./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.15.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 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_2.cil-1+token_ring.15.cil.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 dc8dc9bdb034e5a733c81076f9e42c36caa1eb5cb68a77287d3420bd964c5f5a --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 02:33:20,098 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 02:33:20,102 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 02:33:20,140 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 02:33:20,140 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 02:33:20,144 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 02:33:20,147 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 02:33:20,152 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 02:33:20,155 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 02:33:20,161 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 02:33:20,161 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 02:33:20,166 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 02:33:20,166 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 02:33:20,169 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 02:33:20,170 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 02:33:20,171 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 02:33:20,172 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 02:33:20,173 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 02:33:20,175 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 02:33:20,179 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 02:33:20,184 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 02:33:20,185 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 02:33:20,186 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 02:33:20,187 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 02:33:20,190 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 02:33:20,193 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 02:33:20,193 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 02:33:20,194 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 02:33:20,199 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 02:33:20,200 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 02:33:20,201 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 02:33:20,201 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 02:33:20,203 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 02:33:20,203 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 02:33:20,205 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 02:33:20,205 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 02:33:20,206 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 02:33:20,206 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 02:33:20,206 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 02:33:20,207 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 02:33:20,208 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 02:33:20,209 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-28 02:33:20,239 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 02:33:20,240 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 02:33:20,241 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 02:33:20,241 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 02:33:20,242 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 02:33:20,242 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 02:33:20,242 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 02:33:20,242 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 02:33:20,243 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 02:33:20,243 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 02:33:20,243 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 02:33:20,243 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 02:33:20,243 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 02:33:20,243 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 02:33:20,243 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 02:33:20,244 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 02:33:20,244 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 02:33:20,244 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 02:33:20,244 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 02:33:20,244 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 02:33:20,244 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 02:33:20,244 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 02:33:20,244 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 02:33:20,244 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 02:33:20,245 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 02:33:20,245 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 02:33:20,245 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 02:33:20,251 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 02:33:20,251 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 02:33:20,251 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 02:33:20,251 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 02:33:20,252 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 02:33:20,252 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 02:33:20,252 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dc8dc9bdb034e5a733c81076f9e42c36caa1eb5cb68a77287d3420bd964c5f5a [2021-12-28 02:33:20,602 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 02:33:20,626 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 02:33:20,629 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 02:33:20,630 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 02:33:20,631 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 02:33:20,632 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.15.cil.c [2021-12-28 02:33:20,689 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/567db3490/df94f30a33e245f7adf10a91823c4e02/FLAGc50c2da6b [2021-12-28 02:33:21,259 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 02:33:21,259 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.15.cil.c [2021-12-28 02:33:21,283 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/567db3490/df94f30a33e245f7adf10a91823c4e02/FLAGc50c2da6b [2021-12-28 02:33:21,594 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/567db3490/df94f30a33e245f7adf10a91823c4e02 [2021-12-28 02:33:21,596 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 02:33:21,599 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 02:33:21,601 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 02:33:21,601 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 02:33:21,606 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 02:33:21,606 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 02:33:21" (1/1) ... [2021-12-28 02:33:21,607 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41662b67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:33:21, skipping insertion in model container [2021-12-28 02:33:21,608 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 02:33:21" (1/1) ... [2021-12-28 02:33:21,614 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 02:33:21,673 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 02:33:21,840 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_2.cil-1+token_ring.15.cil.c[914,927] [2021-12-28 02:33:21,911 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_2.cil-1+token_ring.15.cil.c[7115,7128] [2021-12-28 02:33:22,047 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 02:33:22,056 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 02:33:22,066 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_2.cil-1+token_ring.15.cil.c[914,927] [2021-12-28 02:33:22,096 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_2.cil-1+token_ring.15.cil.c[7115,7128] [2021-12-28 02:33:22,139 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 02:33:22,182 INFO L208 MainTranslator]: Completed translation [2021-12-28 02:33:22,183 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:33:22 WrapperNode [2021-12-28 02:33:22,183 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 02:33:22,184 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 02:33:22,184 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 02:33:22,184 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 02:33:22,190 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:33:22" (1/1) ... [2021-12-28 02:33:22,218 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:33:22" (1/1) ... [2021-12-28 02:33:22,280 INFO L137 Inliner]: procedures = 79, calls = 97, calls flagged for inlining = 47, calls inlined = 47, statements flattened = 1101 [2021-12-28 02:33:22,281 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 02:33:22,282 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 02:33:22,282 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 02:33:22,282 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 02:33:22,290 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:33:22" (1/1) ... [2021-12-28 02:33:22,291 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:33:22" (1/1) ... [2021-12-28 02:33:22,300 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:33:22" (1/1) ... [2021-12-28 02:33:22,301 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:33:22" (1/1) ... [2021-12-28 02:33:22,321 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:33:22" (1/1) ... [2021-12-28 02:33:22,339 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:33:22" (1/1) ... [2021-12-28 02:33:22,342 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:33:22" (1/1) ... [2021-12-28 02:33:22,354 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 02:33:22,355 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 02:33:22,356 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 02:33:22,356 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 02:33:22,356 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:33:22" (1/1) ... [2021-12-28 02:33:22,363 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 02:33:22,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:33:22,388 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) [2021-12-28 02:33:22,395 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 [2021-12-28 02:33:22,422 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 02:33:22,423 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-28 02:33:22,423 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-28 02:33:22,423 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2021-12-28 02:33:22,423 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2021-12-28 02:33:22,423 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-28 02:33:22,423 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-28 02:33:22,423 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-28 02:33:22,424 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-28 02:33:22,424 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2021-12-28 02:33:22,424 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2021-12-28 02:33:22,424 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-28 02:33:22,424 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-28 02:33:22,424 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-28 02:33:22,424 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-28 02:33:22,425 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2021-12-28 02:33:22,425 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2021-12-28 02:33:22,425 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2021-12-28 02:33:22,425 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2021-12-28 02:33:22,425 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2021-12-28 02:33:22,425 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2021-12-28 02:33:22,426 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-28 02:33:22,426 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-28 02:33:22,426 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 02:33:22,426 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-28 02:33:22,426 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-28 02:33:22,426 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2021-12-28 02:33:22,426 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2021-12-28 02:33:22,427 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 02:33:22,427 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 02:33:22,427 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-28 02:33:22,427 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-28 02:33:22,427 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2021-12-28 02:33:22,427 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2021-12-28 02:33:22,552 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 02:33:22,561 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 02:33:23,383 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 02:33:23,397 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 02:33:23,398 INFO L299 CfgBuilder]: Removed 20 assume(true) statements. [2021-12-28 02:33:23,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 02:33:23 BoogieIcfgContainer [2021-12-28 02:33:23,401 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 02:33:23,404 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 02:33:23,404 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 02:33:23,406 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 02:33:23,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 02:33:21" (1/3) ... [2021-12-28 02:33:23,407 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@300e84a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 02:33:23, skipping insertion in model container [2021-12-28 02:33:23,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:33:22" (2/3) ... [2021-12-28 02:33:23,408 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@300e84a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 02:33:23, skipping insertion in model container [2021-12-28 02:33:23,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 02:33:23" (3/3) ... [2021-12-28 02:33:23,409 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.15.cil.c [2021-12-28 02:33:23,413 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 02:33:23,413 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-28 02:33:23,464 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 02:33:23,472 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 [2021-12-28 02:33:23,472 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-28 02:33:23,501 INFO L276 IsEmpty]: Start isEmpty. Operand has 514 states, 453 states have (on average 1.6467991169977925) internal successors, (746), 461 states have internal predecessors, (746), 43 states have call successors, (43), 15 states have call predecessors, (43), 15 states have return successors, (43), 41 states have call predecessors, (43), 43 states have call successors, (43) [2021-12-28 02:33:23,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-28 02:33:23,509 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:23,509 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:33:23,510 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:23,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:23,514 INFO L85 PathProgramCache]: Analyzing trace with hash -338141029, now seen corresponding path program 1 times [2021-12-28 02:33:23,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:23,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250763111] [2021-12-28 02:33:23,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:23,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:23,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:23,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:23,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:23,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:33:23,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:23,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:33:23,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:23,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:23,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:23,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:23,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:23,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:33:23,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:23,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:33:23,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:23,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:33:23,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:23,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250763111] [2021-12-28 02:33:23,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250763111] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:23,865 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:23,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 02:33:23,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867703205] [2021-12-28 02:33:23,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:23,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 02:33:23,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:23,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 02:33:23,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:33:23,900 INFO L87 Difference]: Start difference. First operand has 514 states, 453 states have (on average 1.6467991169977925) internal successors, (746), 461 states have internal predecessors, (746), 43 states have call successors, (43), 15 states have call predecessors, (43), 15 states have return successors, (43), 41 states have call predecessors, (43), 43 states have call successors, (43) Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-28 02:33:25,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:25,046 INFO L93 Difference]: Finished difference Result 1133 states and 1820 transitions. [2021-12-28 02:33:25,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 02:33:25,049 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-28 02:33:25,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:25,067 INFO L225 Difference]: With dead ends: 1133 [2021-12-28 02:33:25,067 INFO L226 Difference]: Without dead ends: 638 [2021-12-28 02:33:25,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-12-28 02:33:25,076 INFO L933 BasicCegarLoop]: 799 mSDtfsCounter, 1267 mSDsluCounter, 1508 mSDsCounter, 0 mSdLazyCounter, 1074 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1272 SdHoareTripleChecker+Valid, 2307 SdHoareTripleChecker+Invalid, 1279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 1074 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:25,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1272 Valid, 2307 Invalid, 1279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 1074 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-28 02:33:25,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-12-28 02:33:25,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 599. [2021-12-28 02:33:25,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 521 states have (on average 1.5335892514395393) internal successors, (799), 528 states have internal predecessors, (799), 54 states have call successors, (54), 22 states have call predecessors, (54), 22 states have return successors, (55), 51 states have call predecessors, (55), 50 states have call successors, (55) [2021-12-28 02:33:25,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 908 transitions. [2021-12-28 02:33:25,168 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 908 transitions. Word has length 65 [2021-12-28 02:33:25,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:25,169 INFO L470 AbstractCegarLoop]: Abstraction has 599 states and 908 transitions. [2021-12-28 02:33:25,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-28 02:33:25,169 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 908 transitions. [2021-12-28 02:33:25,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-28 02:33:25,173 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:25,173 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:33:25,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 02:33:25,173 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:25,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:25,174 INFO L85 PathProgramCache]: Analyzing trace with hash -74903688, now seen corresponding path program 1 times [2021-12-28 02:33:25,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:25,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703089142] [2021-12-28 02:33:25,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:25,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:25,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:25,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:25,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:25,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:33:25,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:25,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:33:25,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:25,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:25,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:25,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:25,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:25,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:33:25,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:25,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:33:25,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:25,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:33:25,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:25,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703089142] [2021-12-28 02:33:25,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703089142] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:25,331 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:25,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-28 02:33:25,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260156795] [2021-12-28 02:33:25,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:25,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 02:33:25,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:25,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 02:33:25,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-28 02:33:25,334 INFO L87 Difference]: Start difference. First operand 599 states and 908 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-28 02:33:26,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:26,627 INFO L93 Difference]: Finished difference Result 813 states and 1202 transitions. [2021-12-28 02:33:26,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-28 02:33:26,628 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2021-12-28 02:33:26,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:26,632 INFO L225 Difference]: With dead ends: 813 [2021-12-28 02:33:26,632 INFO L226 Difference]: Without dead ends: 636 [2021-12-28 02:33:26,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-28 02:33:26,634 INFO L933 BasicCegarLoop]: 764 mSDtfsCounter, 1031 mSDsluCounter, 2269 mSDsCounter, 0 mSdLazyCounter, 1724 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1032 SdHoareTripleChecker+Valid, 3033 SdHoareTripleChecker+Invalid, 1875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 1724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:26,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1032 Valid, 3033 Invalid, 1875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 1724 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-28 02:33:26,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-12-28 02:33:26,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 604. [2021-12-28 02:33:26,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 525 states have (on average 1.5276190476190477) internal successors, (802), 532 states have internal predecessors, (802), 54 states have call successors, (54), 22 states have call predecessors, (54), 23 states have return successors, (56), 52 states have call predecessors, (56), 50 states have call successors, (56) [2021-12-28 02:33:26,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 912 transitions. [2021-12-28 02:33:26,666 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 912 transitions. Word has length 65 [2021-12-28 02:33:26,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:26,667 INFO L470 AbstractCegarLoop]: Abstraction has 604 states and 912 transitions. [2021-12-28 02:33:26,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-28 02:33:26,667 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 912 transitions. [2021-12-28 02:33:26,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-28 02:33:26,669 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:26,669 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:33:26,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 02:33:26,670 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:26,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:26,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1104262986, now seen corresponding path program 1 times [2021-12-28 02:33:26,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:26,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836678472] [2021-12-28 02:33:26,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:26,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:26,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:26,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:26,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:26,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:33:26,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:26,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:33:26,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:26,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:26,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:26,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:26,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:26,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:33:26,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:26,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:33:26,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:26,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:33:26,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:26,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836678472] [2021-12-28 02:33:26,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836678472] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:26,839 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:26,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 02:33:26,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862831817] [2021-12-28 02:33:26,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:26,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 02:33:26,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:26,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 02:33:26,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-28 02:33:26,841 INFO L87 Difference]: Start difference. First operand 604 states and 912 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-28 02:33:28,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:28,634 INFO L93 Difference]: Finished difference Result 1504 states and 2131 transitions. [2021-12-28 02:33:28,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-28 02:33:28,634 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 65 [2021-12-28 02:33:28,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:28,644 INFO L225 Difference]: With dead ends: 1504 [2021-12-28 02:33:28,644 INFO L226 Difference]: Without dead ends: 1310 [2021-12-28 02:33:28,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2021-12-28 02:33:28,652 INFO L933 BasicCegarLoop]: 874 mSDtfsCounter, 3811 mSDsluCounter, 2289 mSDsCounter, 0 mSdLazyCounter, 1710 mSolverCounterSat, 629 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3827 SdHoareTripleChecker+Valid, 3163 SdHoareTripleChecker+Invalid, 2339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 629 IncrementalHoareTripleChecker+Valid, 1710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:28,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3827 Valid, 3163 Invalid, 2339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [629 Valid, 1710 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-28 02:33:28,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1310 states. [2021-12-28 02:33:28,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1310 to 1185. [2021-12-28 02:33:28,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1185 states, 987 states have (on average 1.4346504559270516) internal successors, (1416), 1002 states have internal predecessors, (1416), 111 states have call successors, (111), 75 states have call predecessors, (111), 85 states have return successors, (125), 109 states have call predecessors, (125), 107 states have call successors, (125) [2021-12-28 02:33:28,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1185 states to 1185 states and 1652 transitions. [2021-12-28 02:33:28,754 INFO L78 Accepts]: Start accepts. Automaton has 1185 states and 1652 transitions. Word has length 65 [2021-12-28 02:33:28,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:28,754 INFO L470 AbstractCegarLoop]: Abstraction has 1185 states and 1652 transitions. [2021-12-28 02:33:28,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-28 02:33:28,755 INFO L276 IsEmpty]: Start isEmpty. Operand 1185 states and 1652 transitions. [2021-12-28 02:33:28,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-28 02:33:28,756 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:28,756 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:33:28,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-28 02:33:28,757 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:28,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:28,757 INFO L85 PathProgramCache]: Analyzing trace with hash -52813897, now seen corresponding path program 1 times [2021-12-28 02:33:28,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:28,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606299329] [2021-12-28 02:33:28,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:28,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:28,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:28,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:28,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:28,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:33:28,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:28,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:33:28,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:28,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:28,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:28,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:28,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:28,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:33:28,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:28,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:33:28,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:28,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:33:28,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:28,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606299329] [2021-12-28 02:33:28,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606299329] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:28,876 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:28,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-28 02:33:28,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315663355] [2021-12-28 02:33:28,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:28,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 02:33:28,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:28,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 02:33:28,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-28 02:33:28,878 INFO L87 Difference]: Start difference. First operand 1185 states and 1652 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-28 02:33:29,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:29,996 INFO L93 Difference]: Finished difference Result 2066 states and 2795 transitions. [2021-12-28 02:33:29,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-28 02:33:29,997 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2021-12-28 02:33:29,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:30,003 INFO L225 Difference]: With dead ends: 2066 [2021-12-28 02:33:30,003 INFO L226 Difference]: Without dead ends: 1297 [2021-12-28 02:33:30,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-12-28 02:33:30,006 INFO L933 BasicCegarLoop]: 760 mSDtfsCounter, 1032 mSDsluCounter, 2269 mSDsCounter, 0 mSdLazyCounter, 1705 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1034 SdHoareTripleChecker+Valid, 3029 SdHoareTripleChecker+Invalid, 1859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 1705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:30,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1034 Valid, 3029 Invalid, 1859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 1705 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-28 02:33:30,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1297 states. [2021-12-28 02:33:30,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1297 to 1205. [2021-12-28 02:33:30,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1205 states, 1003 states have (on average 1.4227318045862414) internal successors, (1427), 1018 states have internal predecessors, (1427), 111 states have call successors, (111), 75 states have call predecessors, (111), 89 states have return successors, (129), 113 states have call predecessors, (129), 107 states have call successors, (129) [2021-12-28 02:33:30,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1205 states to 1205 states and 1667 transitions. [2021-12-28 02:33:30,055 INFO L78 Accepts]: Start accepts. Automaton has 1205 states and 1667 transitions. Word has length 65 [2021-12-28 02:33:30,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:30,055 INFO L470 AbstractCegarLoop]: Abstraction has 1205 states and 1667 transitions. [2021-12-28 02:33:30,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-28 02:33:30,056 INFO L276 IsEmpty]: Start isEmpty. Operand 1205 states and 1667 transitions. [2021-12-28 02:33:30,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-28 02:33:30,056 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:30,057 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:33:30,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-28 02:33:30,057 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:30,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:30,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1333389497, now seen corresponding path program 1 times [2021-12-28 02:33:30,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:30,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885493887] [2021-12-28 02:33:30,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:30,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:30,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:30,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:30,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:30,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:33:30,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:30,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:33:30,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:30,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:30,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:30,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:30,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:30,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:33:30,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:30,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:33:30,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:30,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:33:30,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:30,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885493887] [2021-12-28 02:33:30,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885493887] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:30,159 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:30,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 02:33:30,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672064034] [2021-12-28 02:33:30,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:30,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 02:33:30,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:30,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 02:33:30,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:33:30,161 INFO L87 Difference]: Start difference. First operand 1205 states and 1667 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-28 02:33:31,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:31,299 INFO L93 Difference]: Finished difference Result 2773 states and 3614 transitions. [2021-12-28 02:33:31,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-28 02:33:31,300 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-28 02:33:31,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:31,308 INFO L225 Difference]: With dead ends: 2773 [2021-12-28 02:33:31,308 INFO L226 Difference]: Without dead ends: 1985 [2021-12-28 02:33:31,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-12-28 02:33:31,312 INFO L933 BasicCegarLoop]: 771 mSDtfsCounter, 1527 mSDsluCounter, 1840 mSDsCounter, 0 mSdLazyCounter, 1331 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1557 SdHoareTripleChecker+Valid, 2611 SdHoareTripleChecker+Invalid, 1486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 1331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:31,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1557 Valid, 2611 Invalid, 1486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 1331 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-28 02:33:31,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1985 states. [2021-12-28 02:33:31,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1985 to 1653. [2021-12-28 02:33:31,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1653 states, 1356 states have (on average 1.3834808259587021) internal successors, (1876), 1380 states have internal predecessors, (1876), 157 states have call successors, (157), 114 states have call predecessors, (157), 138 states have return successors, (201), 161 states have call predecessors, (201), 153 states have call successors, (201) [2021-12-28 02:33:31,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1653 states to 1653 states and 2234 transitions. [2021-12-28 02:33:31,381 INFO L78 Accepts]: Start accepts. Automaton has 1653 states and 2234 transitions. Word has length 65 [2021-12-28 02:33:31,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:31,381 INFO L470 AbstractCegarLoop]: Abstraction has 1653 states and 2234 transitions. [2021-12-28 02:33:31,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-28 02:33:31,382 INFO L276 IsEmpty]: Start isEmpty. Operand 1653 states and 2234 transitions. [2021-12-28 02:33:31,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-28 02:33:31,383 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:31,383 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:33:31,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-28 02:33:31,383 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:31,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:31,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1199375991, now seen corresponding path program 1 times [2021-12-28 02:33:31,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:31,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548386747] [2021-12-28 02:33:31,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:31,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:31,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:31,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:31,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:31,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:33:31,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:31,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:33:31,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:31,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:31,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:31,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:31,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:31,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:33:31,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:31,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:33:31,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:31,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:33:31,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:31,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548386747] [2021-12-28 02:33:31,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548386747] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:31,487 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:31,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:33:31,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217453659] [2021-12-28 02:33:31,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:31,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:33:31,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:31,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:33:31,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:33:31,490 INFO L87 Difference]: Start difference. First operand 1653 states and 2234 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-28 02:33:32,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:32,003 INFO L93 Difference]: Finished difference Result 4131 states and 5388 transitions. [2021-12-28 02:33:32,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-28 02:33:32,004 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-28 02:33:32,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:32,017 INFO L225 Difference]: With dead ends: 4131 [2021-12-28 02:33:32,017 INFO L226 Difference]: Without dead ends: 2897 [2021-12-28 02:33:32,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-12-28 02:33:32,022 INFO L933 BasicCegarLoop]: 736 mSDtfsCounter, 2246 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 281 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2280 SdHoareTripleChecker+Valid, 1493 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 281 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:32,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2280 Valid, 1493 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [281 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 02:33:32,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2897 states. [2021-12-28 02:33:32,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2897 to 2789. [2021-12-28 02:33:32,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2789 states, 2227 states have (on average 1.3161203412662774) internal successors, (2931), 2273 states have internal predecessors, (2931), 286 states have call successors, (286), 220 states have call predecessors, (286), 274 states have return successors, (415), 300 states have call predecessors, (415), 282 states have call successors, (415) [2021-12-28 02:33:32,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2789 states to 2789 states and 3632 transitions. [2021-12-28 02:33:32,164 INFO L78 Accepts]: Start accepts. Automaton has 2789 states and 3632 transitions. Word has length 65 [2021-12-28 02:33:32,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:32,165 INFO L470 AbstractCegarLoop]: Abstraction has 2789 states and 3632 transitions. [2021-12-28 02:33:32,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-28 02:33:32,165 INFO L276 IsEmpty]: Start isEmpty. Operand 2789 states and 3632 transitions. [2021-12-28 02:33:32,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-28 02:33:32,166 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:32,167 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:33:32,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-28 02:33:32,167 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:32,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:32,167 INFO L85 PathProgramCache]: Analyzing trace with hash -791607456, now seen corresponding path program 1 times [2021-12-28 02:33:32,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:32,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425163377] [2021-12-28 02:33:32,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:32,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:32,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:32,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:32,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:32,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:33:32,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:32,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:33:32,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:32,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:32,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:32,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:32,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:32,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:33:32,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:32,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:33:32,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:32,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:33:32,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:32,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425163377] [2021-12-28 02:33:32,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425163377] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:32,256 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:32,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 02:33:32,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489716443] [2021-12-28 02:33:32,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:32,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 02:33:32,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:32,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 02:33:32,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-28 02:33:32,258 INFO L87 Difference]: Start difference. First operand 2789 states and 3632 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-28 02:33:33,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:33,046 INFO L93 Difference]: Finished difference Result 6241 states and 7964 transitions. [2021-12-28 02:33:33,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 02:33:33,046 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2021-12-28 02:33:33,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:33,066 INFO L225 Difference]: With dead ends: 6241 [2021-12-28 02:33:33,067 INFO L226 Difference]: Without dead ends: 3878 [2021-12-28 02:33:33,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-12-28 02:33:33,076 INFO L933 BasicCegarLoop]: 768 mSDtfsCounter, 868 mSDsluCounter, 1414 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 877 SdHoareTripleChecker+Valid, 2182 SdHoareTripleChecker+Invalid, 755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:33,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [877 Valid, 2182 Invalid, 755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-28 02:33:33,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3878 states. [2021-12-28 02:33:33,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3878 to 3622. [2021-12-28 02:33:33,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3622 states, 2872 states have (on average 1.2959610027855153) internal successors, (3722), 2925 states have internal predecessors, (3722), 378 states have call successors, (378), 300 states have call predecessors, (378), 370 states have return successors, (533), 401 states have call predecessors, (533), 374 states have call successors, (533) [2021-12-28 02:33:33,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3622 states to 3622 states and 4633 transitions. [2021-12-28 02:33:33,249 INFO L78 Accepts]: Start accepts. Automaton has 3622 states and 4633 transitions. Word has length 66 [2021-12-28 02:33:33,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:33,250 INFO L470 AbstractCegarLoop]: Abstraction has 3622 states and 4633 transitions. [2021-12-28 02:33:33,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-28 02:33:33,250 INFO L276 IsEmpty]: Start isEmpty. Operand 3622 states and 4633 transitions. [2021-12-28 02:33:33,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-28 02:33:33,256 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:33,256 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] [2021-12-28 02:33:33,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-28 02:33:33,257 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:33,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:33,257 INFO L85 PathProgramCache]: Analyzing trace with hash -993648705, now seen corresponding path program 1 times [2021-12-28 02:33:33,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:33,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26114655] [2021-12-28 02:33:33,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:33,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:33,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:33,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:33,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:33,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:33:33,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:33,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:33:33,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:33,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:33,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:33,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:33,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:33,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:33:33,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:33,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:33:33,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:33,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:33:33,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:33,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26114655] [2021-12-28 02:33:33,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26114655] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:33,363 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:33,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 02:33:33,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861949809] [2021-12-28 02:33:33,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:33,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 02:33:33,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:33,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 02:33:33,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-28 02:33:33,368 INFO L87 Difference]: Start difference. First operand 3622 states and 4633 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-28 02:33:33,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:33,866 INFO L93 Difference]: Finished difference Result 7633 states and 9607 transitions. [2021-12-28 02:33:33,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 02:33:33,867 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 72 [2021-12-28 02:33:33,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:33,889 INFO L225 Difference]: With dead ends: 7633 [2021-12-28 02:33:33,890 INFO L226 Difference]: Without dead ends: 4433 [2021-12-28 02:33:33,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-12-28 02:33:33,899 INFO L933 BasicCegarLoop]: 783 mSDtfsCounter, 1463 mSDsluCounter, 1124 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1498 SdHoareTripleChecker+Valid, 1907 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:33,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1498 Valid, 1907 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 02:33:33,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4433 states. [2021-12-28 02:33:34,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4433 to 4185. [2021-12-28 02:33:34,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4185 states, 3319 states have (on average 1.2862307924073517) internal successors, (4269), 3378 states have internal predecessors, (4269), 434 states have call successors, (434), 350 states have call predecessors, (434), 430 states have return successors, (610), 461 states have call predecessors, (610), 430 states have call successors, (610) [2021-12-28 02:33:34,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4185 states to 4185 states and 5313 transitions. [2021-12-28 02:33:34,113 INFO L78 Accepts]: Start accepts. Automaton has 4185 states and 5313 transitions. Word has length 72 [2021-12-28 02:33:34,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:34,113 INFO L470 AbstractCegarLoop]: Abstraction has 4185 states and 5313 transitions. [2021-12-28 02:33:34,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-28 02:33:34,114 INFO L276 IsEmpty]: Start isEmpty. Operand 4185 states and 5313 transitions. [2021-12-28 02:33:34,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-28 02:33:34,115 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:34,115 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:33:34,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-28 02:33:34,116 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:34,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:34,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1255358187, now seen corresponding path program 1 times [2021-12-28 02:33:34,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:34,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077907999] [2021-12-28 02:33:34,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:34,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:34,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:34,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:34,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:34,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:33:34,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:34,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:33:34,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:34,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:34,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:34,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:34,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:34,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:33:34,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:34,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:33:34,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:34,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:33:34,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:34,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077907999] [2021-12-28 02:33:34,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077907999] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:34,226 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:34,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:33:34,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089556457] [2021-12-28 02:33:34,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:34,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:33:34,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:34,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:33:34,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:33:34,228 INFO L87 Difference]: Start difference. First operand 4185 states and 5313 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-28 02:33:34,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:34,795 INFO L93 Difference]: Finished difference Result 5254 states and 6597 transitions. [2021-12-28 02:33:34,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-28 02:33:34,795 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 73 [2021-12-28 02:33:34,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:34,817 INFO L225 Difference]: With dead ends: 5254 [2021-12-28 02:33:34,817 INFO L226 Difference]: Without dead ends: 5251 [2021-12-28 02:33:34,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-12-28 02:33:34,822 INFO L933 BasicCegarLoop]: 778 mSDtfsCounter, 2570 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 367 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2580 SdHoareTripleChecker+Valid, 1525 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 367 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:34,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2580 Valid, 1525 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [367 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-28 02:33:34,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5251 states. [2021-12-28 02:33:35,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5251 to 4942. [2021-12-28 02:33:35,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4942 states, 3897 states have (on average 1.2740569668976136) internal successors, (4965), 3963 states have internal predecessors, (4965), 517 states have call successors, (517), 422 states have call predecessors, (517), 526 states have return successors, (738), 561 states have call predecessors, (738), 514 states have call successors, (738) [2021-12-28 02:33:35,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4942 states to 4942 states and 6220 transitions. [2021-12-28 02:33:35,105 INFO L78 Accepts]: Start accepts. Automaton has 4942 states and 6220 transitions. Word has length 73 [2021-12-28 02:33:35,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:35,106 INFO L470 AbstractCegarLoop]: Abstraction has 4942 states and 6220 transitions. [2021-12-28 02:33:35,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-28 02:33:35,107 INFO L276 IsEmpty]: Start isEmpty. Operand 4942 states and 6220 transitions. [2021-12-28 02:33:35,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-28 02:33:35,109 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:35,110 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:33:35,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-28 02:33:35,110 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:35,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:35,111 INFO L85 PathProgramCache]: Analyzing trace with hash -262921527, now seen corresponding path program 1 times [2021-12-28 02:33:35,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:35,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647984700] [2021-12-28 02:33:35,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:35,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:35,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:35,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:35,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:35,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:33:35,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:35,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:33:35,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:35,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:35,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:35,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:35,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:35,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:33:35,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:35,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:33:35,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:35,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:33:35,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:35,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647984700] [2021-12-28 02:33:35,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647984700] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:33:35,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828451016] [2021-12-28 02:33:35,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:35,231 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:33:35,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:33:35,236 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) [2021-12-28 02:33:35,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-28 02:33:35,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:35,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-28 02:33:35,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:33:35,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:33:35,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 02:33:36,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:33:36,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828451016] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 02:33:36,066 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 02:33:36,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 4] total 10 [2021-12-28 02:33:36,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764706562] [2021-12-28 02:33:36,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 02:33:36,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 02:33:36,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:36,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 02:33:36,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-28 02:33:36,068 INFO L87 Difference]: Start difference. First operand 4942 states and 6220 transitions. Second operand has 10 states, 10 states have (on average 12.0) internal successors, (120), 7 states have internal predecessors, (120), 4 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-12-28 02:33:38,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:38,208 INFO L93 Difference]: Finished difference Result 9456 states and 11705 transitions. [2021-12-28 02:33:38,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-28 02:33:38,208 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.0) internal successors, (120), 7 states have internal predecessors, (120), 4 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 74 [2021-12-28 02:33:38,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:38,243 INFO L225 Difference]: With dead ends: 9456 [2021-12-28 02:33:38,243 INFO L226 Difference]: Without dead ends: 9453 [2021-12-28 02:33:38,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 174 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2021-12-28 02:33:38,247 INFO L933 BasicCegarLoop]: 930 mSDtfsCounter, 1975 mSDsluCounter, 2505 mSDsCounter, 0 mSdLazyCounter, 2264 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2042 SdHoareTripleChecker+Valid, 3435 SdHoareTripleChecker+Invalid, 2500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 2264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:38,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2042 Valid, 3435 Invalid, 2500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 2264 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-28 02:33:38,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9453 states. [2021-12-28 02:33:38,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9453 to 8567. [2021-12-28 02:33:38,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8567 states, 6732 states have (on average 1.2565359477124183) internal successors, (8459), 6849 states have internal predecessors, (8459), 895 states have call successors, (895), 754 states have call predecessors, (895), 938 states have return successors, (1295), 968 states have call predecessors, (1295), 892 states have call successors, (1295) [2021-12-28 02:33:38,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8567 states to 8567 states and 10649 transitions. [2021-12-28 02:33:38,693 INFO L78 Accepts]: Start accepts. Automaton has 8567 states and 10649 transitions. Word has length 74 [2021-12-28 02:33:38,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:38,693 INFO L470 AbstractCegarLoop]: Abstraction has 8567 states and 10649 transitions. [2021-12-28 02:33:38,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.0) internal successors, (120), 7 states have internal predecessors, (120), 4 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-12-28 02:33:38,693 INFO L276 IsEmpty]: Start isEmpty. Operand 8567 states and 10649 transitions. [2021-12-28 02:33:38,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-28 02:33:38,696 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:38,697 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:33:38,726 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-28 02:33:38,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-28 02:33:38,912 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:38,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:38,912 INFO L85 PathProgramCache]: Analyzing trace with hash -385890155, now seen corresponding path program 2 times [2021-12-28 02:33:38,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:38,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591112119] [2021-12-28 02:33:38,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:38,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:38,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:38,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:38,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:38,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:33:38,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:38,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:33:38,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:38,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:38,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:38,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:38,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:38,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:33:38,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:38,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:33:38,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:38,982 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:33:38,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:38,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591112119] [2021-12-28 02:33:38,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591112119] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:38,983 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:38,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 02:33:38,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717702961] [2021-12-28 02:33:38,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:38,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 02:33:38,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:38,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 02:33:38,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-28 02:33:38,985 INFO L87 Difference]: Start difference. First operand 8567 states and 10649 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-28 02:33:39,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:39,622 INFO L93 Difference]: Finished difference Result 11597 states and 14396 transitions. [2021-12-28 02:33:39,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 02:33:39,622 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 77 [2021-12-28 02:33:39,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:39,640 INFO L225 Difference]: With dead ends: 11597 [2021-12-28 02:33:39,640 INFO L226 Difference]: Without dead ends: 4799 [2021-12-28 02:33:39,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-28 02:33:39,655 INFO L933 BasicCegarLoop]: 813 mSDtfsCounter, 1396 mSDsluCounter, 1155 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1433 SdHoareTripleChecker+Valid, 1968 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:39,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1433 Valid, 1968 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 02:33:39,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4799 states. [2021-12-28 02:33:39,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4799 to 3730. [2021-12-28 02:33:39,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3730 states, 2963 states have (on average 1.2666216672291597) internal successors, (3753), 3002 states have internal predecessors, (3753), 394 states have call successors, (394), 318 states have call predecessors, (394), 371 states have return successors, (519), 414 states have call predecessors, (519), 391 states have call successors, (519) [2021-12-28 02:33:39,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3730 states to 3730 states and 4666 transitions. [2021-12-28 02:33:39,890 INFO L78 Accepts]: Start accepts. Automaton has 3730 states and 4666 transitions. Word has length 77 [2021-12-28 02:33:39,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:39,891 INFO L470 AbstractCegarLoop]: Abstraction has 3730 states and 4666 transitions. [2021-12-28 02:33:39,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-28 02:33:39,891 INFO L276 IsEmpty]: Start isEmpty. Operand 3730 states and 4666 transitions. [2021-12-28 02:33:39,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-28 02:33:39,893 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:39,893 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:33:39,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-28 02:33:39,894 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:39,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:39,894 INFO L85 PathProgramCache]: Analyzing trace with hash -870186629, now seen corresponding path program 1 times [2021-12-28 02:33:39,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:39,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681565919] [2021-12-28 02:33:39,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:39,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:39,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:39,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:39,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:39,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:33:39,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:39,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:33:39,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:39,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:39,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:39,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:39,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:39,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:33:39,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:39,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:33:39,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:39,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-28 02:33:39,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:39,982 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-28 02:33:39,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:39,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681565919] [2021-12-28 02:33:39,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681565919] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:39,983 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:39,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 02:33:39,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527750770] [2021-12-28 02:33:39,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:39,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 02:33:39,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:39,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 02:33:39,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:33:39,984 INFO L87 Difference]: Start difference. First operand 3730 states and 4666 transitions. Second operand has 8 states, 8 states have (on average 7.875) internal successors, (63), 5 states have internal predecessors, (63), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-28 02:33:41,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:41,196 INFO L93 Difference]: Finished difference Result 10338 states and 12689 transitions. [2021-12-28 02:33:41,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-28 02:33:41,197 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 5 states have internal predecessors, (63), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 84 [2021-12-28 02:33:41,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:41,221 INFO L225 Difference]: With dead ends: 10338 [2021-12-28 02:33:41,222 INFO L226 Difference]: Without dead ends: 5962 [2021-12-28 02:33:41,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2021-12-28 02:33:41,231 INFO L933 BasicCegarLoop]: 815 mSDtfsCounter, 1957 mSDsluCounter, 1517 mSDsCounter, 0 mSdLazyCounter, 1096 mSolverCounterSat, 356 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1969 SdHoareTripleChecker+Valid, 2332 SdHoareTripleChecker+Invalid, 1452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 356 IncrementalHoareTripleChecker+Valid, 1096 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:41,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1969 Valid, 2332 Invalid, 1452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [356 Valid, 1096 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-28 02:33:41,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5962 states. [2021-12-28 02:33:41,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5962 to 5698. [2021-12-28 02:33:41,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5698 states, 4458 states have (on average 1.2292507851054284) internal successors, (5480), 4540 states have internal predecessors, (5480), 610 states have call successors, (610), 504 states have call predecessors, (610), 628 states have return successors, (903), 658 states have call predecessors, (903), 607 states have call successors, (903) [2021-12-28 02:33:41,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5698 states to 5698 states and 6993 transitions. [2021-12-28 02:33:41,514 INFO L78 Accepts]: Start accepts. Automaton has 5698 states and 6993 transitions. Word has length 84 [2021-12-28 02:33:41,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:41,514 INFO L470 AbstractCegarLoop]: Abstraction has 5698 states and 6993 transitions. [2021-12-28 02:33:41,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 5 states have internal predecessors, (63), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-28 02:33:41,515 INFO L276 IsEmpty]: Start isEmpty. Operand 5698 states and 6993 transitions. [2021-12-28 02:33:41,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-28 02:33:41,517 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:41,518 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:33:41,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-28 02:33:41,518 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:41,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:41,519 INFO L85 PathProgramCache]: Analyzing trace with hash -780260845, now seen corresponding path program 1 times [2021-12-28 02:33:41,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:41,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691127703] [2021-12-28 02:33:41,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:41,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:41,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:41,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:41,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:41,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:33:41,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:41,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:33:41,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:41,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:41,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:41,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:41,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:41,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:33:41,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:41,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:33:41,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:41,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-28 02:33:41,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:41,601 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-28 02:33:41,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:41,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691127703] [2021-12-28 02:33:41,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691127703] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:41,601 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:41,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-28 02:33:41,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530204269] [2021-12-28 02:33:41,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:41,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 02:33:41,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:41,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 02:33:41,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-28 02:33:41,603 INFO L87 Difference]: Start difference. First operand 5698 states and 6993 transitions. Second operand has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-28 02:33:42,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:42,959 INFO L93 Difference]: Finished difference Result 9345 states and 11351 transitions. [2021-12-28 02:33:42,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-28 02:33:42,960 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 93 [2021-12-28 02:33:42,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:42,974 INFO L225 Difference]: With dead ends: 9345 [2021-12-28 02:33:42,975 INFO L226 Difference]: Without dead ends: 4796 [2021-12-28 02:33:42,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2021-12-28 02:33:42,985 INFO L933 BasicCegarLoop]: 796 mSDtfsCounter, 2031 mSDsluCounter, 2306 mSDsCounter, 0 mSdLazyCounter, 1492 mSolverCounterSat, 338 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2071 SdHoareTripleChecker+Valid, 3102 SdHoareTripleChecker+Invalid, 1830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 338 IncrementalHoareTripleChecker+Valid, 1492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:42,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2071 Valid, 3102 Invalid, 1830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [338 Valid, 1492 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-28 02:33:42,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4796 states. [2021-12-28 02:33:43,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4796 to 4365. [2021-12-28 02:33:43,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4365 states, 3411 states have (on average 1.2189973614775726) internal successors, (4158), 3476 states have internal predecessors, (4158), 467 states have call successors, (467), 379 states have call predecessors, (467), 485 states have return successors, (645), 514 states have call predecessors, (645), 464 states have call successors, (645) [2021-12-28 02:33:43,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4365 states to 4365 states and 5270 transitions. [2021-12-28 02:33:43,240 INFO L78 Accepts]: Start accepts. Automaton has 4365 states and 5270 transitions. Word has length 93 [2021-12-28 02:33:43,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:43,241 INFO L470 AbstractCegarLoop]: Abstraction has 4365 states and 5270 transitions. [2021-12-28 02:33:43,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-28 02:33:43,241 INFO L276 IsEmpty]: Start isEmpty. Operand 4365 states and 5270 transitions. [2021-12-28 02:33:43,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-28 02:33:43,246 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:43,247 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:33:43,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-28 02:33:43,247 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:43,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:43,248 INFO L85 PathProgramCache]: Analyzing trace with hash 464257645, now seen corresponding path program 1 times [2021-12-28 02:33:43,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:43,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401384019] [2021-12-28 02:33:43,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:43,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:43,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:43,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:43,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:43,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:33:43,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:43,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:33:43,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:43,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:43,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:43,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:43,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:43,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:33:43,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:43,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:33:43,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:43,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-28 02:33:43,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:43,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-28 02:33:43,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:43,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-28 02:33:43,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:43,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-28 02:33:43,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:43,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:43,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:43,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:43,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:43,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-28 02:33:43,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:43,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-28 02:33:43,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:43,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-12-28 02:33:43,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:43,385 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-28 02:33:43,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:43,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401384019] [2021-12-28 02:33:43,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401384019] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:33:43,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336547823] [2021-12-28 02:33:43,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:43,386 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:33:43,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:33:43,388 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) [2021-12-28 02:33:43,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-28 02:33:43,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:43,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-28 02:33:43,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:33:43,762 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-28 02:33:43,762 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 02:33:43,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336547823] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:43,763 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 02:33:43,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 12 [2021-12-28 02:33:43,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014411354] [2021-12-28 02:33:43,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:43,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 02:33:43,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:43,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 02:33:43,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-12-28 02:33:43,766 INFO L87 Difference]: Start difference. First operand 4365 states and 5270 transitions. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-28 02:33:43,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:43,926 INFO L93 Difference]: Finished difference Result 6585 states and 7909 transitions. [2021-12-28 02:33:43,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 02:33:43,926 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 145 [2021-12-28 02:33:43,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:43,934 INFO L225 Difference]: With dead ends: 6585 [2021-12-28 02:33:43,934 INFO L226 Difference]: Without dead ends: 2646 [2021-12-28 02:33:43,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-28 02:33:43,943 INFO L933 BasicCegarLoop]: 773 mSDtfsCounter, 34 mSDsluCounter, 3055 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 3828 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:43,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 3828 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:33:43,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2646 states. [2021-12-28 02:33:44,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2646 to 2490. [2021-12-28 02:33:44,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2490 states, 2036 states have (on average 1.2426326129666012) internal successors, (2530), 2055 states have internal predecessors, (2530), 229 states have call successors, (229), 173 states have call predecessors, (229), 223 states have return successors, (309), 262 states have call predecessors, (309), 226 states have call successors, (309) [2021-12-28 02:33:44,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2490 states to 2490 states and 3068 transitions. [2021-12-28 02:33:44,113 INFO L78 Accepts]: Start accepts. Automaton has 2490 states and 3068 transitions. Word has length 145 [2021-12-28 02:33:44,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:44,113 INFO L470 AbstractCegarLoop]: Abstraction has 2490 states and 3068 transitions. [2021-12-28 02:33:44,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-28 02:33:44,113 INFO L276 IsEmpty]: Start isEmpty. Operand 2490 states and 3068 transitions. [2021-12-28 02:33:44,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-28 02:33:44,118 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:44,118 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:33:44,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-28 02:33:44,344 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,SelfDestructingSolverStorable13 [2021-12-28 02:33:44,344 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:44,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:44,344 INFO L85 PathProgramCache]: Analyzing trace with hash -21978279, now seen corresponding path program 1 times [2021-12-28 02:33:44,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:44,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721555040] [2021-12-28 02:33:44,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:44,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:44,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:44,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:44,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:44,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:33:44,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:44,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:33:44,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:44,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:44,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:44,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:44,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:44,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:33:44,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:44,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:33:44,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:44,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-28 02:33:44,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:44,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-28 02:33:44,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:44,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-28 02:33:44,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:44,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-28 02:33:44,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:44,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:44,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:44,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:44,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:44,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-28 02:33:44,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:44,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-28 02:33:44,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:44,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-28 02:33:44,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:44,435 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-12-28 02:33:44,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:44,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721555040] [2021-12-28 02:33:44,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721555040] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:44,436 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:44,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 02:33:44,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296965080] [2021-12-28 02:33:44,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:44,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 02:33:44,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:44,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 02:33:44,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-28 02:33:44,438 INFO L87 Difference]: Start difference. First operand 2490 states and 3068 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-28 02:33:45,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:45,036 INFO L93 Difference]: Finished difference Result 2544 states and 3124 transitions. [2021-12-28 02:33:45,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 02:33:45,036 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 147 [2021-12-28 02:33:45,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:45,040 INFO L225 Difference]: With dead ends: 2544 [2021-12-28 02:33:45,041 INFO L226 Difference]: Without dead ends: 2026 [2021-12-28 02:33:45,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-28 02:33:45,043 INFO L933 BasicCegarLoop]: 751 mSDtfsCounter, 1128 mSDsluCounter, 1015 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1142 SdHoareTripleChecker+Valid, 1766 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:45,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1142 Valid, 1766 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-28 02:33:45,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2026 states. [2021-12-28 02:33:45,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2026 to 1975. [2021-12-28 02:33:45,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1975 states, 1639 states have (on average 1.2684563758389262) internal successors, (2079), 1654 states have internal predecessors, (2079), 172 states have call successors, (172), 124 states have call predecessors, (172), 162 states have return successors, (231), 197 states have call predecessors, (231), 169 states have call successors, (231) [2021-12-28 02:33:45,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1975 states to 1975 states and 2482 transitions. [2021-12-28 02:33:45,138 INFO L78 Accepts]: Start accepts. Automaton has 1975 states and 2482 transitions. Word has length 147 [2021-12-28 02:33:45,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:45,138 INFO L470 AbstractCegarLoop]: Abstraction has 1975 states and 2482 transitions. [2021-12-28 02:33:45,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-28 02:33:45,138 INFO L276 IsEmpty]: Start isEmpty. Operand 1975 states and 2482 transitions. [2021-12-28 02:33:45,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-28 02:33:45,142 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:45,142 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:33:45,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-28 02:33:45,142 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:45,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:45,143 INFO L85 PathProgramCache]: Analyzing trace with hash 848578871, now seen corresponding path program 1 times [2021-12-28 02:33:45,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:45,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355201851] [2021-12-28 02:33:45,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:45,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:45,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:45,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:45,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:45,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:33:45,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:45,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:33:45,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:45,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:45,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:45,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:45,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:45,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:33:45,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:45,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:33:45,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:45,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-28 02:33:45,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:45,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-28 02:33:45,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:45,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-28 02:33:45,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:45,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-28 02:33:45,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:45,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:45,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:45,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:45,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:45,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-28 02:33:45,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:45,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-28 02:33:45,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:45,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-12-28 02:33:45,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:45,243 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-28 02:33:45,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:45,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355201851] [2021-12-28 02:33:45,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355201851] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:45,243 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:45,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:33:45,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350484455] [2021-12-28 02:33:45,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:45,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:33:45,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:45,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:33:45,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:33:45,245 INFO L87 Difference]: Start difference. First operand 1975 states and 2482 transitions. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 4 states have internal predecessors, (94), 3 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-12-28 02:33:46,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:46,041 INFO L93 Difference]: Finished difference Result 3258 states and 4002 transitions. [2021-12-28 02:33:46,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 02:33:46,042 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 4 states have internal predecessors, (94), 3 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 159 [2021-12-28 02:33:46,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:46,046 INFO L225 Difference]: With dead ends: 3258 [2021-12-28 02:33:46,046 INFO L226 Difference]: Without dead ends: 1868 [2021-12-28 02:33:46,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-28 02:33:46,049 INFO L933 BasicCegarLoop]: 783 mSDtfsCounter, 721 mSDsluCounter, 1853 mSDsCounter, 0 mSdLazyCounter, 1021 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 722 SdHoareTripleChecker+Valid, 2636 SdHoareTripleChecker+Invalid, 1120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:46,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [722 Valid, 2636 Invalid, 1120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1021 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-28 02:33:46,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1868 states. [2021-12-28 02:33:46,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1868 to 1722. [2021-12-28 02:33:46,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1722 states, 1437 states have (on average 1.2867084203201113) internal successors, (1849), 1452 states have internal predecessors, (1849), 147 states have call successors, (147), 103 states have call predecessors, (147), 136 states have return successors, (193), 167 states have call predecessors, (193), 144 states have call successors, (193) [2021-12-28 02:33:46,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1722 states to 1722 states and 2189 transitions. [2021-12-28 02:33:46,127 INFO L78 Accepts]: Start accepts. Automaton has 1722 states and 2189 transitions. Word has length 159 [2021-12-28 02:33:46,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:46,128 INFO L470 AbstractCegarLoop]: Abstraction has 1722 states and 2189 transitions. [2021-12-28 02:33:46,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 4 states have internal predecessors, (94), 3 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-12-28 02:33:46,128 INFO L276 IsEmpty]: Start isEmpty. Operand 1722 states and 2189 transitions. [2021-12-28 02:33:46,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-12-28 02:33:46,130 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:46,131 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:33:46,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-28 02:33:46,131 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:46,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:46,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1407928022, now seen corresponding path program 1 times [2021-12-28 02:33:46,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:46,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369184719] [2021-12-28 02:33:46,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:46,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:46,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:46,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:46,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:46,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:33:46,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:46,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:33:46,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:46,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:46,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:46,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:46,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:46,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:33:46,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:46,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:33:46,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:46,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-28 02:33:46,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:46,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-28 02:33:46,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:46,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-28 02:33:46,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:46,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-28 02:33:46,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:46,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:46,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:46,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:46,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:46,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-28 02:33:46,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:46,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-12-28 02:33:46,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:46,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-28 02:33:46,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:46,292 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 25 proven. 7 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-28 02:33:46,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:46,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369184719] [2021-12-28 02:33:46,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369184719] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:33:46,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047372933] [2021-12-28 02:33:46,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:46,293 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:33:46,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:33:46,294 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) [2021-12-28 02:33:46,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-28 02:33:46,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:46,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 655 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-28 02:33:46,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:33:46,773 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-28 02:33:46,774 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 02:33:46,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047372933] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:46,774 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 02:33:46,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2021-12-28 02:33:46,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630832030] [2021-12-28 02:33:46,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:46,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 02:33:46,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:46,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 02:33:46,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-12-28 02:33:46,775 INFO L87 Difference]: Start difference. First operand 1722 states and 2189 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 2 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-28 02:33:47,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:47,254 INFO L93 Difference]: Finished difference Result 4048 states and 4997 transitions. [2021-12-28 02:33:47,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 02:33:47,255 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 2 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 162 [2021-12-28 02:33:47,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:47,263 INFO L225 Difference]: With dead ends: 4048 [2021-12-28 02:33:47,263 INFO L226 Difference]: Without dead ends: 2638 [2021-12-28 02:33:47,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-12-28 02:33:47,268 INFO L933 BasicCegarLoop]: 759 mSDtfsCounter, 398 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 1506 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:47,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [403 Valid, 1506 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-28 02:33:47,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2638 states. [2021-12-28 02:33:47,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2638 to 2596. [2021-12-28 02:33:47,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2596 states, 2168 states have (on average 1.238929889298893) internal successors, (2686), 2187 states have internal predecessors, (2686), 217 states have call successors, (217), 154 states have call predecessors, (217), 209 states have return successors, (304), 255 states have call predecessors, (304), 214 states have call successors, (304) [2021-12-28 02:33:47,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2596 states to 2596 states and 3207 transitions. [2021-12-28 02:33:47,400 INFO L78 Accepts]: Start accepts. Automaton has 2596 states and 3207 transitions. Word has length 162 [2021-12-28 02:33:47,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:47,400 INFO L470 AbstractCegarLoop]: Abstraction has 2596 states and 3207 transitions. [2021-12-28 02:33:47,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 2 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-28 02:33:47,401 INFO L276 IsEmpty]: Start isEmpty. Operand 2596 states and 3207 transitions. [2021-12-28 02:33:47,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-28 02:33:47,403 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:47,403 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:33:47,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-28 02:33:47,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:33:47,618 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:47,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:47,618 INFO L85 PathProgramCache]: Analyzing trace with hash -60640515, now seen corresponding path program 1 times [2021-12-28 02:33:47,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:47,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064305105] [2021-12-28 02:33:47,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:47,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:47,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:47,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:47,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:47,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-28 02:33:47,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:47,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-28 02:33:47,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:47,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-28 02:33:47,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:47,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-28 02:33:47,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:47,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:33:47,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:47,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064305105] [2021-12-28 02:33:47,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064305105] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:47,753 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:47,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 02:33:47,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082044681] [2021-12-28 02:33:47,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:47,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 02:33:47,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:47,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 02:33:47,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 02:33:47,755 INFO L87 Difference]: Start difference. First operand 2596 states and 3207 transitions. Second operand has 5 states, 5 states have (on average 35.8) internal successors, (179), 3 states have internal predecessors, (179), 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) [2021-12-28 02:33:49,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:49,632 INFO L93 Difference]: Finished difference Result 3150 states and 4107 transitions. [2021-12-28 02:33:49,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 02:33:49,633 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 35.8) internal successors, (179), 3 states have internal predecessors, (179), 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 190 [2021-12-28 02:33:49,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:49,639 INFO L225 Difference]: With dead ends: 3150 [2021-12-28 02:33:49,640 INFO L226 Difference]: Without dead ends: 2749 [2021-12-28 02:33:49,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-28 02:33:49,642 INFO L933 BasicCegarLoop]: 836 mSDtfsCounter, 1217 mSDsluCounter, 592 mSDsCounter, 0 mSdLazyCounter, 863 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1242 SdHoareTripleChecker+Valid, 1428 SdHoareTripleChecker+Invalid, 959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:49,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1242 Valid, 1428 Invalid, 959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 863 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-28 02:33:49,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2749 states. [2021-12-28 02:33:49,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2749 to 2596. [2021-12-28 02:33:49,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2596 states, 2168 states have (on average 1.238468634686347) internal successors, (2685), 2187 states have internal predecessors, (2685), 217 states have call successors, (217), 154 states have call predecessors, (217), 209 states have return successors, (304), 255 states have call predecessors, (304), 214 states have call successors, (304) [2021-12-28 02:33:49,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2596 states to 2596 states and 3206 transitions. [2021-12-28 02:33:49,833 INFO L78 Accepts]: Start accepts. Automaton has 2596 states and 3206 transitions. Word has length 190 [2021-12-28 02:33:49,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:49,833 INFO L470 AbstractCegarLoop]: Abstraction has 2596 states and 3206 transitions. [2021-12-28 02:33:49,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 35.8) internal successors, (179), 3 states have internal predecessors, (179), 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) [2021-12-28 02:33:49,833 INFO L276 IsEmpty]: Start isEmpty. Operand 2596 states and 3206 transitions. [2021-12-28 02:33:49,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-28 02:33:49,836 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:49,836 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:33:49,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-28 02:33:49,837 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:49,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:49,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1287493055, now seen corresponding path program 1 times [2021-12-28 02:33:49,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:49,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28487045] [2021-12-28 02:33:49,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:49,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:49,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:49,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:49,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:49,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-28 02:33:49,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:49,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-28 02:33:49,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:49,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-28 02:33:49,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:49,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-28 02:33:49,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:49,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:33:49,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:49,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28487045] [2021-12-28 02:33:49,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28487045] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:49,974 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:49,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 02:33:49,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712942657] [2021-12-28 02:33:49,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:49,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 02:33:49,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:49,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 02:33:49,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 02:33:49,978 INFO L87 Difference]: Start difference. First operand 2596 states and 3206 transitions. Second operand has 5 states, 5 states have (on average 35.8) internal successors, (179), 3 states have internal predecessors, (179), 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) [2021-12-28 02:33:51,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:51,831 INFO L93 Difference]: Finished difference Result 3142 states and 4090 transitions. [2021-12-28 02:33:51,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 02:33:51,831 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 35.8) internal successors, (179), 3 states have internal predecessors, (179), 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 190 [2021-12-28 02:33:51,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:51,839 INFO L225 Difference]: With dead ends: 3142 [2021-12-28 02:33:51,839 INFO L226 Difference]: Without dead ends: 2749 [2021-12-28 02:33:51,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-28 02:33:51,842 INFO L933 BasicCegarLoop]: 835 mSDtfsCounter, 1208 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 862 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1233 SdHoareTripleChecker+Valid, 1426 SdHoareTripleChecker+Invalid, 958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:51,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1233 Valid, 1426 Invalid, 958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 862 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-28 02:33:51,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2749 states. [2021-12-28 02:33:52,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2749 to 2596. [2021-12-28 02:33:52,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2596 states, 2168 states have (on average 1.2380073800738007) internal successors, (2684), 2187 states have internal predecessors, (2684), 217 states have call successors, (217), 154 states have call predecessors, (217), 209 states have return successors, (304), 255 states have call predecessors, (304), 214 states have call successors, (304) [2021-12-28 02:33:52,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2596 states to 2596 states and 3205 transitions. [2021-12-28 02:33:52,055 INFO L78 Accepts]: Start accepts. Automaton has 2596 states and 3205 transitions. Word has length 190 [2021-12-28 02:33:52,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:52,056 INFO L470 AbstractCegarLoop]: Abstraction has 2596 states and 3205 transitions. [2021-12-28 02:33:52,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 35.8) internal successors, (179), 3 states have internal predecessors, (179), 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) [2021-12-28 02:33:52,056 INFO L276 IsEmpty]: Start isEmpty. Operand 2596 states and 3205 transitions. [2021-12-28 02:33:52,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-28 02:33:52,059 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:52,059 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:33:52,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-28 02:33:52,059 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:52,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:52,060 INFO L85 PathProgramCache]: Analyzing trace with hash 2118146689, now seen corresponding path program 1 times [2021-12-28 02:33:52,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:52,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595870714] [2021-12-28 02:33:52,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:52,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:52,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:52,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:52,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:52,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-28 02:33:52,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:52,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-28 02:33:52,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:52,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-28 02:33:52,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:52,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-28 02:33:52,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:52,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:33:52,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:52,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595870714] [2021-12-28 02:33:52,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595870714] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:52,221 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:52,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 02:33:52,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624840064] [2021-12-28 02:33:52,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:52,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 02:33:52,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:52,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 02:33:52,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 02:33:52,224 INFO L87 Difference]: Start difference. First operand 2596 states and 3205 transitions. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 4 states have internal predecessors, (179), 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) [2021-12-28 02:33:55,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:55,151 INFO L93 Difference]: Finished difference Result 3694 states and 4988 transitions. [2021-12-28 02:33:55,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 02:33:55,152 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 4 states have internal predecessors, (179), 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 190 [2021-12-28 02:33:55,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:55,160 INFO L225 Difference]: With dead ends: 3694 [2021-12-28 02:33:55,161 INFO L226 Difference]: Without dead ends: 3308 [2021-12-28 02:33:55,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-28 02:33:55,164 INFO L933 BasicCegarLoop]: 881 mSDtfsCounter, 1894 mSDsluCounter, 1183 mSDsCounter, 0 mSdLazyCounter, 2272 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1924 SdHoareTripleChecker+Valid, 2064 SdHoareTripleChecker+Invalid, 2434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 2272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:55,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1924 Valid, 2064 Invalid, 2434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 2272 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-28 02:33:55,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3308 states. [2021-12-28 02:33:55,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3308 to 3001. [2021-12-28 02:33:55,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3001 states, 2544 states have (on average 1.292059748427673) internal successors, (3287), 2564 states have internal predecessors, (3287), 239 states have call successors, (239), 160 states have call predecessors, (239), 216 states have return successors, (329), 277 states have call predecessors, (329), 236 states have call successors, (329) [2021-12-28 02:33:55,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3001 states to 3001 states and 3855 transitions. [2021-12-28 02:33:55,390 INFO L78 Accepts]: Start accepts. Automaton has 3001 states and 3855 transitions. Word has length 190 [2021-12-28 02:33:55,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:55,391 INFO L470 AbstractCegarLoop]: Abstraction has 3001 states and 3855 transitions. [2021-12-28 02:33:55,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 4 states have internal predecessors, (179), 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) [2021-12-28 02:33:55,391 INFO L276 IsEmpty]: Start isEmpty. Operand 3001 states and 3855 transitions. [2021-12-28 02:33:55,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-28 02:33:55,394 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:55,394 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:33:55,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-28 02:33:55,394 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:55,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:55,395 INFO L85 PathProgramCache]: Analyzing trace with hash 271120253, now seen corresponding path program 1 times [2021-12-28 02:33:55,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:55,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608440027] [2021-12-28 02:33:55,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:55,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:55,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:55,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:55,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:55,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-28 02:33:55,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:55,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-28 02:33:55,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:55,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-28 02:33:55,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:55,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-28 02:33:55,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:55,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:33:55,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:55,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608440027] [2021-12-28 02:33:55,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608440027] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:55,538 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:55,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:33:55,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101123208] [2021-12-28 02:33:55,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:55,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:33:55,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:55,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:33:55,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:33:55,540 INFO L87 Difference]: Start difference. First operand 3001 states and 3855 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-28 02:33:59,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:59,333 INFO L93 Difference]: Finished difference Result 4678 states and 6583 transitions. [2021-12-28 02:33:59,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 02:33:59,334 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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 190 [2021-12-28 02:33:59,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:59,341 INFO L225 Difference]: With dead ends: 4678 [2021-12-28 02:33:59,341 INFO L226 Difference]: Without dead ends: 3887 [2021-12-28 02:33:59,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-28 02:33:59,345 INFO L933 BasicCegarLoop]: 1212 mSDtfsCounter, 1925 mSDsluCounter, 2252 mSDsCounter, 0 mSdLazyCounter, 3555 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1955 SdHoareTripleChecker+Valid, 3464 SdHoareTripleChecker+Invalid, 3670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 3555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:59,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1955 Valid, 3464 Invalid, 3670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 3555 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-28 02:33:59,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3887 states. [2021-12-28 02:33:59,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3887 to 3377. [2021-12-28 02:33:59,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3377 states, 2891 states have (on average 1.325492909028018) internal successors, (3832), 2912 states have internal predecessors, (3832), 261 states have call successors, (261), 166 states have call predecessors, (261), 223 states have return successors, (353), 300 states have call predecessors, (353), 258 states have call successors, (353) [2021-12-28 02:33:59,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3377 states to 3377 states and 4446 transitions. [2021-12-28 02:33:59,582 INFO L78 Accepts]: Start accepts. Automaton has 3377 states and 4446 transitions. Word has length 190 [2021-12-28 02:33:59,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:59,582 INFO L470 AbstractCegarLoop]: Abstraction has 3377 states and 4446 transitions. [2021-12-28 02:33:59,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-28 02:33:59,583 INFO L276 IsEmpty]: Start isEmpty. Operand 3377 states and 4446 transitions. [2021-12-28 02:33:59,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-28 02:33:59,589 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:59,589 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:33:59,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-28 02:33:59,589 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:59,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:59,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1652130177, now seen corresponding path program 1 times [2021-12-28 02:33:59,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:59,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89310467] [2021-12-28 02:33:59,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:59,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:59,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:59,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:59,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:59,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-28 02:33:59,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:59,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-28 02:33:59,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:59,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-28 02:33:59,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:59,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-28 02:33:59,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:59,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:33:59,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:59,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89310467] [2021-12-28 02:33:59,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89310467] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:59,751 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:59,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:33:59,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309439180] [2021-12-28 02:33:59,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:59,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:33:59,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:59,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:33:59,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:33:59,753 INFO L87 Difference]: Start difference. First operand 3377 states and 4446 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-28 02:34:03,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:34:03,370 INFO L93 Difference]: Finished difference Result 6129 states and 8914 transitions. [2021-12-28 02:34:03,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 02:34:03,372 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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 190 [2021-12-28 02:34:03,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:34:03,391 INFO L225 Difference]: With dead ends: 6129 [2021-12-28 02:34:03,391 INFO L226 Difference]: Without dead ends: 4962 [2021-12-28 02:34:03,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-28 02:34:03,399 INFO L933 BasicCegarLoop]: 1204 mSDtfsCounter, 1922 mSDsluCounter, 2252 mSDsCounter, 0 mSdLazyCounter, 3557 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1952 SdHoareTripleChecker+Valid, 3456 SdHoareTripleChecker+Invalid, 3675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 3557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-28 02:34:03,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1952 Valid, 3456 Invalid, 3675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 3557 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-28 02:34:03,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4962 states. [2021-12-28 02:34:03,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4962 to 4130. [2021-12-28 02:34:03,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4130 states, 3586 states have (on average 1.3728388176240938) internal successors, (4923), 3609 states have internal predecessors, (4923), 305 states have call successors, (305), 178 states have call predecessors, (305), 237 states have return successors, (405), 346 states have call predecessors, (405), 302 states have call successors, (405) [2021-12-28 02:34:03,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4130 states to 4130 states and 5633 transitions. [2021-12-28 02:34:03,735 INFO L78 Accepts]: Start accepts. Automaton has 4130 states and 5633 transitions. Word has length 190 [2021-12-28 02:34:03,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:34:03,735 INFO L470 AbstractCegarLoop]: Abstraction has 4130 states and 5633 transitions. [2021-12-28 02:34:03,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-28 02:34:03,736 INFO L276 IsEmpty]: Start isEmpty. Operand 4130 states and 5633 transitions. [2021-12-28 02:34:03,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-28 02:34:03,739 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:34:03,740 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:34:03,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-28 02:34:03,740 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:34:03,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:34:03,740 INFO L85 PathProgramCache]: Analyzing trace with hash 918228797, now seen corresponding path program 1 times [2021-12-28 02:34:03,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:34:03,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226511907] [2021-12-28 02:34:03,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:34:03,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:34:03,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:03,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:34:03,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:03,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-28 02:34:03,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:03,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-28 02:34:03,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:03,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-28 02:34:03,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:03,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-28 02:34:03,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:03,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:34:03,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:34:03,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226511907] [2021-12-28 02:34:03,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226511907] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:34:03,888 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:34:03,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:34:03,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395764323] [2021-12-28 02:34:03,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:34:03,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:34:03,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:34:03,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:34:03,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:34:03,890 INFO L87 Difference]: Start difference. First operand 4130 states and 5633 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-28 02:34:05,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:34:05,913 INFO L93 Difference]: Finished difference Result 6870 states and 10092 transitions. [2021-12-28 02:34:05,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 02:34:05,913 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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 190 [2021-12-28 02:34:05,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:34:05,925 INFO L225 Difference]: With dead ends: 6870 [2021-12-28 02:34:05,925 INFO L226 Difference]: Without dead ends: 4950 [2021-12-28 02:34:05,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-28 02:34:05,933 INFO L933 BasicCegarLoop]: 766 mSDtfsCounter, 1523 mSDsluCounter, 1220 mSDsCounter, 0 mSdLazyCounter, 1634 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1554 SdHoareTripleChecker+Valid, 1986 SdHoareTripleChecker+Invalid, 1757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-28 02:34:05,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1554 Valid, 1986 Invalid, 1757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1634 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-28 02:34:05,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4950 states. [2021-12-28 02:34:06,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4950 to 4130. [2021-12-28 02:34:06,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4130 states, 3586 states have (on average 1.3714445064138316) internal successors, (4918), 3609 states have internal predecessors, (4918), 305 states have call successors, (305), 178 states have call predecessors, (305), 237 states have return successors, (405), 346 states have call predecessors, (405), 302 states have call successors, (405) [2021-12-28 02:34:06,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4130 states to 4130 states and 5628 transitions. [2021-12-28 02:34:06,239 INFO L78 Accepts]: Start accepts. Automaton has 4130 states and 5628 transitions. Word has length 190 [2021-12-28 02:34:06,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:34:06,239 INFO L470 AbstractCegarLoop]: Abstraction has 4130 states and 5628 transitions. [2021-12-28 02:34:06,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-28 02:34:06,240 INFO L276 IsEmpty]: Start isEmpty. Operand 4130 states and 5628 transitions. [2021-12-28 02:34:06,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-28 02:34:06,242 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:34:06,243 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:34:06,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-28 02:34:06,243 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:34:06,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:34:06,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1416785599, now seen corresponding path program 1 times [2021-12-28 02:34:06,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:34:06,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143161426] [2021-12-28 02:34:06,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:34:06,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:34:06,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:06,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:34:06,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:06,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-28 02:34:06,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:06,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-28 02:34:06,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:06,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-28 02:34:06,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:06,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-28 02:34:06,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:06,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:34:06,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:34:06,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143161426] [2021-12-28 02:34:06,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143161426] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:34:06,379 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:34:06,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:34:06,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935867108] [2021-12-28 02:34:06,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:34:06,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:34:06,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:34:06,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:34:06,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:34:06,385 INFO L87 Difference]: Start difference. First operand 4130 states and 5628 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-28 02:34:08,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:34:08,184 INFO L93 Difference]: Finished difference Result 6864 states and 10066 transitions. [2021-12-28 02:34:08,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 02:34:08,185 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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 190 [2021-12-28 02:34:08,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:34:08,201 INFO L225 Difference]: With dead ends: 6864 [2021-12-28 02:34:08,201 INFO L226 Difference]: Without dead ends: 4944 [2021-12-28 02:34:08,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-28 02:34:08,211 INFO L933 BasicCegarLoop]: 810 mSDtfsCounter, 1656 mSDsluCounter, 957 mSDsCounter, 0 mSdLazyCounter, 1529 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1687 SdHoareTripleChecker+Valid, 1767 SdHoareTripleChecker+Invalid, 1698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 1529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-28 02:34:08,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1687 Valid, 1767 Invalid, 1698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 1529 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-28 02:34:08,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4944 states. [2021-12-28 02:34:08,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4944 to 4130. [2021-12-28 02:34:08,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4130 states, 3586 states have (on average 1.3700501952035695) internal successors, (4913), 3609 states have internal predecessors, (4913), 305 states have call successors, (305), 178 states have call predecessors, (305), 237 states have return successors, (405), 346 states have call predecessors, (405), 302 states have call successors, (405) [2021-12-28 02:34:08,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4130 states to 4130 states and 5623 transitions. [2021-12-28 02:34:08,629 INFO L78 Accepts]: Start accepts. Automaton has 4130 states and 5623 transitions. Word has length 190 [2021-12-28 02:34:08,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:34:08,629 INFO L470 AbstractCegarLoop]: Abstraction has 4130 states and 5623 transitions. [2021-12-28 02:34:08,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-28 02:34:08,629 INFO L276 IsEmpty]: Start isEmpty. Operand 4130 states and 5623 transitions. [2021-12-28 02:34:08,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-28 02:34:08,632 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:34:08,632 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:34:08,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-28 02:34:08,632 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:34:08,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:34:08,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1987057405, now seen corresponding path program 1 times [2021-12-28 02:34:08,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:34:08,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025348421] [2021-12-28 02:34:08,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:34:08,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:34:08,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:08,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:34:08,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:08,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-28 02:34:08,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:08,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-28 02:34:08,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:08,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-28 02:34:08,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:08,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-28 02:34:08,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:08,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:34:08,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:34:08,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025348421] [2021-12-28 02:34:08,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025348421] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:34:08,780 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:34:08,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:34:08,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655464060] [2021-12-28 02:34:08,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:34:08,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:34:08,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:34:08,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:34:08,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:34:08,782 INFO L87 Difference]: Start difference. First operand 4130 states and 5623 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-28 02:34:10,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:34:10,583 INFO L93 Difference]: Finished difference Result 6852 states and 10028 transitions. [2021-12-28 02:34:10,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 02:34:10,583 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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 190 [2021-12-28 02:34:10,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:34:10,596 INFO L225 Difference]: With dead ends: 6852 [2021-12-28 02:34:10,596 INFO L226 Difference]: Without dead ends: 4932 [2021-12-28 02:34:10,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-28 02:34:10,601 INFO L933 BasicCegarLoop]: 804 mSDtfsCounter, 1652 mSDsluCounter, 957 mSDsCounter, 0 mSdLazyCounter, 1515 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1683 SdHoareTripleChecker+Valid, 1761 SdHoareTripleChecker+Invalid, 1684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 1515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-28 02:34:10,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1683 Valid, 1761 Invalid, 1684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 1515 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-28 02:34:10,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4932 states. [2021-12-28 02:34:10,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4932 to 4130. [2021-12-28 02:34:10,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4130 states, 3586 states have (on average 1.3686558839933074) internal successors, (4908), 3609 states have internal predecessors, (4908), 305 states have call successors, (305), 178 states have call predecessors, (305), 237 states have return successors, (405), 346 states have call predecessors, (405), 302 states have call successors, (405) [2021-12-28 02:34:10,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4130 states to 4130 states and 5618 transitions. [2021-12-28 02:34:10,928 INFO L78 Accepts]: Start accepts. Automaton has 4130 states and 5618 transitions. Word has length 190 [2021-12-28 02:34:10,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:34:10,929 INFO L470 AbstractCegarLoop]: Abstraction has 4130 states and 5618 transitions. [2021-12-28 02:34:10,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-28 02:34:10,929 INFO L276 IsEmpty]: Start isEmpty. Operand 4130 states and 5618 transitions. [2021-12-28 02:34:10,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-28 02:34:10,931 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:34:10,931 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:34:10,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-28 02:34:10,932 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:34:10,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:34:10,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1201059515, now seen corresponding path program 1 times [2021-12-28 02:34:10,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:34:10,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322804141] [2021-12-28 02:34:10,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:34:10,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:34:10,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:10,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:34:10,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:11,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-28 02:34:11,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:11,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-28 02:34:11,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:11,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-28 02:34:11,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:11,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-28 02:34:11,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:34:11,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:34:11,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:34:11,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322804141] [2021-12-28 02:34:11,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322804141] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:34:11,091 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:34:11,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:34:11,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363327489] [2021-12-28 02:34:11,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:34:11,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:34:11,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:34:11,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:34:11,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:34:11,093 INFO L87 Difference]: Start difference. First operand 4130 states and 5618 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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)