./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.08.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.08.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 e8ee20bd48f38d06d172550f7b4afad7a85599a8fd397bba890e4eeccd52db93 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 16:16:45,143 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 16:16:45,144 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 16:16:45,197 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 16:16:45,200 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 16:16:45,203 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 16:16:45,204 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 16:16:45,209 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 16:16:45,210 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 16:16:45,211 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 16:16:45,212 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 16:16:45,213 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 16:16:45,213 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 16:16:45,220 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 16:16:45,221 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 16:16:45,221 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 16:16:45,222 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 16:16:45,222 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 16:16:45,223 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 16:16:45,224 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 16:16:45,225 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 16:16:45,232 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 16:16:45,233 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 16:16:45,234 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 16:16:45,236 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 16:16:45,239 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 16:16:45,239 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 16:16:45,240 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 16:16:45,241 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 16:16:45,241 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 16:16:45,241 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 16:16:45,242 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 16:16:45,243 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 16:16:45,243 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 16:16:45,244 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 16:16:45,245 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 16:16:45,245 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 16:16:45,246 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 16:16:45,246 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 16:16:45,246 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 16:16:45,247 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 16:16:45,247 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 16:16:45,265 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 16:16:45,267 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 16:16:45,268 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 16:16:45,268 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 16:16:45,268 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 16:16:45,269 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 16:16:45,269 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 16:16:45,269 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 16:16:45,269 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 16:16:45,269 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 16:16:45,270 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 16:16:45,270 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 16:16:45,270 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 16:16:45,270 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 16:16:45,271 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 16:16:45,271 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 16:16:45,271 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 16:16:45,271 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 16:16:45,271 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 16:16:45,271 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 16:16:45,271 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 16:16:45,272 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 16:16:45,272 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 16:16:45,272 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 16:16:45,272 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:16:45,272 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 16:16:45,272 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 16:16:45,273 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 16:16:45,273 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 16:16:45,273 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 16:16:45,273 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 16:16:45,273 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 16:16:45,273 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 16:16:45,273 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 16:16:45,274 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e8ee20bd48f38d06d172550f7b4afad7a85599a8fd397bba890e4eeccd52db93 [2021-12-14 16:16:45,485 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 16:16:45,503 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 16:16:45,504 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 16:16:45,505 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 16:16:45,506 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 16:16:45,507 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.08.cil-2.c [2021-12-14 16:16:45,546 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8dd663927/2c8bd74195994611919c5e6cdf4a97e6/FLAG7a33cae29 [2021-12-14 16:16:45,955 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 16:16:45,956 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.08.cil-2.c [2021-12-14 16:16:45,965 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8dd663927/2c8bd74195994611919c5e6cdf4a97e6/FLAG7a33cae29 [2021-12-14 16:16:45,976 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8dd663927/2c8bd74195994611919c5e6cdf4a97e6 [2021-12-14 16:16:45,978 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 16:16:45,979 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 16:16:45,980 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 16:16:45,980 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 16:16:45,992 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 16:16:45,993 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:16:45" (1/1) ... [2021-12-14 16:16:45,993 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@676d4a77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:16:45, skipping insertion in model container [2021-12-14 16:16:45,994 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:16:45" (1/1) ... [2021-12-14 16:16:45,998 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 16:16:46,028 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 16:16:46,158 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.08.cil-2.c[913,926] [2021-12-14 16:16:46,183 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.08.cil-2.c[5977,5990] [2021-12-14 16:16:46,226 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:16:46,232 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 16:16:46,239 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.08.cil-2.c[913,926] [2021-12-14 16:16:46,248 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.08.cil-2.c[5977,5990] [2021-12-14 16:16:46,276 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:16:46,289 INFO L208 MainTranslator]: Completed translation [2021-12-14 16:16:46,290 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:16:46 WrapperNode [2021-12-14 16:16:46,290 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 16:16:46,291 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 16:16:46,291 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 16:16:46,291 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 16:16:46,296 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:16:46" (1/1) ... [2021-12-14 16:16:46,315 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:16:46" (1/1) ... [2021-12-14 16:16:46,356 INFO L137 Inliner]: procedures = 64, calls = 73, calls flagged for inlining = 38, calls inlined = 38, statements flattened = 828 [2021-12-14 16:16:46,362 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 16:16:46,363 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 16:16:46,364 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 16:16:46,364 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 16:16:46,370 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:16:46" (1/1) ... [2021-12-14 16:16:46,370 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:16:46" (1/1) ... [2021-12-14 16:16:46,375 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:16:46" (1/1) ... [2021-12-14 16:16:46,375 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:16:46" (1/1) ... [2021-12-14 16:16:46,390 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:16:46" (1/1) ... [2021-12-14 16:16:46,408 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:16:46" (1/1) ... [2021-12-14 16:16:46,421 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:16:46" (1/1) ... [2021-12-14 16:16:46,424 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 16:16:46,425 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 16:16:46,429 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 16:16:46,429 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 16:16:46,431 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:16:46" (1/1) ... [2021-12-14 16:16:46,436 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:16:46,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:16:46,485 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-14 16:16:46,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-14 16:16:46,513 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 16:16:46,513 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-14 16:16:46,513 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-14 16:16:46,513 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2021-12-14 16:16:46,513 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2021-12-14 16:16:46,513 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-14 16:16:46,513 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-14 16:16:46,514 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-14 16:16:46,514 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-14 16:16:46,514 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-14 16:16:46,514 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-14 16:16:46,514 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-14 16:16:46,514 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-14 16:16:46,514 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-14 16:16:46,514 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-14 16:16:46,515 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 16:16:46,515 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-14 16:16:46,515 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-14 16:16:46,515 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 16:16:46,515 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 16:16:46,516 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-14 16:16:46,516 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-14 16:16:46,516 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2021-12-14 16:16:46,516 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2021-12-14 16:16:46,591 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 16:16:46,592 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 16:16:47,147 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 16:16:47,154 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 16:16:47,154 INFO L301 CfgBuilder]: Removed 15 assume(true) statements. [2021-12-14 16:16:47,156 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:16:47 BoogieIcfgContainer [2021-12-14 16:16:47,156 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 16:16:47,157 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 16:16:47,157 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 16:16:47,159 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 16:16:47,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 04:16:45" (1/3) ... [2021-12-14 16:16:47,160 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c52fc85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:16:47, skipping insertion in model container [2021-12-14 16:16:47,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:16:46" (2/3) ... [2021-12-14 16:16:47,160 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c52fc85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:16:47, skipping insertion in model container [2021-12-14 16:16:47,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:16:47" (3/3) ... [2021-12-14 16:16:47,161 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.08.cil-2.c [2021-12-14 16:16:47,164 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 16:16:47,164 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-14 16:16:47,191 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 16:16:47,195 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-14 16:16:47,195 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-14 16:16:47,212 INFO L276 IsEmpty]: Start isEmpty. Operand has 362 states, 319 states have (on average 1.6363636363636365) internal successors, (522), 326 states have internal predecessors, (522), 30 states have call successors, (30), 10 states have call predecessors, (30), 10 states have return successors, (30), 28 states have call predecessors, (30), 30 states have call successors, (30) [2021-12-14 16:16:47,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-14 16:16:47,217 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:47,217 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:16:47,218 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:47,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:47,221 INFO L85 PathProgramCache]: Analyzing trace with hash 975789426, now seen corresponding path program 1 times [2021-12-14 16:16:47,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:47,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743371633] [2021-12-14 16:16:47,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:47,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:47,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:47,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:16:47,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:47,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-14 16:16:47,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:47,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:16:47,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:47,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743371633] [2021-12-14 16:16:47,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743371633] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:47,354 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:16:47,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 16:16:47,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465896111] [2021-12-14 16:16:47,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:47,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 16:16:47,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:47,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 16:16:47,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 16:16:47,378 INFO L87 Difference]: Start difference. First operand has 362 states, 319 states have (on average 1.6363636363636365) internal successors, (522), 326 states have internal predecessors, (522), 30 states have call successors, (30), 10 states have call predecessors, (30), 10 states have return successors, (30), 28 states have call predecessors, (30), 30 states have call successors, (30) Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-14 16:16:47,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:47,780 INFO L93 Difference]: Finished difference Result 710 states and 1139 transitions. [2021-12-14 16:16:47,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 16:16:47,783 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 44 [2021-12-14 16:16:47,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:47,799 INFO L225 Difference]: With dead ends: 710 [2021-12-14 16:16:47,799 INFO L226 Difference]: Without dead ends: 360 [2021-12-14 16:16:47,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:16:47,809 INFO L933 BasicCegarLoop]: 550 mSDtfsCounter, 307 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 1077 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:47,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [310 Valid, 1077 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 16:16:47,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-12-14 16:16:47,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 351. [2021-12-14 16:16:47,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 311 states have (on average 1.540192926045016) internal successors, (479), 315 states have internal predecessors, (479), 30 states have call successors, (30), 10 states have call predecessors, (30), 8 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-12-14 16:16:47,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 535 transitions. [2021-12-14 16:16:47,863 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 535 transitions. Word has length 44 [2021-12-14 16:16:47,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:47,864 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 535 transitions. [2021-12-14 16:16:47,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-14 16:16:47,864 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 535 transitions. [2021-12-14 16:16:47,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-14 16:16:47,866 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:47,866 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:16:47,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 16:16:47,866 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:47,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:47,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1473810704, now seen corresponding path program 1 times [2021-12-14 16:16:47,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:47,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931284257] [2021-12-14 16:16:47,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:47,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:47,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:47,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:16:47,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:47,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-14 16:16:47,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:47,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:16:47,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:47,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931284257] [2021-12-14 16:16:47,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931284257] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:47,970 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:16:47,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 16:16:47,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194732860] [2021-12-14 16:16:47,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:47,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 16:16:47,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:47,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 16:16:47,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 16:16:47,972 INFO L87 Difference]: Start difference. First operand 351 states and 535 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 16:16:48,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:48,129 INFO L93 Difference]: Finished difference Result 483 states and 720 transitions. [2021-12-14 16:16:48,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 16:16:48,130 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2021-12-14 16:16:48,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:48,133 INFO L225 Difference]: With dead ends: 483 [2021-12-14 16:16:48,133 INFO L226 Difference]: Without dead ends: 421 [2021-12-14 16:16:48,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:16:48,137 INFO L933 BasicCegarLoop]: 548 mSDtfsCounter, 708 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 730 SdHoareTripleChecker+Valid, 882 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:48,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [730 Valid, 882 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 16:16:48,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-12-14 16:16:48,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 415. [2021-12-14 16:16:48,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 368 states have (on average 1.5081521739130435) internal successors, (555), 373 states have internal predecessors, (555), 34 states have call successors, (34), 12 states have call predecessors, (34), 11 states have return successors, (36), 30 states have call predecessors, (36), 30 states have call successors, (36) [2021-12-14 16:16:48,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 625 transitions. [2021-12-14 16:16:48,181 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 625 transitions. Word has length 44 [2021-12-14 16:16:48,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:48,181 INFO L470 AbstractCegarLoop]: Abstraction has 415 states and 625 transitions. [2021-12-14 16:16:48,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 16:16:48,181 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 625 transitions. [2021-12-14 16:16:48,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-14 16:16:48,188 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:48,188 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:16:48,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 16:16:48,189 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:48,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:48,189 INFO L85 PathProgramCache]: Analyzing trace with hash 852707101, now seen corresponding path program 1 times [2021-12-14 16:16:48,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:48,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073152167] [2021-12-14 16:16:48,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:48,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:48,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:48,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:16:48,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:48,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-14 16:16:48,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:48,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:16:48,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:48,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073152167] [2021-12-14 16:16:48,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073152167] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:48,234 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:16:48,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 16:16:48,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939368545] [2021-12-14 16:16:48,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:48,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 16:16:48,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:48,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 16:16:48,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 16:16:48,236 INFO L87 Difference]: Start difference. First operand 415 states and 625 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 16:16:48,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:48,492 INFO L93 Difference]: Finished difference Result 663 states and 965 transitions. [2021-12-14 16:16:48,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 16:16:48,492 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2021-12-14 16:16:48,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:48,495 INFO L225 Difference]: With dead ends: 663 [2021-12-14 16:16:48,495 INFO L226 Difference]: Without dead ends: 539 [2021-12-14 16:16:48,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:16:48,496 INFO L933 BasicCegarLoop]: 581 mSDtfsCounter, 288 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 1183 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:48,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 1183 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 16:16:48,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-12-14 16:16:48,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 482. [2021-12-14 16:16:48,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 429 states have (on average 1.4895104895104896) internal successors, (639), 434 states have internal predecessors, (639), 37 states have call successors, (37), 15 states have call predecessors, (37), 14 states have return successors, (39), 33 states have call predecessors, (39), 33 states have call successors, (39) [2021-12-14 16:16:48,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 715 transitions. [2021-12-14 16:16:48,512 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 715 transitions. Word has length 45 [2021-12-14 16:16:48,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:48,512 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 715 transitions. [2021-12-14 16:16:48,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 16:16:48,512 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 715 transitions. [2021-12-14 16:16:48,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-14 16:16:48,513 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:48,513 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:16:48,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 16:16:48,514 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:48,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:48,514 INFO L85 PathProgramCache]: Analyzing trace with hash -431650360, now seen corresponding path program 1 times [2021-12-14 16:16:48,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:48,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499928097] [2021-12-14 16:16:48,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:48,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:48,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:48,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:16:48,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:48,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-14 16:16:48,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:48,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:16:48,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:48,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499928097] [2021-12-14 16:16:48,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499928097] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:48,551 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:16:48,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 16:16:48,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066933209] [2021-12-14 16:16:48,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:48,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 16:16:48,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:48,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 16:16:48,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 16:16:48,553 INFO L87 Difference]: Start difference. First operand 482 states and 715 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 16:16:48,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:48,671 INFO L93 Difference]: Finished difference Result 890 states and 1274 transitions. [2021-12-14 16:16:48,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 16:16:48,672 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2021-12-14 16:16:48,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:48,675 INFO L225 Difference]: With dead ends: 890 [2021-12-14 16:16:48,675 INFO L226 Difference]: Without dead ends: 699 [2021-12-14 16:16:48,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:16:48,676 INFO L933 BasicCegarLoop]: 556 mSDtfsCounter, 725 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 747 SdHoareTripleChecker+Valid, 904 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:48,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [747 Valid, 904 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 16:16:48,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2021-12-14 16:16:48,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 647. [2021-12-14 16:16:48,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 575 states have (on average 1.4417391304347826) internal successors, (829), 583 states have internal predecessors, (829), 48 states have call successors, (48), 22 states have call predecessors, (48), 22 states have return successors, (56), 42 states have call predecessors, (56), 44 states have call successors, (56) [2021-12-14 16:16:48,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 933 transitions. [2021-12-14 16:16:48,699 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 933 transitions. Word has length 45 [2021-12-14 16:16:48,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:48,699 INFO L470 AbstractCegarLoop]: Abstraction has 647 states and 933 transitions. [2021-12-14 16:16:48,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 16:16:48,699 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 933 transitions. [2021-12-14 16:16:48,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-14 16:16:48,700 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:48,700 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:16:48,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 16:16:48,701 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:48,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:48,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1757585952, now seen corresponding path program 1 times [2021-12-14 16:16:48,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:48,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865002855] [2021-12-14 16:16:48,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:48,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:48,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:48,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:16:48,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:48,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 16:16:48,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:48,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 16:16:48,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:48,745 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-14 16:16:48,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:48,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865002855] [2021-12-14 16:16:48,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865002855] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:48,746 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:16:48,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 16:16:48,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976358771] [2021-12-14 16:16:48,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:48,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 16:16:48,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:48,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 16:16:48,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 16:16:48,748 INFO L87 Difference]: Start difference. First operand 647 states and 933 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-14 16:16:49,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:49,078 INFO L93 Difference]: Finished difference Result 991 states and 1394 transitions. [2021-12-14 16:16:49,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 16:16:49,078 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 62 [2021-12-14 16:16:49,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:49,082 INFO L225 Difference]: With dead ends: 991 [2021-12-14 16:16:49,082 INFO L226 Difference]: Without dead ends: 754 [2021-12-14 16:16:49,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:16:49,085 INFO L933 BasicCegarLoop]: 604 mSDtfsCounter, 272 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 1212 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:49,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 1212 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 16:16:49,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2021-12-14 16:16:49,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 716. [2021-12-14 16:16:49,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 635 states have (on average 1.415748031496063) internal successors, (899), 644 states have internal predecessors, (899), 53 states have call successors, (53), 25 states have call predecessors, (53), 26 states have return successors, (65), 47 states have call predecessors, (65), 49 states have call successors, (65) [2021-12-14 16:16:49,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1017 transitions. [2021-12-14 16:16:49,111 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1017 transitions. Word has length 62 [2021-12-14 16:16:49,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:49,111 INFO L470 AbstractCegarLoop]: Abstraction has 716 states and 1017 transitions. [2021-12-14 16:16:49,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-14 16:16:49,112 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1017 transitions. [2021-12-14 16:16:49,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-14 16:16:49,113 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:49,113 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:16:49,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 16:16:49,113 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:49,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:49,114 INFO L85 PathProgramCache]: Analyzing trace with hash 2041601228, now seen corresponding path program 1 times [2021-12-14 16:16:49,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:49,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552068252] [2021-12-14 16:16:49,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:49,114 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:49,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:49,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:16:49,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:49,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 16:16:49,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:49,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-14 16:16:49,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:49,151 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-14 16:16:49,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:49,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552068252] [2021-12-14 16:16:49,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552068252] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:49,152 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:16:49,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 16:16:49,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038164843] [2021-12-14 16:16:49,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:49,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 16:16:49,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:49,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 16:16:49,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 16:16:49,153 INFO L87 Difference]: Start difference. First operand 716 states and 1017 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-14 16:16:49,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:49,272 INFO L93 Difference]: Finished difference Result 1267 states and 1739 transitions. [2021-12-14 16:16:49,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 16:16:49,273 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2021-12-14 16:16:49,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:49,276 INFO L225 Difference]: With dead ends: 1267 [2021-12-14 16:16:49,276 INFO L226 Difference]: Without dead ends: 889 [2021-12-14 16:16:49,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:16:49,278 INFO L933 BasicCegarLoop]: 551 mSDtfsCounter, 712 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 734 SdHoareTripleChecker+Valid, 901 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:49,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [734 Valid, 901 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 16:16:49,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2021-12-14 16:16:49,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 834. [2021-12-14 16:16:49,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 740 states have (on average 1.385135135135135) internal successors, (1025), 750 states have internal predecessors, (1025), 60 states have call successors, (60), 30 states have call predecessors, (60), 32 states have return successors, (76), 54 states have call predecessors, (76), 56 states have call successors, (76) [2021-12-14 16:16:49,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 1161 transitions. [2021-12-14 16:16:49,315 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 1161 transitions. Word has length 67 [2021-12-14 16:16:49,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:49,315 INFO L470 AbstractCegarLoop]: Abstraction has 834 states and 1161 transitions. [2021-12-14 16:16:49,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-14 16:16:49,316 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 1161 transitions. [2021-12-14 16:16:49,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-14 16:16:49,317 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:49,317 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:16:49,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 16:16:49,318 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:49,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:49,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1554818621, now seen corresponding path program 1 times [2021-12-14 16:16:49,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:49,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347146628] [2021-12-14 16:16:49,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:49,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:49,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:49,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:16:49,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:49,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 16:16:49,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:49,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-14 16:16:49,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:49,387 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 16:16:49,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:49,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347146628] [2021-12-14 16:16:49,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347146628] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:16:49,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396508968] [2021-12-14 16:16:49,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:49,388 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:16:49,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:16:49,404 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:16:49,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 16:16:49,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:49,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-14 16:16:49,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:16:49,636 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:16:49,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:16:49,753 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-14 16:16:49,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396508968] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-14 16:16:49,754 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-14 16:16:49,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 8 [2021-12-14 16:16:49,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118438683] [2021-12-14 16:16:49,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:49,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 16:16:49,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:49,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 16:16:49,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:16:49,756 INFO L87 Difference]: Start difference. First operand 834 states and 1161 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-14 16:16:49,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:49,882 INFO L93 Difference]: Finished difference Result 889 states and 1228 transitions. [2021-12-14 16:16:49,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 16:16:49,883 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 68 [2021-12-14 16:16:49,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:49,886 INFO L225 Difference]: With dead ends: 889 [2021-12-14 16:16:49,886 INFO L226 Difference]: Without dead ends: 886 [2021-12-14 16:16:49,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:16:49,887 INFO L933 BasicCegarLoop]: 560 mSDtfsCounter, 965 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 965 SdHoareTripleChecker+Valid, 627 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:49,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [965 Valid, 627 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 16:16:49,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2021-12-14 16:16:49,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 833. [2021-12-14 16:16:49,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 740 states have (on average 1.3824324324324324) internal successors, (1023), 749 states have internal predecessors, (1023), 59 states have call successors, (59), 30 states have call predecessors, (59), 32 states have return successors, (76), 54 states have call predecessors, (76), 56 states have call successors, (76) [2021-12-14 16:16:49,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 1158 transitions. [2021-12-14 16:16:49,929 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 1158 transitions. Word has length 68 [2021-12-14 16:16:49,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:49,930 INFO L470 AbstractCegarLoop]: Abstraction has 833 states and 1158 transitions. [2021-12-14 16:16:49,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-14 16:16:49,930 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 1158 transitions. [2021-12-14 16:16:49,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-14 16:16:49,931 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:49,931 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:16:49,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-14 16:16:50,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:16:50,148 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:50,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:50,149 INFO L85 PathProgramCache]: Analyzing trace with hash 953609583, now seen corresponding path program 1 times [2021-12-14 16:16:50,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:50,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394890980] [2021-12-14 16:16:50,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:50,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:50,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:50,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:16:50,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:50,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 16:16:50,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:50,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-14 16:16:50,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:50,222 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 16:16:50,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:50,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394890980] [2021-12-14 16:16:50,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394890980] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:16:50,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746430659] [2021-12-14 16:16:50,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:50,223 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:16:50,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:16:50,234 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:16:50,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 16:16:50,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:50,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-14 16:16:50,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:16:50,620 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:16:50,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:16:50,738 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-14 16:16:50,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746430659] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:16:50,738 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:16:50,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 11 [2021-12-14 16:16:50,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055875684] [2021-12-14 16:16:50,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:16:50,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-14 16:16:50,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:50,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-14 16:16:50,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:16:50,740 INFO L87 Difference]: Start difference. First operand 833 states and 1158 transitions. Second operand has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-12-14 16:16:51,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:51,778 INFO L93 Difference]: Finished difference Result 2362 states and 3155 transitions. [2021-12-14 16:16:51,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-14 16:16:51,779 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 69 [2021-12-14 16:16:51,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:51,787 INFO L225 Difference]: With dead ends: 2362 [2021-12-14 16:16:51,787 INFO L226 Difference]: Without dead ends: 1918 [2021-12-14 16:16:51,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=324, Invalid=1482, Unknown=0, NotChecked=0, Total=1806 [2021-12-14 16:16:51,790 INFO L933 BasicCegarLoop]: 665 mSDtfsCounter, 1079 mSDsluCounter, 2724 mSDsCounter, 0 mSdLazyCounter, 1451 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1108 SdHoareTripleChecker+Valid, 3389 SdHoareTripleChecker+Invalid, 1498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:51,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1108 Valid, 3389 Invalid, 1498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1451 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-14 16:16:51,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1918 states. [2021-12-14 16:16:51,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1918 to 1207. [2021-12-14 16:16:51,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1207 states, 1078 states have (on average 1.3413729128014842) internal successors, (1446), 1093 states have internal predecessors, (1446), 78 states have call successors, (78), 43 states have call predecessors, (78), 49 states have return successors, (107), 71 states have call predecessors, (107), 75 states have call successors, (107) [2021-12-14 16:16:51,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1207 states to 1207 states and 1631 transitions. [2021-12-14 16:16:51,845 INFO L78 Accepts]: Start accepts. Automaton has 1207 states and 1631 transitions. Word has length 69 [2021-12-14 16:16:51,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:51,846 INFO L470 AbstractCegarLoop]: Abstraction has 1207 states and 1631 transitions. [2021-12-14 16:16:51,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-12-14 16:16:51,847 INFO L276 IsEmpty]: Start isEmpty. Operand 1207 states and 1631 transitions. [2021-12-14 16:16:51,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-14 16:16:51,852 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:51,852 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:16:51,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-14 16:16:52,071 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,SelfDestructingSolverStorable7 [2021-12-14 16:16:52,072 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:52,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:52,072 INFO L85 PathProgramCache]: Analyzing trace with hash 2034031846, now seen corresponding path program 1 times [2021-12-14 16:16:52,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:52,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805924301] [2021-12-14 16:16:52,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:52,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:52,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:52,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:16:52,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:52,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 16:16:52,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:52,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 16:16:52,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:52,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-14 16:16:52,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:52,157 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-14 16:16:52,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:52,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805924301] [2021-12-14 16:16:52,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805924301] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:16:52,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187598345] [2021-12-14 16:16:52,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:52,158 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:16:52,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:16:52,176 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:16:52,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 16:16:52,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:52,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 16:16:52,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:16:52,419 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-14 16:16:52,419 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 16:16:52,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187598345] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:52,420 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 16:16:52,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-14 16:16:52,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842099684] [2021-12-14 16:16:52,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:52,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:16:52,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:52,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:16:52,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:16:52,421 INFO L87 Difference]: Start difference. First operand 1207 states and 1631 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-14 16:16:52,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:52,475 INFO L93 Difference]: Finished difference Result 1851 states and 2469 transitions. [2021-12-14 16:16:52,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:16:52,476 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 88 [2021-12-14 16:16:52,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:52,479 INFO L225 Difference]: With dead ends: 1851 [2021-12-14 16:16:52,479 INFO L226 Difference]: Without dead ends: 1103 [2021-12-14 16:16:52,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:16:52,481 INFO L933 BasicCegarLoop]: 566 mSDtfsCounter, 496 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:52,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [496 Valid, 640 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:16:52,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1103 states. [2021-12-14 16:16:52,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1103 to 1091. [2021-12-14 16:16:52,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1091 states, 975 states have (on average 1.3425641025641026) internal successors, (1309), 990 states have internal predecessors, (1309), 71 states have call successors, (71), 38 states have call predecessors, (71), 43 states have return successors, (96), 63 states have call predecessors, (96), 68 states have call successors, (96) [2021-12-14 16:16:52,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1091 states to 1091 states and 1476 transitions. [2021-12-14 16:16:52,518 INFO L78 Accepts]: Start accepts. Automaton has 1091 states and 1476 transitions. Word has length 88 [2021-12-14 16:16:52,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:52,518 INFO L470 AbstractCegarLoop]: Abstraction has 1091 states and 1476 transitions. [2021-12-14 16:16:52,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-14 16:16:52,519 INFO L276 IsEmpty]: Start isEmpty. Operand 1091 states and 1476 transitions. [2021-12-14 16:16:52,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-14 16:16:52,520 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:52,521 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:16:52,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-14 16:16:52,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:16:52,738 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:52,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:52,738 INFO L85 PathProgramCache]: Analyzing trace with hash 487728341, now seen corresponding path program 1 times [2021-12-14 16:16:52,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:52,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972246482] [2021-12-14 16:16:52,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:52,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:52,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:52,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:16:52,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:52,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 16:16:52,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:52,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 16:16:52,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:52,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-14 16:16:52,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:52,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-14 16:16:52,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:52,791 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-14 16:16:52,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:52,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972246482] [2021-12-14 16:16:52,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972246482] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:16:52,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448393909] [2021-12-14 16:16:52,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:52,792 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:16:52,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:16:52,793 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:16:52,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 16:16:52,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:52,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 16:16:52,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:16:52,999 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-14 16:16:52,999 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 16:16:52,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448393909] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:52,999 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 16:16:52,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-14 16:16:53,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653318527] [2021-12-14 16:16:53,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:53,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:16:53,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:53,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:16:53,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:16:53,001 INFO L87 Difference]: Start difference. First operand 1091 states and 1476 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-14 16:16:53,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:53,043 INFO L93 Difference]: Finished difference Result 1403 states and 1864 transitions. [2021-12-14 16:16:53,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:16:53,044 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 103 [2021-12-14 16:16:53,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:53,045 INFO L225 Difference]: With dead ends: 1403 [2021-12-14 16:16:53,045 INFO L226 Difference]: Without dead ends: 285 [2021-12-14 16:16:53,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:16:53,047 INFO L933 BasicCegarLoop]: 579 mSDtfsCounter, 61 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 1089 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:53,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 1089 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:16:53,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-12-14 16:16:53,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 285. [2021-12-14 16:16:53,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 254 states have (on average 1.5669291338582678) internal successors, (398), 256 states have internal predecessors, (398), 24 states have call successors, (24), 7 states have call predecessors, (24), 6 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-14 16:16:53,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 444 transitions. [2021-12-14 16:16:53,079 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 444 transitions. Word has length 103 [2021-12-14 16:16:53,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:53,079 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 444 transitions. [2021-12-14 16:16:53,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-14 16:16:53,079 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 444 transitions. [2021-12-14 16:16:53,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-14 16:16:53,080 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:53,081 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:16:53,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-14 16:16:53,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:16:53,299 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:53,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:53,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1195242880, now seen corresponding path program 1 times [2021-12-14 16:16:53,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:53,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382783310] [2021-12-14 16:16:53,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:53,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:53,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:53,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:16:53,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:53,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 16:16:53,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:53,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:16:53,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:53,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-14 16:16:53,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:53,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-14 16:16:53,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:53,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:16:53,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:53,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382783310] [2021-12-14 16:16:53,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382783310] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:53,368 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:16:53,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:16:53,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848750100] [2021-12-14 16:16:53,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:53,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 16:16:53,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:53,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 16:16:53,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:16:53,370 INFO L87 Difference]: Start difference. First operand 285 states and 444 transitions. Second operand has 5 states, 5 states have (on average 24.8) internal successors, (124), 3 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:16:54,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:54,010 INFO L93 Difference]: Finished difference Result 659 states and 1044 transitions. [2021-12-14 16:16:54,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 16:16:54,011 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 3 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2021-12-14 16:16:54,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:54,012 INFO L225 Difference]: With dead ends: 659 [2021-12-14 16:16:54,012 INFO L226 Difference]: Without dead ends: 383 [2021-12-14 16:16:54,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:16:54,014 INFO L933 BasicCegarLoop]: 485 mSDtfsCounter, 742 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 762 SdHoareTripleChecker+Valid, 807 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:54,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [762 Valid, 807 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-14 16:16:54,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-12-14 16:16:54,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 285. [2021-12-14 16:16:54,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 254 states have (on average 1.562992125984252) internal successors, (397), 256 states have internal predecessors, (397), 24 states have call successors, (24), 7 states have call predecessors, (24), 6 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-14 16:16:54,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 443 transitions. [2021-12-14 16:16:54,025 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 443 transitions. Word has length 135 [2021-12-14 16:16:54,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:54,025 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 443 transitions. [2021-12-14 16:16:54,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 3 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:16:54,026 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 443 transitions. [2021-12-14 16:16:54,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-14 16:16:54,027 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:54,027 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:16:54,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-14 16:16:54,027 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:54,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:54,028 INFO L85 PathProgramCache]: Analyzing trace with hash -488646274, now seen corresponding path program 1 times [2021-12-14 16:16:54,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:54,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730554871] [2021-12-14 16:16:54,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:54,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:54,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:54,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:16:54,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:54,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 16:16:54,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:54,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:16:54,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:54,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-14 16:16:54,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:54,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-14 16:16:54,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:54,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:16:54,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:54,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730554871] [2021-12-14 16:16:54,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730554871] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:54,105 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:16:54,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 16:16:54,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415329652] [2021-12-14 16:16:54,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:54,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:16:54,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:54,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:16:54,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:16:54,107 INFO L87 Difference]: Start difference. First operand 285 states and 443 transitions. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 4 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:16:55,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:55,830 INFO L93 Difference]: Finished difference Result 1027 states and 1634 transitions. [2021-12-14 16:16:55,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 16:16:55,830 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 4 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2021-12-14 16:16:55,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:55,833 INFO L225 Difference]: With dead ends: 1027 [2021-12-14 16:16:55,833 INFO L226 Difference]: Without dead ends: 759 [2021-12-14 16:16:55,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:16:55,834 INFO L933 BasicCegarLoop]: 521 mSDtfsCounter, 1109 mSDsluCounter, 783 mSDsCounter, 0 mSdLazyCounter, 1385 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1124 SdHoareTripleChecker+Valid, 1304 SdHoareTripleChecker+Invalid, 1493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:55,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1124 Valid, 1304 Invalid, 1493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1385 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-14 16:16:55,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2021-12-14 16:16:55,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 562. [2021-12-14 16:16:55,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 507 states have (on average 1.5759368836291914) internal successors, (799), 510 states have internal predecessors, (799), 41 states have call successors, (41), 13 states have call predecessors, (41), 13 states have return successors, (42), 39 states have call predecessors, (42), 39 states have call successors, (42) [2021-12-14 16:16:55,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 882 transitions. [2021-12-14 16:16:55,860 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 882 transitions. Word has length 135 [2021-12-14 16:16:55,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:55,860 INFO L470 AbstractCegarLoop]: Abstraction has 562 states and 882 transitions. [2021-12-14 16:16:55,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 4 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:16:55,860 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 882 transitions. [2021-12-14 16:16:55,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-14 16:16:55,862 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:55,862 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:16:55,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-14 16:16:55,862 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:55,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:55,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1850648710, now seen corresponding path program 1 times [2021-12-14 16:16:55,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:55,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359290543] [2021-12-14 16:16:55,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:55,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:55,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:55,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:16:55,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:55,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 16:16:55,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:55,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:16:55,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:55,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-14 16:16:55,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:55,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-14 16:16:55,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:55,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:16:55,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:55,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359290543] [2021-12-14 16:16:55,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359290543] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:55,965 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:16:55,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:16:55,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007151659] [2021-12-14 16:16:55,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:55,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:16:55,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:55,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:16:55,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:16:55,966 INFO L87 Difference]: Start difference. First operand 562 states and 882 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:16:58,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:58,057 INFO L93 Difference]: Finished difference Result 1690 states and 2692 transitions. [2021-12-14 16:16:58,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:16:58,057 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2021-12-14 16:16:58,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:58,061 INFO L225 Difference]: With dead ends: 1690 [2021-12-14 16:16:58,061 INFO L226 Difference]: Without dead ends: 1145 [2021-12-14 16:16:58,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 16:16:58,063 INFO L933 BasicCegarLoop]: 746 mSDtfsCounter, 1120 mSDsluCounter, 1502 mSDsCounter, 0 mSdLazyCounter, 2182 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1135 SdHoareTripleChecker+Valid, 2248 SdHoareTripleChecker+Invalid, 2253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 2182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:58,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1135 Valid, 2248 Invalid, 2253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 2182 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-14 16:16:58,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1145 states. [2021-12-14 16:16:58,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1145 to 820. [2021-12-14 16:16:58,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 741 states have (on average 1.5695006747638327) internal successors, (1163), 745 states have internal predecessors, (1163), 58 states have call successors, (58), 19 states have call predecessors, (58), 20 states have return successors, (61), 57 states have call predecessors, (61), 56 states have call successors, (61) [2021-12-14 16:16:58,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 1282 transitions. [2021-12-14 16:16:58,097 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 1282 transitions. Word has length 135 [2021-12-14 16:16:58,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:58,097 INFO L470 AbstractCegarLoop]: Abstraction has 820 states and 1282 transitions. [2021-12-14 16:16:58,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:16:58,097 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 1282 transitions. [2021-12-14 16:16:58,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-14 16:16:58,098 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:58,098 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:16:58,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-14 16:16:58,099 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:58,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:58,099 INFO L85 PathProgramCache]: Analyzing trace with hash 78283516, now seen corresponding path program 1 times [2021-12-14 16:16:58,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:58,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657004043] [2021-12-14 16:16:58,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:58,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:58,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:58,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:16:58,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:58,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 16:16:58,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:58,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:16:58,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:58,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-14 16:16:58,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:58,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-14 16:16:58,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:58,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:16:58,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:58,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657004043] [2021-12-14 16:16:58,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657004043] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:58,209 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:16:58,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:16:58,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598782781] [2021-12-14 16:16:58,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:58,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:16:58,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:58,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:16:58,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:16:58,210 INFO L87 Difference]: Start difference. First operand 820 states and 1282 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:17:00,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:17:00,105 INFO L93 Difference]: Finished difference Result 2667 states and 4240 transitions. [2021-12-14 16:17:00,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:17:00,105 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2021-12-14 16:17:00,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:17:00,112 INFO L225 Difference]: With dead ends: 2667 [2021-12-14 16:17:00,112 INFO L226 Difference]: Without dead ends: 1864 [2021-12-14 16:17:00,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 16:17:00,114 INFO L933 BasicCegarLoop]: 738 mSDtfsCounter, 1117 mSDsluCounter, 1498 mSDsCounter, 0 mSdLazyCounter, 2188 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1132 SdHoareTripleChecker+Valid, 2236 SdHoareTripleChecker+Invalid, 2262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 2188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-14 16:17:00,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1132 Valid, 2236 Invalid, 2262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 2188 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-14 16:17:00,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1864 states. [2021-12-14 16:17:00,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1864 to 1337. [2021-12-14 16:17:00,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1337 states, 1210 states have (on average 1.5636363636363637) internal successors, (1892), 1216 states have internal predecessors, (1892), 92 states have call successors, (92), 31 states have call predecessors, (92), 34 states have return successors, (103), 93 states have call predecessors, (103), 90 states have call successors, (103) [2021-12-14 16:17:00,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1337 states to 1337 states and 2087 transitions. [2021-12-14 16:17:00,179 INFO L78 Accepts]: Start accepts. Automaton has 1337 states and 2087 transitions. Word has length 135 [2021-12-14 16:17:00,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:17:00,180 INFO L470 AbstractCegarLoop]: Abstraction has 1337 states and 2087 transitions. [2021-12-14 16:17:00,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:17:00,180 INFO L276 IsEmpty]: Start isEmpty. Operand 1337 states and 2087 transitions. [2021-12-14 16:17:00,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-14 16:17:00,181 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:17:00,181 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:17:00,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-14 16:17:00,182 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:17:00,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:17:00,183 INFO L85 PathProgramCache]: Analyzing trace with hash 2080169786, now seen corresponding path program 1 times [2021-12-14 16:17:00,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:17:00,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251719061] [2021-12-14 16:17:00,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:17:00,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:17:00,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:00,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:17:00,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:00,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 16:17:00,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:00,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:17:00,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:00,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-14 16:17:00,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:00,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-14 16:17:00,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:00,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:17:00,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:17:00,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251719061] [2021-12-14 16:17:00,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251719061] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:17:00,285 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:17:00,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:17:00,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013633038] [2021-12-14 16:17:00,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:17:00,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:17:00,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:17:00,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:17:00,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:17:00,287 INFO L87 Difference]: Start difference. First operand 1337 states and 2087 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:17:02,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:17:02,458 INFO L93 Difference]: Finished difference Result 4548 states and 7205 transitions. [2021-12-14 16:17:02,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:17:02,459 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2021-12-14 16:17:02,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:17:02,473 INFO L225 Difference]: With dead ends: 4548 [2021-12-14 16:17:02,473 INFO L226 Difference]: Without dead ends: 3228 [2021-12-14 16:17:02,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 16:17:02,479 INFO L933 BasicCegarLoop]: 734 mSDtfsCounter, 1113 mSDsluCounter, 1498 mSDsCounter, 0 mSdLazyCounter, 2183 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1128 SdHoareTripleChecker+Valid, 2232 SdHoareTripleChecker+Invalid, 2257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 2183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-14 16:17:02,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1128 Valid, 2232 Invalid, 2257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 2183 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-14 16:17:02,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3228 states. [2021-12-14 16:17:02,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3228 to 2372. [2021-12-14 16:17:02,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2372 states, 2149 states have (on average 1.5588645881805492) internal successors, (3350), 2159 states have internal predecessors, (3350), 160 states have call successors, (160), 55 states have call predecessors, (160), 62 states have return successors, (193), 165 states have call predecessors, (193), 158 states have call successors, (193) [2021-12-14 16:17:02,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2372 states to 2372 states and 3703 transitions. [2021-12-14 16:17:02,586 INFO L78 Accepts]: Start accepts. Automaton has 2372 states and 3703 transitions. Word has length 135 [2021-12-14 16:17:02,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:17:02,586 INFO L470 AbstractCegarLoop]: Abstraction has 2372 states and 3703 transitions. [2021-12-14 16:17:02,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:17:02,586 INFO L276 IsEmpty]: Start isEmpty. Operand 2372 states and 3703 transitions. [2021-12-14 16:17:02,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-14 16:17:02,588 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:17:02,588 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:17:02,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-14 16:17:02,589 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:17:02,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:17:02,589 INFO L85 PathProgramCache]: Analyzing trace with hash -487652548, now seen corresponding path program 1 times [2021-12-14 16:17:02,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:17:02,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543526103] [2021-12-14 16:17:02,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:17:02,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:17:02,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:02,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:17:02,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:02,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 16:17:02,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:02,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:17:02,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:02,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-14 16:17:02,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:02,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-14 16:17:02,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:02,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:17:02,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:17:02,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543526103] [2021-12-14 16:17:02,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543526103] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:17:02,688 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:17:02,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:17:02,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99576240] [2021-12-14 16:17:02,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:17:02,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:17:02,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:17:02,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:17:02,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:17:02,689 INFO L87 Difference]: Start difference. First operand 2372 states and 3703 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:17:04,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:17:04,664 INFO L93 Difference]: Finished difference Result 8309 states and 13151 transitions. [2021-12-14 16:17:04,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:17:04,664 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2021-12-14 16:17:04,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:17:04,686 INFO L225 Difference]: With dead ends: 8309 [2021-12-14 16:17:04,686 INFO L226 Difference]: Without dead ends: 5954 [2021-12-14 16:17:04,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 16:17:04,693 INFO L933 BasicCegarLoop]: 730 mSDtfsCounter, 1109 mSDsluCounter, 1498 mSDsCounter, 0 mSdLazyCounter, 2178 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1124 SdHoareTripleChecker+Valid, 2228 SdHoareTripleChecker+Invalid, 2252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 2178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-14 16:17:04,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1124 Valid, 2228 Invalid, 2252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 2178 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-14 16:17:04,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5954 states. [2021-12-14 16:17:04,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5954 to 4447. [2021-12-14 16:17:04,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4447 states, 4032 states have (on average 1.5555555555555556) internal successors, (6272), 4050 states have internal predecessors, (6272), 296 states have call successors, (296), 103 states have call predecessors, (296), 118 states have return successors, (391), 309 states have call predecessors, (391), 294 states have call successors, (391) [2021-12-14 16:17:04,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4447 states to 4447 states and 6959 transitions. [2021-12-14 16:17:04,929 INFO L78 Accepts]: Start accepts. Automaton has 4447 states and 6959 transitions. Word has length 135 [2021-12-14 16:17:04,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:17:04,930 INFO L470 AbstractCegarLoop]: Abstraction has 4447 states and 6959 transitions. [2021-12-14 16:17:04,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:17:04,930 INFO L276 IsEmpty]: Start isEmpty. Operand 4447 states and 6959 transitions. [2021-12-14 16:17:04,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-14 16:17:04,933 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:17:04,933 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:17:04,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-14 16:17:04,933 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:17:04,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:17:04,934 INFO L85 PathProgramCache]: Analyzing trace with hash -16296198, now seen corresponding path program 1 times [2021-12-14 16:17:04,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:17:04,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379800107] [2021-12-14 16:17:04,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:17:04,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:17:04,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:04,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:17:04,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:04,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 16:17:04,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:05,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:17:05,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:05,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-14 16:17:05,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:05,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-14 16:17:05,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:05,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:17:05,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:17:05,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379800107] [2021-12-14 16:17:05,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379800107] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:17:05,027 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:17:05,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:17:05,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519304555] [2021-12-14 16:17:05,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:17:05,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:17:05,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:17:05,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:17:05,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:17:05,028 INFO L87 Difference]: Start difference. First operand 4447 states and 6959 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:17:07,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:17:07,134 INFO L93 Difference]: Finished difference Result 15830 states and 25101 transitions. [2021-12-14 16:17:07,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:17:07,135 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2021-12-14 16:17:07,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:17:07,187 INFO L225 Difference]: With dead ends: 15830 [2021-12-14 16:17:07,188 INFO L226 Difference]: Without dead ends: 11400 [2021-12-14 16:17:07,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 16:17:07,203 INFO L933 BasicCegarLoop]: 726 mSDtfsCounter, 1105 mSDsluCounter, 1498 mSDsCounter, 0 mSdLazyCounter, 2173 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1120 SdHoareTripleChecker+Valid, 2224 SdHoareTripleChecker+Invalid, 2247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 2173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-14 16:17:07,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1120 Valid, 2224 Invalid, 2247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 2173 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-14 16:17:07,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11400 states. [2021-12-14 16:17:07,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11400 to 8610. [2021-12-14 16:17:07,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8610 states, 7811 states have (on average 1.5534502624503905) internal successors, (12134), 7845 states have internal predecessors, (12134), 568 states have call successors, (568), 199 states have call predecessors, (568), 230 states have return successors, (841), 597 states have call predecessors, (841), 566 states have call successors, (841) [2021-12-14 16:17:07,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8610 states to 8610 states and 13543 transitions. [2021-12-14 16:17:07,777 INFO L78 Accepts]: Start accepts. Automaton has 8610 states and 13543 transitions. Word has length 135 [2021-12-14 16:17:07,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:17:07,777 INFO L470 AbstractCegarLoop]: Abstraction has 8610 states and 13543 transitions. [2021-12-14 16:17:07,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:17:07,778 INFO L276 IsEmpty]: Start isEmpty. Operand 8610 states and 13543 transitions. [2021-12-14 16:17:07,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-14 16:17:07,782 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:17:07,782 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:17:07,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-14 16:17:07,782 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:17:07,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:17:07,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1663659140, now seen corresponding path program 1 times [2021-12-14 16:17:07,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:17:07,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847010488] [2021-12-14 16:17:07,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:17:07,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:17:07,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:07,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:17:07,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:07,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 16:17:07,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:07,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:17:07,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:07,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-14 16:17:07,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:07,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-14 16:17:07,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:07,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:17:07,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:17:07,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847010488] [2021-12-14 16:17:07,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847010488] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:17:07,863 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:17:07,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:17:07,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262594139] [2021-12-14 16:17:07,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:17:07,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:17:07,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:17:07,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:17:07,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:17:07,865 INFO L87 Difference]: Start difference. First operand 8610 states and 13543 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:17:09,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:17:09,107 INFO L93 Difference]: Finished difference Result 20146 states and 32198 transitions. [2021-12-14 16:17:09,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:17:09,108 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2021-12-14 16:17:09,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:17:09,137 INFO L225 Difference]: With dead ends: 20146 [2021-12-14 16:17:09,137 INFO L226 Difference]: Without dead ends: 11553 [2021-12-14 16:17:09,155 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 [2021-12-14 16:17:09,155 INFO L933 BasicCegarLoop]: 431 mSDtfsCounter, 976 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 901 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 992 SdHoareTripleChecker+Valid, 994 SdHoareTripleChecker+Invalid, 1007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-14 16:17:09,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [992 Valid, 994 Invalid, 1007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 901 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-14 16:17:09,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11553 states. [2021-12-14 16:17:09,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11553 to 8610. [2021-12-14 16:17:09,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8610 states, 7811 states have (on average 1.549225451286647) internal successors, (12101), 7845 states have internal predecessors, (12101), 568 states have call successors, (568), 199 states have call predecessors, (568), 230 states have return successors, (841), 597 states have call predecessors, (841), 566 states have call successors, (841) [2021-12-14 16:17:09,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8610 states to 8610 states and 13510 transitions. [2021-12-14 16:17:09,556 INFO L78 Accepts]: Start accepts. Automaton has 8610 states and 13510 transitions. Word has length 135 [2021-12-14 16:17:09,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:17:09,556 INFO L470 AbstractCegarLoop]: Abstraction has 8610 states and 13510 transitions. [2021-12-14 16:17:09,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:17:09,556 INFO L276 IsEmpty]: Start isEmpty. Operand 8610 states and 13510 transitions. [2021-12-14 16:17:09,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-14 16:17:09,561 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:17:09,561 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:17:09,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-14 16:17:09,561 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:17:09,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:17:09,562 INFO L85 PathProgramCache]: Analyzing trace with hash 499957434, now seen corresponding path program 1 times [2021-12-14 16:17:09,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:17:09,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515370123] [2021-12-14 16:17:09,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:17:09,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:17:09,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:09,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:17:09,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:09,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 16:17:09,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:09,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:17:09,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:09,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-14 16:17:09,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:09,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-14 16:17:09,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:09,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:17:09,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:17:09,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515370123] [2021-12-14 16:17:09,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515370123] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:17:09,678 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:17:09,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:17:09,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506212173] [2021-12-14 16:17:09,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:17:09,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:17:09,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:17:09,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:17:09,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:17:09,681 INFO L87 Difference]: Start difference. First operand 8610 states and 13510 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:17:12,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:17:12,361 INFO L93 Difference]: Finished difference Result 30804 states and 48897 transitions. [2021-12-14 16:17:12,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:17:12,361 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2021-12-14 16:17:12,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:17:12,421 INFO L225 Difference]: With dead ends: 30804 [2021-12-14 16:17:12,421 INFO L226 Difference]: Without dead ends: 22211 [2021-12-14 16:17:12,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 16:17:12,521 INFO L933 BasicCegarLoop]: 710 mSDtfsCounter, 1095 mSDsluCounter, 1498 mSDsCounter, 0 mSdLazyCounter, 2132 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1110 SdHoareTripleChecker+Valid, 2208 SdHoareTripleChecker+Invalid, 2210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 2132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-14 16:17:12,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1110 Valid, 2208 Invalid, 2210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 2132 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-14 16:17:12,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22211 states. [2021-12-14 16:17:13,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22211 to 17030. [2021-12-14 16:17:13,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17030 states, 15463 states have (on average 1.5478238375476945) internal successors, (23934), 15529 states have internal predecessors, (23934), 1112 states have call successors, (1112), 391 states have call predecessors, (1112), 454 states have return successors, (1903), 1173 states have call predecessors, (1903), 1110 states have call successors, (1903) [2021-12-14 16:17:13,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17030 states to 17030 states and 26949 transitions. [2021-12-14 16:17:13,357 INFO L78 Accepts]: Start accepts. Automaton has 17030 states and 26949 transitions. Word has length 135 [2021-12-14 16:17:13,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:17:13,358 INFO L470 AbstractCegarLoop]: Abstraction has 17030 states and 26949 transitions. [2021-12-14 16:17:13,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:17:13,358 INFO L276 IsEmpty]: Start isEmpty. Operand 17030 states and 26949 transitions. [2021-12-14 16:17:13,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-14 16:17:13,367 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:17:13,367 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:17:13,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-14 16:17:13,367 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:17:13,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:17:13,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1473207944, now seen corresponding path program 1 times [2021-12-14 16:17:13,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:17:13,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752826117] [2021-12-14 16:17:13,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:17:13,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:17:13,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:13,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:17:13,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:13,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 16:17:13,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:13,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:17:13,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:13,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-14 16:17:13,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:13,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-14 16:17:13,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:13,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:17:13,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:17:13,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752826117] [2021-12-14 16:17:13,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752826117] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:17:13,455 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:17:13,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:17:13,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455492135] [2021-12-14 16:17:13,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:17:13,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:17:13,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:17:13,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:17:13,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:17:13,458 INFO L87 Difference]: Start difference. First operand 17030 states and 26949 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:17:18,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:17:18,232 INFO L93 Difference]: Finished difference Result 68632 states and 109270 transitions. [2021-12-14 16:17:18,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 16:17:18,233 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2021-12-14 16:17:18,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:17:18,387 INFO L225 Difference]: With dead ends: 68632 [2021-12-14 16:17:18,387 INFO L226 Difference]: Without dead ends: 51619 [2021-12-14 16:17:18,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-14 16:17:18,432 INFO L933 BasicCegarLoop]: 703 mSDtfsCounter, 1424 mSDsluCounter, 1490 mSDsCounter, 0 mSdLazyCounter, 2117 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1448 SdHoareTripleChecker+Valid, 2193 SdHoareTripleChecker+Invalid, 2200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 2117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-14 16:17:18,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1448 Valid, 2193 Invalid, 2200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 2117 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-14 16:17:18,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51619 states. [2021-12-14 16:17:20,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51619 to 33737. [2021-12-14 16:17:20,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33737 states, 30698 states have (on average 1.5492214476513129) internal successors, (47558), 30828 states have internal predecessors, (47558), 2136 states have call successors, (2136), 775 states have call predecessors, (2136), 902 states have return successors, (4449), 2261 states have call predecessors, (4449), 2134 states have call successors, (4449) [2021-12-14 16:17:20,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33737 states to 33737 states and 54143 transitions. [2021-12-14 16:17:20,689 INFO L78 Accepts]: Start accepts. Automaton has 33737 states and 54143 transitions. Word has length 135 [2021-12-14 16:17:20,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:17:20,690 INFO L470 AbstractCegarLoop]: Abstraction has 33737 states and 54143 transitions. [2021-12-14 16:17:20,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:17:20,690 INFO L276 IsEmpty]: Start isEmpty. Operand 33737 states and 54143 transitions. [2021-12-14 16:17:20,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-14 16:17:20,707 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:17:20,707 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:17:20,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-14 16:17:20,707 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:17:20,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:17:20,708 INFO L85 PathProgramCache]: Analyzing trace with hash 679898874, now seen corresponding path program 1 times [2021-12-14 16:17:20,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:17:20,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504924884] [2021-12-14 16:17:20,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:17:20,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:17:20,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:20,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:17:20,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:20,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 16:17:20,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:20,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:17:20,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:20,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-14 16:17:20,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:20,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-14 16:17:20,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:20,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:17:20,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:17:20,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504924884] [2021-12-14 16:17:20,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504924884] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:17:20,804 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:17:20,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:17:20,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677255202] [2021-12-14 16:17:20,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:17:20,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:17:20,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:17:20,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:17:20,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:17:20,805 INFO L87 Difference]: Start difference. First operand 33737 states and 54143 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:17:28,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:17:28,747 INFO L93 Difference]: Finished difference Result 134429 states and 216878 transitions. [2021-12-14 16:17:28,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 16:17:28,748 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2021-12-14 16:17:28,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:17:29,100 INFO L225 Difference]: With dead ends: 134429 [2021-12-14 16:17:29,100 INFO L226 Difference]: Without dead ends: 100709 [2021-12-14 16:17:29,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-14 16:17:29,194 INFO L933 BasicCegarLoop]: 821 mSDtfsCounter, 1165 mSDsluCounter, 1487 mSDsCounter, 0 mSdLazyCounter, 2477 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1179 SdHoareTripleChecker+Valid, 2308 SdHoareTripleChecker+Invalid, 2557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 2477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-14 16:17:29,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1179 Valid, 2308 Invalid, 2557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 2477 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-14 16:17:29,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100709 states. [2021-12-14 16:17:33,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100709 to 65806. [2021-12-14 16:17:33,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65806 states, 59887 states have (on average 1.545644296758896) internal successors, (92564), 60145 states have internal predecessors, (92564), 4120 states have call successors, (4120), 1543 states have call predecessors, (4120), 1798 states have return successors, (10935), 4373 states have call predecessors, (10935), 4118 states have call successors, (10935) [2021-12-14 16:17:33,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65806 states to 65806 states and 107619 transitions. [2021-12-14 16:17:33,661 INFO L78 Accepts]: Start accepts. Automaton has 65806 states and 107619 transitions. Word has length 135 [2021-12-14 16:17:33,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:17:33,661 INFO L470 AbstractCegarLoop]: Abstraction has 65806 states and 107619 transitions. [2021-12-14 16:17:33,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:17:33,663 INFO L276 IsEmpty]: Start isEmpty. Operand 65806 states and 107619 transitions. [2021-12-14 16:17:33,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-14 16:17:33,692 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:17:33,692 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:17:33,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-14 16:17:33,693 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:17:33,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:17:33,693 INFO L85 PathProgramCache]: Analyzing trace with hash 56617272, now seen corresponding path program 1 times [2021-12-14 16:17:33,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:17:33,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322034125] [2021-12-14 16:17:33,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:17:33,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:17:33,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:33,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:17:33,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:33,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 16:17:33,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:33,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:17:33,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:33,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-14 16:17:33,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:33,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-14 16:17:33,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:33,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:17:33,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:17:33,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322034125] [2021-12-14 16:17:33,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322034125] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:17:33,772 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:17:33,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:17:33,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18334882] [2021-12-14 16:17:33,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:17:33,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:17:33,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:17:33,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:17:33,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:17:33,773 INFO L87 Difference]: Start difference. First operand 65806 states and 107619 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:17:47,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:17:47,326 INFO L93 Difference]: Finished difference Result 259816 states and 427112 transitions. [2021-12-14 16:17:47,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 16:17:47,327 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2021-12-14 16:17:47,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:17:48,088 INFO L225 Difference]: With dead ends: 259816 [2021-12-14 16:17:48,088 INFO L226 Difference]: Without dead ends: 194027 [2021-12-14 16:17:48,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-14 16:17:48,559 INFO L933 BasicCegarLoop]: 693 mSDtfsCounter, 1344 mSDsluCounter, 1490 mSDsCounter, 0 mSdLazyCounter, 2101 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1368 SdHoareTripleChecker+Valid, 2183 SdHoareTripleChecker+Invalid, 2184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 2101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-14 16:17:48,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1368 Valid, 2183 Invalid, 2184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 2101 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-14 16:17:48,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194027 states.