dead ends: 357 [2021-12-14 16:15:51,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:15:51,878 INFO L933 BasicCegarLoop]: 283 mSDtfsCounter, 148 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 585 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 16:15:51,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 585 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 16:15:51,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-12-14 16:15:51,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 300. [2021-12-14 16:15:51,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 256 states have (on average 1.3984375) internal successors, (358), 260 states have internal predecessors, (358), 28 states have call successors, (28), 14 states have call predecessors, (28), 14 states have return successors, (32), 26 states have call predecessors, (32), 26 states have call successors, (32) [2021-12-14 16:15:51,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 418 transitions. [2021-12-14 16:15:51,901 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 418 transitions. Word has length 45 [2021-12-14 16:15:51,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:15:51,901 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 418 transitions. [2021-12-14 16:15:51,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 16:15:51,902 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 418 transitions. [2021-12-14 16:15:51,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-14 16:15:51,905 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:15:51,905 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] [2021-12-14 16:15:51,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 16:15:51,906 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:15:51,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:15:51,906 INFO L85 PathProgramCache]: Analyzing trace with hash 359816825, now seen corresponding path program 1 times [2021-12-14 16:15:51,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:15:51,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904719088] [2021-12-14 16:15:51,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:15:51,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:15:51,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:51,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:15:51,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:51,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-14 16:15:51,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:51,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:15:51,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:15:51,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904719088] [2021-12-14 16:15:51,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904719088] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:15:51,972 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:15:51,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 16:15:51,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894063813] [2021-12-14 16:15:51,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:15:51,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 16:15:51,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:15:51,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 16:15:51,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 16:15:51,974 INFO L87 Difference]: Start difference. First operand 300 states and 418 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 16:15:52,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:15:52,112 INFO L93 Difference]: Finished difference Result 708 states and 977 transitions. [2021-12-14 16:15:52,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 16:15:52,113 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2021-12-14 16:15:52,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:15:52,116 INFO L225 Difference]: With dead ends: 708 [2021-12-14 16:15:52,116 INFO L226 Difference]: Without dead ends: 517 [2021-12-14 16:15:52,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:15:52,122 INFO L933 BasicCegarLoop]: 258 mSDtfsCounter, 293 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 16:15:52,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [308 Valid, 464 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 16:15:52,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-12-14 16:15:52,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 465. [2021-12-14 16:15:52,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 402 states have (on average 1.36318407960199) internal successors, (548), 409 states have internal predecessors, (548), 39 states have call successors, (39), 21 states have call predecessors, (39), 22 states have return successors, (49), 35 states have call predecessors, (49), 37 states have call successors, (49) [2021-12-14 16:15:52,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 636 transitions. [2021-12-14 16:15:52,159 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 636 transitions. Word has length 45 [2021-12-14 16:15:52,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:15:52,159 INFO L470 AbstractCegarLoop]: Abstraction has 465 states and 636 transitions. [2021-12-14 16:15:52,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 16:15:52,160 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 636 transitions. [2021-12-14 16:15:52,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-14 16:15:52,160 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:15:52,161 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] [2021-12-14 16:15:52,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 16:15:52,161 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:15:52,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:15:52,161 INFO L85 PathProgramCache]: Analyzing trace with hash -443803124, now seen corresponding path program 1 times [2021-12-14 16:15:52,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:15:52,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779218850] [2021-12-14 16:15:52,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:15:52,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:15:52,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:52,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:15:52,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:52,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 16:15:52,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:52,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 16:15:52,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:52,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-14 16:15:52,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:52,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 16:15:52,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:52,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:15:52,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:15:52,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779218850] [2021-12-14 16:15:52,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779218850] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:15:52,234 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:15:52,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:15:52,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833135072] [2021-12-14 16:15:52,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:15:52,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 16:15:52,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:15:52,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 16:15:52,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:15:52,236 INFO L87 Difference]: Start difference. First operand 465 states and 636 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:15:52,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:15:52,538 INFO L93 Difference]: Finished difference Result 582 states and 808 transitions. [2021-12-14 16:15:52,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:15:52,539 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 57 [2021-12-14 16:15:52,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:15:52,542 INFO L225 Difference]: With dead ends: 582 [2021-12-14 16:15:52,542 INFO L226 Difference]: Without dead ends: 486 [2021-12-14 16:15:52,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:15:52,548 INFO L933 BasicCegarLoop]: 243 mSDtfsCounter, 263 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 16:15:52,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [276 Valid, 527 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 16:15:52,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-12-14 16:15:52,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 465. [2021-12-14 16:15:52,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 402 states have (on average 1.3606965174129353) internal successors, (547), 409 states have internal predecessors, (547), 39 states have call successors, (39), 21 states have call predecessors, (39), 22 states have return successors, (49), 35 states have call predecessors, (49), 37 states have call successors, (49) [2021-12-14 16:15:52,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 635 transitions. [2021-12-14 16:15:52,572 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 635 transitions. Word has length 57 [2021-12-14 16:15:52,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:15:52,573 INFO L470 AbstractCegarLoop]: Abstraction has 465 states and 635 transitions. [2021-12-14 16:15:52,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:15:52,574 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 635 transitions. [2021-12-14 16:15:52,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-14 16:15:52,577 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:15:52,577 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] [2021-12-14 16:15:52,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 16:15:52,578 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:15:52,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:15:52,578 INFO L85 PathProgramCache]: Analyzing trace with hash -428284406, now seen corresponding path program 1 times [2021-12-14 16:15:52,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:15:52,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273150916] [2021-12-14 16:15:52,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:15:52,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:15:52,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:52,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:15:52,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:52,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 16:15:52,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:52,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 16:15:52,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:52,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-14 16:15:52,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:52,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 16:15:52,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:52,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:15:52,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:15:52,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273150916] [2021-12-14 16:15:52,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273150916] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:15:52,660 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:15:52,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 16:15:52,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243550494] [2021-12-14 16:15:52,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:15:52,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:15:52,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:15:52,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:15:52,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:15:52,662 INFO L87 Difference]: Start difference. First operand 465 states and 635 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:15:53,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:15:53,054 INFO L93 Difference]: Finished difference Result 689 states and 962 transitions. [2021-12-14 16:15:53,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 16:15:53,055 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 57 [2021-12-14 16:15:53,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:15:53,057 INFO L225 Difference]: With dead ends: 689 [2021-12-14 16:15:53,058 INFO L226 Difference]: Without dead ends: 596 [2021-12-14 16:15:53,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:15:53,059 INFO L933 BasicCegarLoop]: 247 mSDtfsCounter, 434 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 689 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 16:15:53,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [446 Valid, 689 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 16:15:53,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2021-12-14 16:15:53,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 555. [2021-12-14 16:15:53,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 475 states have (on average 1.3726315789473684) internal successors, (652), 483 states have internal predecessors, (652), 49 states have call successors, (49), 27 states have call predecessors, (49), 29 states have return successors, (62), 45 states have call predecessors, (62), 47 states have call successors, (62) [2021-12-14 16:15:53,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 763 transitions. [2021-12-14 16:15:53,085 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 763 transitions. Word has length 57 [2021-12-14 16:15:53,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:15:53,086 INFO L470 AbstractCegarLoop]: Abstraction has 555 states and 763 transitions. [2021-12-14 16:15:53,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:15:53,086 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 763 transitions. [2021-12-14 16:15:53,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-14 16:15:53,087 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:15:53,087 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] [2021-12-14 16:15:53,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 16:15:53,088 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:15:53,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:15:53,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1340236402, now seen corresponding path program 1 times [2021-12-14 16:15:53,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:15:53,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038700291] [2021-12-14 16:15:53,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:15:53,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:15:53,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:53,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:15:53,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:53,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 16:15:53,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:53,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 16:15:53,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:53,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-14 16:15:53,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:53,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 16:15:53,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:53,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:15:53,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:15:53,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038700291] [2021-12-14 16:15:53,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038700291] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:15:53,149 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:15:53,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:15:53,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101961311] [2021-12-14 16:15:53,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:15:53,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:15:53,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:15:53,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:15:53,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:15:53,151 INFO L87 Difference]: Start difference. First operand 555 states and 763 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:15:53,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:15:53,631 INFO L93 Difference]: Finished difference Result 887 states and 1237 transitions. [2021-12-14 16:15:53,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:15:53,631 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 57 [2021-12-14 16:15:53,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:15:53,634 INFO L225 Difference]: With dead ends: 887 [2021-12-14 16:15:53,634 INFO L226 Difference]: Without dead ends: 704 [2021-12-14 16:15:53,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 16:15:53,635 INFO L933 BasicCegarLoop]: 304 mSDtfsCounter, 424 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 1018 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 16:15:53,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [436 Valid, 1018 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 16:15:53,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2021-12-14 16:15:53,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 640. [2021-12-14 16:15:53,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 543 states have (on average 1.3756906077348066) internal successors, (747), 552 states have internal predecessors, (747), 59 states have call successors, (59), 33 states have call predecessors, (59), 36 states have return successors, (74), 56 states have call predecessors, (74), 57 states have call successors, (74) [2021-12-14 16:15:53,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 880 transitions. [2021-12-14 16:15:53,671 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 880 transitions. Word has length 57 [2021-12-14 16:15:53,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:15:53,671 INFO L470 AbstractCegarLoop]: Abstraction has 640 states and 880 transitions. [2021-12-14 16:15:53,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:15:53,671 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 880 transitions. [2021-12-14 16:15:53,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-14 16:15:53,672 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:15:53,672 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] [2021-12-14 16:15:53,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 16:15:53,672 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:15:53,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:15:53,673 INFO L85 PathProgramCache]: Analyzing trace with hash 905343052, now seen corresponding path program 1 times [2021-12-14 16:15:53,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:15:53,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609915623] [2021-12-14 16:15:53,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:15:53,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:15:53,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:53,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:15:53,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:53,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 16:15:53,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:53,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 16:15:53,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:53,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-14 16:15:53,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:53,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 16:15:53,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:53,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:15:53,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:15:53,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609915623] [2021-12-14 16:15:53,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609915623] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:15:53,723 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:15:53,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:15:53,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204028844] [2021-12-14 16:15:53,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:15:53,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:15:53,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:15:53,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:15:53,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:15:53,725 INFO L87 Difference]: Start difference. First operand 640 states and 880 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:15:54,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:15:54,200 INFO L93 Difference]: Finished difference Result 1198 states and 1670 transitions. [2021-12-14 16:15:54,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 16:15:54,201 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 57 [2021-12-14 16:15:54,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:15:54,204 INFO L225 Difference]: With dead ends: 1198 [2021-12-14 16:15:54,205 INFO L226 Difference]: Without dead ends: 930 [2021-12-14 16:15:54,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-14 16:15:54,206 INFO L933 BasicCegarLoop]: 290 mSDtfsCounter, 435 mSDsluCounter, 699 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 989 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 16:15:54,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [449 Valid, 989 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 668 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 16:15:54,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2021-12-14 16:15:54,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 798. [2021-12-14 16:15:54,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 798 states, 669 states have (on average 1.3811659192825112) internal successors, (924), 680 states have internal predecessors, (924), 77 states have call successors, (77), 45 states have call predecessors, (77), 50 states have return successors, (100), 76 states have call predecessors, (100), 75 states have call successors, (100) [2021-12-14 16:15:54,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 1101 transitions. [2021-12-14 16:15:54,236 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 1101 transitions. Word has length 57 [2021-12-14 16:15:54,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:15:54,236 INFO L470 AbstractCegarLoop]: Abstraction has 798 states and 1101 transitions. [2021-12-14 16:15:54,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:15:54,237 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 1101 transitions. [2021-12-14 16:15:54,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-14 16:15:54,238 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:15:54,238 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] [2021-12-14 16:15:54,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 16:15:54,239 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:15:54,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:15:54,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1153489546, now seen corresponding path program 1 times [2021-12-14 16:15:54,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:15:54,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204811578] [2021-12-14 16:15:54,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:15:54,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:15:54,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:54,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:15:54,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:54,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 16:15:54,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:54,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 16:15:54,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:54,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-14 16:15:54,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:54,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 16:15:54,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:54,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:15:54,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:15:54,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204811578] [2021-12-14 16:15:54,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204811578] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:15:54,329 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:15:54,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:15:54,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975288424] [2021-12-14 16:15:54,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:15:54,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:15:54,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:15:54,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:15:54,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:15:54,330 INFO L87 Difference]: Start difference. First operand 798 states and 1101 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:15:54,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:15:54,706 INFO L93 Difference]: Finished difference Result 1381 states and 1951 transitions. [2021-12-14 16:15:54,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-14 16:15:54,707 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 57 [2021-12-14 16:15:54,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:15:54,711 INFO L225 Difference]: With dead ends: 1381 [2021-12-14 16:15:54,711 INFO L226 Difference]: Without dead ends: 956 [2021-12-14 16:15:54,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-12-14 16:15:54,712 INFO L933 BasicCegarLoop]: 223 mSDtfsCounter, 224 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 937 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 16:15:54,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 937 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 16:15:54,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2021-12-14 16:15:54,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 813. [2021-12-14 16:15:54,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 813 states, 684 states have (on average 1.3728070175438596) internal successors, (939), 695 states have internal predecessors, (939), 77 states have call successors, (77), 45 states have call predecessors, (77), 50 states have return successors, (100), 76 states have call predecessors, (100), 75 states have call successors, (100) [2021-12-14 16:15:54,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 1116 transitions. [2021-12-14 16:15:54,743 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 1116 transitions. Word has length 57 [2021-12-14 16:15:54,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:15:54,743 INFO L470 AbstractCegarLoop]: Abstraction has 813 states and 1116 transitions. [2021-12-14 16:15:54,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:15:54,743 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 1116 transitions. [2021-12-14 16:15:54,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-14 16:15:54,744 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:15:54,744 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] [2021-12-14 16:15:54,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 16:15:54,744 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:15:54,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:15:54,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1081102988, now seen corresponding path program 1 times [2021-12-14 16:15:54,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:15:54,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416515461] [2021-12-14 16:15:54,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:15:54,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:15:54,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:54,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:15:54,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:54,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 16:15:54,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:54,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 16:15:54,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:54,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-14 16:15:54,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:54,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 16:15:54,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:54,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:15:54,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:15:54,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416515461] [2021-12-14 16:15:54,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416515461] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:15:54,804 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:15:54,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 16:15:54,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712375358] [2021-12-14 16:15:54,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:15:54,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:15:54,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:15:54,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:15:54,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:15:54,806 INFO L87 Difference]: Start difference. First operand 813 states and 1116 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:15:55,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:15:55,170 INFO L93 Difference]: Finished difference Result 1803 states and 2499 transitions. [2021-12-14 16:15:55,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 16:15:55,171 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 57 [2021-12-14 16:15:55,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:15:55,177 INFO L225 Difference]: With dead ends: 1803 [2021-12-14 16:15:55,177 INFO L226 Difference]: Without dead ends: 1363 [2021-12-14 16:15:55,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-12-14 16:15:55,181 INFO L933 BasicCegarLoop]: 328 mSDtfsCounter, 563 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 589 SdHoareTripleChecker+Valid, 787 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 16:15:55,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [589 Valid, 787 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 16:15:55,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1363 states. [2021-12-14 16:15:55,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1363 to 1204. [2021-12-14 16:15:55,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1204 states, 1001 states have (on average 1.3716283716283717) internal successors, (1373), 1016 states have internal predecessors, (1373), 119 states have call successors, (119), 73 states have call predecessors, (119), 82 states have return successors, (152), 118 states have call predecessors, (152), 117 states have call successors, (152) [2021-12-14 16:15:55,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1204 states to 1204 states and 1644 transitions. [2021-12-14 16:15:55,226 INFO L78 Accepts]: Start accepts. Automaton has 1204 states and 1644 transitions. Word has length 57 [2021-12-14 16:15:55,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:15:55,226 INFO L470 AbstractCegarLoop]: Abstraction has 1204 states and 1644 transitions. [2021-12-14 16:15:55,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:15:55,226 INFO L276 IsEmpty]: Start isEmpty. Operand 1204 states and 1644 transitions. [2021-12-14 16:15:55,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-14 16:15:55,227 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:15:55,227 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] [2021-12-14 16:15:55,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-14 16:15:55,228 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:15:55,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:15:55,228 INFO L85 PathProgramCache]: Analyzing trace with hash -690367987, now seen corresponding path program 1 times [2021-12-14 16:15:55,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:15:55,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018642517] [2021-12-14 16:15:55,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:15:55,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:15:55,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:55,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:15:55,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:55,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 16:15:55,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:55,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 16:15:55,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:55,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-14 16:15:55,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:55,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 16:15:55,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:55,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:15:55,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:15:55,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018642517] [2021-12-14 16:15:55,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018642517] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:15:55,301 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:15:55,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:15:55,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388009367] [2021-12-14 16:15:55,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:15:55,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:15:55,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:15:55,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:15:55,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:15:55,302 INFO L87 Difference]: Start difference. First operand 1204 states and 1644 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:15:55,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:15:55,641 INFO L93 Difference]: Finished difference Result 2242 states and 3103 transitions. [2021-12-14 16:15:55,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-14 16:15:55,642 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 57 [2021-12-14 16:15:55,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:15:55,647 INFO L225 Difference]: With dead ends: 2242 [2021-12-14 16:15:55,647 INFO L226 Difference]: Without dead ends: 1411 [2021-12-14 16:15:55,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-12-14 16:15:55,649 INFO L933 BasicCegarLoop]: 217 mSDtfsCounter, 190 mSDsluCounter, 698 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 915 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 16:15:55,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 915 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 16:15:55,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1411 states. [2021-12-14 16:15:55,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1411 to 1219. [2021-12-14 16:15:55,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1219 states, 1016 states have (on average 1.361220472440945) internal successors, (1383), 1031 states have internal predecessors, (1383), 119 states have call successors, (119), 73 states have call predecessors, (119), 82 states have return successors, (152), 118 states have call predecessors, (152), 117 states have call successors, (152) [2021-12-14 16:15:55,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1219 states to 1219 states and 1654 transitions. [2021-12-14 16:15:55,712 INFO L78 Accepts]: Start accepts. Automaton has 1219 states and 1654 transitions. Word has length 57 [2021-12-14 16:15:55,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:15:55,713 INFO L470 AbstractCegarLoop]: Abstraction has 1219 states and 1654 transitions. [2021-12-14 16:15:55,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:15:55,713 INFO L276 IsEmpty]: Start isEmpty. Operand 1219 states and 1654 transitions. [2021-12-14 16:15:55,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-14 16:15:55,715 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:15:55,715 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] [2021-12-14 16:15:55,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-14 16:15:55,716 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:15:55,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:15:55,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1232860047, now seen corresponding path program 1 times [2021-12-14 16:15:55,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:15:55,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175195991] [2021-12-14 16:15:55,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:15:55,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:15:55,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:55,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:15:55,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:55,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 16:15:55,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:55,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 16:15:55,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:55,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-14 16:15:55,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:55,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 16:15:55,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:55,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:15:55,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:15:55,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175195991] [2021-12-14 16:15:55,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175195991] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:15:55,787 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:15:55,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 16:15:55,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884184542] [2021-12-14 16:15:55,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:15:55,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 16:15:55,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:15:55,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 16:15:55,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:15:55,789 INFO L87 Difference]: Start difference. First operand 1219 states and 1654 transitions. Second operand has 8 states, 8 states have (on average 5.875) internal successors, (47), 6 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:15:56,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:15:56,245 INFO L93 Difference]: Finished difference Result 1767 states and 2397 transitions. [2021-12-14 16:15:56,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-14 16:15:56,246 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 6 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 57 [2021-12-14 16:15:56,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:15:56,250 INFO L225 Difference]: With dead ends: 1767 [2021-12-14 16:15:56,250 INFO L226 Difference]: Without dead ends: 1237 [2021-12-14 16:15:56,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-12-14 16:15:56,252 INFO L933 BasicCegarLoop]: 229 mSDtfsCounter, 487 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 500 SdHoareTripleChecker+Valid, 906 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 16:15:56,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [500 Valid, 906 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 16:15:56,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1237 states. [2021-12-14 16:15:56,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1237 to 1051. [2021-12-14 16:15:56,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1051 states, 879 states have (on average 1.3515358361774743) internal successors, (1188), 890 states have internal predecessors, (1188), 103 states have call successors, (103), 62 states have call predecessors, (103), 67 states have return successors, (120), 100 states have call predecessors, (120), 101 states have call successors, (120) [2021-12-14 16:15:56,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1051 states to 1051 states and 1411 transitions. [2021-12-14 16:15:56,286 INFO L78 Accepts]: Start accepts. Automaton has 1051 states and 1411 transitions. Word has length 57 [2021-12-14 16:15:56,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:15:56,287 INFO L470 AbstractCegarLoop]: Abstraction has 1051 states and 1411 transitions. [2021-12-14 16:15:56,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 6 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:15:56,287 INFO L276 IsEmpty]: Start isEmpty. Operand 1051 states and 1411 transitions. [2021-12-14 16:15:56,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-14 16:15:56,288 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:15:56,288 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] [2021-12-14 16:15:56,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-14 16:15:56,289 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:15:56,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:15:56,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1451714765, now seen corresponding path program 1 times [2021-12-14 16:15:56,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:15:56,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242727353] [2021-12-14 16:15:56,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:15:56,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:15:56,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:56,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:15:56,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:56,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 16:15:56,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:56,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 16:15:56,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:56,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-14 16:15:56,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:56,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 16:15:56,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:56,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:15:56,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:15:56,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242727353] [2021-12-14 16:15:56,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242727353] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:15:56,343 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:15:56,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 16:15:56,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147789639] [2021-12-14 16:15:56,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:15:56,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 16:15:56,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:15:56,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 16:15:56,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:15:56,345 INFO L87 Difference]: Start difference. First operand 1051 states and 1411 transitions. Second operand has 8 states, 8 states have (on average 5.875) internal successors, (47), 6 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:15:56,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:15:56,919 INFO L93 Difference]: Finished difference Result 2334 states and 3104 transitions. [2021-12-14 16:15:56,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-14 16:15:56,920 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 6 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 57 [2021-12-14 16:15:56,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:15:56,926 INFO L225 Difference]: With dead ends: 2334 [2021-12-14 16:15:56,926 INFO L226 Difference]: Without dead ends: 1657 [2021-12-14 16:15:56,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2021-12-14 16:15:56,928 INFO L933 BasicCegarLoop]: 242 mSDtfsCounter, 493 mSDsluCounter, 679 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 921 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 16:15:56,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [504 Valid, 921 Invalid, 767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 16:15:56,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1657 states. [2021-12-14 16:15:57,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1657 to 1365. [2021-12-14 16:15:57,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1365 states, 1131 states have (on average 1.3386383731211318) internal successors, (1514), 1148 states have internal predecessors, (1514), 137 states have call successors, (137), 84 states have call predecessors, (137), 95 states have return successors, (168), 136 states have call predecessors, (168), 135 states have call successors, (168) [2021-12-14 16:15:57,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1365 states to 1365 states and 1819 transitions. [2021-12-14 16:15:57,028 INFO L78 Accepts]: Start accepts. Automaton has 1365 states and 1819 transitions. Word has length 57 [2021-12-14 16:15:57,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:15:57,028 INFO L470 AbstractCegarLoop]: Abstraction has 1365 states and 1819 transitions. [2021-12-14 16:15:57,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 6 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:15:57,028 INFO L276 IsEmpty]: Start isEmpty. Operand 1365 states and 1819 transitions. [2021-12-14 16:15:57,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-14 16:15:57,030 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:15:57,030 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] [2021-12-14 16:15:57,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-14 16:15:57,030 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:15:57,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:15:57,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1874416591, now seen corresponding path program 1 times [2021-12-14 16:15:57,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:15:57,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444999833] [2021-12-14 16:15:57,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:15:57,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:15:57,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:57,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:15:57,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:57,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 16:15:57,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:57,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 16:15:57,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:57,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-14 16:15:57,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:57,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 16:15:57,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:57,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:15:57,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:15:57,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444999833] [2021-12-14 16:15:57,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444999833] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:15:57,101 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:15:57,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 16:15:57,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188723909] [2021-12-14 16:15:57,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:15:57,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 16:15:57,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:15:57,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 16:15:57,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:15:57,102 INFO L87 Difference]: Start difference. First operand 1365 states and 1819 transitions. Second operand has 8 states, 8 states have (on average 5.875) internal successors, (47), 6 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:15:57,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:15:57,570 INFO L93 Difference]: Finished difference Result 2334 states and 3094 transitions. [2021-12-14 16:15:57,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-14 16:15:57,570 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 6 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 57 [2021-12-14 16:15:57,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:15:57,575 INFO L225 Difference]: With dead ends: 2334 [2021-12-14 16:15:57,575 INFO L226 Difference]: Without dead ends: 1633 [2021-12-14 16:15:57,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2021-12-14 16:15:57,577 INFO L933 BasicCegarLoop]: 231 mSDtfsCounter, 479 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 902 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 16:15:57,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [489 Valid, 902 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 16:15:57,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1633 states. [2021-12-14 16:15:57,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1633 to 1355. [2021-12-14 16:15:57,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1355 states, 1125 states have (on average 1.3351111111111111) internal successors, (1502), 1138 states have internal predecessors, (1502), 137 states have call successors, (137), 84 states have call predecessors, (137), 91 states have return successors, (158), 134 states have call predecessors, (158), 135 states have call successors, (158) [2021-12-14 16:15:57,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1355 states to 1355 states and 1797 transitions. [2021-12-14 16:15:57,621 INFO L78 Accepts]: Start accepts. Automaton has 1355 states and 1797 transitions. Word has length 57 [2021-12-14 16:15:57,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:15:57,621 INFO L470 AbstractCegarLoop]: Abstraction has 1355 states and 1797 transitions. [2021-12-14 16:15:57,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 6 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:15:57,622 INFO L276 IsEmpty]: Start isEmpty. Operand 1355 states and 1797 transitions. [2021-12-14 16:15:57,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-14 16:15:57,623 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:15:57,623 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] [2021-12-14 16:15:57,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-14 16:15:57,623 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:15:57,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:15:57,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1056768141, now seen corresponding path program 1 times [2021-12-14 16:15:57,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:15:57,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244997968] [2021-12-14 16:15:57,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:15:57,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:15:57,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:57,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:15:57,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:57,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 16:15:57,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:57,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 16:15:57,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:57,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-14 16:15:57,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:57,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 16:15:57,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:57,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:15:57,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:15:57,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244997968] [2021-12-14 16:15:57,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244997968] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:15:57,657 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:15:57,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:15:57,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106028515] [2021-12-14 16:15:57,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:15:57,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 16:15:57,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:15:57,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 16:15:57,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:15:57,658 INFO L87 Difference]: Start difference. First operand 1355 states and 1797 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 3 states have internal predecessors, (47), 1 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-14 16:15:57,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:15:57,909 INFO L93 Difference]: Finished difference Result 2962 states and 3933 transitions. [2021-12-14 16:15:57,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 16:15:57,909 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 3 states have internal predecessors, (47), 1 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 57 [2021-12-14 16:15:57,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:15:57,916 INFO L225 Difference]: With dead ends: 2962 [2021-12-14 16:15:57,916 INFO L226 Difference]: Without dead ends: 1977 [2021-12-14 16:15:57,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:15:57,918 INFO L933 BasicCegarLoop]: 227 mSDtfsCounter, 443 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 16:15:57,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [459 Valid, 519 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 16:15:57,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1977 states. [2021-12-14 16:15:57,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1977 to 1759. [2021-12-14 16:15:57,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1759 states, 1447 states have (on average 1.318590186592951) internal successors, (1908), 1470 states have internal predecessors, (1908), 185 states have call successors, (185), 116 states have call predecessors, (185), 125 states have return successors, (208), 174 states have call predecessors, (208), 183 states have call successors, (208) [2021-12-14 16:15:57,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1759 states to 1759 states and 2301 transitions. [2021-12-14 16:15:57,983 INFO L78 Accepts]: Start accepts. Automaton has 1759 states and 2301 transitions. Word has length 57 [2021-12-14 16:15:57,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:15:57,984 INFO L470 AbstractCegarLoop]: Abstraction has 1759 states and 2301 transitions. [2021-12-14 16:15:57,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 3 states have internal predecessors, (47), 1 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-14 16:15:57,984 INFO L276 IsEmpty]: Start isEmpty. Operand 1759 states and 2301 transitions. [2021-12-14 16:15:57,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-14 16:15:57,985 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:15:57,986 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-14 16:15:57,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-14 16:15:57,986 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:15:57,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:15:57,986 INFO L85 PathProgramCache]: Analyzing trace with hash 2041766118, now seen corresponding path program 1 times [2021-12-14 16:15:57,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:15:57,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095804481] [2021-12-14 16:15:57,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:15:57,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:15:57,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:58,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:15:58,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:58,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 16:15:58,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:58,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 16:15:58,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:58,013 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-14 16:15:58,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:15:58,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095804481] [2021-12-14 16:15:58,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095804481] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:15:58,014 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:15:58,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 16:15:58,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667676802] [2021-12-14 16:15:58,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:15:58,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 16:15:58,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:15:58,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 16:15:58,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 16:15:58,015 INFO L87 Difference]: Start difference. First operand 1759 states and 2301 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-14 16:15:58,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:15:58,181 INFO L93 Difference]: Finished difference Result 2343 states and 3086 transitions. [2021-12-14 16:15:58,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 16:15:58,181 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 62 [2021-12-14 16:15:58,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:15:58,188 INFO L225 Difference]: With dead ends: 2343 [2021-12-14 16:15:58,188 INFO L226 Difference]: Without dead ends: 1987 [2021-12-14 16:15:58,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:15:58,190 INFO L933 BasicCegarLoop]: 306 mSDtfsCounter, 132 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 620 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 16:15:58,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 620 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 16:15:58,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1987 states. [2021-12-14 16:15:58,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1987 to 1949. [2021-12-14 16:15:58,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1949 states, 1613 states have (on average 1.3068815871047736) internal successors, (2108), 1638 states have internal predecessors, (2108), 199 states have call successors, (199), 124 states have call predecessors, (199), 135 states have return successors, (232), 188 states have call predecessors, (232), 197 states have call successors, (232) [2021-12-14 16:15:58,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1949 states to 1949 states and 2539 transitions. [2021-12-14 16:15:58,252 INFO L78 Accepts]: Start accepts. Automaton has 1949 states and 2539 transitions. Word has length 62 [2021-12-14 16:15:58,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:15:58,252 INFO L470 AbstractCegarLoop]: Abstraction has 1949 states and 2539 transitions. [2021-12-14 16:15:58,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-14 16:15:58,252 INFO L276 IsEmpty]: Start isEmpty. Operand 1949 states and 2539 transitions. [2021-12-14 16:15:58,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-14 16:15:58,254 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:15:58,254 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-14 16:15:58,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-14 16:15:58,254 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:15:58,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:15:58,254 INFO L85 PathProgramCache]: Analyzing trace with hash -2064164623, now seen corresponding path program 1 times [2021-12-14 16:15:58,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:15:58,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797017831] [2021-12-14 16:15:58,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:15:58,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:15:58,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:58,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:15:58,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:58,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 16:15:58,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:58,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-14 16:15:58,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:58,293 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-14 16:15:58,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:15:58,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797017831] [2021-12-14 16:15:58,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797017831] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:15:58,294 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:15:58,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 16:15:58,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963867208] [2021-12-14 16:15:58,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:15:58,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 16:15:58,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:15:58,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 16:15:58,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 16:15:58,296 INFO L87 Difference]: Start difference. First operand 1949 states and 2539 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-14 16:15:58,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:15:58,401 INFO L93 Difference]: Finished difference Result 2602 states and 3392 transitions. [2021-12-14 16:15:58,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 16:15:58,402 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2021-12-14 16:15:58,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:15:58,409 INFO L225 Difference]: With dead ends: 2602 [2021-12-14 16:15:58,409 INFO L226 Difference]: Without dead ends: 2148 [2021-12-14 16:15:58,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:15:58,411 INFO L933 BasicCegarLoop]: 252 mSDtfsCounter, 279 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:15:58,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 459 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:15:58,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2148 states. [2021-12-14 16:15:58,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2148 to 2093. [2021-12-14 16:15:58,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2093 states, 1741 states have (on average 1.2975301550832854) internal successors, (2259), 1768 states have internal predecessors, (2259), 207 states have call successors, (207), 130 states have call predecessors, (207), 143 states have return successors, (246), 196 states have call predecessors, (246), 205 states have call successors, (246) [2021-12-14 16:15:58,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2093 states to 2093 states and 2712 transitions. [2021-12-14 16:15:58,503 INFO L78 Accepts]: Start accepts. Automaton has 2093 states and 2712 transitions. Word has length 67 [2021-12-14 16:15:58,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:15:58,503 INFO L470 AbstractCegarLoop]: Abstraction has 2093 states and 2712 transitions. [2021-12-14 16:15:58,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-14 16:15:58,504 INFO L276 IsEmpty]: Start isEmpty. Operand 2093 states and 2712 transitions. [2021-12-14 16:15:58,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-14 16:15:58,505 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:15:58,505 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-14 16:15:58,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-14 16:15:58,505 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:15:58,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:15:58,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1473250423, now seen corresponding path program 1 times [2021-12-14 16:15:58,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:15:58,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246751266] [2021-12-14 16:15:58,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:15:58,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:15:58,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:58,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:15:58,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:58,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 16:15:58,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:58,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-14 16:15:58,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:58,558 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 16:15:58,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:15:58,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246751266] [2021-12-14 16:15:58,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246751266] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:15:58,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379617563] [2021-12-14 16:15:58,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:15:58,558 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:15:58,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:15:58,560 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:15:58,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 16:15:58,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:58,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-14 16:15:58,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:15:58,846 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:15:58,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:15:58,956 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-14 16:15:58,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379617563] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-14 16:15:58,957 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-14 16:15:58,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 8 [2021-12-14 16:15:58,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488624455] [2021-12-14 16:15:58,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:15:58,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 16:15:58,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:15:58,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 16:15:58,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:15:58,959 INFO L87 Difference]: Start difference. First operand 2093 states and 2712 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-14 16:15:59,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:15:59,074 INFO L93 Difference]: Finished difference Result 2149 states and 2780 transitions. [2021-12-14 16:15:59,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 16:15:59,075 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 68 [2021-12-14 16:15:59,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:15:59,083 INFO L225 Difference]: With dead ends: 2149 [2021-12-14 16:15:59,083 INFO L226 Difference]: Without dead ends: 2146 [2021-12-14 16:15:59,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:15:59,084 INFO L933 BasicCegarLoop]: 261 mSDtfsCounter, 399 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:15:59,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [399 Valid, 328 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:15:59,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2146 states. [2021-12-14 16:15:59,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2146 to 2092. [2021-12-14 16:15:59,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2092 states, 1741 states have (on average 1.296381390005744) internal successors, (2257), 1767 states have internal predecessors, (2257), 206 states have call successors, (206), 130 states have call predecessors, (206), 143 states have return successors, (246), 196 states have call predecessors, (246), 205 states have call successors, (246) [2021-12-14 16:15:59,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2092 states to 2092 states and 2709 transitions. [2021-12-14 16:15:59,191 INFO L78 Accepts]: Start accepts. Automaton has 2092 states and 2709 transitions. Word has length 68 [2021-12-14 16:15:59,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:15:59,191 INFO L470 AbstractCegarLoop]: Abstraction has 2092 states and 2709 transitions. [2021-12-14 16:15:59,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-14 16:15:59,192 INFO L276 IsEmpty]: Start isEmpty. Operand 2092 states and 2709 transitions. [2021-12-14 16:15:59,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-14 16:15:59,193 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:15:59,194 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-14 16:15:59,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-14 16:15:59,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-14 16:15:59,408 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:15:59,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:15:59,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1574463180, now seen corresponding path program 1 times [2021-12-14 16:15:59,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:15:59,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941487054] [2021-12-14 16:15:59,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:15:59,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:15:59,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:59,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:15:59,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:59,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 16:15:59,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:59,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-14 16:15:59,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:59,460 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 16:15:59,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:15:59,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941487054] [2021-12-14 16:15:59,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941487054] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:15:59,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137163913] [2021-12-14 16:15:59,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:15:59,461 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:15:59,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:15:59,461 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:15:59,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 16:15:59,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:59,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-14 16:15:59,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:15:59,731 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:15:59,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:15:59,874 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-14 16:15:59,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137163913] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:15:59,875 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:15:59,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 11 [2021-12-14 16:15:59,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281190903] [2021-12-14 16:15:59,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:15:59,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-14 16:15:59,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:15:59,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-14 16:15:59,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:15:59,878 INFO L87 Difference]: Start difference. First operand 2092 states and 2709 transitions. Second operand has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-12-14 16:16:00,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:00,756 INFO L93 Difference]: Finished difference Result 3792 states and 4929 transitions. [2021-12-14 16:16:00,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-14 16:16:00,756 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 69 [2021-12-14 16:16:00,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:00,766 INFO L225 Difference]: With dead ends: 3792 [2021-12-14 16:16:00,766 INFO L226 Difference]: Without dead ends: 3248 [2021-12-14 16:16:00,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=324, Invalid=1482, Unknown=0, NotChecked=0, Total=1806 [2021-12-14 16:16:00,769 INFO L933 BasicCegarLoop]: 366 mSDtfsCounter, 636 mSDsluCounter, 1964 mSDsCounter, 0 mSdLazyCounter, 803 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 658 SdHoareTripleChecker+Valid, 2330 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 803 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:00,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [658 Valid, 2330 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 803 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 16:16:00,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3248 states. [2021-12-14 16:16:00,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3248 to 2481. [2021-12-14 16:16:00,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2481 states, 2091 states have (on average 1.2869440459110473) internal successors, (2691), 2125 states have internal predecessors, (2691), 226 states have call successors, (226), 144 states have call predecessors, (226), 162 states have return successors, (280), 213 states have call predecessors, (280), 225 states have call successors, (280) [2021-12-14 16:16:00,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2481 states to 2481 states and 3197 transitions. [2021-12-14 16:16:00,896 INFO L78 Accepts]: Start accepts. Automaton has 2481 states and 3197 transitions. Word has length 69 [2021-12-14 16:16:00,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:00,897 INFO L470 AbstractCegarLoop]: Abstraction has 2481 states and 3197 transitions. [2021-12-14 16:16:00,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-12-14 16:16:00,898 INFO L276 IsEmpty]: Start isEmpty. Operand 2481 states and 3197 transitions. [2021-12-14 16:16:00,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-14 16:16:00,902 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:00,902 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-14 16:16:00,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-14 16:16:01,115 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,SelfDestructingSolverStorable17 [2021-12-14 16:16:01,116 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:01,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:01,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1815627380, now seen corresponding path program 1 times [2021-12-14 16:16:01,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:01,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543050868] [2021-12-14 16:16:01,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:01,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:01,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:01,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:16:01,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:01,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 16:16:01,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:01,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 16:16:01,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:01,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-14 16:16:01,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:01,159 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-14 16:16:01,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:01,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543050868] [2021-12-14 16:16:01,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543050868] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:16:01,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55995359] [2021-12-14 16:16:01,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:01,160 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:16:01,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:16:01,161 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) [2021-12-14 16:16:01,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 16:16:01,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:01,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 16:16:01,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:16:01,304 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-14 16:16:01,304 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 16:16:01,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55995359] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:01,304 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 16:16:01,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-14 16:16:01,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129539546] [2021-12-14 16:16:01,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:01,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:16:01,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:01,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:16:01,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:16:01,306 INFO L87 Difference]: Start difference. First operand 2481 states and 3197 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-14 16:16:01,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:01,393 INFO L93 Difference]: Finished difference Result 3204 states and 4135 transitions. [2021-12-14 16:16:01,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:16:01,394 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 88 [2021-12-14 16:16:01,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:01,400 INFO L225 Difference]: With dead ends: 3204 [2021-12-14 16:16:01,400 INFO L226 Difference]: Without dead ends: 2359 [2021-12-14 16:16:01,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:16:01,403 INFO L933 BasicCegarLoop]: 267 mSDtfsCounter, 196 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:01,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 342 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:16:01,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2359 states. [2021-12-14 16:16:01,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2359 to 2344. [2021-12-14 16:16:01,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2344 states, 1970 states have (on average 1.2857868020304568) internal successors, (2533), 2003 states have internal predecessors, (2533), 218 states have call successors, (218), 138 states have call predecessors, (218), 154 states have return successors, (266), 204 states have call predecessors, (266), 217 states have call successors, (266) [2021-12-14 16:16:01,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2344 states to 2344 states and 3017 transitions. [2021-12-14 16:16:01,503 INFO L78 Accepts]: Start accepts. Automaton has 2344 states and 3017 transitions. Word has length 88 [2021-12-14 16:16:01,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:01,504 INFO L470 AbstractCegarLoop]: Abstraction has 2344 states and 3017 transitions. [2021-12-14 16:16:01,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-14 16:16:01,504 INFO L276 IsEmpty]: Start isEmpty. Operand 2344 states and 3017 transitions. [2021-12-14 16:16:01,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-14 16:16:01,506 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:01,506 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:16:01,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-14 16:16:01,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:16:01,720 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:01,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:01,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1196332864, now seen corresponding path program 1 times [2021-12-14 16:16:01,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:01,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357768621] [2021-12-14 16:16:01,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:01,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:01,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:01,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:16:01,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:01,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 16:16:01,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:01,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 16:16:01,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:01,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-14 16:16:01,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:01,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 16:16:01,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:01,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-14 16:16:01,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:01,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 16:16:01,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:01,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-14 16:16:01,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:01,804 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-14 16:16:01,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:01,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357768621] [2021-12-14 16:16:01,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357768621] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:01,805 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:16:01,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:16:01,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218383922] [2021-12-14 16:16:01,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:01,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:16:01,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:01,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:16:01,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:16:01,807 INFO L87 Difference]: Start difference. First operand 2344 states and 3017 transitions. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 5 states have internal predecessors, (59), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-14 16:16:02,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:02,230 INFO L93 Difference]: Finished difference Result 5463 states and 7157 transitions. [2021-12-14 16:16:02,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 16:16:02,231 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 5 states have internal predecessors, (59), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 92 [2021-12-14 16:16:02,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:02,247 INFO L225 Difference]: With dead ends: 5463 [2021-12-14 16:16:02,247 INFO L226 Difference]: Without dead ends: 4080 [2021-12-14 16:16:02,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-12-14 16:16:02,251 INFO L933 BasicCegarLoop]: 222 mSDtfsCounter, 784 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 796 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:02,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [796 Valid, 504 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 16:16:02,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4080 states. [2021-12-14 16:16:02,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4080 to 3682. [2021-12-14 16:16:02,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3682 states, 3029 states have (on average 1.2822713766919775) internal successors, (3884), 3089 states have internal predecessors, (3884), 371 states have call successors, (371), 238 states have call predecessors, (371), 280 states have return successors, (512), 358 states have call predecessors, (512), 370 states have call successors, (512) [2021-12-14 16:16:02,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3682 states to 3682 states and 4767 transitions. [2021-12-14 16:16:02,427 INFO L78 Accepts]: Start accepts. Automaton has 3682 states and 4767 transitions. Word has length 92 [2021-12-14 16:16:02,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:02,427 INFO L470 AbstractCegarLoop]: Abstraction has 3682 states and 4767 transitions. [2021-12-14 16:16:02,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 5 states have internal predecessors, (59), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-14 16:16:02,427 INFO L276 IsEmpty]: Start isEmpty. Operand 3682 states and 4767 transitions. [2021-12-14 16:16:02,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-14 16:16:02,430 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:02,430 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:16:02,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-14 16:16:02,431 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:02,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:02,431 INFO L85 PathProgramCache]: Analyzing trace with hash 128523330, now seen corresponding path program 1 times [2021-12-14 16:16:02,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:02,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671516368] [2021-12-14 16:16:02,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:02,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:02,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:02,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:16:02,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:02,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 16:16:02,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:02,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 16:16:02,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:02,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-14 16:16:02,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:02,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 16:16:02,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:02,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-14 16:16:02,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:02,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 16:16:02,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:02,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-14 16:16:02,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:02,473 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-14 16:16:02,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:02,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671516368] [2021-12-14 16:16:02,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671516368] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:02,474 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:16:02,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:16:02,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432654726] [2021-12-14 16:16:02,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:02,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 16:16:02,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:02,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 16:16:02,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:16:02,475 INFO L87 Difference]: Start difference. First operand 3682 states and 4767 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-14 16:16:02,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:02,739 INFO L93 Difference]: Finished difference Result 6081 states and 7883 transitions. [2021-12-14 16:16:02,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:16:02,740 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 92 [2021-12-14 16:16:02,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:02,756 INFO L225 Difference]: With dead ends: 6081 [2021-12-14 16:16:02,756 INFO L226 Difference]: Without dead ends: 3360 [2021-12-14 16:16:02,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:16:02,762 INFO L933 BasicCegarLoop]: 210 mSDtfsCounter, 301 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:02,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 483 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 16:16:02,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3360 states. [2021-12-14 16:16:02,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3360 to 3048. [2021-12-14 16:16:02,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3048 states, 2528 states have (on average 1.2796677215189873) internal successors, (3235), 2579 states have internal predecessors, (3235), 292 states have call successors, (292), 188 states have call predecessors, (292), 226 states have return successors, (402), 282 states have call predecessors, (402), 291 states have call successors, (402) [2021-12-14 16:16:02,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3048 states to 3048 states and 3929 transitions. [2021-12-14 16:16:02,881 INFO L78 Accepts]: Start accepts. Automaton has 3048 states and 3929 transitions. Word has length 92 [2021-12-14 16:16:02,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:02,881 INFO L470 AbstractCegarLoop]: Abstraction has 3048 states and 3929 transitions. [2021-12-14 16:16:02,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-14 16:16:02,882 INFO L276 IsEmpty]: Start isEmpty. Operand 3048 states and 3929 transitions. [2021-12-14 16:16:02,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-14 16:16:02,886 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:02,886 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:16:02,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-14 16:16:02,887 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:02,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:02,887 INFO L85 PathProgramCache]: Analyzing trace with hash 172011463, now seen corresponding path program 1 times [2021-12-14 16:16:02,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:02,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649935265] [2021-12-14 16:16:02,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:02,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:02,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:02,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:16:02,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:02,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 16:16:02,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:02,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 16:16:02,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:02,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-14 16:16:02,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:02,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 16:16:02,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:02,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-14 16:16:02,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:02,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 16:16:02,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:02,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-14 16:16:02,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:02,937 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-14 16:16:02,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:02,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649935265] [2021-12-14 16:16:02,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649935265] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:02,938 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:16:02,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:16:02,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040989998] [2021-12-14 16:16:02,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:02,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:16:02,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:02,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:16:02,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:16:02,939 INFO L87 Difference]: Start difference. First operand 3048 states and 3929 transitions. Second operand has 7 states, 7 states have (on average 9.0) internal successors, (63), 5 states have internal predecessors, (63), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-14 16:16:03,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:03,737 INFO L93 Difference]: Finished difference Result 6551 states and 8590 transitions. [2021-12-14 16:16:03,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-14 16:16:03,739 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.0) internal successors, (63), 5 states have internal predecessors, (63), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 93 [2021-12-14 16:16:03,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:03,749 INFO L225 Difference]: With dead ends: 6551 [2021-12-14 16:16:03,749 INFO L226 Difference]: Without dead ends: 4464 [2021-12-14 16:16:03,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-12-14 16:16:03,755 INFO L933 BasicCegarLoop]: 276 mSDtfsCounter, 1168 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 324 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1182 SdHoareTripleChecker+Valid, 816 SdHoareTripleChecker+Invalid, 1049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 324 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:03,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1182 Valid, 816 Invalid, 1049 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [324 Valid, 725 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-14 16:16:03,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4464 states. [2021-12-14 16:16:03,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4464 to 4168. [2021-12-14 16:16:03,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4168 states, 3452 states have (on average 1.2604287369640788) internal successors, (4351), 3527 states have internal predecessors, (4351), 387 states have call successors, (387), 259 states have call predecessors, (387), 327 states have return successors, (558), 383 states have call predecessors, (558), 386 states have call successors, (558) [2021-12-14 16:16:03,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4168 states to 4168 states and 5296 transitions. [2021-12-14 16:16:03,968 INFO L78 Accepts]: Start accepts. Automaton has 4168 states and 5296 transitions. Word has length 93 [2021-12-14 16:16:03,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:03,969 INFO L470 AbstractCegarLoop]: Abstraction has 4168 states and 5296 transitions. [2021-12-14 16:16:03,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.0) internal successors, (63), 5 states have internal predecessors, (63), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-14 16:16:03,969 INFO L276 IsEmpty]: Start isEmpty. Operand 4168 states and 5296 transitions. [2021-12-14 16:16:03,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-14 16:16:03,972 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:03,972 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:16:03,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-14 16:16:03,972 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:03,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:03,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1890951514, now seen corresponding path program 1 times [2021-12-14 16:16:03,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:03,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035998340] [2021-12-14 16:16:03,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:03,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:03,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:03,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:16:04,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:04,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 16:16:04,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:04,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 16:16:04,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:04,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-14 16:16:04,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:04,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-14 16:16:04,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:04,042 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-14 16:16:04,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:04,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035998340] [2021-12-14 16:16:04,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035998340] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:16:04,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614910112] [2021-12-14 16:16:04,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:04,043 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:16:04,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:16:04,044 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:16:04,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 16:16:04,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:04,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 16:16:04,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:16:04,286 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-14 16:16:04,286 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 16:16:04,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614910112] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:04,286 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 16:16:04,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-14 16:16:04,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329067214] [2021-12-14 16:16:04,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:04,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:16:04,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:04,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:16:04,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:16:04,288 INFO L87 Difference]: Start difference. First operand 4168 states and 5296 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-14 16:16:04,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:04,441 INFO L93 Difference]: Finished difference Result 4547 states and 5764 transitions. [2021-12-14 16:16:04,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:16:04,441 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 103 [2021-12-14 16:16:04,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:04,451 INFO L225 Difference]: With dead ends: 4547 [2021-12-14 16:16:04,451 INFO L226 Difference]: Without dead ends: 3221 [2021-12-14 16:16:04,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:16:04,454 INFO L933 BasicCegarLoop]: 280 mSDtfsCounter, 62 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:04,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 490 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:16:04,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3221 states. [2021-12-14 16:16:04,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3221 to 3221. [2021-12-14 16:16:04,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3221 states, 2608 states have (on average 1.2626533742331287) internal successors, (3293), 2667 states have internal predecessors, (3293), 330 states have call successors, (330), 222 states have call predecessors, (330), 282 states have return successors, (466), 333 states have call predecessors, (466), 330 states have call successors, (466) [2021-12-14 16:16:04,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3221 states to 3221 states and 4089 transitions. [2021-12-14 16:16:04,621 INFO L78 Accepts]: Start accepts. Automaton has 3221 states and 4089 transitions. Word has length 103 [2021-12-14 16:16:04,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:04,621 INFO L470 AbstractCegarLoop]: Abstraction has 3221 states and 4089 transitions. [2021-12-14 16:16:04,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-14 16:16:04,622 INFO L276 IsEmpty]: Start isEmpty. Operand 3221 states and 4089 transitions. [2021-12-14 16:16:04,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-14 16:16:04,624 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:04,625 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:16:04,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-14 16:16:04,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:16:04,840 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:04,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:04,840 INFO L85 PathProgramCache]: Analyzing trace with hash 199854852, now seen corresponding path program 1 times [2021-12-14 16:16:04,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:04,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315843127] [2021-12-14 16:16:04,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:04,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:04,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:04,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:16:04,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:04,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 16:16:04,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:04,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 16:16:04,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:04,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-14 16:16:04,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:04,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 16:16:04,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:04,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-14 16:16:04,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:04,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-14 16:16:04,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:04,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 16:16:04,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:04,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-14 16:16:04,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:04,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 16:16:04,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:04,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-14 16:16:04,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:04,912 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-12-14 16:16:04,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:04,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315843127] [2021-12-14 16:16:04,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315843127] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:04,913 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:16:04,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 16:16:04,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062641021] [2021-12-14 16:16:04,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:04,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 16:16:04,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:04,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 16:16:04,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:16:04,915 INFO L87 Difference]: Start difference. First operand 3221 states and 4089 transitions. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 6 states have internal predecessors, (86), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-12-14 16:16:05,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:05,702 INFO L93 Difference]: Finished difference Result 7795 states and 10213 transitions. [2021-12-14 16:16:05,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-14 16:16:05,703 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 6 states have internal predecessors, (86), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 135 [2021-12-14 16:16:05,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:05,717 INFO L225 Difference]: With dead ends: 7795 [2021-12-14 16:16:05,717 INFO L226 Difference]: Without dead ends: 4713 [2021-12-14 16:16:05,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2021-12-14 16:16:05,726 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 758 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 772 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:05,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [772 Valid, 421 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 16:16:05,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4713 states. [2021-12-14 16:16:05,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4713 to 4229. [2021-12-14 16:16:05,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4229 states, 3447 states have (on average 1.2236727589208007) internal successors, (4218), 3552 states have internal predecessors, (4218), 393 states have call successors, (393), 285 states have call predecessors, (393), 388 states have return successors, (591), 393 states have call predecessors, (591), 393 states have call successors, (591) [2021-12-14 16:16:06,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4229 states to 4229 states and 5202 transitions. [2021-12-14 16:16:06,007 INFO L78 Accepts]: Start accepts. Automaton has 4229 states and 5202 transitions. Word has length 135 [2021-12-14 16:16:06,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:06,007 INFO L470 AbstractCegarLoop]: Abstraction has 4229 states and 5202 transitions. [2021-12-14 16:16:06,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 6 states have internal predecessors, (86), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-12-14 16:16:06,008 INFO L276 IsEmpty]: Start isEmpty. Operand 4229 states and 5202 transitions. [2021-12-14 16:16:06,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-14 16:16:06,012 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:06,012 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:16:06,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-14 16:16:06,012 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:06,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:06,013 INFO L85 PathProgramCache]: Analyzing trace with hash -242597663, now seen corresponding path program 2 times [2021-12-14 16:16:06,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:06,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074059990] [2021-12-14 16:16:06,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:06,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:06,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:06,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:16:06,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:06,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 16:16:06,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:06,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 16:16:06,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:06,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-14 16:16:06,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:06,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 16:16:06,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:06,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-14 16:16:06,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:06,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-14 16:16:06,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:06,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 16:16:06,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:06,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-14 16:16:06,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:06,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 16:16:06,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:06,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-14 16:16:06,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:06,079 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 36 proven. 7 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-14 16:16:06,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:06,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074059990] [2021-12-14 16:16:06,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074059990] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:16:06,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602217624] [2021-12-14 16:16:06,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 16:16:06,080 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:16:06,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:16:06,081 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:16:06,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-14 16:16:06,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 16:16:06,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 16:16:06,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 16:16:06,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:16:06,332 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-14 16:16:06,332 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 16:16:06,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602217624] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:06,333 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 16:16:06,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2021-12-14 16:16:06,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330065213] [2021-12-14 16:16:06,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:06,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:16:06,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:06,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:16:06,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:16:06,334 INFO L87 Difference]: Start difference. First operand 4229 states and 5202 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-14 16:16:06,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:06,490 INFO L93 Difference]: Finished difference Result 7017 states and 8818 transitions. [2021-12-14 16:16:06,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:16:06,491 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 135 [2021-12-14 16:16:06,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:06,520 INFO L225 Difference]: With dead ends: 7017 [2021-12-14 16:16:06,521 INFO L226 Difference]: Without dead ends: 4105 [2021-12-14 16:16:06,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:16:06,528 INFO L933 BasicCegarLoop]: 236 mSDtfsCounter, 78 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:06,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 360 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:16:06,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4105 states. [2021-12-14 16:16:06,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4105 to 4079. [2021-12-14 16:16:06,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4079 states, 3297 states have (on average 1.2095844707309675) internal successors, (3988), 3402 states have internal predecessors, (3988), 393 states have call successors, (393), 285 states have call predecessors, (393), 388 states have return successors, (591), 393 states have call predecessors, (591), 393 states have call successors, (591) [2021-12-14 16:16:06,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4079 states to 4079 states and 4972 transitions. [2021-12-14 16:16:06,716 INFO L78 Accepts]: Start accepts. Automaton has 4079 states and 4972 transitions. Word has length 135 [2021-12-14 16:16:06,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:06,716 INFO L470 AbstractCegarLoop]: Abstraction has 4079 states and 4972 transitions. [2021-12-14 16:16:06,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-14 16:16:06,717 INFO L276 IsEmpty]: Start isEmpty. Operand 4079 states and 4972 transitions. [2021-12-14 16:16:06,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-14 16:16:06,723 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:06,723 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:16:06,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-14 16:16:06,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-14 16:16:06,934 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:06,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:06,934 INFO L85 PathProgramCache]: Analyzing trace with hash 652625369, now seen corresponding path program 1 times [2021-12-14 16:16:06,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:06,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009833429] [2021-12-14 16:16:06,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:06,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:06,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:06,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:16:06,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:06,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 16:16:06,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:06,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 16:16:06,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:06,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-14 16:16:06,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:06,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 16:16:06,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:06,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-14 16:16:06,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:06,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-14 16:16:06,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:06,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 16:16:06,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:06,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-14 16:16:06,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:06,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 16:16:06,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:06,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-14 16:16:06,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:06,997 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-14 16:16:06,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:06,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009833429] [2021-12-14 16:16:06,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009833429] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:06,997 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:16:06,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 16:16:06,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177882742] [2021-12-14 16:16:06,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:06,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:16:06,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:06,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:16:06,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:16:06,999 INFO L87 Difference]: Start difference. First operand 4079 states and 4972 transitions. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 4 states have internal predecessors, (81), 4 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-12-14 16:16:07,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:07,623 INFO L93 Difference]: Finished difference Result 11890 states and 14610 transitions. [2021-12-14 16:16:07,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-14 16:16:07,624 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 4 states have internal predecessors, (81), 4 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) Word has length 136 [2021-12-14 16:16:07,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:07,646 INFO L225 Difference]: With dead ends: 11890 [2021-12-14 16:16:07,647 INFO L226 Difference]: Without dead ends: 8818 [2021-12-14 16:16:07,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-12-14 16:16:07,656 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 541 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 569 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:07,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [569 Valid, 528 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 16:16:07,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8818 states. [2021-12-14 16:16:07,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8818 to 7140. [2021-12-14 16:16:07,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7140 states, 5815 states have (on average 1.2257953568357696) internal successors, (7128), 5993 states have internal predecessors, (7128), 662 states have call successors, (662), 483 states have call predecessors, (662), 662 states have return successors, (1008), 665 states have call predecessors, (1008), 662 states have call successors, (1008) [2021-12-14 16:16:08,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7140 states to 7140 states and 8798 transitions. [2021-12-14 16:16:08,007 INFO L78 Accepts]: Start accepts. Automaton has 7140 states and 8798 transitions. Word has length 136 [2021-12-14 16:16:08,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:08,007 INFO L470 AbstractCegarLoop]: Abstraction has 7140 states and 8798 transitions. [2021-12-14 16:16:08,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 4 states have internal predecessors, (81), 4 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-12-14 16:16:08,007 INFO L276 IsEmpty]: Start isEmpty. Operand 7140 states and 8798 transitions. [2021-12-14 16:16:08,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-14 16:16:08,012 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:08,012 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:16:08,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-14 16:16:08,013 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:08,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:08,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1255313462, now seen corresponding path program 1 times [2021-12-14 16:16:08,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:08,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520152079] [2021-12-14 16:16:08,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:08,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:08,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:08,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:16:08,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:08,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 16:16:08,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:08,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 16:16:08,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:08,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-14 16:16:08,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:08,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 16:16:08,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:08,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-14 16:16:08,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:08,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 16:16:08,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:08,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-14 16:16:08,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:08,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-14 16:16:08,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:08,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-14 16:16:08,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:08,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-14 16:16:08,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:08,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-14 16:16:08,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:08,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-14 16:16:08,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:08,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-14 16:16:08,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:08,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-14 16:16:08,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:08,081 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-12-14 16:16:08,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:08,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520152079] [2021-12-14 16:16:08,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520152079] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:16:08,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285087593] [2021-12-14 16:16:08,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:08,082 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:16:08,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:16:08,083 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:16:08,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-14 16:16:08,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:08,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-14 16:16:08,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:16:08,361 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-14 16:16:08,362 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 16:16:08,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285087593] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:08,362 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 16:16:08,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2021-12-14 16:16:08,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772465949] [2021-12-14 16:16:08,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:08,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:16:08,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:08,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:16:08,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:16:08,363 INFO L87 Difference]: Start difference. First operand 7140 states and 8798 transitions. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-14 16:16:08,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:08,583 INFO L93 Difference]: Finished difference Result 10848 states and 13407 transitions. [2021-12-14 16:16:08,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:16:08,584 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 159 [2021-12-14 16:16:08,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:08,593 INFO L225 Difference]: With dead ends: 10848 [2021-12-14 16:16:08,593 INFO L226 Difference]: Without dead ends: 3722 [2021-12-14 16:16:08,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-12-14 16:16:08,605 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 31 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:08,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 684 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:16:08,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3722 states. [2021-12-14 16:16:08,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3722 to 3450. [2021-12-14 16:16:08,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3450 states, 2842 states have (on average 1.2149894440534834) internal successors, (3453), 2891 states have internal predecessors, (3453), 308 states have call successors, (308), 213 states have call predecessors, (308), 299 states have return successors, (471), 345 states have call predecessors, (471), 308 states have call successors, (471) [2021-12-14 16:16:08,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3450 states to 3450 states and 4232 transitions. [2021-12-14 16:16:08,783 INFO L78 Accepts]: Start accepts. Automaton has 3450 states and 4232 transitions. Word has length 159 [2021-12-14 16:16:08,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:08,784 INFO L470 AbstractCegarLoop]: Abstraction has 3450 states and 4232 transitions. [2021-12-14 16:16:08,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-14 16:16:08,784 INFO L276 IsEmpty]: Start isEmpty. Operand 3450 states and 4232 transitions. [2021-12-14 16:16:08,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-14 16:16:08,787 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:08,787 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:16:08,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-14 16:16:09,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-14 16:16:09,004 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:09,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:09,004 INFO L85 PathProgramCache]: Analyzing trace with hash -790442704, now seen corresponding path program 1 times [2021-12-14 16:16:09,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:09,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967023897] [2021-12-14 16:16:09,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:09,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:09,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:09,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:16:09,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:09,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 16:16:09,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:09,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 16:16:09,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:09,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-14 16:16:09,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:09,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 16:16:09,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:09,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-14 16:16:09,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:09,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 16:16:09,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:09,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-14 16:16:09,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:09,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-14 16:16:09,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:09,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-14 16:16:09,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:09,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-14 16:16:09,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:09,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-14 16:16:09,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:09,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-12-14 16:16:09,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:09,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-14 16:16:09,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:09,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2021-12-14 16:16:09,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:09,087 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-12-14 16:16:09,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:09,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967023897] [2021-12-14 16:16:09,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967023897] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:09,087 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:16:09,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 16:16:09,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716347180] [2021-12-14 16:16:09,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:09,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 16:16:09,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:09,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 16:16:09,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:16:09,089 INFO L87 Difference]: Start difference. First operand 3450 states and 4232 transitions. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 6 states have internal predecessors, (93), 5 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2021-12-14 16:16:09,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:09,571 INFO L93 Difference]: Finished difference Result 6175 states and 7543 transitions. [2021-12-14 16:16:09,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 16:16:09,572 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 6 states have internal predecessors, (93), 5 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) Word has length 163 [2021-12-14 16:16:09,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:09,577 INFO L225 Difference]: With dead ends: 6175 [2021-12-14 16:16:09,577 INFO L226 Difference]: Without dead ends: 2985 [2021-12-14 16:16:09,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-12-14 16:16:09,583 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 613 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 622 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:09,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [622 Valid, 333 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 16:16:09,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2985 states. [2021-12-14 16:16:09,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2985 to 2701. [2021-12-14 16:16:09,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2701 states, 2262 states have (on average 1.1923076923076923) internal successors, (2697), 2275 states have internal predecessors, (2697), 231 states have call successors, (231), 164 states have call predecessors, (231), 207 states have return successors, (314), 261 states have call predecessors, (314), 231 states have call successors, (314) [2021-12-14 16:16:09,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2701 states to 2701 states and 3242 transitions. [2021-12-14 16:16:09,742 INFO L78 Accepts]: Start accepts. Automaton has 2701 states and 3242 transitions. Word has length 163 [2021-12-14 16:16:09,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:09,742 INFO L470 AbstractCegarLoop]: Abstraction has 2701 states and 3242 transitions. [2021-12-14 16:16:09,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 6 states have internal predecessors, (93), 5 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2021-12-14 16:16:09,743 INFO L276 IsEmpty]: Start isEmpty. Operand 2701 states and 3242 transitions. [2021-12-14 16:16:09,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-12-14 16:16:09,746 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:09,746 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:16:09,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-14 16:16:09,747 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:09,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:09,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1045972563, now seen corresponding path program 1 times [2021-12-14 16:16:09,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:09,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500257500] [2021-12-14 16:16:09,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:09,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:09,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:09,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:16:09,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:09,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 16:16:09,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:09,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 16:16:09,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:09,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-14 16:16:09,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:09,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 16:16:09,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:09,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-14 16:16:09,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:09,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 16:16:09,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:09,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-14 16:16:09,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:09,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-14 16:16:09,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:09,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-14 16:16:09,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:09,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-14 16:16:09,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:09,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-14 16:16:09,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:09,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-14 16:16:09,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:09,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-12-14 16:16:09,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:09,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-12-14 16:16:09,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:09,840 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 35 proven. 8 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-14 16:16:09,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:09,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500257500] [2021-12-14 16:16:09,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500257500] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:16:09,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957137746] [2021-12-14 16:16:09,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:09,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:16:09,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:16:09,842 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:16:09,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-14 16:16:09,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:09,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-14 16:16:09,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:16:10,183 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-12-14 16:16:10,183 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 16:16:10,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957137746] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:10,183 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 16:16:10,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 11 [2021-12-14 16:16:10,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235234634] [2021-12-14 16:16:10,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:10,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 16:16:10,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:10,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 16:16:10,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:16:10,185 INFO L87 Difference]: Start difference. First operand 2701 states and 3242 transitions. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 3 states have internal predecessors, (101), 2 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-14 16:16:10,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:10,324 INFO L93 Difference]: Finished difference Result 4595 states and 5560 transitions. [2021-12-14 16:16:10,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 16:16:10,325 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 3 states have internal predecessors, (101), 2 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 164 [2021-12-14 16:16:10,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:10,329 INFO L225 Difference]: With dead ends: 4595 [2021-12-14 16:16:10,330 INFO L226 Difference]: Without dead ends: 2020 [2021-12-14 16:16:10,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-12-14 16:16:10,335 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 106 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:10,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 178 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:16:10,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2020 states. [2021-12-14 16:16:10,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2020 to 1549. [2021-12-14 16:16:10,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1549 states, 1294 states have (on average 1.1452859350850078) internal successors, (1482), 1308 states have internal predecessors, (1482), 124 states have call successors, (124), 104 states have call predecessors, (124), 130 states have return successors, (168), 136 states have call predecessors, (168), 124 states have call successors, (168) [2021-12-14 16:16:10,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1549 states to 1549 states and 1774 transitions. [2021-12-14 16:16:10,409 INFO L78 Accepts]: Start accepts. Automaton has 1549 states and 1774 transitions. Word has length 164 [2021-12-14 16:16:10,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:10,410 INFO L470 AbstractCegarLoop]: Abstraction has 1549 states and 1774 transitions. [2021-12-14 16:16:10,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 3 states have internal predecessors, (101), 2 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-14 16:16:10,410 INFO L276 IsEmpty]: Start isEmpty. Operand 1549 states and 1774 transitions. [2021-12-14 16:16:10,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-12-14 16:16:10,412 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:10,412 INFO L514 BasicCegarLoop]: trace histogram [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, 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] [2021-12-14 16:16:10,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-14 16:16:10,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:16:10,629 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:10,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:10,629 INFO L85 PathProgramCache]: Analyzing trace with hash 239124213, now seen corresponding path program 1 times [2021-12-14 16:16:10,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:10,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263066277] [2021-12-14 16:16:10,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:10,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:10,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:10,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:16:10,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:10,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 16:16:10,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:10,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 16:16:10,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:10,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-14 16:16:10,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:10,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 16:16:10,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:10,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-14 16:16:10,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:10,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-14 16:16:10,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:10,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 16:16:10,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:10,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-14 16:16:10,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:10,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 16:16:10,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:10,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-14 16:16:10,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:10,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2021-12-14 16:16:10,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:10,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 16:16:10,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:10,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2021-12-14 16:16:10,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:10,724 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 67 proven. 14 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-12-14 16:16:10,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:10,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263066277] [2021-12-14 16:16:10,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263066277] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:16:10,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864344589] [2021-12-14 16:16:10,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:10,725 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:16:10,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:16:10,726 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:16:10,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-14 16:16:10,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:10,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 16:16:10,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:16:10,997 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 110 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-14 16:16:10,997 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 16:16:10,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864344589] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:10,998 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 16:16:10,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-14 16:16:10,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101979167] [2021-12-14 16:16:10,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:10,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:16:10,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:10,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:16:10,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:16:10,999 INFO L87 Difference]: Start difference. First operand 1549 states and 1774 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-14 16:16:11,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:11,034 INFO L93 Difference]: Finished difference Result 2085 states and 2411 transitions. [2021-12-14 16:16:11,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:16:11,034 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) Word has length 175 [2021-12-14 16:16:11,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:11,035 INFO L225 Difference]: With dead ends: 2085 [2021-12-14 16:16:11,035 INFO L226 Difference]: Without dead ends: 0 [2021-12-14 16:16:11,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:16:11,037 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 96 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:11,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 267 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:16:11,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-14 16:16:11,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-14 16:16:11,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:16:11,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-14 16:16:11,038 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 175 [2021-12-14 16:16:11,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:11,039 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-14 16:16:11,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-14 16:16:11,039 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-14 16:16:11,039 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-14 16:16:11,041 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2021-12-14 16:16:11,041 INFO L764 garLoopResultBuilder]: Registering result SAFE for location error1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-12-14 16:16:11,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-14 16:16:11,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:16:11,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-12-14 16:16:25,318 WARN L227 SmtUtils]: Spent 13.55s on a formula simplification. DAG size of input: 140 DAG size of output: 139 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-12-14 16:16:36,506 WARN L227 SmtUtils]: Spent 10.49s on a formula simplification. DAG size of input: 123 DAG size of output: 122 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-12-14 16:16:48,629 WARN L227 SmtUtils]: Spent 10.35s on a formula simplification. DAG size of input: 121 DAG size of output: 120 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or)