./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.03.cil-2.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/combinations/pc_sfifo_3.cil+token_ring.03.cil-2.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 53b2835bffc5e46db9e843d7a27e5dc2af58bf47930b3bc6dacf70c618d5bd01 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 21:07:52,126 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 21:07:52,127 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 21:07:52,157 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 21:07:52,158 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 21:07:52,165 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 21:07:52,167 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 21:07:52,176 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 21:07:52,178 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 21:07:52,182 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 21:07:52,183 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 21:07:52,184 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 21:07:52,184 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 21:07:52,186 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 21:07:52,187 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 21:07:52,189 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 21:07:52,192 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 21:07:52,193 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 21:07:52,194 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 21:07:52,196 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 21:07:52,199 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 21:07:52,200 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 21:07:52,201 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 21:07:52,202 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 21:07:52,205 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 21:07:52,206 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 21:07:52,206 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 21:07:52,207 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 21:07:52,207 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 21:07:52,208 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 21:07:52,208 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 21:07:52,209 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 21:07:52,210 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 21:07:52,211 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 21:07:52,212 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 21:07:52,212 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 21:07:52,212 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 21:07:52,213 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 21:07:52,213 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 21:07:52,213 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 21:07:52,214 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 21:07:52,215 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 21:07:52,246 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 21:07:52,247 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 21:07:52,247 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 21:07:52,248 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 21:07:52,248 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 21:07:52,249 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 21:07:52,249 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 21:07:52,249 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 21:07:52,249 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 21:07:52,250 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 21:07:52,250 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 21:07:52,250 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 21:07:52,251 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 21:07:52,251 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 21:07:52,251 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 21:07:52,251 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 21:07:52,251 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 21:07:52,251 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 21:07:52,251 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 21:07:52,252 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 21:07:52,252 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 21:07:52,252 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 21:07:52,252 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 21:07:52,252 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 21:07:52,252 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 21:07:52,253 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 21:07:52,253 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 21:07:52,253 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 21:07:52,253 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 21:07:52,253 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 21:07:52,253 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 21:07:52,254 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 21:07:52,254 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 21:07:52,254 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 21:07:52,254 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 53b2835bffc5e46db9e843d7a27e5dc2af58bf47930b3bc6dacf70c618d5bd01 [2021-12-17 21:07:52,488 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 21:07:52,520 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 21:07:52,522 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 21:07:52,523 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 21:07:52,524 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 21:07:52,525 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.03.cil-2.c [2021-12-17 21:07:52,591 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/13d240e71/25701a8164614f9a9f49cb11a65e043c/FLAG935d0a7e9 [2021-12-17 21:07:53,006 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 21:07:53,007 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.03.cil-2.c [2021-12-17 21:07:53,017 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/13d240e71/25701a8164614f9a9f49cb11a65e043c/FLAG935d0a7e9 [2021-12-17 21:07:53,026 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/13d240e71/25701a8164614f9a9f49cb11a65e043c [2021-12-17 21:07:53,028 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 21:07:53,029 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 21:07:53,030 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 21:07:53,030 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 21:07:53,045 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 21:07:53,046 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 09:07:53" (1/1) ... [2021-12-17 21:07:53,047 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fadd7a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:07:53, skipping insertion in model container [2021-12-17 21:07:53,047 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 09:07:53" (1/1) ... [2021-12-17 21:07:53,053 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 21:07:53,090 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 21:07:53,184 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.03.cil-2.c[911,924] [2021-12-17 21:07:53,255 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.03.cil-2.c[8416,8429] [2021-12-17 21:07:53,286 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 21:07:53,294 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 21:07:53,306 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.03.cil-2.c[911,924] [2021-12-17 21:07:53,333 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.03.cil-2.c[8416,8429] [2021-12-17 21:07:53,350 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 21:07:53,362 INFO L208 MainTranslator]: Completed translation [2021-12-17 21:07:53,363 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:07:53 WrapperNode [2021-12-17 21:07:53,363 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 21:07:53,364 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 21:07:53,364 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 21:07:53,364 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 21:07:53,372 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:07:53" (1/1) ... [2021-12-17 21:07:53,382 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:07:53" (1/1) ... [2021-12-17 21:07:53,419 INFO L137 Inliner]: procedures = 61, calls = 70, calls flagged for inlining = 30, calls inlined = 30, statements flattened = 556 [2021-12-17 21:07:53,420 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 21:07:53,420 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 21:07:53,421 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 21:07:53,421 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 21:07:53,428 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:07:53" (1/1) ... [2021-12-17 21:07:53,429 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:07:53" (1/1) ... [2021-12-17 21:07:53,432 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:07:53" (1/1) ... [2021-12-17 21:07:53,432 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:07:53" (1/1) ... [2021-12-17 21:07:53,439 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:07:53" (1/1) ... [2021-12-17 21:07:53,446 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:07:53" (1/1) ... [2021-12-17 21:07:53,448 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:07:53" (1/1) ... [2021-12-17 21:07:53,452 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 21:07:53,453 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 21:07:53,453 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 21:07:53,453 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 21:07:53,454 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:07:53" (1/1) ... [2021-12-17 21:07:53,458 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 21:07:53,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 21:07:53,497 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) [2021-12-17 21:07:53,542 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 [2021-12-17 21:07:53,548 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 21:07:53,548 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-17 21:07:53,548 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-17 21:07:53,548 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2021-12-17 21:07:53,549 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2021-12-17 21:07:53,550 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-17 21:07:53,550 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-17 21:07:53,550 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-17 21:07:53,550 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-17 21:07:53,550 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2021-12-17 21:07:53,550 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2021-12-17 21:07:53,551 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-17 21:07:53,551 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-17 21:07:53,551 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-17 21:07:53,552 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-17 21:07:53,552 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2021-12-17 21:07:53,552 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2021-12-17 21:07:53,552 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2021-12-17 21:07:53,553 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2021-12-17 21:07:53,553 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2021-12-17 21:07:53,553 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2021-12-17 21:07:53,553 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-17 21:07:53,554 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-17 21:07:53,554 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 21:07:53,554 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-17 21:07:53,554 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-17 21:07:53,554 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2021-12-17 21:07:53,554 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2021-12-17 21:07:53,554 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 21:07:53,555 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 21:07:53,555 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-17 21:07:53,555 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-17 21:07:53,650 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 21:07:53,652 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 21:07:54,098 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##56: assume !(1 == ~q_free~0); [2021-12-17 21:07:54,099 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##55: assume 1 == ~q_free~0;~c_dr_st~0 := 2;~c_dr_pc~0 := 2;~a_t~0 := do_read_c_~a~0#1; [2021-12-17 21:07:54,164 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 21:07:54,170 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 21:07:54,171 INFO L301 CfgBuilder]: Removed 10 assume(true) statements. [2021-12-17 21:07:54,172 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 09:07:54 BoogieIcfgContainer [2021-12-17 21:07:54,172 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 21:07:54,174 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 21:07:54,174 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 21:07:54,181 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 21:07:54,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 09:07:53" (1/3) ... [2021-12-17 21:07:54,182 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@408d8b09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 09:07:54, skipping insertion in model container [2021-12-17 21:07:54,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:07:53" (2/3) ... [2021-12-17 21:07:54,182 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@408d8b09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 09:07:54, skipping insertion in model container [2021-12-17 21:07:54,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 09:07:54" (3/3) ... [2021-12-17 21:07:54,185 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_3.cil+token_ring.03.cil-2.c [2021-12-17 21:07:54,189 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 21:07:54,189 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-17 21:07:54,241 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 21:07:54,247 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 [2021-12-17 21:07:54,247 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-17 21:07:54,277 INFO L276 IsEmpty]: Start isEmpty. Operand has 274 states, 224 states have (on average 1.5714285714285714) internal successors, (352), 230 states have internal predecessors, (352), 33 states have call successors, (33), 14 states have call predecessors, (33), 14 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2021-12-17 21:07:54,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-17 21:07:54,287 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:07:54,288 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:07:54,289 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:07:54,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:07:54,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1569523181, now seen corresponding path program 1 times [2021-12-17 21:07:54,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:07:54,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524270740] [2021-12-17 21:07:54,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:07:54,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:07:54,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:54,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:07:54,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:54,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:07:54,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:54,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:07:54,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:54,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:07:54,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:54,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:07:54,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:54,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 21:07:54,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:54,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 21:07:54,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:54,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:07:54,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:07:54,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524270740] [2021-12-17 21:07:54,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524270740] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:07:54,626 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:07:54,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 21:07:54,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431168286] [2021-12-17 21:07:54,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:07:54,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 21:07:54,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:07:54,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 21:07:54,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:07:54,663 INFO L87 Difference]: Start difference. First operand has 274 states, 224 states have (on average 1.5714285714285714) internal successors, (352), 230 states have internal predecessors, (352), 33 states have call successors, (33), 14 states have call predecessors, (33), 14 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-17 21:07:55,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:07:55,497 INFO L93 Difference]: Finished difference Result 680 states and 1041 transitions. [2021-12-17 21:07:55,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 21:07:55,500 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-17 21:07:55,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:07:55,524 INFO L225 Difference]: With dead ends: 680 [2021-12-17 21:07:55,524 INFO L226 Difference]: Without dead ends: 415 [2021-12-17 21:07:55,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-12-17 21:07:55,530 INFO L933 BasicCegarLoop]: 398 mSDtfsCounter, 549 mSDsluCounter, 1146 mSDsCounter, 0 mSdLazyCounter, 771 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 556 SdHoareTripleChecker+Valid, 1544 SdHoareTripleChecker+Invalid, 901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 21:07:55,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [556 Valid, 1544 Invalid, 901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 771 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 21:07:55,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-12-17 21:07:55,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 376. [2021-12-17 21:07:55,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 306 states have (on average 1.4607843137254901) internal successors, (447), 312 states have internal predecessors, (447), 46 states have call successors, (46), 21 states have call predecessors, (46), 22 states have return successors, (49), 45 states have call predecessors, (49), 44 states have call successors, (49) [2021-12-17 21:07:55,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 542 transitions. [2021-12-17 21:07:55,596 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 542 transitions. Word has length 65 [2021-12-17 21:07:55,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:07:55,596 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 542 transitions. [2021-12-17 21:07:55,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-17 21:07:55,597 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 542 transitions. [2021-12-17 21:07:55,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-17 21:07:55,600 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:07:55,600 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:07:55,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 21:07:55,601 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:07:55,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:07:55,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1046555475, now seen corresponding path program 1 times [2021-12-17 21:07:55,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:07:55,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920921839] [2021-12-17 21:07:55,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:07:55,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:07:55,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:55,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:07:55,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:55,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:07:55,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:55,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:07:55,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:55,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:07:55,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:55,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:07:55,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:55,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 21:07:55,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:55,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 21:07:55,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:55,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:07:55,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:07:55,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920921839] [2021-12-17 21:07:55,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920921839] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:07:55,700 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:07:55,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 21:07:55,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763957197] [2021-12-17 21:07:55,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:07:55,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 21:07:55,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:07:55,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 21:07:55,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:07:55,703 INFO L87 Difference]: Start difference. First operand 376 states and 542 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-17 21:07:56,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:07:56,457 INFO L93 Difference]: Finished difference Result 773 states and 1108 transitions. [2021-12-17 21:07:56,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-17 21:07:56,457 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-17 21:07:56,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:07:56,468 INFO L225 Difference]: With dead ends: 773 [2021-12-17 21:07:56,469 INFO L226 Difference]: Without dead ends: 564 [2021-12-17 21:07:56,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-12-17 21:07:56,477 INFO L933 BasicCegarLoop]: 470 mSDtfsCounter, 752 mSDsluCounter, 1276 mSDsCounter, 0 mSdLazyCounter, 1003 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 777 SdHoareTripleChecker+Valid, 1746 SdHoareTripleChecker+Invalid, 1122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 1003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 21:07:56,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [777 Valid, 1746 Invalid, 1122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 1003 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 21:07:56,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2021-12-17 21:07:56,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 488. [2021-12-17 21:07:56,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 396 states have (on average 1.446969696969697) internal successors, (573), 404 states have internal predecessors, (573), 59 states have call successors, (59), 28 states have call predecessors, (59), 31 states have return successors, (70), 59 states have call predecessors, (70), 57 states have call successors, (70) [2021-12-17 21:07:56,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 702 transitions. [2021-12-17 21:07:56,547 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 702 transitions. Word has length 65 [2021-12-17 21:07:56,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:07:56,547 INFO L470 AbstractCegarLoop]: Abstraction has 488 states and 702 transitions. [2021-12-17 21:07:56,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-17 21:07:56,548 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 702 transitions. [2021-12-17 21:07:56,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-17 21:07:56,555 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:07:56,555 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:07:56,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 21:07:56,556 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:07:56,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:07:56,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1219825711, now seen corresponding path program 1 times [2021-12-17 21:07:56,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:07:56,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801967894] [2021-12-17 21:07:56,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:07:56,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:07:56,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:56,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:07:56,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:56,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:07:56,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:56,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:07:56,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:56,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:07:56,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:56,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:07:56,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:56,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 21:07:56,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:56,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 21:07:56,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:56,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:07:56,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:07:56,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801967894] [2021-12-17 21:07:56,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801967894] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:07:56,643 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:07:56,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-17 21:07:56,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783334646] [2021-12-17 21:07:56,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:07:56,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 21:07:56,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:07:56,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 21:07:56,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-17 21:07:56,644 INFO L87 Difference]: Start difference. First operand 488 states and 702 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2021-12-17 21:07:58,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:07:58,036 INFO L93 Difference]: Finished difference Result 2034 states and 2900 transitions. [2021-12-17 21:07:58,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-17 21:07:58,037 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) Word has length 65 [2021-12-17 21:07:58,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:07:58,045 INFO L225 Difference]: With dead ends: 2034 [2021-12-17 21:07:58,046 INFO L226 Difference]: Without dead ends: 1701 [2021-12-17 21:07:58,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2021-12-17 21:07:58,049 INFO L933 BasicCegarLoop]: 526 mSDtfsCounter, 2250 mSDsluCounter, 1550 mSDsCounter, 0 mSdLazyCounter, 1645 mSolverCounterSat, 588 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2268 SdHoareTripleChecker+Valid, 2076 SdHoareTripleChecker+Invalid, 2233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 588 IncrementalHoareTripleChecker+Valid, 1645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-17 21:07:58,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2268 Valid, 2076 Invalid, 2233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [588 Valid, 1645 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-17 21:07:58,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1701 states. [2021-12-17 21:07:58,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1701 to 1541. [2021-12-17 21:07:58,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1541 states, 1244 states have (on average 1.380225080385852) internal successors, (1717), 1267 states have internal predecessors, (1717), 169 states have call successors, (169), 111 states have call predecessors, (169), 126 states have return successors, (203), 165 states have call predecessors, (203), 167 states have call successors, (203) [2021-12-17 21:07:58,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1541 states to 1541 states and 2089 transitions. [2021-12-17 21:07:58,133 INFO L78 Accepts]: Start accepts. Automaton has 1541 states and 2089 transitions. Word has length 65 [2021-12-17 21:07:58,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:07:58,134 INFO L470 AbstractCegarLoop]: Abstraction has 1541 states and 2089 transitions. [2021-12-17 21:07:58,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2021-12-17 21:07:58,134 INFO L276 IsEmpty]: Start isEmpty. Operand 1541 states and 2089 transitions. [2021-12-17 21:07:58,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-17 21:07:58,135 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:07:58,135 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] [2021-12-17 21:07:58,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 21:07:58,135 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:07:58,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:07:58,136 INFO L85 PathProgramCache]: Analyzing trace with hash 44002010, now seen corresponding path program 1 times [2021-12-17 21:07:58,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:07:58,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018290908] [2021-12-17 21:07:58,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:07:58,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:07:58,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:58,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:07:58,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:58,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:07:58,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:58,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:07:58,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:58,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:07:58,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:58,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 21:07:58,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:58,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-17 21:07:58,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:58,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-17 21:07:58,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:58,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:07:58,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:07:58,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018290908] [2021-12-17 21:07:58,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018290908] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:07:58,284 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:07:58,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-17 21:07:58,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560279890] [2021-12-17 21:07:58,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:07:58,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 21:07:58,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:07:58,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 21:07:58,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-17 21:07:58,287 INFO L87 Difference]: Start difference. First operand 1541 states and 2089 transitions. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 21:07:58,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:07:58,859 INFO L93 Difference]: Finished difference Result 3069 states and 4168 transitions. [2021-12-17 21:07:58,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 21:07:58,860 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2021-12-17 21:07:58,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:07:58,866 INFO L225 Difference]: With dead ends: 3069 [2021-12-17 21:07:58,866 INFO L226 Difference]: Without dead ends: 1689 [2021-12-17 21:07:58,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 21:07:58,870 INFO L933 BasicCegarLoop]: 371 mSDtfsCounter, 452 mSDsluCounter, 1291 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 1662 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 21:07:58,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [453 Valid, 1662 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 750 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 21:07:58,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1689 states. [2021-12-17 21:07:58,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1689 to 1581. [2021-12-17 21:07:58,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1581 states, 1276 states have (on average 1.365987460815047) internal successors, (1743), 1299 states have internal predecessors, (1743), 169 states have call successors, (169), 111 states have call predecessors, (169), 134 states have return successors, (211), 173 states have call predecessors, (211), 167 states have call successors, (211) [2021-12-17 21:07:58,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1581 states to 1581 states and 2123 transitions. [2021-12-17 21:07:58,962 INFO L78 Accepts]: Start accepts. Automaton has 1581 states and 2123 transitions. Word has length 66 [2021-12-17 21:07:58,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:07:58,962 INFO L470 AbstractCegarLoop]: Abstraction has 1581 states and 2123 transitions. [2021-12-17 21:07:58,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 21:07:58,963 INFO L276 IsEmpty]: Start isEmpty. Operand 1581 states and 2123 transitions. [2021-12-17 21:07:58,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-17 21:07:58,964 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:07:58,965 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] [2021-12-17 21:07:58,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 21:07:58,965 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:07:58,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:07:58,966 INFO L85 PathProgramCache]: Analyzing trace with hash -985357288, now seen corresponding path program 1 times [2021-12-17 21:07:58,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:07:58,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551741490] [2021-12-17 21:07:58,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:07:58,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:07:58,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:59,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:07:59,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:59,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:07:59,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:59,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:07:59,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:59,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:07:59,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:59,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 21:07:59,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:59,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-17 21:07:59,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:59,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-17 21:07:59,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:59,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:07:59,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:07:59,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551741490] [2021-12-17 21:07:59,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551741490] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:07:59,101 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:07:59,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-17 21:07:59,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469123538] [2021-12-17 21:07:59,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:07:59,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 21:07:59,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:07:59,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 21:07:59,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-17 21:07:59,103 INFO L87 Difference]: Start difference. First operand 1581 states and 2123 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-17 21:08:00,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:08:00,335 INFO L93 Difference]: Finished difference Result 5153 states and 6997 transitions. [2021-12-17 21:08:00,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-17 21:08:00,335 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 66 [2021-12-17 21:08:00,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:08:00,342 INFO L225 Difference]: With dead ends: 5153 [2021-12-17 21:08:00,343 INFO L226 Difference]: Without dead ends: 1972 [2021-12-17 21:08:00,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2021-12-17 21:08:00,350 INFO L933 BasicCegarLoop]: 517 mSDtfsCounter, 2319 mSDsluCounter, 1599 mSDsCounter, 0 mSdLazyCounter, 1579 mSolverCounterSat, 597 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2337 SdHoareTripleChecker+Valid, 2116 SdHoareTripleChecker+Invalid, 2176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 597 IncrementalHoareTripleChecker+Valid, 1579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-17 21:08:00,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2337 Valid, 2116 Invalid, 2176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [597 Valid, 1579 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-17 21:08:00,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1972 states. [2021-12-17 21:08:00,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1972 to 1792. [2021-12-17 21:08:00,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1792 states, 1415 states have (on average 1.3208480565371026) internal successors, (1869), 1440 states have internal predecessors, (1869), 209 states have call successors, (209), 139 states have call predecessors, (209), 166 states have return successors, (257), 215 states have call predecessors, (257), 207 states have call successors, (257) [2021-12-17 21:08:00,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1792 states to 1792 states and 2335 transitions. [2021-12-17 21:08:00,430 INFO L78 Accepts]: Start accepts. Automaton has 1792 states and 2335 transitions. Word has length 66 [2021-12-17 21:08:00,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:08:00,430 INFO L470 AbstractCegarLoop]: Abstraction has 1792 states and 2335 transitions. [2021-12-17 21:08:00,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-17 21:08:00,430 INFO L276 IsEmpty]: Start isEmpty. Operand 1792 states and 2335 transitions. [2021-12-17 21:08:00,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 21:08:00,431 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:08:00,432 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] [2021-12-17 21:08:00,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 21:08:00,432 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:08:00,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:08:00,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1962986806, now seen corresponding path program 1 times [2021-12-17 21:08:00,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:08:00,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117449930] [2021-12-17 21:08:00,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:08:00,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:08:00,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:00,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:08:00,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:00,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 21:08:00,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:00,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 21:08:00,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:00,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 21:08:00,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:00,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 21:08:00,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:00,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:08:00,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:08:00,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117449930] [2021-12-17 21:08:00,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117449930] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:08:00,501 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:08:00,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 21:08:00,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316170895] [2021-12-17 21:08:00,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:08:00,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 21:08:00,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:08:00,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 21:08:00,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 21:08:00,503 INFO L87 Difference]: Start difference. First operand 1792 states and 2335 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 3 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 21:08:00,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:08:00,916 INFO L93 Difference]: Finished difference Result 1979 states and 2623 transitions. [2021-12-17 21:08:00,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 21:08:00,916 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 3 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2021-12-17 21:08:00,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:08:00,922 INFO L225 Difference]: With dead ends: 1979 [2021-12-17 21:08:00,923 INFO L226 Difference]: Without dead ends: 1835 [2021-12-17 21:08:00,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-17 21:08:00,924 INFO L933 BasicCegarLoop]: 389 mSDtfsCounter, 465 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 772 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 21:08:00,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [480 Valid, 772 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 21:08:00,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1835 states. [2021-12-17 21:08:00,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1835 to 1792. [2021-12-17 21:08:00,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1792 states, 1415 states have (on average 1.3201413427561837) internal successors, (1868), 1440 states have internal predecessors, (1868), 209 states have call successors, (209), 139 states have call predecessors, (209), 166 states have return successors, (257), 215 states have call predecessors, (257), 207 states have call successors, (257) [2021-12-17 21:08:00,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1792 states to 1792 states and 2334 transitions. [2021-12-17 21:08:00,995 INFO L78 Accepts]: Start accepts. Automaton has 1792 states and 2334 transitions. Word has length 79 [2021-12-17 21:08:00,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:08:00,995 INFO L470 AbstractCegarLoop]: Abstraction has 1792 states and 2334 transitions. [2021-12-17 21:08:00,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 3 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 21:08:00,995 INFO L276 IsEmpty]: Start isEmpty. Operand 1792 states and 2334 transitions. [2021-12-17 21:08:00,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 21:08:00,996 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:08:00,996 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] [2021-12-17 21:08:00,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 21:08:00,997 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:08:00,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:08:00,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1839354316, now seen corresponding path program 1 times [2021-12-17 21:08:00,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:08:00,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829223520] [2021-12-17 21:08:00,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:08:00,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:08:01,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:01,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:08:01,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:01,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 21:08:01,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:01,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 21:08:01,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:01,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 21:08:01,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:01,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 21:08:01,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:01,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:08:01,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:08:01,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829223520] [2021-12-17 21:08:01,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829223520] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:08:01,053 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:08:01,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 21:08:01,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907764437] [2021-12-17 21:08:01,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:08:01,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 21:08:01,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:08:01,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 21:08:01,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 21:08:01,055 INFO L87 Difference]: Start difference. First operand 1792 states and 2334 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 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) [2021-12-17 21:08:01,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:08:01,794 INFO L93 Difference]: Finished difference Result 2160 states and 2901 transitions. [2021-12-17 21:08:01,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 21:08:01,795 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 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 79 [2021-12-17 21:08:01,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:08:01,804 INFO L225 Difference]: With dead ends: 2160 [2021-12-17 21:08:01,804 INFO L226 Difference]: Without dead ends: 2019 [2021-12-17 21:08:01,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-17 21:08:01,808 INFO L933 BasicCegarLoop]: 393 mSDtfsCounter, 762 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 784 SdHoareTripleChecker+Valid, 994 SdHoareTripleChecker+Invalid, 910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 21:08:01,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [784 Valid, 994 Invalid, 910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 790 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 21:08:01,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2019 states. [2021-12-17 21:08:01,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2019 to 1934. [2021-12-17 21:08:01,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1934 states, 1538 states have (on average 1.336150845253576) internal successors, (2055), 1564 states have internal predecessors, (2055), 221 states have call successors, (221), 145 states have call predecessors, (221), 173 states have return successors, (272), 227 states have call predecessors, (272), 219 states have call successors, (272) [2021-12-17 21:08:01,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1934 states to 1934 states and 2548 transitions. [2021-12-17 21:08:01,906 INFO L78 Accepts]: Start accepts. Automaton has 1934 states and 2548 transitions. Word has length 79 [2021-12-17 21:08:01,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:08:01,906 INFO L470 AbstractCegarLoop]: Abstraction has 1934 states and 2548 transitions. [2021-12-17 21:08:01,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 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) [2021-12-17 21:08:01,907 INFO L276 IsEmpty]: Start isEmpty. Operand 1934 states and 2548 transitions. [2021-12-17 21:08:01,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 21:08:01,908 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:08:01,908 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] [2021-12-17 21:08:01,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 21:08:01,908 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:08:01,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:08:01,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1602306120, now seen corresponding path program 1 times [2021-12-17 21:08:01,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:08:01,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100606576] [2021-12-17 21:08:01,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:08:01,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:08:01,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:01,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:08:01,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:01,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 21:08:01,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:01,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 21:08:01,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:01,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 21:08:01,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:01,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 21:08:01,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:01,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:08:01,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:08:01,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100606576] [2021-12-17 21:08:01,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100606576] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:08:01,966 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:08:01,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:08:01,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142283031] [2021-12-17 21:08:01,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:08:01,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:08:01,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:08:01,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:08:01,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:08:01,968 INFO L87 Difference]: Start difference. First operand 1934 states and 2548 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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) [2021-12-17 21:08:02,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:08:02,478 INFO L93 Difference]: Finished difference Result 2306 states and 3123 transitions. [2021-12-17 21:08:02,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 21:08:02,478 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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 79 [2021-12-17 21:08:02,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:08:02,485 INFO L225 Difference]: With dead ends: 2306 [2021-12-17 21:08:02,485 INFO L226 Difference]: Without dead ends: 2023 [2021-12-17 21:08:02,486 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 [2021-12-17 21:08:02,487 INFO L933 BasicCegarLoop]: 354 mSDtfsCounter, 739 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 762 SdHoareTripleChecker+Valid, 823 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 21:08:02,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [762 Valid, 823 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 21:08:02,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2023 states. [2021-12-17 21:08:02,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2023 to 1934. [2021-12-17 21:08:02,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1934 states, 1538 states have (on average 1.334850455136541) internal successors, (2053), 1564 states have internal predecessors, (2053), 221 states have call successors, (221), 145 states have call predecessors, (221), 173 states have return successors, (272), 227 states have call predecessors, (272), 219 states have call successors, (272) [2021-12-17 21:08:02,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1934 states to 1934 states and 2546 transitions. [2021-12-17 21:08:02,562 INFO L78 Accepts]: Start accepts. Automaton has 1934 states and 2546 transitions. Word has length 79 [2021-12-17 21:08:02,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:08:02,563 INFO L470 AbstractCegarLoop]: Abstraction has 1934 states and 2546 transitions. [2021-12-17 21:08:02,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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) [2021-12-17 21:08:02,564 INFO L276 IsEmpty]: Start isEmpty. Operand 1934 states and 2546 transitions. [2021-12-17 21:08:02,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 21:08:02,565 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:08:02,565 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] [2021-12-17 21:08:02,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 21:08:02,565 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:08:02,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:08:02,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1656699018, now seen corresponding path program 1 times [2021-12-17 21:08:02,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:08:02,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831088161] [2021-12-17 21:08:02,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:08:02,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:08:02,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:02,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:08:02,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:02,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 21:08:02,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:02,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 21:08:02,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:02,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 21:08:02,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:02,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 21:08:02,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:02,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:08:02,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:08:02,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831088161] [2021-12-17 21:08:02,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831088161] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:08:02,633 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:08:02,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:08:02,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854266666] [2021-12-17 21:08:02,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:08:02,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:08:02,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:08:02,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:08:02,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:08:02,634 INFO L87 Difference]: Start difference. First operand 1934 states and 2546 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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) [2021-12-17 21:08:03,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:08:03,156 INFO L93 Difference]: Finished difference Result 2304 states and 3114 transitions. [2021-12-17 21:08:03,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 21:08:03,156 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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 79 [2021-12-17 21:08:03,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:08:03,163 INFO L225 Difference]: With dead ends: 2304 [2021-12-17 21:08:03,164 INFO L226 Difference]: Without dead ends: 2021 [2021-12-17 21:08:03,165 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 [2021-12-17 21:08:03,167 INFO L933 BasicCegarLoop]: 339 mSDtfsCounter, 757 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 780 SdHoareTripleChecker+Valid, 806 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 21:08:03,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [780 Valid, 806 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 21:08:03,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2021 states. [2021-12-17 21:08:03,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2021 to 1934. [2021-12-17 21:08:03,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1934 states, 1538 states have (on average 1.3335500650195058) internal successors, (2051), 1564 states have internal predecessors, (2051), 221 states have call successors, (221), 145 states have call predecessors, (221), 173 states have return successors, (272), 227 states have call predecessors, (272), 219 states have call successors, (272) [2021-12-17 21:08:03,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1934 states to 1934 states and 2544 transitions. [2021-12-17 21:08:03,260 INFO L78 Accepts]: Start accepts. Automaton has 1934 states and 2544 transitions. Word has length 79 [2021-12-17 21:08:03,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:08:03,260 INFO L470 AbstractCegarLoop]: Abstraction has 1934 states and 2544 transitions. [2021-12-17 21:08:03,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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) [2021-12-17 21:08:03,261 INFO L276 IsEmpty]: Start isEmpty. Operand 1934 states and 2544 transitions. [2021-12-17 21:08:03,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 21:08:03,262 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:08:03,262 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] [2021-12-17 21:08:03,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 21:08:03,262 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:08:03,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:08:03,263 INFO L85 PathProgramCache]: Analyzing trace with hash -2074095624, now seen corresponding path program 1 times [2021-12-17 21:08:03,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:08:03,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566239888] [2021-12-17 21:08:03,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:08:03,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:08:03,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:03,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:08:03,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:03,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 21:08:03,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:03,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 21:08:03,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:03,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 21:08:03,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:03,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 21:08:03,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:03,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:08:03,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:08:03,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566239888] [2021-12-17 21:08:03,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566239888] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:08:03,325 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:08:03,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:08:03,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106572767] [2021-12-17 21:08:03,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:08:03,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:08:03,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:08:03,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:08:03,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:08:03,326 INFO L87 Difference]: Start difference. First operand 1934 states and 2544 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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) [2021-12-17 21:08:03,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:08:03,824 INFO L93 Difference]: Finished difference Result 2301 states and 3103 transitions. [2021-12-17 21:08:03,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 21:08:03,825 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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 79 [2021-12-17 21:08:03,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:08:03,831 INFO L225 Difference]: With dead ends: 2301 [2021-12-17 21:08:03,831 INFO L226 Difference]: Without dead ends: 2018 [2021-12-17 21:08:03,833 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 [2021-12-17 21:08:03,833 INFO L933 BasicCegarLoop]: 348 mSDtfsCounter, 619 mSDsluCounter, 609 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 642 SdHoareTripleChecker+Valid, 957 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 21:08:03,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [642 Valid, 957 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 21:08:03,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2018 states. [2021-12-17 21:08:03,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2018 to 1934. [2021-12-17 21:08:03,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1934 states, 1538 states have (on average 1.3322496749024708) internal successors, (2049), 1564 states have internal predecessors, (2049), 221 states have call successors, (221), 145 states have call predecessors, (221), 173 states have return successors, (272), 227 states have call predecessors, (272), 219 states have call successors, (272) [2021-12-17 21:08:03,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1934 states to 1934 states and 2542 transitions. [2021-12-17 21:08:03,914 INFO L78 Accepts]: Start accepts. Automaton has 1934 states and 2542 transitions. Word has length 79 [2021-12-17 21:08:03,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:08:03,914 INFO L470 AbstractCegarLoop]: Abstraction has 1934 states and 2542 transitions. [2021-12-17 21:08:03,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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) [2021-12-17 21:08:03,915 INFO L276 IsEmpty]: Start isEmpty. Operand 1934 states and 2542 transitions. [2021-12-17 21:08:03,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 21:08:03,916 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:08:03,916 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] [2021-12-17 21:08:03,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-17 21:08:03,917 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:08:03,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:08:03,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1394823370, now seen corresponding path program 1 times [2021-12-17 21:08:03,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:08:03,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880345196] [2021-12-17 21:08:03,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:08:03,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:08:03,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:03,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:08:03,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:03,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 21:08:03,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:03,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 21:08:03,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:03,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 21:08:03,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:03,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 21:08:03,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:03,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:08:03,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:08:03,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880345196] [2021-12-17 21:08:03,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880345196] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:08:03,993 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:08:03,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:08:03,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134727039] [2021-12-17 21:08:03,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:08:03,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:08:03,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:08:03,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:08:03,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:08:03,994 INFO L87 Difference]: Start difference. First operand 1934 states and 2542 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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) [2021-12-17 21:08:04,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:08:04,977 INFO L93 Difference]: Finished difference Result 2525 states and 3424 transitions. [2021-12-17 21:08:04,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 21:08:04,978 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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 79 [2021-12-17 21:08:04,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:08:04,985 INFO L225 Difference]: With dead ends: 2525 [2021-12-17 21:08:04,986 INFO L226 Difference]: Without dead ends: 2242 [2021-12-17 21:08:04,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-17 21:08:04,988 INFO L933 BasicCegarLoop]: 532 mSDtfsCounter, 761 mSDsluCounter, 1004 mSDsCounter, 0 mSdLazyCounter, 1371 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 782 SdHoareTripleChecker+Valid, 1536 SdHoareTripleChecker+Invalid, 1470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-17 21:08:04,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [782 Valid, 1536 Invalid, 1470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1371 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-17 21:08:04,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2242 states. [2021-12-17 21:08:05,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2242 to 2064. [2021-12-17 21:08:05,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2064 states, 1650 states have (on average 1.3412121212121213) internal successors, (2213), 1677 states have internal predecessors, (2213), 232 states have call successors, (232), 151 states have call predecessors, (232), 180 states have return successors, (285), 239 states have call predecessors, (285), 230 states have call successors, (285) [2021-12-17 21:08:05,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2064 states to 2064 states and 2730 transitions. [2021-12-17 21:08:05,081 INFO L78 Accepts]: Start accepts. Automaton has 2064 states and 2730 transitions. Word has length 79 [2021-12-17 21:08:05,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:08:05,081 INFO L470 AbstractCegarLoop]: Abstraction has 2064 states and 2730 transitions. [2021-12-17 21:08:05,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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) [2021-12-17 21:08:05,081 INFO L276 IsEmpty]: Start isEmpty. Operand 2064 states and 2730 transitions. [2021-12-17 21:08:05,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 21:08:05,083 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:08:05,084 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] [2021-12-17 21:08:05,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-17 21:08:05,084 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:08:05,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:08:05,085 INFO L85 PathProgramCache]: Analyzing trace with hash 566751288, now seen corresponding path program 1 times [2021-12-17 21:08:05,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:08:05,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326597417] [2021-12-17 21:08:05,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:08:05,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:08:05,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:05,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:08:05,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:05,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 21:08:05,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:05,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 21:08:05,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:05,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 21:08:05,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:05,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 21:08:05,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:05,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:08:05,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:08:05,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326597417] [2021-12-17 21:08:05,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326597417] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:08:05,151 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:08:05,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:08:05,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338131925] [2021-12-17 21:08:05,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:08:05,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:08:05,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:08:05,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:08:05,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:08:05,152 INFO L87 Difference]: Start difference. First operand 2064 states and 2730 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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) [2021-12-17 21:08:06,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:08:06,064 INFO L93 Difference]: Finished difference Result 3012 states and 4136 transitions. [2021-12-17 21:08:06,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 21:08:06,065 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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 79 [2021-12-17 21:08:06,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:08:06,073 INFO L225 Difference]: With dead ends: 3012 [2021-12-17 21:08:06,073 INFO L226 Difference]: Without dead ends: 2599 [2021-12-17 21:08:06,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-17 21:08:06,078 INFO L933 BasicCegarLoop]: 465 mSDtfsCounter, 823 mSDsluCounter, 997 mSDsCounter, 0 mSdLazyCounter, 1194 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 849 SdHoareTripleChecker+Valid, 1462 SdHoareTripleChecker+Invalid, 1302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 21:08:06,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [849 Valid, 1462 Invalid, 1302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1194 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 21:08:06,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2599 states. [2021-12-17 21:08:06,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2599 to 2313. [2021-12-17 21:08:06,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2313 states, 1864 states have (on average 1.3551502145922747) internal successors, (2526), 1893 states have internal predecessors, (2526), 253 states have call successors, (253), 163 states have call predecessors, (253), 194 states have return successors, (314), 262 states have call predecessors, (314), 251 states have call successors, (314) [2021-12-17 21:08:06,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2313 states to 2313 states and 3093 transitions. [2021-12-17 21:08:06,165 INFO L78 Accepts]: Start accepts. Automaton has 2313 states and 3093 transitions. Word has length 79 [2021-12-17 21:08:06,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:08:06,165 INFO L470 AbstractCegarLoop]: Abstraction has 2313 states and 3093 transitions. [2021-12-17 21:08:06,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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) [2021-12-17 21:08:06,165 INFO L276 IsEmpty]: Start isEmpty. Operand 2313 states and 3093 transitions. [2021-12-17 21:08:06,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 21:08:06,167 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:08:06,167 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] [2021-12-17 21:08:06,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-17 21:08:06,167 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:08:06,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:08:06,168 INFO L85 PathProgramCache]: Analyzing trace with hash 768575222, now seen corresponding path program 1 times [2021-12-17 21:08:06,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:08:06,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914760935] [2021-12-17 21:08:06,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:08:06,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:08:06,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:06,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:08:06,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:06,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 21:08:06,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:06,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 21:08:06,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:06,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 21:08:06,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:06,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 21:08:06,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:06,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:08:06,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:08:06,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914760935] [2021-12-17 21:08:06,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914760935] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:08:06,250 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:08:06,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:08:06,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699260523] [2021-12-17 21:08:06,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:08:06,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:08:06,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:08:06,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:08:06,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:08:06,251 INFO L87 Difference]: Start difference. First operand 2313 states and 3093 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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) [2021-12-17 21:08:07,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:08:07,172 INFO L93 Difference]: Finished difference Result 3839 states and 5343 transitions. [2021-12-17 21:08:07,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 21:08:07,173 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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 79 [2021-12-17 21:08:07,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:08:07,183 INFO L225 Difference]: With dead ends: 3839 [2021-12-17 21:08:07,183 INFO L226 Difference]: Without dead ends: 3177 [2021-12-17 21:08:07,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-17 21:08:07,186 INFO L933 BasicCegarLoop]: 459 mSDtfsCounter, 741 mSDsluCounter, 1000 mSDsCounter, 0 mSdLazyCounter, 1172 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 767 SdHoareTripleChecker+Valid, 1459 SdHoareTripleChecker+Invalid, 1279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 21:08:07,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [767 Valid, 1459 Invalid, 1279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1172 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 21:08:07,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3177 states. [2021-12-17 21:08:07,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3177 to 2822. [2021-12-17 21:08:07,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2822 states, 2305 states have (on average 1.377874186550976) internal successors, (3176), 2338 states have internal predecessors, (3176), 293 states have call successors, (293), 187 states have call predecessors, (293), 222 states have return successors, (376), 306 states have call predecessors, (376), 291 states have call successors, (376) [2021-12-17 21:08:07,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2822 states to 2822 states and 3845 transitions. [2021-12-17 21:08:07,331 INFO L78 Accepts]: Start accepts. Automaton has 2822 states and 3845 transitions. Word has length 79 [2021-12-17 21:08:07,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:08:07,331 INFO L470 AbstractCegarLoop]: Abstraction has 2822 states and 3845 transitions. [2021-12-17 21:08:07,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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) [2021-12-17 21:08:07,332 INFO L276 IsEmpty]: Start isEmpty. Operand 2822 states and 3845 transitions. [2021-12-17 21:08:07,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 21:08:07,333 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:08:07,333 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] [2021-12-17 21:08:07,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-17 21:08:07,334 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:08:07,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:08:07,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1202304308, now seen corresponding path program 1 times [2021-12-17 21:08:07,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:08:07,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357174484] [2021-12-17 21:08:07,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:08:07,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:08:07,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:07,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:08:07,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:07,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 21:08:07,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:07,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 21:08:07,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:07,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 21:08:07,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:07,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 21:08:07,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:07,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:08:07,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:08:07,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357174484] [2021-12-17 21:08:07,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357174484] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:08:07,404 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:08:07,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:08:07,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696769085] [2021-12-17 21:08:07,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:08:07,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:08:07,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:08:07,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:08:07,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:08:07,405 INFO L87 Difference]: Start difference. First operand 2822 states and 3845 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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) [2021-12-17 21:08:08,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:08:08,186 INFO L93 Difference]: Finished difference Result 4788 states and 6767 transitions. [2021-12-17 21:08:08,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 21:08:08,186 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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 79 [2021-12-17 21:08:08,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:08:08,218 INFO L225 Difference]: With dead ends: 4788 [2021-12-17 21:08:08,219 INFO L226 Difference]: Without dead ends: 3618 [2021-12-17 21:08:08,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-12-17 21:08:08,223 INFO L933 BasicCegarLoop]: 362 mSDtfsCounter, 467 mSDsluCounter, 999 mSDsCounter, 0 mSdLazyCounter, 829 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 1361 SdHoareTripleChecker+Invalid, 907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 21:08:08,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [467 Valid, 1361 Invalid, 907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 829 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 21:08:08,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3618 states. [2021-12-17 21:08:08,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3618 to 2849. [2021-12-17 21:08:08,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2849 states, 2332 states have (on average 1.3734991423670668) internal successors, (3203), 2365 states have internal predecessors, (3203), 293 states have call successors, (293), 187 states have call predecessors, (293), 222 states have return successors, (376), 306 states have call predecessors, (376), 291 states have call successors, (376) [2021-12-17 21:08:08,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2849 states to 2849 states and 3872 transitions. [2021-12-17 21:08:08,369 INFO L78 Accepts]: Start accepts. Automaton has 2849 states and 3872 transitions. Word has length 79 [2021-12-17 21:08:08,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:08:08,369 INFO L470 AbstractCegarLoop]: Abstraction has 2849 states and 3872 transitions. [2021-12-17 21:08:08,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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) [2021-12-17 21:08:08,369 INFO L276 IsEmpty]: Start isEmpty. Operand 2849 states and 3872 transitions. [2021-12-17 21:08:08,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 21:08:08,370 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:08:08,371 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] [2021-12-17 21:08:08,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-17 21:08:08,371 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:08:08,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:08:08,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1186785590, now seen corresponding path program 1 times [2021-12-17 21:08:08,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:08:08,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722760712] [2021-12-17 21:08:08,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:08:08,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:08:08,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:08,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:08:08,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:08,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 21:08:08,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:08,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 21:08:08,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:08,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 21:08:08,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:08,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 21:08:08,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:08,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:08:08,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:08:08,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722760712] [2021-12-17 21:08:08,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722760712] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:08:08,452 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:08:08,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:08:08,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024544361] [2021-12-17 21:08:08,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:08:08,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:08:08,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:08:08,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:08:08,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:08:08,454 INFO L87 Difference]: Start difference. First operand 2849 states and 3872 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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) [2021-12-17 21:08:09,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:08:09,954 INFO L93 Difference]: Finished difference Result 7139 states and 10387 transitions. [2021-12-17 21:08:09,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-17 21:08:09,964 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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 79 [2021-12-17 21:08:09,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:08:09,999 INFO L225 Difference]: With dead ends: 7139 [2021-12-17 21:08:09,999 INFO L226 Difference]: Without dead ends: 5942 [2021-12-17 21:08:10,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-12-17 21:08:10,009 INFO L933 BasicCegarLoop]: 589 mSDtfsCounter, 1681 mSDsluCounter, 819 mSDsCounter, 0 mSdLazyCounter, 1199 mSolverCounterSat, 355 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1709 SdHoareTripleChecker+Valid, 1408 SdHoareTripleChecker+Invalid, 1554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 355 IncrementalHoareTripleChecker+Valid, 1199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-17 21:08:10,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1709 Valid, 1408 Invalid, 1554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [355 Valid, 1199 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-17 21:08:10,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5942 states. [2021-12-17 21:08:10,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5942 to 5173. [2021-12-17 21:08:10,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5173 states, 4331 states have (on average 1.408681597783422) internal successors, (6101), 4395 states have internal predecessors, (6101), 489 states have call successors, (489), 300 states have call predecessors, (489), 351 states have return successors, (696), 487 states have call predecessors, (696), 487 states have call successors, (696) [2021-12-17 21:08:10,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5173 states to 5173 states and 7286 transitions. [2021-12-17 21:08:10,264 INFO L78 Accepts]: Start accepts. Automaton has 5173 states and 7286 transitions. Word has length 79 [2021-12-17 21:08:10,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:08:10,265 INFO L470 AbstractCegarLoop]: Abstraction has 5173 states and 7286 transitions. [2021-12-17 21:08:10,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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) [2021-12-17 21:08:10,265 INFO L276 IsEmpty]: Start isEmpty. Operand 5173 states and 7286 transitions. [2021-12-17 21:08:10,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-17 21:08:10,267 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:08:10,268 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-17 21:08:10,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-17 21:08:10,268 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:08:10,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:08:10,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1233946334, now seen corresponding path program 1 times [2021-12-17 21:08:10,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:08:10,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506505924] [2021-12-17 21:08:10,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:08:10,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:08:10,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:10,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:08:10,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:10,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:08:10,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:10,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:08:10,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:10,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:08:10,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:10,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 21:08:10,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:10,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-17 21:08:10,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:10,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-17 21:08:10,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:10,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 21:08:10,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:10,375 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-17 21:08:10,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:08:10,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506505924] [2021-12-17 21:08:10,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506505924] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:08:10,377 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:08:10,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-17 21:08:10,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781798561] [2021-12-17 21:08:10,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:08:10,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 21:08:10,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:08:10,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 21:08:10,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-17 21:08:10,378 INFO L87 Difference]: Start difference. First operand 5173 states and 7286 transitions. Second operand has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 5 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 21:08:11,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:08:11,052 INFO L93 Difference]: Finished difference Result 6998 states and 9688 transitions. [2021-12-17 21:08:11,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 21:08:11,053 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 5 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 91 [2021-12-17 21:08:11,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:08:11,069 INFO L225 Difference]: With dead ends: 6998 [2021-12-17 21:08:11,070 INFO L226 Difference]: Without dead ends: 5367 [2021-12-17 21:08:11,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-12-17 21:08:11,079 INFO L933 BasicCegarLoop]: 355 mSDtfsCounter, 295 mSDsluCounter, 1404 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 1759 SdHoareTripleChecker+Invalid, 853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 21:08:11,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 1759 Invalid, 853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 769 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 21:08:11,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5367 states. [2021-12-17 21:08:11,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5367 to 5233. [2021-12-17 21:08:11,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5233 states, 4379 states have (on average 1.4028316967344143) internal successors, (6143), 4443 states have internal predecessors, (6143), 489 states have call successors, (489), 300 states have call predecessors, (489), 363 states have return successors, (708), 499 states have call predecessors, (708), 487 states have call successors, (708) [2021-12-17 21:08:11,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5233 states to 5233 states and 7340 transitions. [2021-12-17 21:08:11,332 INFO L78 Accepts]: Start accepts. Automaton has 5233 states and 7340 transitions. Word has length 91 [2021-12-17 21:08:11,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:08:11,333 INFO L470 AbstractCegarLoop]: Abstraction has 5233 states and 7340 transitions. [2021-12-17 21:08:11,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 5 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 21:08:11,333 INFO L276 IsEmpty]: Start isEmpty. Operand 5233 states and 7340 transitions. [2021-12-17 21:08:11,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-17 21:08:11,335 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:08:11,336 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-17 21:08:11,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-17 21:08:11,337 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:08:11,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:08:11,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1677847008, now seen corresponding path program 1 times [2021-12-17 21:08:11,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:08:11,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387135090] [2021-12-17 21:08:11,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:08:11,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:08:11,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:11,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:08:11,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:11,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:08:11,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:11,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:08:11,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:11,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:08:11,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:11,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 21:08:11,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:11,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-17 21:08:11,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:11,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-17 21:08:11,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:11,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 21:08:11,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:11,417 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-17 21:08:11,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:08:11,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387135090] [2021-12-17 21:08:11,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387135090] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:08:11,417 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:08:11,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 21:08:11,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343129234] [2021-12-17 21:08:11,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:08:11,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 21:08:11,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:08:11,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 21:08:11,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:08:11,419 INFO L87 Difference]: Start difference. First operand 5233 states and 7340 transitions. Second operand has 8 states, 8 states have (on average 7.75) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-17 21:08:12,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:08:12,203 INFO L93 Difference]: Finished difference Result 6760 states and 9304 transitions. [2021-12-17 21:08:12,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-17 21:08:12,204 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 91 [2021-12-17 21:08:12,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:08:12,220 INFO L225 Difference]: With dead ends: 6760 [2021-12-17 21:08:12,220 INFO L226 Difference]: Without dead ends: 5307 [2021-12-17 21:08:12,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-12-17 21:08:12,225 INFO L933 BasicCegarLoop]: 394 mSDtfsCounter, 743 mSDsluCounter, 1003 mSDsCounter, 0 mSdLazyCounter, 884 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 767 SdHoareTripleChecker+Valid, 1397 SdHoareTripleChecker+Invalid, 1024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 21:08:12,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [767 Valid, 1397 Invalid, 1024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 884 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 21:08:12,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5307 states. [2021-12-17 21:08:12,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5307 to 5012. [2021-12-17 21:08:12,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5012 states, 4211 states have (on average 1.4070292092139633) internal successors, (5925), 4270 states have internal predecessors, (5925), 461 states have call successors, (461), 281 states have call predecessors, (461), 338 states have return successors, (668), 469 states have call predecessors, (668), 459 states have call successors, (668) [2021-12-17 21:08:12,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5012 states to 5012 states and 7054 transitions. [2021-12-17 21:08:12,469 INFO L78 Accepts]: Start accepts. Automaton has 5012 states and 7054 transitions. Word has length 91 [2021-12-17 21:08:12,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:08:12,470 INFO L470 AbstractCegarLoop]: Abstraction has 5012 states and 7054 transitions. [2021-12-17 21:08:12,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-17 21:08:12,470 INFO L276 IsEmpty]: Start isEmpty. Operand 5012 states and 7054 transitions. [2021-12-17 21:08:12,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-17 21:08:12,473 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:08:12,473 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-17 21:08:12,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-17 21:08:12,474 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:08:12,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:08:12,474 INFO L85 PathProgramCache]: Analyzing trace with hash -677958242, now seen corresponding path program 1 times [2021-12-17 21:08:12,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:08:12,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028811708] [2021-12-17 21:08:12,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:08:12,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:08:12,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:12,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:08:12,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:12,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:08:12,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:12,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:08:12,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:12,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:08:12,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:12,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 21:08:12,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:12,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-17 21:08:12,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:12,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-17 21:08:12,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:12,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 21:08:12,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:12,527 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 21:08:12,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:08:12,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028811708] [2021-12-17 21:08:12,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028811708] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:08:12,527 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:08:12,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:08:12,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459721212] [2021-12-17 21:08:12,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:08:12,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:08:12,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:08:12,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:08:12,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:08:12,529 INFO L87 Difference]: Start difference. First operand 5012 states and 7054 transitions. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 4 states have internal predecessors, (70), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-17 21:08:13,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:08:13,062 INFO L93 Difference]: Finished difference Result 8164 states and 11166 transitions. [2021-12-17 21:08:13,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 21:08:13,062 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 4 states have internal predecessors, (70), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 91 [2021-12-17 21:08:13,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:08:13,079 INFO L225 Difference]: With dead ends: 8164 [2021-12-17 21:08:13,080 INFO L226 Difference]: Without dead ends: 6695 [2021-12-17 21:08:13,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-12-17 21:08:13,085 INFO L933 BasicCegarLoop]: 378 mSDtfsCounter, 834 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 859 SdHoareTripleChecker+Valid, 944 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 21:08:13,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [859 Valid, 944 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 21:08:13,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6695 states. [2021-12-17 21:08:13,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6695 to 6481. [2021-12-17 21:08:13,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6481 states, 5360 states have (on average 1.3718283582089552) internal successors, (7353), 5448 states have internal predecessors, (7353), 622 states have call successors, (622), 394 states have call predecessors, (622), 497 states have return successors, (951), 648 states have call predecessors, (951), 620 states have call successors, (951) [2021-12-17 21:08:13,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6481 states to 6481 states and 8926 transitions. [2021-12-17 21:08:13,398 INFO L78 Accepts]: Start accepts. Automaton has 6481 states and 8926 transitions. Word has length 91 [2021-12-17 21:08:13,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:08:13,399 INFO L470 AbstractCegarLoop]: Abstraction has 6481 states and 8926 transitions. [2021-12-17 21:08:13,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 4 states have internal predecessors, (70), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-17 21:08:13,399 INFO L276 IsEmpty]: Start isEmpty. Operand 6481 states and 8926 transitions. [2021-12-17 21:08:13,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-17 21:08:13,401 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:08:13,402 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-17 21:08:13,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-17 21:08:13,402 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:08:13,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:08:13,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1735796320, now seen corresponding path program 1 times [2021-12-17 21:08:13,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:08:13,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190240004] [2021-12-17 21:08:13,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:08:13,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:08:13,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:13,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:08:13,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:13,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:08:13,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:13,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:08:13,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:13,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:08:13,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:13,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 21:08:13,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:13,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-17 21:08:13,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:13,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-17 21:08:13,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:13,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 21:08:13,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:13,444 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-17 21:08:13,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:08:13,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190240004] [2021-12-17 21:08:13,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190240004] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:08:13,444 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:08:13,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 21:08:13,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394124240] [2021-12-17 21:08:13,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:08:13,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 21:08:13,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:08:13,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 21:08:13,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 21:08:13,446 INFO L87 Difference]: Start difference. First operand 6481 states and 8926 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-17 21:08:13,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:08:13,983 INFO L93 Difference]: Finished difference Result 8065 states and 10910 transitions. [2021-12-17 21:08:13,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 21:08:13,984 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 91 [2021-12-17 21:08:13,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:08:13,999 INFO L225 Difference]: With dead ends: 8065 [2021-12-17 21:08:13,999 INFO L226 Difference]: Without dead ends: 5127 [2021-12-17 21:08:14,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-17 21:08:14,008 INFO L933 BasicCegarLoop]: 355 mSDtfsCounter, 410 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 965 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 21:08:14,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [425 Valid, 965 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 21:08:14,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5127 states. [2021-12-17 21:08:14,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5127 to 5012. [2021-12-17 21:08:14,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5012 states, 4211 states have (on average 1.3982426976965092) internal successors, (5888), 4270 states have internal predecessors, (5888), 461 states have call successors, (461), 281 states have call predecessors, (461), 338 states have return successors, (668), 469 states have call predecessors, (668), 459 states have call successors, (668) [2021-12-17 21:08:14,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5012 states to 5012 states and 7017 transitions. [2021-12-17 21:08:14,293 INFO L78 Accepts]: Start accepts. Automaton has 5012 states and 7017 transitions. Word has length 91 [2021-12-17 21:08:14,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:08:14,293 INFO L470 AbstractCegarLoop]: Abstraction has 5012 states and 7017 transitions. [2021-12-17 21:08:14,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-17 21:08:14,293 INFO L276 IsEmpty]: Start isEmpty. Operand 5012 states and 7017 transitions. [2021-12-17 21:08:14,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-17 21:08:14,297 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:08:14,297 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-17 21:08:14,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-17 21:08:14,298 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:08:14,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:08:14,298 INFO L85 PathProgramCache]: Analyzing trace with hash -855388424, now seen corresponding path program 1 times [2021-12-17 21:08:14,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:08:14,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042846040] [2021-12-17 21:08:14,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:08:14,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:08:14,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:14,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:08:14,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:14,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:08:14,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:14,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:08:14,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:14,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:08:14,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:14,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 21:08:14,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:14,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-17 21:08:14,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:14,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-17 21:08:14,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:14,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-17 21:08:14,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:14,370 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 21:08:14,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:08:14,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042846040] [2021-12-17 21:08:14,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042846040] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:08:14,370 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:08:14,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-17 21:08:14,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298470379] [2021-12-17 21:08:14,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:08:14,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 21:08:14,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:08:14,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 21:08:14,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-17 21:08:14,372 INFO L87 Difference]: Start difference. First operand 5012 states and 7017 transitions. Second operand has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-17 21:08:15,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:08:15,557 INFO L93 Difference]: Finished difference Result 7430 states and 10100 transitions. [2021-12-17 21:08:15,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-17 21:08:15,558 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 92 [2021-12-17 21:08:15,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:08:15,570 INFO L225 Difference]: With dead ends: 7430 [2021-12-17 21:08:15,570 INFO L226 Difference]: Without dead ends: 5810 [2021-12-17 21:08:15,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=720, Unknown=0, NotChecked=0, Total=930 [2021-12-17 21:08:15,575 INFO L933 BasicCegarLoop]: 434 mSDtfsCounter, 1350 mSDsluCounter, 1006 mSDsCounter, 0 mSdLazyCounter, 1097 mSolverCounterSat, 373 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1384 SdHoareTripleChecker+Valid, 1440 SdHoareTripleChecker+Invalid, 1470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 373 IncrementalHoareTripleChecker+Valid, 1097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 21:08:15,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1384 Valid, 1440 Invalid, 1470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [373 Valid, 1097 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 21:08:15,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5810 states. [2021-12-17 21:08:15,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5810 to 5633. [2021-12-17 21:08:15,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5633 states, 4678 states have (on average 1.3745190252244548) internal successors, (6430), 4745 states have internal predecessors, (6430), 538 states have call successors, (538), 329 states have call predecessors, (538), 415 states have return successors, (799), 567 states have call predecessors, (799), 536 states have call successors, (799) [2021-12-17 21:08:15,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5633 states to 5633 states and 7767 transitions. [2021-12-17 21:08:15,802 INFO L78 Accepts]: Start accepts. Automaton has 5633 states and 7767 transitions. Word has length 92 [2021-12-17 21:08:15,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:08:15,802 INFO L470 AbstractCegarLoop]: Abstraction has 5633 states and 7767 transitions. [2021-12-17 21:08:15,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-17 21:08:15,802 INFO L276 IsEmpty]: Start isEmpty. Operand 5633 states and 7767 transitions. [2021-12-17 21:08:15,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-17 21:08:15,808 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:08:15,808 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:08:15,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-17 21:08:15,808 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:08:15,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:08:15,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1308432902, now seen corresponding path program 1 times [2021-12-17 21:08:15,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:08:15,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968427703] [2021-12-17 21:08:15,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:08:15,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:08:15,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:15,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:08:15,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:15,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 21:08:15,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:15,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 21:08:15,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:15,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 21:08:15,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:15,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 21:08:15,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:15,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-17 21:08:15,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:15,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 21:08:15,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:15,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-17 21:08:15,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:15,891 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-17 21:08:15,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:08:15,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968427703] [2021-12-17 21:08:15,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968427703] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 21:08:15,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582726158] [2021-12-17 21:08:15,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:08:15,892 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 21:08:15,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 21:08:15,894 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) [2021-12-17 21:08:15,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 21:08:15,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:15,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 21:08:15,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:08:16,200 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-17 21:08:16,200 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 21:08:16,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582726158] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:08:16,201 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 21:08:16,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-17 21:08:16,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092287157] [2021-12-17 21:08:16,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:08:16,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 21:08:16,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:08:16,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 21:08:16,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:08:16,202 INFO L87 Difference]: Start difference. First operand 5633 states and 7767 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 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) [2021-12-17 21:08:16,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:08:16,581 INFO L93 Difference]: Finished difference Result 12567 states and 18092 transitions. [2021-12-17 21:08:16,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 21:08:16,582 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 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 128 [2021-12-17 21:08:16,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:08:16,604 INFO L225 Difference]: With dead ends: 12567 [2021-12-17 21:08:16,605 INFO L226 Difference]: Without dead ends: 9046 [2021-12-17 21:08:16,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:08:16,617 INFO L933 BasicCegarLoop]: 375 mSDtfsCounter, 313 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 570 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 [2021-12-17 21:08:16,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [313 Valid, 570 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 21:08:16,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9046 states. [2021-12-17 21:08:16,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9046 to 8988. [2021-12-17 21:08:17,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8988 states, 7567 states have (on average 1.4024051803885291) internal successors, (10612), 7673 states have internal predecessors, (10612), 814 states have call successors, (814), 495 states have call predecessors, (814), 605 states have return successors, (1218), 828 states have call predecessors, (1218), 812 states have call successors, (1218) [2021-12-17 21:08:17,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8988 states to 8988 states and 12644 transitions. [2021-12-17 21:08:17,025 INFO L78 Accepts]: Start accepts. Automaton has 8988 states and 12644 transitions. Word has length 128 [2021-12-17 21:08:17,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:08:17,025 INFO L470 AbstractCegarLoop]: Abstraction has 8988 states and 12644 transitions. [2021-12-17 21:08:17,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 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) [2021-12-17 21:08:17,025 INFO L276 IsEmpty]: Start isEmpty. Operand 8988 states and 12644 transitions. [2021-12-17 21:08:17,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-17 21:08:17,034 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:08:17,034 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:08:17,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 21:08:17,247 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,SelfDestructingSolverStorable20 [2021-12-17 21:08:17,247 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:08:17,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:08:17,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1559953626, now seen corresponding path program 1 times [2021-12-17 21:08:17,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:08:17,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045965865] [2021-12-17 21:08:17,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:08:17,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:08:17,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:17,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:08:17,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:17,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 21:08:17,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:17,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 21:08:17,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:17,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 21:08:17,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:17,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 21:08:17,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:17,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-17 21:08:17,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:17,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 21:08:17,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:17,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-17 21:08:17,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:17,340 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-17 21:08:17,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:08:17,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045965865] [2021-12-17 21:08:17,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045965865] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 21:08:17,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146013445] [2021-12-17 21:08:17,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:08:17,341 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 21:08:17,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 21:08:17,342 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) [2021-12-17 21:08:17,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 21:08:17,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:17,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 21:08:17,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:08:17,578 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-17 21:08:17,579 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 21:08:17,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146013445] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:08:17,579 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 21:08:17,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-17 21:08:17,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212669647] [2021-12-17 21:08:17,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:08:17,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 21:08:17,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:08:17,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 21:08:17,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:08:17,581 INFO L87 Difference]: Start difference. First operand 8988 states and 12644 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-17 21:08:18,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:08:18,158 INFO L93 Difference]: Finished difference Result 22445 states and 32435 transitions. [2021-12-17 21:08:18,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 21:08:18,161 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 128 [2021-12-17 21:08:18,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:08:18,191 INFO L225 Difference]: With dead ends: 22445 [2021-12-17 21:08:18,192 INFO L226 Difference]: Without dead ends: 10247 [2021-12-17 21:08:18,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:08:18,219 INFO L933 BasicCegarLoop]: 558 mSDtfsCounter, 190 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 920 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 [2021-12-17 21:08:18,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 920 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 21:08:18,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10247 states. [2021-12-17 21:08:18,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10247 to 10247. [2021-12-17 21:08:18,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10247 states, 8657 states have (on average 1.4067228832158947) internal successors, (12178), 8771 states have internal predecessors, (12178), 915 states have call successors, (915), 555 states have call predecessors, (915), 673 states have return successors, (1380), 929 states have call predecessors, (1380), 913 states have call successors, (1380) [2021-12-17 21:08:18,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10247 states to 10247 states and 14473 transitions. [2021-12-17 21:08:18,677 INFO L78 Accepts]: Start accepts. Automaton has 10247 states and 14473 transitions. Word has length 128 [2021-12-17 21:08:18,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:08:18,677 INFO L470 AbstractCegarLoop]: Abstraction has 10247 states and 14473 transitions. [2021-12-17 21:08:18,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-17 21:08:18,678 INFO L276 IsEmpty]: Start isEmpty. Operand 10247 states and 14473 transitions. [2021-12-17 21:08:18,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-17 21:08:18,691 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:08:18,691 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:08:18,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 21:08:18,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-17 21:08:18,908 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:08:18,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:08:18,908 INFO L85 PathProgramCache]: Analyzing trace with hash 839593669, now seen corresponding path program 1 times [2021-12-17 21:08:18,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:08:18,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079437590] [2021-12-17 21:08:18,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:08:18,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:08:18,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:18,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:08:18,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:18,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:08:18,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:18,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:08:18,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:18,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:08:18,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:18,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 21:08:18,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:18,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-17 21:08:18,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:18,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-17 21:08:18,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:18,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-17 21:08:18,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:18,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-17 21:08:18,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:18,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-17 21:08:18,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:18,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-17 21:08:18,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:18,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:08:18,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:18,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:08:18,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:18,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-17 21:08:18,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:18,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-17 21:08:19,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:19,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-17 21:08:19,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:19,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2021-12-17 21:08:19,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:19,006 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 23 proven. 9 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-17 21:08:19,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:08:19,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079437590] [2021-12-17 21:08:19,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079437590] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 21:08:19,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267872004] [2021-12-17 21:08:19,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:08:19,006 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 21:08:19,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 21:08:19,024 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 21:08:19,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 21:08:19,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:19,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 21:08:19,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:08:19,444 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-17 21:08:19,444 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 21:08:19,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267872004] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:08:19,445 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 21:08:19,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 11 [2021-12-17 21:08:19,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567394255] [2021-12-17 21:08:19,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:08:19,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 21:08:19,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:08:19,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 21:08:19,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-17 21:08:19,447 INFO L87 Difference]: Start difference. First operand 10247 states and 14473 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-17 21:08:19,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:08:19,974 INFO L93 Difference]: Finished difference Result 14173 states and 19302 transitions. [2021-12-17 21:08:19,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 21:08:19,974 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 163 [2021-12-17 21:08:19,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:08:20,013 INFO L225 Difference]: With dead ends: 14173 [2021-12-17 21:08:20,014 INFO L226 Difference]: Without dead ends: 12159 [2021-12-17 21:08:20,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-17 21:08:20,027 INFO L933 BasicCegarLoop]: 378 mSDtfsCounter, 61 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 723 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 21:08:20,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 723 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 21:08:20,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12159 states. [2021-12-17 21:08:20,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12159 to 12117. [2021-12-17 21:08:20,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12117 states, 10114 states have (on average 1.377496539450267) internal successors, (13932), 10251 states have internal predecessors, (13932), 1122 states have call successors, (1122), 716 states have call predecessors, (1122), 879 states have return successors, (1648), 1158 states have call predecessors, (1648), 1120 states have call successors, (1648) [2021-12-17 21:08:20,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12117 states to 12117 states and 16702 transitions. [2021-12-17 21:08:20,683 INFO L78 Accepts]: Start accepts. Automaton has 12117 states and 16702 transitions. Word has length 163 [2021-12-17 21:08:20,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:08:20,683 INFO L470 AbstractCegarLoop]: Abstraction has 12117 states and 16702 transitions. [2021-12-17 21:08:20,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-17 21:08:20,683 INFO L276 IsEmpty]: Start isEmpty. Operand 12117 states and 16702 transitions. [2021-12-17 21:08:20,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-12-17 21:08:20,695 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:08:20,695 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:08:20,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 21:08:20,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 21:08:20,912 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:08:20,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:08:20,912 INFO L85 PathProgramCache]: Analyzing trace with hash 675100022, now seen corresponding path program 1 times [2021-12-17 21:08:20,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:08:20,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645087436] [2021-12-17 21:08:20,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:08:20,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:08:20,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:20,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:08:20,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:20,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 21:08:20,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:20,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 21:08:20,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:20,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 21:08:20,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:20,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 21:08:20,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:20,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-17 21:08:20,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:20,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 21:08:20,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:21,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-17 21:08:21,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:21,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 21:08:21,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:21,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-12-17 21:08:21,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:21,047 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-12-17 21:08:21,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:08:21,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645087436] [2021-12-17 21:08:21,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645087436] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 21:08:21,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794388639] [2021-12-17 21:08:21,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:08:21,048 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 21:08:21,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 21:08:21,049 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 21:08:21,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 21:08:21,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:21,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 21:08:21,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:08:21,424 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-17 21:08:21,425 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 21:08:21,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794388639] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:08:21,425 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 21:08:21,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-17 21:08:21,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114707930] [2021-12-17 21:08:21,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:08:21,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 21:08:21,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:08:21,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 21:08:21,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:08:21,426 INFO L87 Difference]: Start difference. First operand 12117 states and 16702 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, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-17 21:08:22,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:08:22,114 INFO L93 Difference]: Finished difference Result 28131 states and 40436 transitions. [2021-12-17 21:08:22,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 21:08:22,115 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, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 166 [2021-12-17 21:08:22,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:08:22,172 INFO L225 Difference]: With dead ends: 28131 [2021-12-17 21:08:22,172 INFO L226 Difference]: Without dead ends: 19996 [2021-12-17 21:08:22,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:08:22,199 INFO L933 BasicCegarLoop]: 374 mSDtfsCounter, 267 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 569 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 [2021-12-17 21:08:22,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 569 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 21:08:22,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19996 states. [2021-12-17 21:08:23,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19996 to 19862. [2021-12-17 21:08:23,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19862 states, 16784 states have (on average 1.403181601525262) internal successors, (23551), 17007 states have internal predecessors, (23551), 1751 states have call successors, (1751), 1106 states have call predecessors, (1751), 1325 states have return successors, (2609), 1757 states have call predecessors, (2609), 1749 states have call successors, (2609) [2021-12-17 21:08:23,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19862 states to 19862 states and 27911 transitions. [2021-12-17 21:08:23,148 INFO L78 Accepts]: Start accepts. Automaton has 19862 states and 27911 transitions. Word has length 166 [2021-12-17 21:08:23,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:08:23,148 INFO L470 AbstractCegarLoop]: Abstraction has 19862 states and 27911 transitions. [2021-12-17 21:08:23,148 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, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-17 21:08:23,149 INFO L276 IsEmpty]: Start isEmpty. Operand 19862 states and 27911 transitions. [2021-12-17 21:08:23,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-12-17 21:08:23,168 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:08:23,168 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:08:23,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 21:08:23,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 21:08:23,383 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:08:23,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:08:23,384 INFO L85 PathProgramCache]: Analyzing trace with hash -37312834, now seen corresponding path program 1 times [2021-12-17 21:08:23,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:08:23,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901656307] [2021-12-17 21:08:23,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:08:23,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:08:23,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:23,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:08:23,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:23,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 21:08:23,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:23,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 21:08:23,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:23,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 21:08:23,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:23,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 21:08:23,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:23,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-17 21:08:23,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:23,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 21:08:23,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:23,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-17 21:08:23,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:23,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 21:08:23,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:23,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-12-17 21:08:23,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:23,482 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-12-17 21:08:23,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:08:23,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901656307] [2021-12-17 21:08:23,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901656307] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 21:08:23,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604139331] [2021-12-17 21:08:23,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:08:23,483 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 21:08:23,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 21:08:23,484 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 21:08:23,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 21:08:23,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:23,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 21:08:23,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:08:23,832 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-17 21:08:23,832 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 21:08:23,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604139331] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:08:23,832 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 21:08:23,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-17 21:08:23,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194662889] [2021-12-17 21:08:23,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:08:23,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 21:08:23,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:08:23,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 21:08:23,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:08:23,833 INFO L87 Difference]: Start difference. First operand 19862 states and 27911 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, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-17 21:08:24,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:08:24,881 INFO L93 Difference]: Finished difference Result 37120 states and 53445 transitions. [2021-12-17 21:08:24,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 21:08:24,882 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, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 166 [2021-12-17 21:08:24,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:08:24,965 INFO L225 Difference]: With dead ends: 37120 [2021-12-17 21:08:24,965 INFO L226 Difference]: Without dead ends: 27166 [2021-12-17 21:08:25,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:08:25,001 INFO L933 BasicCegarLoop]: 383 mSDtfsCounter, 268 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 578 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 [2021-12-17 21:08:25,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 578 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 21:08:25,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27166 states. [2021-12-17 21:08:26,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27166 to 26972. [2021-12-17 21:08:26,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26972 states, 22938 states have (on average 1.4149882291394194) internal successors, (32457), 23229 states have internal predecessors, (32457), 2309 states have call successors, (2309), 1456 states have call predecessors, (2309), 1723 states have return successors, (3409), 2295 states have call predecessors, (3409), 2307 states have call successors, (3409) [2021-12-17 21:08:26,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26972 states to 26972 states and 38175 transitions. [2021-12-17 21:08:26,443 INFO L78 Accepts]: Start accepts. Automaton has 26972 states and 38175 transitions. Word has length 166 [2021-12-17 21:08:26,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:08:26,443 INFO L470 AbstractCegarLoop]: Abstraction has 26972 states and 38175 transitions. [2021-12-17 21:08:26,443 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, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-17 21:08:26,444 INFO L276 IsEmpty]: Start isEmpty. Operand 26972 states and 38175 transitions. [2021-12-17 21:08:26,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-12-17 21:08:26,474 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:08:26,474 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-17 21:08:26,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-17 21:08:26,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-17 21:08:26,675 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:08:26,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:08:26,675 INFO L85 PathProgramCache]: Analyzing trace with hash -539839329, now seen corresponding path program 1 times [2021-12-17 21:08:26,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:08:26,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807861667] [2021-12-17 21:08:26,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:08:26,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:08:26,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:26,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:08:26,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:26,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 21:08:26,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:26,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 21:08:26,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:26,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 21:08:26,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:26,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 21:08:26,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:26,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-17 21:08:26,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:26,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-17 21:08:26,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:26,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 21:08:26,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:26,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-17 21:08:26,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:26,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 21:08:26,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:26,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2021-12-17 21:08:26,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:26,757 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-12-17 21:08:26,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:08:26,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807861667] [2021-12-17 21:08:26,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807861667] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 21:08:26,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828744213] [2021-12-17 21:08:26,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:08:26,757 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 21:08:26,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 21:08:26,758 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 21:08:26,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 21:08:26,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:26,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 655 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 21:08:26,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:08:27,094 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-17 21:08:27,094 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 21:08:27,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828744213] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:08:27,094 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 21:08:27,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-17 21:08:27,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199860281] [2021-12-17 21:08:27,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:08:27,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 21:08:27,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:08:27,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 21:08:27,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:08:27,096 INFO L87 Difference]: Start difference. First operand 26972 states and 38175 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-17 21:08:28,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:08:28,060 INFO L93 Difference]: Finished difference Result 40541 states and 57801 transitions. [2021-12-17 21:08:28,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 21:08:28,061 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 184 [2021-12-17 21:08:28,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:08:28,113 INFO L225 Difference]: With dead ends: 40541 [2021-12-17 21:08:28,113 INFO L226 Difference]: Without dead ends: 20152 [2021-12-17 21:08:28,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:08:28,144 INFO L933 BasicCegarLoop]: 360 mSDtfsCounter, 289 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 21:08:28,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 404 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 21:08:28,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20152 states. [2021-12-17 21:08:28,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20152 to 19063. [2021-12-17 21:08:28,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19063 states, 16177 states have (on average 1.3573592136984607) internal successors, (21958), 16336 states have internal predecessors, (21958), 1612 states have call successors, (1612), 1089 states have call predecessors, (1612), 1272 states have return successors, (2102), 1642 states have call predecessors, (2102), 1610 states have call successors, (2102) [2021-12-17 21:08:28,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19063 states to 19063 states and 25672 transitions. [2021-12-17 21:08:28,955 INFO L78 Accepts]: Start accepts. Automaton has 19063 states and 25672 transitions. Word has length 184 [2021-12-17 21:08:28,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:08:28,955 INFO L470 AbstractCegarLoop]: Abstraction has 19063 states and 25672 transitions. [2021-12-17 21:08:28,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-17 21:08:28,955 INFO L276 IsEmpty]: Start isEmpty. Operand 19063 states and 25672 transitions. [2021-12-17 21:08:28,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-12-17 21:08:28,969 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:08:28,969 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-17 21:08:28,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-17 21:08:29,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-17 21:08:29,170 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:08:29,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:08:29,170 INFO L85 PathProgramCache]: Analyzing trace with hash -331915747, now seen corresponding path program 1 times [2021-12-17 21:08:29,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:08:29,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192797082] [2021-12-17 21:08:29,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:08:29,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:08:29,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:29,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:08:29,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:29,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 21:08:29,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:29,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 21:08:29,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:29,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 21:08:29,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:29,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 21:08:29,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:29,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-17 21:08:29,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:29,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-17 21:08:29,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:29,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 21:08:29,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:29,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-17 21:08:29,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:29,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 21:08:29,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:29,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2021-12-17 21:08:29,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:29,256 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-12-17 21:08:29,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:08:29,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192797082] [2021-12-17 21:08:29,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192797082] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 21:08:29,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983297799] [2021-12-17 21:08:29,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:08:29,257 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 21:08:29,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 21:08:29,258 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 21:08:29,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-17 21:08:29,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:29,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 652 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 21:08:29,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:08:29,586 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-17 21:08:29,586 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 21:08:29,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983297799] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:08:29,587 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 21:08:29,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-17 21:08:29,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325523098] [2021-12-17 21:08:29,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:08:29,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 21:08:29,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:08:29,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 21:08:29,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:08:29,588 INFO L87 Difference]: Start difference. First operand 19063 states and 25672 transitions. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-17 21:08:30,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:08:30,390 INFO L93 Difference]: Finished difference Result 32600 states and 44857 transitions. [2021-12-17 21:08:30,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 21:08:30,390 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 184 [2021-12-17 21:08:30,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:08:30,442 INFO L225 Difference]: With dead ends: 32600 [2021-12-17 21:08:30,442 INFO L226 Difference]: Without dead ends: 18794 [2021-12-17 21:08:30,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:08:30,469 INFO L933 BasicCegarLoop]: 357 mSDtfsCounter, 305 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 21:08:30,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 399 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 21:08:30,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18794 states. [2021-12-17 21:08:31,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18794 to 15709. [2021-12-17 21:08:31,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15709 states, 13313 states have (on average 1.3142041613460527) internal successors, (17496), 13426 states have internal predecessors, (17496), 1320 states have call successors, (1320), 931 states have call predecessors, (1320), 1074 states have return successors, (1686), 1354 states have call predecessors, (1686), 1318 states have call successors, (1686) [2021-12-17 21:08:31,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15709 states to 15709 states and 20502 transitions. [2021-12-17 21:08:31,331 INFO L78 Accepts]: Start accepts. Automaton has 15709 states and 20502 transitions. Word has length 184 [2021-12-17 21:08:31,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:08:31,331 INFO L470 AbstractCegarLoop]: Abstraction has 15709 states and 20502 transitions. [2021-12-17 21:08:31,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-17 21:08:31,331 INFO L276 IsEmpty]: Start isEmpty. Operand 15709 states and 20502 transitions. [2021-12-17 21:08:31,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-12-17 21:08:31,339 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:08:31,339 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-17 21:08:31,356 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-17 21:08:31,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 21:08:31,540 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:08:31,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:08:31,540 INFO L85 PathProgramCache]: Analyzing trace with hash 790542911, now seen corresponding path program 1 times [2021-12-17 21:08:31,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:08:31,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770476571] [2021-12-17 21:08:31,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:08:31,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:08:31,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:31,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:08:31,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:31,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 21:08:31,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:31,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 21:08:31,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:31,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 21:08:31,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:31,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 21:08:31,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:31,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-17 21:08:31,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:31,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-17 21:08:31,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:31,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 21:08:31,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:31,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-17 21:08:31,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:31,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 21:08:31,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:31,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2021-12-17 21:08:31,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:31,642 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-12-17 21:08:31,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:08:31,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770476571] [2021-12-17 21:08:31,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770476571] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 21:08:31,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722057450] [2021-12-17 21:08:31,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:08:31,643 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 21:08:31,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 21:08:31,644 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 21:08:31,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-17 21:08:31,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:31,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 21:08:31,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:08:31,979 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-17 21:08:31,980 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 21:08:31,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722057450] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:08:31,980 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 21:08:31,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-17 21:08:31,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855969906] [2021-12-17 21:08:31,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:08:31,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 21:08:31,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:08:31,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 21:08:31,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:08:31,981 INFO L87 Difference]: Start difference. First operand 15709 states and 20502 transitions. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-17 21:08:32,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:08:32,999 INFO L93 Difference]: Finished difference Result 28603 states and 37555 transitions. [2021-12-17 21:08:32,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 21:08:32,999 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 184 [2021-12-17 21:08:33,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:08:33,043 INFO L225 Difference]: With dead ends: 28603 [2021-12-17 21:08:33,043 INFO L226 Difference]: Without dead ends: 16877 [2021-12-17 21:08:33,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:08:33,070 INFO L933 BasicCegarLoop]: 385 mSDtfsCounter, 331 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 21:08:33,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 573 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 21:08:33,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16877 states. [2021-12-17 21:08:34,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16877 to 16558. [2021-12-17 21:08:34,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16558 states, 14111 states have (on average 1.290270002126001) internal successors, (18207), 14215 states have internal predecessors, (18207), 1320 states have call successors, (1320), 977 states have call predecessors, (1320), 1125 states have return successors, (1676), 1368 states have call predecessors, (1676), 1318 states have call successors, (1676) [2021-12-17 21:08:34,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16558 states to 16558 states and 21203 transitions. [2021-12-17 21:08:34,095 INFO L78 Accepts]: Start accepts. Automaton has 16558 states and 21203 transitions. Word has length 184 [2021-12-17 21:08:34,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:08:34,096 INFO L470 AbstractCegarLoop]: Abstraction has 16558 states and 21203 transitions. [2021-12-17 21:08:34,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-17 21:08:34,096 INFO L276 IsEmpty]: Start isEmpty. Operand 16558 states and 21203 transitions. [2021-12-17 21:08:34,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-12-17 21:08:34,103 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:08:34,103 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:08:34,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-17 21:08:34,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-17 21:08:34,308 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:08:34,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:08:34,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1892049836, now seen corresponding path program 1 times [2021-12-17 21:08:34,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:08:34,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639095613] [2021-12-17 21:08:34,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:08:34,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:08:34,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:34,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:08:34,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:34,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:08:34,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:34,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:08:34,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:34,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:08:34,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:34,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 21:08:34,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:34,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-17 21:08:34,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:34,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-17 21:08:34,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:34,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-17 21:08:34,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:34,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-17 21:08:34,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:34,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-17 21:08:34,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:34,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-17 21:08:34,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:34,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:08:34,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:34,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:08:34,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:34,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 21:08:34,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:34,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-17 21:08:34,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:34,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-17 21:08:34,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:34,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:08:34,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:34,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:08:34,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:34,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2021-12-17 21:08:34,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:34,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2021-12-17 21:08:34,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:34,400 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 23 proven. 9 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-12-17 21:08:34,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:08:34,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639095613] [2021-12-17 21:08:34,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639095613] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 21:08:34,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167881724] [2021-12-17 21:08:34,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:08:34,401 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 21:08:34,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 21:08:34,410 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 21:08:34,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-17 21:08:34,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:34,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 614 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 21:08:34,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:08:34,741 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-17 21:08:34,741 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 21:08:34,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167881724] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:08:34,741 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 21:08:34,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 11 [2021-12-17 21:08:34,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443429888] [2021-12-17 21:08:34,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:08:34,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 21:08:34,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:08:34,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 21:08:34,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-17 21:08:34,742 INFO L87 Difference]: Start difference. First operand 16558 states and 21203 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-17 21:08:35,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:08:35,547 INFO L93 Difference]: Finished difference Result 24478 states and 30811 transitions. [2021-12-17 21:08:35,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 21:08:35,548 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 195 [2021-12-17 21:08:35,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:08:35,595 INFO L225 Difference]: With dead ends: 24478 [2021-12-17 21:08:35,595 INFO L226 Difference]: Without dead ends: 20518 [2021-12-17 21:08:35,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-17 21:08:35,611 INFO L933 BasicCegarLoop]: 369 mSDtfsCounter, 52 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 711 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 21:08:35,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 711 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 21:08:35,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20518 states. [2021-12-17 21:08:36,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20518 to 20508. [2021-12-17 21:08:36,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20508 states, 17189 states have (on average 1.2745360404910118) internal successors, (21908), 17340 states have internal predecessors, (21908), 1762 states have call successors, (1762), 1299 states have call predecessors, (1762), 1555 states have return successors, (2283), 1871 states have call predecessors, (2283), 1760 states have call successors, (2283) [2021-12-17 21:08:36,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20508 states to 20508 states and 25953 transitions. [2021-12-17 21:08:36,749 INFO L78 Accepts]: Start accepts. Automaton has 20508 states and 25953 transitions. Word has length 195 [2021-12-17 21:08:36,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:08:36,749 INFO L470 AbstractCegarLoop]: Abstraction has 20508 states and 25953 transitions. [2021-12-17 21:08:36,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-17 21:08:36,750 INFO L276 IsEmpty]: Start isEmpty. Operand 20508 states and 25953 transitions. [2021-12-17 21:08:36,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-12-17 21:08:36,758 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:08:36,758 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:08:36,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-17 21:08:36,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-17 21:08:36,959 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:08:36,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:08:36,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1505524182, now seen corresponding path program 1 times [2021-12-17 21:08:36,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:08:36,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077728598] [2021-12-17 21:08:36,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:08:36,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:08:36,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:36,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:08:36,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:36,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:08:36,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:37,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:08:37,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:37,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:08:37,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:37,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 21:08:37,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:37,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-17 21:08:37,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:37,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-17 21:08:37,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:37,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-17 21:08:37,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:37,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-17 21:08:37,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:37,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-17 21:08:37,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:37,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-17 21:08:37,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:37,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:08:37,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:37,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:08:37,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:37,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 21:08:37,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:37,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-17 21:08:37,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:37,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-17 21:08:37,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:37,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:08:37,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:37,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:08:37,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:37,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2021-12-17 21:08:37,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:37,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2021-12-17 21:08:37,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:37,046 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 23 proven. 9 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-12-17 21:08:37,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:08:37,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077728598] [2021-12-17 21:08:37,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077728598] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 21:08:37,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277268281] [2021-12-17 21:08:37,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:08:37,047 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 21:08:37,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 21:08:37,048 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 21:08:37,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-17 21:08:37,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:37,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 611 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 21:08:37,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:08:37,404 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2021-12-17 21:08:37,404 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 21:08:37,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277268281] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:08:37,404 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 21:08:37,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 11 [2021-12-17 21:08:37,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348612777] [2021-12-17 21:08:37,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:08:37,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 21:08:37,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:08:37,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 21:08:37,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-17 21:08:37,405 INFO L87 Difference]: Start difference. First operand 20508 states and 25953 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2021-12-17 21:08:38,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:08:38,231 INFO L93 Difference]: Finished difference Result 27014 states and 34145 transitions. [2021-12-17 21:08:38,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 21:08:38,232 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) Word has length 195 [2021-12-17 21:08:38,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:08:38,262 INFO L225 Difference]: With dead ends: 27014 [2021-12-17 21:08:38,262 INFO L226 Difference]: Without dead ends: 12589 [2021-12-17 21:08:38,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-17 21:08:38,285 INFO L933 BasicCegarLoop]: 344 mSDtfsCounter, 240 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 21:08:38,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 344 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 21:08:38,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12589 states. [2021-12-17 21:08:38,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12589 to 12589. [2021-12-17 21:08:38,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12589 states, 11021 states have (on average 1.3109518192541512) internal successors, (14448), 11075 states have internal predecessors, (14448), 872 states have call successors, (872), 654 states have call predecessors, (872), 695 states have return successors, (1065), 861 states have call predecessors, (1065), 872 states have call successors, (1065) [2021-12-17 21:08:38,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12589 states to 12589 states and 16385 transitions. [2021-12-17 21:08:38,918 INFO L78 Accepts]: Start accepts. Automaton has 12589 states and 16385 transitions. Word has length 195 [2021-12-17 21:08:38,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:08:38,918 INFO L470 AbstractCegarLoop]: Abstraction has 12589 states and 16385 transitions. [2021-12-17 21:08:38,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2021-12-17 21:08:38,918 INFO L276 IsEmpty]: Start isEmpty. Operand 12589 states and 16385 transitions. [2021-12-17 21:08:38,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-12-17 21:08:38,925 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:08:38,926 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-17 21:08:38,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-17 21:08:39,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 21:08:39,142 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:08:39,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:08:39,143 INFO L85 PathProgramCache]: Analyzing trace with hash -761983899, now seen corresponding path program 1 times [2021-12-17 21:08:39,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:08:39,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815365459] [2021-12-17 21:08:39,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:08:39,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:08:39,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:39,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:08:39,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:39,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 21:08:39,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:39,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 21:08:39,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:39,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 21:08:39,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:39,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 21:08:39,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:39,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-17 21:08:39,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:39,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 21:08:39,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:39,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-17 21:08:39,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:39,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-12-17 21:08:39,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:39,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 21:08:39,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:39,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2021-12-17 21:08:39,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:39,233 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-12-17 21:08:39,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:08:39,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815365459] [2021-12-17 21:08:39,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815365459] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 21:08:39,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125845186] [2021-12-17 21:08:39,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:08:39,234 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 21:08:39,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 21:08:39,235 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 21:08:39,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-17 21:08:39,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:39,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 644 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 21:08:39,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:08:39,539 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-17 21:08:39,540 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 21:08:39,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125845186] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:08:39,540 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 21:08:39,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-17 21:08:39,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131887190] [2021-12-17 21:08:39,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:08:39,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 21:08:39,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:08:39,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 21:08:39,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:08:39,541 INFO L87 Difference]: Start difference. First operand 12589 states and 16385 transitions. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-17 21:08:40,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:08:40,608 INFO L93 Difference]: Finished difference Result 35786 states and 47052 transitions. [2021-12-17 21:08:40,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 21:08:40,609 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 185 [2021-12-17 21:08:40,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:08:40,669 INFO L225 Difference]: With dead ends: 35786 [2021-12-17 21:08:40,670 INFO L226 Difference]: Without dead ends: 23211 [2021-12-17 21:08:40,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:08:40,712 INFO L933 BasicCegarLoop]: 400 mSDtfsCounter, 172 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 612 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 21:08:40,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 612 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 21:08:40,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23211 states. [2021-12-17 21:08:41,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23211 to 23209. [2021-12-17 21:08:41,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23209 states, 20251 states have (on average 1.3083798330946619) internal successors, (26496), 20359 states have internal predecessors, (26496), 1655 states have call successors, (1655), 1220 states have call predecessors, (1655), 1302 states have return successors, (2378), 1633 states have call predecessors, (2378), 1655 states have call successors, (2378) [2021-12-17 21:08:41,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23209 states to 23209 states and 30529 transitions. [2021-12-17 21:08:41,906 INFO L78 Accepts]: Start accepts. Automaton has 23209 states and 30529 transitions. Word has length 185 [2021-12-17 21:08:41,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:08:41,906 INFO L470 AbstractCegarLoop]: Abstraction has 23209 states and 30529 transitions. [2021-12-17 21:08:41,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-17 21:08:41,907 INFO L276 IsEmpty]: Start isEmpty. Operand 23209 states and 30529 transitions. [2021-12-17 21:08:41,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-12-17 21:08:41,918 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:08:41,918 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-17 21:08:41,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-17 21:08:42,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-12-17 21:08:42,134 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:08:42,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:08:42,135 INFO L85 PathProgramCache]: Analyzing trace with hash -148145425, now seen corresponding path program 1 times [2021-12-17 21:08:42,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:08:42,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567947552] [2021-12-17 21:08:42,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:08:42,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:08:42,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:42,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:08:42,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:42,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 21:08:42,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:42,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 21:08:42,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:42,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 21:08:42,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:42,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 21:08:42,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:42,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-17 21:08:42,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:42,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-17 21:08:42,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:42,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 21:08:42,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:42,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-12-17 21:08:42,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:42,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 21:08:42,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:42,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2021-12-17 21:08:42,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:42,240 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-12-17 21:08:42,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:08:42,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567947552] [2021-12-17 21:08:42,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567947552] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 21:08:42,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385621542] [2021-12-17 21:08:42,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:08:42,240 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 21:08:42,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 21:08:42,254 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 21:08:42,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-17 21:08:42,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:42,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 650 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 21:08:42,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:08:42,549 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-12-17 21:08:42,549 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 21:08:42,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385621542] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:08:42,549 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 21:08:42,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-17 21:08:42,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432235655] [2021-12-17 21:08:42,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:08:42,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 21:08:42,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:08:42,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 21:08:42,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:08:42,636 INFO L87 Difference]: Start difference. First operand 23209 states and 30529 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-17 21:08:44,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:08:44,637 INFO L93 Difference]: Finished difference Result 68821 states and 91662 transitions. [2021-12-17 21:08:44,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 21:08:44,638 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 185 [2021-12-17 21:08:44,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:08:44,756 INFO L225 Difference]: With dead ends: 68821 [2021-12-17 21:08:44,757 INFO L226 Difference]: Without dead ends: 45630 [2021-12-17 21:08:44,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:08:44,809 INFO L933 BasicCegarLoop]: 269 mSDtfsCounter, 167 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 21:08:44,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 467 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 21:08:44,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45630 states. [2021-12-17 21:08:47,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45630 to 45268. [2021-12-17 21:08:47,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45268 states, 39568 states have (on average 1.3000657096643753) internal successors, (51441), 39784 states have internal predecessors, (51441), 3173 states have call successors, (3173), 2372 states have call predecessors, (3173), 2526 states have return successors, (5818), 3119 states have call predecessors, (5818), 3173 states have call successors, (5818) [2021-12-17 21:08:47,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45268 states to 45268 states and 60432 transitions. [2021-12-17 21:08:47,555 INFO L78 Accepts]: Start accepts. Automaton has 45268 states and 60432 transitions. Word has length 185 [2021-12-17 21:08:47,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:08:47,556 INFO L470 AbstractCegarLoop]: Abstraction has 45268 states and 60432 transitions. [2021-12-17 21:08:47,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-17 21:08:47,556 INFO L276 IsEmpty]: Start isEmpty. Operand 45268 states and 60432 transitions. [2021-12-17 21:08:47,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-12-17 21:08:47,582 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:08:47,582 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-17 21:08:47,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-17 21:08:47,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-12-17 21:08:47,799 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:08:47,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:08:47,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1717371087, now seen corresponding path program 1 times [2021-12-17 21:08:47,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:08:47,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544211884] [2021-12-17 21:08:47,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:08:47,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:08:47,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:47,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:08:47,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:47,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 21:08:47,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:47,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 21:08:47,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:47,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 21:08:47,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:47,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 21:08:47,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:47,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-17 21:08:47,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:47,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-17 21:08:47,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:47,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 21:08:47,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:47,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-12-17 21:08:47,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:47,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 21:08:47,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:47,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2021-12-17 21:08:47,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:47,987 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-12-17 21:08:47,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:08:47,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544211884] [2021-12-17 21:08:47,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544211884] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:08:47,987 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:08:47,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 21:08:47,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054062481] [2021-12-17 21:08:47,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:08:47,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 21:08:47,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:08:47,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 21:08:47,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 21:08:47,989 INFO L87 Difference]: Start difference. First operand 45268 states and 60432 transitions. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-17 21:08:50,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:08:50,343 INFO L93 Difference]: Finished difference Result 89780 states and 119543 transitions. [2021-12-17 21:08:50,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 21:08:50,343 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 185 [2021-12-17 21:08:50,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:08:50,471 INFO L225 Difference]: With dead ends: 89780 [2021-12-17 21:08:50,471 INFO L226 Difference]: Without dead ends: 44528 [2021-12-17 21:08:50,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:08:50,552 INFO L933 BasicCegarLoop]: 210 mSDtfsCounter, 374 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 21:08:50,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [391 Valid, 373 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 21:08:50,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44528 states. [2021-12-17 21:08:53,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44528 to 39190. [2021-12-17 21:08:53,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39190 states, 34339 states have (on average 1.298086723550482) internal successors, (44575), 34824 states have internal predecessors, (44575), 2405 states have call successors, (2405), 1790 states have call predecessors, (2405), 2445 states have return successors, (5041), 2579 states have call predecessors, (5041), 2405 states have call successors, (5041) [2021-12-17 21:08:53,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39190 states to 39190 states and 52021 transitions. [2021-12-17 21:08:53,242 INFO L78 Accepts]: Start accepts. Automaton has 39190 states and 52021 transitions. Word has length 185 [2021-12-17 21:08:53,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:08:53,243 INFO L470 AbstractCegarLoop]: Abstraction has 39190 states and 52021 transitions. [2021-12-17 21:08:53,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-17 21:08:53,243 INFO L276 IsEmpty]: Start isEmpty. Operand 39190 states and 52021 transitions. [2021-12-17 21:08:53,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-12-17 21:08:53,261 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:08:53,261 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-17 21:08:53,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-17 21:08:53,261 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:08:53,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:08:53,262 INFO L85 PathProgramCache]: Analyzing trace with hash 829371681, now seen corresponding path program 1 times [2021-12-17 21:08:53,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:08:53,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609564306] [2021-12-17 21:08:53,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:08:53,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:08:53,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:53,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:08:53,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:53,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 21:08:53,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:53,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 21:08:53,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:53,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 21:08:53,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:53,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 21:08:53,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:53,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-17 21:08:53,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:53,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-17 21:08:53,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:53,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 21:08:53,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:53,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2021-12-17 21:08:53,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:53,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 21:08:53,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:53,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2021-12-17 21:08:53,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:53,340 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-12-17 21:08:53,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:08:53,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609564306] [2021-12-17 21:08:53,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609564306] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 21:08:53,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837491169] [2021-12-17 21:08:53,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:08:53,340 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 21:08:53,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 21:08:53,341 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 21:08:53,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-17 21:08:53,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:53,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 664 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 21:08:53,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:08:53,623 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-12-17 21:08:53,623 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 21:08:53,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837491169] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:08:53,624 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 21:08:53,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-17 21:08:53,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660290504] [2021-12-17 21:08:53,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:08:53,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 21:08:53,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:08:53,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 21:08:53,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:08:53,625 INFO L87 Difference]: Start difference. First operand 39190 states and 52021 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-17 21:08:56,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:08:56,891 INFO L93 Difference]: Finished difference Result 94179 states and 126314 transitions. [2021-12-17 21:08:56,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 21:08:56,892 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 187 [2021-12-17 21:08:56,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:08:57,045 INFO L225 Difference]: With dead ends: 94179 [2021-12-17 21:08:57,045 INFO L226 Difference]: Without dead ends: 55007 [2021-12-17 21:08:57,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:08:57,107 INFO L933 BasicCegarLoop]: 234 mSDtfsCounter, 174 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 21:08:57,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 422 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 21:08:57,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55007 states. [2021-12-17 21:09:00,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55007 to 53726. [2021-12-17 21:09:00,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53726 states, 47014 states have (on average 1.298209044114519) internal successors, (61034), 47683 states have internal predecessors, (61034), 3357 states have call successors, (3357), 2472 states have call predecessors, (3357), 3354 states have return successors, (7819), 3574 states have call predecessors, (7819), 3357 states have call successors, (7819) [2021-12-17 21:09:00,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53726 states to 53726 states and 72210 transitions. [2021-12-17 21:09:00,557 INFO L78 Accepts]: Start accepts. Automaton has 53726 states and 72210 transitions. Word has length 187 [2021-12-17 21:09:00,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:09:00,558 INFO L470 AbstractCegarLoop]: Abstraction has 53726 states and 72210 transitions. [2021-12-17 21:09:00,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-17 21:09:00,558 INFO L276 IsEmpty]: Start isEmpty. Operand 53726 states and 72210 transitions. [2021-12-17 21:09:00,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-12-17 21:09:00,586 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:09:00,586 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-17 21:09:00,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-17 21:09:00,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-12-17 21:09:00,787 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:09:00,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:09:00,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1318101849, now seen corresponding path program 1 times [2021-12-17 21:09:00,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:09:00,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074916438] [2021-12-17 21:09:00,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:09:00,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:09:00,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:00,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:09:00,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:00,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 21:09:00,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:00,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 21:09:00,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:00,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 21:09:00,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:00,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 21:09:00,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:00,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-17 21:09:00,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:00,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-17 21:09:00,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:00,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 21:09:00,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:00,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-12-17 21:09:00,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:00,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 21:09:00,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:00,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-17 21:09:00,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:00,883 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2021-12-17 21:09:00,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:09:00,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074916438] [2021-12-17 21:09:00,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074916438] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 21:09:00,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646089275] [2021-12-17 21:09:00,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:09:00,884 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 21:09:00,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 21:09:00,885 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 21:09:00,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-17 21:09:00,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:00,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 678 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 21:09:00,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:09:01,192 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-17 21:09:01,193 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 21:09:01,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646089275] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:09:01,193 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 21:09:01,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-17 21:09:01,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727726379] [2021-12-17 21:09:01,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:09:01,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 21:09:01,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:09:01,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 21:09:01,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:09:01,194 INFO L87 Difference]: Start difference. First operand 53726 states and 72210 transitions. Second operand has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-17 21:09:04,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:09:04,492 INFO L93 Difference]: Finished difference Result 91377 states and 127521 transitions. [2021-12-17 21:09:04,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 21:09:04,492 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 189 [2021-12-17 21:09:04,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:09:04,631 INFO L225 Difference]: With dead ends: 91377 [2021-12-17 21:09:04,631 INFO L226 Difference]: Without dead ends: 53804 [2021-12-17 21:09:04,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:09:04,700 INFO L933 BasicCegarLoop]: 359 mSDtfsCounter, 156 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 21:09:04,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 553 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 21:09:04,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53804 states. [2021-12-17 21:09:07,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53804 to 53690. [2021-12-17 21:09:07,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53690 states, 46978 states have (on average 1.2770232874962748) internal successors, (59992), 47647 states have internal predecessors, (59992), 3357 states have call successors, (3357), 2472 states have call predecessors, (3357), 3354 states have return successors, (7819), 3574 states have call predecessors, (7819), 3357 states have call successors, (7819) [2021-12-17 21:09:07,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53690 states to 53690 states and 71168 transitions. [2021-12-17 21:09:07,955 INFO L78 Accepts]: Start accepts. Automaton has 53690 states and 71168 transitions. Word has length 189 [2021-12-17 21:09:07,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:09:07,955 INFO L470 AbstractCegarLoop]: Abstraction has 53690 states and 71168 transitions. [2021-12-17 21:09:07,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-17 21:09:07,955 INFO L276 IsEmpty]: Start isEmpty. Operand 53690 states and 71168 transitions. [2021-12-17 21:09:07,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-12-17 21:09:07,983 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:09:07,983 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-17 21:09:08,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-17 21:09:08,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 21:09:08,184 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:09:08,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:09:08,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1732310199, now seen corresponding path program 1 times [2021-12-17 21:09:08,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:09:08,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518426286] [2021-12-17 21:09:08,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:09:08,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:09:08,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:08,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:09:08,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:08,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 21:09:08,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:08,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 21:09:08,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:08,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 21:09:08,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:08,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 21:09:08,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:08,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-17 21:09:08,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:08,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-17 21:09:08,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:08,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 21:09:08,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:08,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-17 21:09:08,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:08,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 21:09:08,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:08,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2021-12-17 21:09:08,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:08,269 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-17 21:09:08,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:09:08,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518426286] [2021-12-17 21:09:08,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518426286] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 21:09:08,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932402800] [2021-12-17 21:09:08,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:09:08,270 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 21:09:08,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 21:09:08,271 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 21:09:08,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-17 21:09:08,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:08,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 682 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-17 21:09:08,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:09:08,662 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-12-17 21:09:08,662 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 21:09:08,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932402800] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:09:08,662 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 21:09:08,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2021-12-17 21:09:08,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877058642] [2021-12-17 21:09:08,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:09:08,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 21:09:08,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:09:08,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 21:09:08,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-17 21:09:08,664 INFO L87 Difference]: Start difference. First operand 53690 states and 71168 transitions. Second operand has 5 states, 5 states have (on average 23.8) internal successors, (119), 4 states have internal predecessors, (119), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8)