./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/systemc/token_ring.05.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/systemc/token_ring.05.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 a75784c0f203c4a6f14019aef9d9a89ba63a0efbe594dc5cdecfb5d06e7619f2 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 01:06:57,241 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 01:06:57,243 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 01:06:57,289 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 01:06:57,290 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 01:06:57,291 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 01:06:57,292 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 01:06:57,294 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 01:06:57,303 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 01:06:57,308 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 01:06:57,309 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 01:06:57,310 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 01:06:57,310 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 01:06:57,311 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 01:06:57,312 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 01:06:57,313 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 01:06:57,313 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 01:06:57,314 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 01:06:57,316 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 01:06:57,317 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 01:06:57,319 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 01:06:57,324 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 01:06:57,328 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 01:06:57,329 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 01:06:57,332 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 01:06:57,332 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 01:06:57,332 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 01:06:57,333 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 01:06:57,334 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 01:06:57,334 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 01:06:57,335 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 01:06:57,335 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 01:06:57,336 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 01:06:57,336 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 01:06:57,337 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 01:06:57,337 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 01:06:57,338 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 01:06:57,339 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 01:06:57,339 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 01:06:57,339 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 01:06:57,342 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 01:06:57,343 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 01:06:57,374 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 01:06:57,375 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 01:06:57,375 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 01:06:57,375 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 01:06:57,376 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 01:06:57,376 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 01:06:57,377 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 01:06:57,377 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 01:06:57,377 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 01:06:57,378 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 01:06:57,378 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 01:06:57,379 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 01:06:57,379 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 01:06:57,379 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 01:06:57,379 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 01:06:57,379 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 01:06:57,380 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 01:06:57,380 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 01:06:57,380 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 01:06:57,380 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 01:06:57,381 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 01:06:57,381 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 01:06:57,381 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 01:06:57,381 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 01:06:57,381 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 01:06:57,382 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 01:06:57,382 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 01:06:57,382 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 01:06:57,382 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 01:06:57,382 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 01:06:57,383 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 01:06:57,383 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 01:06:57,383 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 01:06:57,383 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 01:06:57,384 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a75784c0f203c4a6f14019aef9d9a89ba63a0efbe594dc5cdecfb5d06e7619f2 [2021-12-16 01:06:57,654 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 01:06:57,682 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 01:06:57,684 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 01:06:57,685 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 01:06:57,686 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 01:06:57,687 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/systemc/token_ring.05.cil-1.c [2021-12-16 01:06:57,751 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67be547f8/0ae39e5d7e1b448f955dc25cbd2c00e1/FLAG58f27931f [2021-12-16 01:06:58,218 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 01:06:58,218 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/token_ring.05.cil-1.c [2021-12-16 01:06:58,227 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67be547f8/0ae39e5d7e1b448f955dc25cbd2c00e1/FLAG58f27931f [2021-12-16 01:06:58,247 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67be547f8/0ae39e5d7e1b448f955dc25cbd2c00e1 [2021-12-16 01:06:58,249 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 01:06:58,250 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 01:06:58,252 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 01:06:58,252 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 01:06:58,255 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 01:06:58,255 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 01:06:58" (1/1) ... [2021-12-16 01:06:58,256 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e557ba9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:06:58, skipping insertion in model container [2021-12-16 01:06:58,256 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 01:06:58" (1/1) ... [2021-12-16 01:06:58,262 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 01:06:58,308 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 01:06:58,453 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/systemc/token_ring.05.cil-1.c[671,684] [2021-12-16 01:06:58,516 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 01:06:58,524 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 01:06:58,535 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/systemc/token_ring.05.cil-1.c[671,684] [2021-12-16 01:06:58,569 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 01:06:58,587 INFO L208 MainTranslator]: Completed translation [2021-12-16 01:06:58,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:06:58 WrapperNode [2021-12-16 01:06:58,587 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 01:06:58,588 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 01:06:58,588 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 01:06:58,588 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 01:06:58,596 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:06:58" (1/1) ... [2021-12-16 01:06:58,617 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:06:58" (1/1) ... [2021-12-16 01:06:58,649 INFO L137 Inliner]: procedures = 38, calls = 46, calls flagged for inlining = 22, calls inlined = 22, statements flattened = 447 [2021-12-16 01:06:58,649 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 01:06:58,650 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 01:06:58,650 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 01:06:58,650 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 01:06:58,657 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:06:58" (1/1) ... [2021-12-16 01:06:58,658 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:06:58" (1/1) ... [2021-12-16 01:06:58,661 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:06:58" (1/1) ... [2021-12-16 01:06:58,665 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:06:58" (1/1) ... [2021-12-16 01:06:58,684 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:06:58" (1/1) ... [2021-12-16 01:06:58,692 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:06:58" (1/1) ... [2021-12-16 01:06:58,694 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:06:58" (1/1) ... [2021-12-16 01:06:58,697 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 01:06:58,698 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 01:06:58,698 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 01:06:58,698 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 01:06:58,705 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:06:58" (1/1) ... [2021-12-16 01:06:58,715 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 01:06:58,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 01:06:58,735 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) [2021-12-16 01:06:58,737 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 [2021-12-16 01:06:58,763 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 01:06:58,763 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-12-16 01:06:58,763 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-12-16 01:06:58,763 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-12-16 01:06:58,764 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-12-16 01:06:58,764 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-16 01:06:58,764 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-16 01:06:58,764 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-12-16 01:06:58,764 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-12-16 01:06:58,764 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-12-16 01:06:58,764 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-12-16 01:06:58,765 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 01:06:58,765 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-12-16 01:06:58,765 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-12-16 01:06:58,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 01:06:58,765 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 01:06:58,834 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 01:06:58,835 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 01:06:59,315 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 01:06:59,328 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 01:06:59,332 INFO L301 CfgBuilder]: Removed 8 assume(true) statements. [2021-12-16 01:06:59,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 01:06:59 BoogieIcfgContainer [2021-12-16 01:06:59,335 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 01:06:59,336 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 01:06:59,337 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 01:06:59,341 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 01:06:59,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 01:06:58" (1/3) ... [2021-12-16 01:06:59,342 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4893a7a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 01:06:59, skipping insertion in model container [2021-12-16 01:06:59,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:06:58" (2/3) ... [2021-12-16 01:06:59,342 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4893a7a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 01:06:59, skipping insertion in model container [2021-12-16 01:06:59,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 01:06:59" (3/3) ... [2021-12-16 01:06:59,344 INFO L111 eAbstractionObserver]: Analyzing ICFG token_ring.05.cil-1.c [2021-12-16 01:06:59,348 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 01:06:59,348 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-16 01:06:59,399 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 01:06:59,408 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 [2021-12-16 01:06:59,409 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-16 01:06:59,426 INFO L276 IsEmpty]: Start isEmpty. Operand has 207 states, 180 states have (on average 1.6222222222222222) internal successors, (292), 182 states have internal predecessors, (292), 19 states have call successors, (19), 6 states have call predecessors, (19), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-12-16 01:06:59,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-16 01:06:59,436 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:06:59,436 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:06:59,437 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:06:59,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:06:59,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1431654202, now seen corresponding path program 1 times [2021-12-16 01:06:59,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:06:59,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383288848] [2021-12-16 01:06:59,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:06:59,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:06:59,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:06:59,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 01:06:59,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:06:59,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-16 01:06:59,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:06:59,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-16 01:06:59,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:06:59,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-16 01:06:59,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:06:59,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-16 01:06:59,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:06:59,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:06:59,961 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:06:59,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383288848] [2021-12-16 01:06:59,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383288848] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:06:59,962 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:06:59,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 01:06:59,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139219868] [2021-12-16 01:06:59,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:06:59,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 01:06:59,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:06:59,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 01:06:59,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-16 01:07:00,000 INFO L87 Difference]: Start difference. First operand has 207 states, 180 states have (on average 1.6222222222222222) internal successors, (292), 182 states have internal predecessors, (292), 19 states have call successors, (19), 6 states have call predecessors, (19), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 4 states have internal predecessors, (90), 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) [2021-12-16 01:07:01,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:07:01,427 INFO L93 Difference]: Finished difference Result 727 states and 1179 transitions. [2021-12-16 01:07:01,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-16 01:07:01,430 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 4 states have internal predecessors, (90), 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 100 [2021-12-16 01:07:01,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:07:01,453 INFO L225 Difference]: With dead ends: 727 [2021-12-16 01:07:01,453 INFO L226 Difference]: Without dead ends: 525 [2021-12-16 01:07:01,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-16 01:07:01,465 INFO L933 BasicCegarLoop]: 367 mSDtfsCounter, 753 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 953 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 765 SdHoareTripleChecker+Valid, 941 SdHoareTripleChecker+Invalid, 1041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-16 01:07:01,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [765 Valid, 941 Invalid, 1041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 953 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-16 01:07:01,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-12-16 01:07:01,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 396. [2021-12-16 01:07:01,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 349 states have (on average 1.5444126074498568) internal successors, (539), 351 states have internal predecessors, (539), 33 states have call successors, (33), 12 states have call predecessors, (33), 13 states have return successors, (36), 33 states have call predecessors, (36), 33 states have call successors, (36) [2021-12-16 01:07:01,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 608 transitions. [2021-12-16 01:07:01,573 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 608 transitions. Word has length 100 [2021-12-16 01:07:01,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:07:01,574 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 608 transitions. [2021-12-16 01:07:01,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 4 states have internal predecessors, (90), 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) [2021-12-16 01:07:01,575 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 608 transitions. [2021-12-16 01:07:01,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-16 01:07:01,579 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:07:01,579 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:07:01,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 01:07:01,580 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:07:01,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:07:01,581 INFO L85 PathProgramCache]: Analyzing trace with hash -285230402, now seen corresponding path program 1 times [2021-12-16 01:07:01,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:07:01,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691662027] [2021-12-16 01:07:01,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:07:01,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:07:01,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:01,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 01:07:01,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:01,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-16 01:07:01,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:01,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-16 01:07:01,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:01,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-16 01:07:01,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:01,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-16 01:07:01,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:01,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:07:01,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:07:01,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691662027] [2021-12-16 01:07:01,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691662027] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:07:01,764 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:07:01,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 01:07:01,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512276033] [2021-12-16 01:07:01,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:07:01,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 01:07:01,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:07:01,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 01:07:01,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 01:07:01,767 INFO L87 Difference]: Start difference. First operand 396 states and 608 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 5 states have internal predecessors, (90), 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) [2021-12-16 01:07:03,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:07:03,232 INFO L93 Difference]: Finished difference Result 1172 states and 1826 transitions. [2021-12-16 01:07:03,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 01:07:03,233 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 5 states have internal predecessors, (90), 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 100 [2021-12-16 01:07:03,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:07:03,238 INFO L225 Difference]: With dead ends: 1172 [2021-12-16 01:07:03,238 INFO L226 Difference]: Without dead ends: 789 [2021-12-16 01:07:03,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-16 01:07:03,242 INFO L933 BasicCegarLoop]: 506 mSDtfsCounter, 750 mSDsluCounter, 1025 mSDsCounter, 0 mSdLazyCounter, 1498 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 762 SdHoareTripleChecker+Valid, 1531 SdHoareTripleChecker+Invalid, 1559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-16 01:07:03,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [762 Valid, 1531 Invalid, 1559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1498 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-16 01:07:03,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2021-12-16 01:07:03,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 577. [2021-12-16 01:07:03,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 509 states have (on average 1.536345776031434) internal successors, (782), 512 states have internal predecessors, (782), 47 states have call successors, (47), 18 states have call predecessors, (47), 20 states have return successors, (52), 48 states have call predecessors, (52), 47 states have call successors, (52) [2021-12-16 01:07:03,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 881 transitions. [2021-12-16 01:07:03,317 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 881 transitions. Word has length 100 [2021-12-16 01:07:03,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:07:03,318 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 881 transitions. [2021-12-16 01:07:03,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 5 states have internal predecessors, (90), 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) [2021-12-16 01:07:03,319 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 881 transitions. [2021-12-16 01:07:03,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-16 01:07:03,329 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:07:03,330 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:07:03,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 01:07:03,330 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:07:03,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:07:03,331 INFO L85 PathProgramCache]: Analyzing trace with hash 2130605948, now seen corresponding path program 1 times [2021-12-16 01:07:03,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:07:03,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464297912] [2021-12-16 01:07:03,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:07:03,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:07:03,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:03,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 01:07:03,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:03,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-16 01:07:03,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:03,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-16 01:07:03,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:03,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-16 01:07:03,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:03,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-16 01:07:03,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:03,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:07:03,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:07:03,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464297912] [2021-12-16 01:07:03,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464297912] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:07:03,462 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:07:03,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 01:07:03,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702969936] [2021-12-16 01:07:03,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:07:03,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 01:07:03,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:07:03,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 01:07:03,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 01:07:03,465 INFO L87 Difference]: Start difference. First operand 577 states and 881 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 5 states have internal predecessors, (90), 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) [2021-12-16 01:07:04,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:07:04,923 INFO L93 Difference]: Finished difference Result 1846 states and 2867 transitions. [2021-12-16 01:07:04,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 01:07:04,923 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 5 states have internal predecessors, (90), 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 100 [2021-12-16 01:07:04,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:07:04,930 INFO L225 Difference]: With dead ends: 1846 [2021-12-16 01:07:04,931 INFO L226 Difference]: Without dead ends: 1282 [2021-12-16 01:07:04,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-16 01:07:04,934 INFO L933 BasicCegarLoop]: 498 mSDtfsCounter, 747 mSDsluCounter, 1021 mSDsCounter, 0 mSdLazyCounter, 1504 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 759 SdHoareTripleChecker+Valid, 1519 SdHoareTripleChecker+Invalid, 1568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-16 01:07:04,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [759 Valid, 1519 Invalid, 1568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1504 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-16 01:07:04,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1282 states. [2021-12-16 01:07:04,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1282 to 940. [2021-12-16 01:07:04,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 830 states have (on average 1.5289156626506024) internal successors, (1269), 835 states have internal predecessors, (1269), 75 states have call successors, (75), 30 states have call predecessors, (75), 34 states have return successors, (88), 78 states have call predecessors, (88), 75 states have call successors, (88) [2021-12-16 01:07:04,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 1432 transitions. [2021-12-16 01:07:04,989 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 1432 transitions. Word has length 100 [2021-12-16 01:07:04,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:07:04,989 INFO L470 AbstractCegarLoop]: Abstraction has 940 states and 1432 transitions. [2021-12-16 01:07:04,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 5 states have internal predecessors, (90), 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) [2021-12-16 01:07:04,990 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 1432 transitions. [2021-12-16 01:07:04,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-16 01:07:04,991 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:07:04,991 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:07:04,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-16 01:07:04,992 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:07:04,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:07:04,992 INFO L85 PathProgramCache]: Analyzing trace with hash -839505154, now seen corresponding path program 1 times [2021-12-16 01:07:04,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:07:04,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900633686] [2021-12-16 01:07:04,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:07:04,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:07:05,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:05,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 01:07:05,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:05,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-16 01:07:05,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:05,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-16 01:07:05,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:05,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-16 01:07:05,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:05,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-16 01:07:05,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:05,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:07:05,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:07:05,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900633686] [2021-12-16 01:07:05,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900633686] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:07:05,092 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:07:05,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 01:07:05,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560464275] [2021-12-16 01:07:05,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:07:05,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 01:07:05,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:07:05,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 01:07:05,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 01:07:05,094 INFO L87 Difference]: Start difference. First operand 940 states and 1432 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 5 states have internal predecessors, (90), 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) [2021-12-16 01:07:06,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:07:06,525 INFO L93 Difference]: Finished difference Result 3145 states and 4866 transitions. [2021-12-16 01:07:06,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 01:07:06,526 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 5 states have internal predecessors, (90), 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 100 [2021-12-16 01:07:06,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:07:06,538 INFO L225 Difference]: With dead ends: 3145 [2021-12-16 01:07:06,539 INFO L226 Difference]: Without dead ends: 2218 [2021-12-16 01:07:06,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-16 01:07:06,550 INFO L933 BasicCegarLoop]: 494 mSDtfsCounter, 743 mSDsluCounter, 1021 mSDsCounter, 0 mSdLazyCounter, 1499 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 755 SdHoareTripleChecker+Valid, 1515 SdHoareTripleChecker+Invalid, 1563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-16 01:07:06,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [755 Valid, 1515 Invalid, 1563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1499 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-16 01:07:06,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2218 states. [2021-12-16 01:07:06,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2218 to 1667. [2021-12-16 01:07:06,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1667 states, 1473 states have (on average 1.5227427019687712) internal successors, (2243), 1482 states have internal predecessors, (2243), 131 states have call successors, (131), 54 states have call predecessors, (131), 62 states have return successors, (166), 138 states have call predecessors, (166), 131 states have call successors, (166) [2021-12-16 01:07:06,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1667 states to 1667 states and 2540 transitions. [2021-12-16 01:07:06,684 INFO L78 Accepts]: Start accepts. Automaton has 1667 states and 2540 transitions. Word has length 100 [2021-12-16 01:07:06,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:07:06,685 INFO L470 AbstractCegarLoop]: Abstraction has 1667 states and 2540 transitions. [2021-12-16 01:07:06,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 5 states have internal predecessors, (90), 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) [2021-12-16 01:07:06,686 INFO L276 IsEmpty]: Start isEmpty. Operand 1667 states and 2540 transitions. [2021-12-16 01:07:06,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-16 01:07:06,692 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:07:06,692 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:07:06,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-16 01:07:06,693 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:07:06,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:07:06,693 INFO L85 PathProgramCache]: Analyzing trace with hash 727252796, now seen corresponding path program 1 times [2021-12-16 01:07:06,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:07:06,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194482939] [2021-12-16 01:07:06,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:07:06,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:07:06,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:06,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 01:07:06,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:06,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-16 01:07:06,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:06,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-16 01:07:06,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:06,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-16 01:07:06,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:06,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-16 01:07:06,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:06,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:07:06,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:07:06,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194482939] [2021-12-16 01:07:06,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194482939] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:07:06,813 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:07:06,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 01:07:06,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071447276] [2021-12-16 01:07:06,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:07:06,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 01:07:06,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:07:06,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 01:07:06,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 01:07:06,815 INFO L87 Difference]: Start difference. First operand 1667 states and 2540 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 5 states have internal predecessors, (90), 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) [2021-12-16 01:07:08,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:07:08,317 INFO L93 Difference]: Finished difference Result 5742 states and 8880 transitions. [2021-12-16 01:07:08,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 01:07:08,318 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 5 states have internal predecessors, (90), 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 100 [2021-12-16 01:07:08,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:07:08,340 INFO L225 Difference]: With dead ends: 5742 [2021-12-16 01:07:08,340 INFO L226 Difference]: Without dead ends: 4088 [2021-12-16 01:07:08,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-16 01:07:08,349 INFO L933 BasicCegarLoop]: 488 mSDtfsCounter, 742 mSDsluCounter, 1021 mSDsCounter, 0 mSdLazyCounter, 1491 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 754 SdHoareTripleChecker+Valid, 1509 SdHoareTripleChecker+Invalid, 1558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-16 01:07:08,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [754 Valid, 1509 Invalid, 1558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1491 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-16 01:07:08,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4088 states. [2021-12-16 01:07:08,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4088 to 3126. [2021-12-16 01:07:08,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3126 states, 2764 states have (on average 1.518451519536903) internal successors, (4197), 2781 states have internal predecessors, (4197), 243 states have call successors, (243), 102 states have call predecessors, (243), 118 states have return successors, (340), 258 states have call predecessors, (340), 243 states have call successors, (340) [2021-12-16 01:07:08,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3126 states to 3126 states and 4780 transitions. [2021-12-16 01:07:08,554 INFO L78 Accepts]: Start accepts. Automaton has 3126 states and 4780 transitions. Word has length 100 [2021-12-16 01:07:08,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:07:08,555 INFO L470 AbstractCegarLoop]: Abstraction has 3126 states and 4780 transitions. [2021-12-16 01:07:08,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 5 states have internal predecessors, (90), 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) [2021-12-16 01:07:08,555 INFO L276 IsEmpty]: Start isEmpty. Operand 3126 states and 4780 transitions. [2021-12-16 01:07:08,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-16 01:07:08,559 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:07:08,559 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:07:08,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-16 01:07:08,559 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:07:08,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:07:08,560 INFO L85 PathProgramCache]: Analyzing trace with hash -330585282, now seen corresponding path program 1 times [2021-12-16 01:07:08,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:07:08,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041540417] [2021-12-16 01:07:08,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:07:08,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:07:08,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:08,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 01:07:08,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:08,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-16 01:07:08,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:08,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-16 01:07:08,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:08,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-16 01:07:08,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:08,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-16 01:07:08,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:08,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:07:08,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:07:08,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041540417] [2021-12-16 01:07:08,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041540417] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:07:08,667 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:07:08,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 01:07:08,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746677068] [2021-12-16 01:07:08,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:07:08,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 01:07:08,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:07:08,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 01:07:08,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 01:07:08,669 INFO L87 Difference]: Start difference. First operand 3126 states and 4780 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 5 states have internal predecessors, (90), 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) [2021-12-16 01:07:10,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:07:10,296 INFO L93 Difference]: Finished difference Result 12184 states and 18828 transitions. [2021-12-16 01:07:10,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-16 01:07:10,297 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 5 states have internal predecessors, (90), 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 100 [2021-12-16 01:07:10,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:07:10,347 INFO L225 Difference]: With dead ends: 12184 [2021-12-16 01:07:10,347 INFO L226 Difference]: Without dead ends: 9071 [2021-12-16 01:07:10,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-16 01:07:10,361 INFO L933 BasicCegarLoop]: 362 mSDtfsCounter, 1007 mSDsluCounter, 698 mSDsCounter, 0 mSdLazyCounter, 1306 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1025 SdHoareTripleChecker+Valid, 1060 SdHoareTripleChecker+Invalid, 1399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-16 01:07:10,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1025 Valid, 1060 Invalid, 1399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1306 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-16 01:07:10,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9071 states. [2021-12-16 01:07:10,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9071 to 6026. [2021-12-16 01:07:10,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6026 states, 5344 states have (on average 1.5203967065868262) internal successors, (8125), 5377 states have internal predecessors, (8125), 451 states have call successors, (451), 198 states have call predecessors, (451), 230 states have return successors, (726), 482 states have call predecessors, (726), 451 states have call successors, (726) [2021-12-16 01:07:10,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6026 states to 6026 states and 9302 transitions. [2021-12-16 01:07:10,724 INFO L78 Accepts]: Start accepts. Automaton has 6026 states and 9302 transitions. Word has length 100 [2021-12-16 01:07:10,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:07:10,724 INFO L470 AbstractCegarLoop]: Abstraction has 6026 states and 9302 transitions. [2021-12-16 01:07:10,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 5 states have internal predecessors, (90), 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) [2021-12-16 01:07:10,724 INFO L276 IsEmpty]: Start isEmpty. Operand 6026 states and 9302 transitions. [2021-12-16 01:07:10,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-16 01:07:10,731 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:07:10,731 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:07:10,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-16 01:07:10,732 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:07:10,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:07:10,732 INFO L85 PathProgramCache]: Analyzing trace with hash -90345536, now seen corresponding path program 1 times [2021-12-16 01:07:10,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:07:10,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033721325] [2021-12-16 01:07:10,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:07:10,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:07:10,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:10,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 01:07:10,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:10,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-16 01:07:10,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:10,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-16 01:07:10,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:10,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-16 01:07:10,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:10,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-16 01:07:10,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:10,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:07:10,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:07:10,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033721325] [2021-12-16 01:07:10,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033721325] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:07:10,839 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:07:10,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 01:07:10,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021522438] [2021-12-16 01:07:10,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:07:10,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 01:07:10,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:07:10,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 01:07:10,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 01:07:10,841 INFO L87 Difference]: Start difference. First operand 6026 states and 9302 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 5 states have internal predecessors, (90), 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) [2021-12-16 01:07:12,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:07:12,804 INFO L93 Difference]: Finished difference Result 23310 states and 36288 transitions. [2021-12-16 01:07:12,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-16 01:07:12,805 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 5 states have internal predecessors, (90), 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 100 [2021-12-16 01:07:12,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:07:12,918 INFO L225 Difference]: With dead ends: 23310 [2021-12-16 01:07:12,918 INFO L226 Difference]: Without dead ends: 17297 [2021-12-16 01:07:12,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-16 01:07:12,948 INFO L933 BasicCegarLoop]: 548 mSDtfsCounter, 778 mSDsluCounter, 1010 mSDsCounter, 0 mSdLazyCounter, 1689 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 789 SdHoareTripleChecker+Valid, 1558 SdHoareTripleChecker+Invalid, 1759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-16 01:07:12,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [789 Valid, 1558 Invalid, 1759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1689 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-16 01:07:12,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17297 states. [2021-12-16 01:07:13,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17297 to 11647. [2021-12-16 01:07:13,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11647 states, 10341 states have (on average 1.5216129968088192) internal successors, (15735), 10406 states have internal predecessors, (15735), 851 states have call successors, (851), 390 states have call predecessors, (851), 454 states have return successors, (1644), 914 states have call predecessors, (1644), 851 states have call successors, (1644) [2021-12-16 01:07:13,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11647 states to 11647 states and 18230 transitions. [2021-12-16 01:07:13,679 INFO L78 Accepts]: Start accepts. Automaton has 11647 states and 18230 transitions. Word has length 100 [2021-12-16 01:07:13,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:07:13,680 INFO L470 AbstractCegarLoop]: Abstraction has 11647 states and 18230 transitions. [2021-12-16 01:07:13,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 5 states have internal predecessors, (90), 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) [2021-12-16 01:07:13,681 INFO L276 IsEmpty]: Start isEmpty. Operand 11647 states and 18230 transitions. [2021-12-16 01:07:13,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-16 01:07:13,692 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:07:13,693 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:07:13,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-16 01:07:13,693 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:07:13,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:07:13,694 INFO L85 PathProgramCache]: Analyzing trace with hash 748688126, now seen corresponding path program 1 times [2021-12-16 01:07:13,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:07:13,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845937728] [2021-12-16 01:07:13,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:07:13,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:07:13,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:13,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 01:07:13,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:13,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-16 01:07:13,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:13,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-16 01:07:13,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:13,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-16 01:07:13,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:13,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-16 01:07:13,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:13,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:07:13,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:07:13,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845937728] [2021-12-16 01:07:13,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845937728] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:07:13,806 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:07:13,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 01:07:13,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097794312] [2021-12-16 01:07:13,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:07:13,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 01:07:13,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:07:13,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 01:07:13,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-16 01:07:13,808 INFO L87 Difference]: Start difference. First operand 11647 states and 18230 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 5 states have internal predecessors, (90), 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) [2021-12-16 01:07:15,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:07:15,099 INFO L93 Difference]: Finished difference Result 26637 states and 42451 transitions. [2021-12-16 01:07:15,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 01:07:15,100 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 5 states have internal predecessors, (90), 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 100 [2021-12-16 01:07:15,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:07:15,174 INFO L225 Difference]: With dead ends: 26637 [2021-12-16 01:07:15,174 INFO L226 Difference]: Without dead ends: 15003 [2021-12-16 01:07:15,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-16 01:07:15,255 INFO L933 BasicCegarLoop]: 294 mSDtfsCounter, 631 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 644 SdHoareTripleChecker+Valid, 675 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-16 01:07:15,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [644 Valid, 675 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-16 01:07:15,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15003 states. [2021-12-16 01:07:15,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15003 to 11647. [2021-12-16 01:07:15,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11647 states, 10341 states have (on average 1.5153273377816459) internal successors, (15670), 10406 states have internal predecessors, (15670), 851 states have call successors, (851), 390 states have call predecessors, (851), 454 states have return successors, (1644), 914 states have call predecessors, (1644), 851 states have call successors, (1644) [2021-12-16 01:07:15,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11647 states to 11647 states and 18165 transitions. [2021-12-16 01:07:15,966 INFO L78 Accepts]: Start accepts. Automaton has 11647 states and 18165 transitions. Word has length 100 [2021-12-16 01:07:15,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:07:15,967 INFO L470 AbstractCegarLoop]: Abstraction has 11647 states and 18165 transitions. [2021-12-16 01:07:15,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 5 states have internal predecessors, (90), 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) [2021-12-16 01:07:15,967 INFO L276 IsEmpty]: Start isEmpty. Operand 11647 states and 18165 transitions. [2021-12-16 01:07:15,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-16 01:07:15,978 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:07:15,978 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:07:15,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-16 01:07:15,979 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:07:15,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:07:15,979 INFO L85 PathProgramCache]: Analyzing trace with hash 775753728, now seen corresponding path program 1 times [2021-12-16 01:07:15,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:07:15,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839718715] [2021-12-16 01:07:15,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:07:15,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:07:15,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:16,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 01:07:16,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:16,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-16 01:07:16,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:16,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-16 01:07:16,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:16,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-16 01:07:16,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:16,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-16 01:07:16,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:16,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:07:16,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:07:16,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839718715] [2021-12-16 01:07:16,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839718715] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:07:16,090 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:07:16,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 01:07:16,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220440618] [2021-12-16 01:07:16,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:07:16,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 01:07:16,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:07:16,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 01:07:16,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-16 01:07:16,092 INFO L87 Difference]: Start difference. First operand 11647 states and 18165 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 5 states have internal predecessors, (90), 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) [2021-12-16 01:07:17,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:07:17,332 INFO L93 Difference]: Finished difference Result 26571 states and 42124 transitions. [2021-12-16 01:07:17,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 01:07:17,333 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 5 states have internal predecessors, (90), 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 100 [2021-12-16 01:07:17,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:07:17,388 INFO L225 Difference]: With dead ends: 26571 [2021-12-16 01:07:17,388 INFO L226 Difference]: Without dead ends: 14937 [2021-12-16 01:07:17,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-16 01:07:17,413 INFO L933 BasicCegarLoop]: 290 mSDtfsCounter, 547 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 775 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-16 01:07:17,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [560 Valid, 775 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 689 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-16 01:07:17,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14937 states. [2021-12-16 01:07:17,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14937 to 11647. [2021-12-16 01:07:17,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11647 states, 10341 states have (on average 1.5090416787544725) internal successors, (15605), 10406 states have internal predecessors, (15605), 851 states have call successors, (851), 390 states have call predecessors, (851), 454 states have return successors, (1644), 914 states have call predecessors, (1644), 851 states have call successors, (1644) [2021-12-16 01:07:17,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11647 states to 11647 states and 18100 transitions. [2021-12-16 01:07:17,998 INFO L78 Accepts]: Start accepts. Automaton has 11647 states and 18100 transitions. Word has length 100 [2021-12-16 01:07:17,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:07:17,998 INFO L470 AbstractCegarLoop]: Abstraction has 11647 states and 18100 transitions. [2021-12-16 01:07:17,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 5 states have internal predecessors, (90), 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) [2021-12-16 01:07:17,998 INFO L276 IsEmpty]: Start isEmpty. Operand 11647 states and 18100 transitions. [2021-12-16 01:07:18,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-16 01:07:18,009 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:07:18,009 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:07:18,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-16 01:07:18,010 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:07:18,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:07:18,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1301583170, now seen corresponding path program 1 times [2021-12-16 01:07:18,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:07:18,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456132857] [2021-12-16 01:07:18,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:07:18,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:07:18,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:18,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 01:07:18,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:18,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-16 01:07:18,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:18,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-16 01:07:18,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:18,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-16 01:07:18,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:18,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-16 01:07:18,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:18,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:07:18,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:07:18,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456132857] [2021-12-16 01:07:18,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456132857] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:07:18,095 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:07:18,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 01:07:18,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71562123] [2021-12-16 01:07:18,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:07:18,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 01:07:18,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:07:18,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 01:07:18,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 01:07:18,097 INFO L87 Difference]: Start difference. First operand 11647 states and 18100 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 5 states have internal predecessors, (90), 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) [2021-12-16 01:07:20,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:07:20,581 INFO L93 Difference]: Finished difference Result 42565 states and 66638 transitions. [2021-12-16 01:07:20,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-16 01:07:20,581 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 5 states have internal predecessors, (90), 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 100 [2021-12-16 01:07:20,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:07:20,706 INFO L225 Difference]: With dead ends: 42565 [2021-12-16 01:07:20,706 INFO L226 Difference]: Without dead ends: 30931 [2021-12-16 01:07:20,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-16 01:07:20,738 INFO L933 BasicCegarLoop]: 484 mSDtfsCounter, 734 mSDsluCounter, 1013 mSDsCounter, 0 mSdLazyCounter, 1539 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 745 SdHoareTripleChecker+Valid, 1497 SdHoareTripleChecker+Invalid, 1609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-16 01:07:20,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [745 Valid, 1497 Invalid, 1609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1539 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-16 01:07:20,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30931 states. [2021-12-16 01:07:21,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30931 to 23146. [2021-12-16 01:07:21,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23146 states, 20624 states have (on average 1.508679208688906) internal successors, (31115), 20753 states have internal predecessors, (31115), 1619 states have call successors, (1619), 774 states have call predecessors, (1619), 902 states have return successors, (3934), 1746 states have call predecessors, (3934), 1619 states have call successors, (3934) [2021-12-16 01:07:21,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23146 states to 23146 states and 36668 transitions. [2021-12-16 01:07:21,860 INFO L78 Accepts]: Start accepts. Automaton has 23146 states and 36668 transitions. Word has length 100 [2021-12-16 01:07:21,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:07:21,861 INFO L470 AbstractCegarLoop]: Abstraction has 23146 states and 36668 transitions. [2021-12-16 01:07:21,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 5 states have internal predecessors, (90), 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) [2021-12-16 01:07:21,861 INFO L276 IsEmpty]: Start isEmpty. Operand 23146 states and 36668 transitions. [2021-12-16 01:07:21,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-16 01:07:21,877 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:07:21,878 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:07:21,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-16 01:07:21,878 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:07:21,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:07:21,879 INFO L85 PathProgramCache]: Analyzing trace with hash 432521280, now seen corresponding path program 1 times [2021-12-16 01:07:21,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:07:21,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103700403] [2021-12-16 01:07:21,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:07:21,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:07:21,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:21,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 01:07:21,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:21,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-16 01:07:21,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:21,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-16 01:07:21,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:21,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-16 01:07:21,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:21,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-16 01:07:21,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:21,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:07:21,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:07:21,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103700403] [2021-12-16 01:07:21,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103700403] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:07:21,959 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:07:21,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 01:07:21,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575569274] [2021-12-16 01:07:21,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:07:21,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 01:07:21,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:07:21,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 01:07:21,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-16 01:07:21,961 INFO L87 Difference]: Start difference. First operand 23146 states and 36668 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 5 states have internal predecessors, (90), 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) [2021-12-16 01:07:24,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:07:24,017 INFO L93 Difference]: Finished difference Result 52253 states and 84419 transitions. [2021-12-16 01:07:24,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 01:07:24,017 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 5 states have internal predecessors, (90), 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 100 [2021-12-16 01:07:24,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:07:24,158 INFO L225 Difference]: With dead ends: 52253 [2021-12-16 01:07:24,158 INFO L226 Difference]: Without dead ends: 29120 [2021-12-16 01:07:24,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-16 01:07:24,291 INFO L933 BasicCegarLoop]: 284 mSDtfsCounter, 628 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 641 SdHoareTripleChecker+Valid, 665 SdHoareTripleChecker+Invalid, 685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-16 01:07:24,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [641 Valid, 665 Invalid, 685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-16 01:07:24,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29120 states. [2021-12-16 01:07:25,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29120 to 23146. [2021-12-16 01:07:25,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23146 states, 20624 states have (on average 1.5024243599689682) internal successors, (30986), 20753 states have internal predecessors, (30986), 1619 states have call successors, (1619), 774 states have call predecessors, (1619), 902 states have return successors, (3934), 1746 states have call predecessors, (3934), 1619 states have call successors, (3934) [2021-12-16 01:07:25,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23146 states to 23146 states and 36539 transitions. [2021-12-16 01:07:25,373 INFO L78 Accepts]: Start accepts. Automaton has 23146 states and 36539 transitions. Word has length 100 [2021-12-16 01:07:25,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:07:25,373 INFO L470 AbstractCegarLoop]: Abstraction has 23146 states and 36539 transitions. [2021-12-16 01:07:25,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 5 states have internal predecessors, (90), 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) [2021-12-16 01:07:25,374 INFO L276 IsEmpty]: Start isEmpty. Operand 23146 states and 36539 transitions. [2021-12-16 01:07:25,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-16 01:07:25,534 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:07:25,534 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:07:25,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-16 01:07:25,535 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:07:25,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:07:25,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1319744126, now seen corresponding path program 1 times [2021-12-16 01:07:25,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:07:25,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340136626] [2021-12-16 01:07:25,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:07:25,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:07:25,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:25,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 01:07:25,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:25,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-16 01:07:25,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:25,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-16 01:07:25,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:25,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-16 01:07:25,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:25,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-16 01:07:25,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:25,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:07:25,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:07:25,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340136626] [2021-12-16 01:07:25,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340136626] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:07:25,659 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:07:25,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 01:07:25,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383686697] [2021-12-16 01:07:25,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:07:25,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 01:07:25,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:07:25,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 01:07:25,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-16 01:07:25,661 INFO L87 Difference]: Start difference. First operand 23146 states and 36539 transitions. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 4 states have internal predecessors, (90), 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) [2021-12-16 01:07:28,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:07:28,609 INFO L93 Difference]: Finished difference Result 66487 states and 104409 transitions. [2021-12-16 01:07:28,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-16 01:07:28,609 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 4 states have internal predecessors, (90), 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 100 [2021-12-16 01:07:28,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:07:28,770 INFO L225 Difference]: With dead ends: 66487 [2021-12-16 01:07:28,771 INFO L226 Difference]: Without dead ends: 43355 [2021-12-16 01:07:28,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-12-16 01:07:28,842 INFO L933 BasicCegarLoop]: 600 mSDtfsCounter, 951 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 1152 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 982 SdHoareTripleChecker+Valid, 1247 SdHoareTripleChecker+Invalid, 1249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-16 01:07:28,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [982 Valid, 1247 Invalid, 1249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1152 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-16 01:07:28,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43355 states. [2021-12-16 01:07:30,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43355 to 34646. [2021-12-16 01:07:30,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34646 states, 30823 states have (on average 1.492100055153619) internal successors, (45991), 31081 states have internal predecessors, (45991), 2466 states have call successors, (2466), 1164 states have call predecessors, (2466), 1356 states have return successors, (5511), 2528 states have call predecessors, (5511), 2466 states have call successors, (5511) [2021-12-16 01:07:30,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34646 states to 34646 states and 53968 transitions. [2021-12-16 01:07:30,533 INFO L78 Accepts]: Start accepts. Automaton has 34646 states and 53968 transitions. Word has length 100 [2021-12-16 01:07:30,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:07:30,534 INFO L470 AbstractCegarLoop]: Abstraction has 34646 states and 53968 transitions. [2021-12-16 01:07:30,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 4 states have internal predecessors, (90), 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) [2021-12-16 01:07:30,534 INFO L276 IsEmpty]: Start isEmpty. Operand 34646 states and 53968 transitions. [2021-12-16 01:07:30,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-16 01:07:30,614 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:07:30,614 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:07:30,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-16 01:07:30,615 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:07:30,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:07:30,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1082044033, now seen corresponding path program 1 times [2021-12-16 01:07:30,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:07:30,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654321754] [2021-12-16 01:07:30,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:07:30,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:07:30,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:30,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 01:07:30,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:30,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-16 01:07:30,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:30,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-16 01:07:30,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:30,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-16 01:07:30,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:30,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-16 01:07:30,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:30,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-16 01:07:30,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:30,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 01:07:30,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:30,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2021-12-16 01:07:30,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:30,742 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-16 01:07:30,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:07:30,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654321754] [2021-12-16 01:07:30,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654321754] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 01:07:30,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736871515] [2021-12-16 01:07:30,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:07:30,743 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 01:07:30,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 01:07:30,745 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) [2021-12-16 01:07:30,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 01:07:30,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:30,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 01:07:30,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 01:07:31,120 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-16 01:07:31,121 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 01:07:31,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736871515] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:07:31,121 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 01:07:31,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-16 01:07:31,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221088915] [2021-12-16 01:07:31,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:07:31,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 01:07:31,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:07:31,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 01:07:31,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 01:07:31,123 INFO L87 Difference]: Start difference. First operand 34646 states and 53968 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-16 01:07:33,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:07:33,862 INFO L93 Difference]: Finished difference Result 103227 states and 161956 transitions. [2021-12-16 01:07:33,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 01:07:33,863 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 163 [2021-12-16 01:07:33,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:07:34,138 INFO L225 Difference]: With dead ends: 103227 [2021-12-16 01:07:34,138 INFO L226 Difference]: Without dead ends: 68595 [2021-12-16 01:07:34,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 01:07:34,394 INFO L933 BasicCegarLoop]: 315 mSDtfsCounter, 246 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 01:07:34,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 588 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:07:34,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68595 states. [2021-12-16 01:07:37,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68595 to 68205. [2021-12-16 01:07:37,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68205 states, 60662 states have (on average 1.4903893706109261) internal successors, (90410), 61177 states have internal predecessors, (90410), 4830 states have call successors, (4830), 2328 states have call predecessors, (4830), 2712 states have return successors, (10793), 4827 states have call predecessors, (10793), 4830 states have call successors, (10793) [2021-12-16 01:07:37,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68205 states to 68205 states and 106033 transitions. [2021-12-16 01:07:37,618 INFO L78 Accepts]: Start accepts. Automaton has 68205 states and 106033 transitions. Word has length 163 [2021-12-16 01:07:37,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:07:37,619 INFO L470 AbstractCegarLoop]: Abstraction has 68205 states and 106033 transitions. [2021-12-16 01:07:37,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-16 01:07:37,620 INFO L276 IsEmpty]: Start isEmpty. Operand 68205 states and 106033 transitions. [2021-12-16 01:07:37,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-16 01:07:37,964 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:07:37,965 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:07:37,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-16 01:07:38,187 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,SelfDestructingSolverStorable12 [2021-12-16 01:07:38,187 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:07:38,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:07:38,188 INFO L85 PathProgramCache]: Analyzing trace with hash -2027862433, now seen corresponding path program 1 times [2021-12-16 01:07:38,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:07:38,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400818625] [2021-12-16 01:07:38,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:07:38,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:07:38,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:38,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 01:07:38,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:38,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-16 01:07:38,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:38,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-16 01:07:38,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:38,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-16 01:07:38,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:38,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-16 01:07:38,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:38,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-16 01:07:38,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:38,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 01:07:38,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:38,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2021-12-16 01:07:38,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:38,313 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-16 01:07:38,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:07:38,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400818625] [2021-12-16 01:07:38,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400818625] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 01:07:38,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407377497] [2021-12-16 01:07:38,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:07:38,314 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 01:07:38,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 01:07:38,316 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) [2021-12-16 01:07:38,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 01:07:38,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:38,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 624 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 01:07:38,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 01:07:38,744 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-16 01:07:38,744 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 01:07:38,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407377497] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:07:38,745 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 01:07:38,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-16 01:07:38,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934581025] [2021-12-16 01:07:38,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:07:38,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 01:07:38,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:07:38,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 01:07:38,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 01:07:38,749 INFO L87 Difference]: Start difference. First operand 68205 states and 106033 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 2 states have internal predecessors, (115), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-16 01:07:43,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:07:43,521 INFO L93 Difference]: Finished difference Result 202646 states and 317319 transitions. [2021-12-16 01:07:43,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 01:07:43,521 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 2 states have internal predecessors, (115), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 163 [2021-12-16 01:07:43,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:07:44,237 INFO L225 Difference]: With dead ends: 202646 [2021-12-16 01:07:44,237 INFO L226 Difference]: Without dead ends: 134455 [2021-12-16 01:07:44,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 01:07:44,374 INFO L933 BasicCegarLoop]: 315 mSDtfsCounter, 252 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 01:07:44,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 588 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:07:44,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134455 states.