./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.10.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.10.cil-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5fa3500dbb7b48d33bda6025d194df10b5d868e3a16ab8452fef68790ebc5c6f --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 20:38:18,070 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 20:38:18,072 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 20:38:18,126 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 20:38:18,127 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 20:38:18,128 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 20:38:18,129 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 20:38:18,131 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 20:38:18,132 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 20:38:18,135 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 20:38:18,136 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 20:38:18,137 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 20:38:18,137 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 20:38:18,139 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 20:38:18,140 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 20:38:18,142 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 20:38:18,142 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 20:38:18,143 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 20:38:18,144 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 20:38:18,149 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 20:38:18,150 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 20:38:18,150 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 20:38:18,151 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 20:38:18,152 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 20:38:18,152 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 20:38:18,157 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 20:38:18,158 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 20:38:18,158 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 20:38:18,159 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 20:38:18,159 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 20:38:18,160 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 20:38:18,160 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 20:38:18,161 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 20:38:18,162 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 20:38:18,162 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 20:38:18,163 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 20:38:18,163 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 20:38:18,163 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 20:38:18,163 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 20:38:18,164 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 20:38:18,164 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 20:38:18,165 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 20:38:18,166 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 20:38:18,186 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 20:38:18,187 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 20:38:18,187 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 20:38:18,187 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 20:38:18,188 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 20:38:18,188 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 20:38:18,188 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 20:38:18,188 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 20:38:18,188 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 20:38:18,189 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 20:38:18,189 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 20:38:18,189 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 20:38:18,190 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 20:38:18,190 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 20:38:18,190 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 20:38:18,190 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 20:38:18,190 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 20:38:18,190 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 20:38:18,191 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 20:38:18,191 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 20:38:18,191 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 20:38:18,192 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 20:38:18,192 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 20:38:18,192 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 20:38:18,192 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 20:38:18,192 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 20:38:18,192 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 20:38:18,193 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 20:38:18,193 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 20:38:18,193 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 20:38:18,193 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 20:38:18,193 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 20:38:18,193 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 20:38:18,194 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5fa3500dbb7b48d33bda6025d194df10b5d868e3a16ab8452fef68790ebc5c6f [2022-07-19 20:38:18,350 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 20:38:18,369 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 20:38:18,370 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 20:38:18,371 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 20:38:18,372 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 20:38:18,373 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.10.cil-1.c [2022-07-19 20:38:18,419 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c44d29d0/9dfa2d57c6574207ac27d2030d698938/FLAG022b3086c [2022-07-19 20:38:18,804 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 20:38:18,804 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.10.cil-1.c [2022-07-19 20:38:18,820 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c44d29d0/9dfa2d57c6574207ac27d2030d698938/FLAG022b3086c [2022-07-19 20:38:18,834 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c44d29d0/9dfa2d57c6574207ac27d2030d698938 [2022-07-19 20:38:18,836 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 20:38:18,838 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 20:38:18,840 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 20:38:18,840 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 20:38:18,842 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 20:38:18,842 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 08:38:18" (1/1) ... [2022-07-19 20:38:18,843 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27ef4b9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:38:18, skipping insertion in model container [2022-07-19 20:38:18,843 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 08:38:18" (1/1) ... [2022-07-19 20:38:18,847 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 20:38:18,888 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 20:38:19,007 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.10.cil-1.c[911,924] [2022-07-19 20:38:19,073 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.10.cil-1.c[8416,8429] [2022-07-19 20:38:19,136 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 20:38:19,150 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 20:38:19,159 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.10.cil-1.c[911,924] [2022-07-19 20:38:19,176 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.10.cil-1.c[8416,8429] [2022-07-19 20:38:19,205 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 20:38:19,223 INFO L208 MainTranslator]: Completed translation [2022-07-19 20:38:19,224 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:38:19 WrapperNode [2022-07-19 20:38:19,224 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 20:38:19,224 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 20:38:19,225 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 20:38:19,225 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 20:38:19,230 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:38:19" (1/1) ... [2022-07-19 20:38:19,241 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:38:19" (1/1) ... [2022-07-19 20:38:19,281 INFO L137 Inliner]: procedures = 75, calls = 92, calls flagged for inlining = 43, calls inlined = 43, statements flattened = 967 [2022-07-19 20:38:19,282 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 20:38:19,282 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 20:38:19,282 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 20:38:19,283 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 20:38:19,288 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:38:19" (1/1) ... [2022-07-19 20:38:19,296 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:38:19" (1/1) ... [2022-07-19 20:38:19,300 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:38:19" (1/1) ... [2022-07-19 20:38:19,300 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:38:19" (1/1) ... [2022-07-19 20:38:19,309 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:38:19" (1/1) ... [2022-07-19 20:38:19,335 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:38:19" (1/1) ... [2022-07-19 20:38:19,349 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:38:19" (1/1) ... [2022-07-19 20:38:19,353 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 20:38:19,353 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 20:38:19,354 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 20:38:19,354 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 20:38:19,354 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:38:19" (1/1) ... [2022-07-19 20:38:19,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 20:38:19,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 20:38:19,400 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) [2022-07-19 20:38:19,423 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 [2022-07-19 20:38:19,433 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 20:38:19,434 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-07-19 20:38:19,434 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-07-19 20:38:19,434 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-07-19 20:38:19,434 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-07-19 20:38:19,434 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-07-19 20:38:19,434 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-07-19 20:38:19,434 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-07-19 20:38:19,434 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-07-19 20:38:19,434 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-07-19 20:38:19,435 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-07-19 20:38:19,435 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-07-19 20:38:19,435 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-07-19 20:38:19,435 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-07-19 20:38:19,435 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-07-19 20:38:19,435 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-07-19 20:38:19,435 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-07-19 20:38:19,435 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-07-19 20:38:19,436 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-07-19 20:38:19,436 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-07-19 20:38:19,436 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-07-19 20:38:19,436 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-07-19 20:38:19,436 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-07-19 20:38:19,436 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 20:38:19,436 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-07-19 20:38:19,436 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-07-19 20:38:19,437 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-07-19 20:38:19,437 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-07-19 20:38:19,437 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 20:38:19,437 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 20:38:19,437 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-07-19 20:38:19,437 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-07-19 20:38:19,437 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2022-07-19 20:38:19,437 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2022-07-19 20:38:19,516 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 20:38:19,518 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 20:38:20,060 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##56: assume !(1 == ~q_free~0); [2022-07-19 20:38:20,060 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##55: assume 1 == ~q_free~0;~c_dr_st~0 := 2;~c_dr_pc~0 := 2;~a_t~0 := do_read_c_~a~0#1; [2022-07-19 20:38:20,110 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 20:38:20,136 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 20:38:20,137 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2022-07-19 20:38:20,138 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 08:38:20 BoogieIcfgContainer [2022-07-19 20:38:20,139 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 20:38:20,140 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 20:38:20,140 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 20:38:20,148 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 20:38:20,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 08:38:18" (1/3) ... [2022-07-19 20:38:20,148 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43d07a51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 08:38:20, skipping insertion in model container [2022-07-19 20:38:20,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:38:19" (2/3) ... [2022-07-19 20:38:20,149 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43d07a51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 08:38:20, skipping insertion in model container [2022-07-19 20:38:20,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 08:38:20" (3/3) ... [2022-07-19 20:38:20,151 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_3.cil+token_ring.10.cil-1.c [2022-07-19 20:38:20,160 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 20:38:20,161 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-19 20:38:20,205 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 20:38:20,210 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@15a6bcae, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7d1dbdd9 [2022-07-19 20:38:20,210 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 20:38:20,224 INFO L276 IsEmpty]: Start isEmpty. Operand has 457 states, 397 states have (on average 1.6347607052896724) internal successors, (649), 405 states have internal predecessors, (649), 42 states have call successors, (42), 15 states have call predecessors, (42), 15 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) [2022-07-19 20:38:20,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-19 20:38:20,232 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:38:20,233 INFO L195 NwaCegarLoop]: 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] [2022-07-19 20:38:20,233 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:38:20,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:38:20,237 INFO L85 PathProgramCache]: Analyzing trace with hash -2009342201, now seen corresponding path program 1 times [2022-07-19 20:38:20,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:38:20,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245040007] [2022-07-19 20:38:20,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:38:20,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:38:20,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:20,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:38:20,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:20,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 20:38:20,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:20,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-19 20:38:20,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:20,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 20:38:20,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:20,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-19 20:38:20,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:20,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 20:38:20,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:20,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 20:38:20,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:20,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:38:20,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:38:20,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245040007] [2022-07-19 20:38:20,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245040007] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:38:20,543 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:38:20,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-19 20:38:20,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523898193] [2022-07-19 20:38:20,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:38:20,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 20:38:20,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:38:20,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 20:38:20,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-19 20:38:20,569 INFO L87 Difference]: Start difference. First operand has 457 states, 397 states have (on average 1.6347607052896724) internal successors, (649), 405 states have internal predecessors, (649), 42 states have call successors, (42), 15 states have call predecessors, (42), 15 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) 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) [2022-07-19 20:38:21,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:38:21,496 INFO L93 Difference]: Finished difference Result 1038 states and 1657 transitions. [2022-07-19 20:38:21,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 20:38:21,498 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 [2022-07-19 20:38:21,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:38:21,508 INFO L225 Difference]: With dead ends: 1038 [2022-07-19 20:38:21,508 INFO L226 Difference]: Without dead ends: 597 [2022-07-19 20:38:21,512 INFO L412 NwaCegarLoop]: 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 [2022-07-19 20:38:21,514 INFO L413 NwaCegarLoop]: 697 mSDtfsCounter, 1154 mSDsluCounter, 1314 mSDsCounter, 0 mSdLazyCounter, 999 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1161 SdHoareTripleChecker+Valid, 2011 SdHoareTripleChecker+Invalid, 1208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 20:38:21,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1161 Valid, 2011 Invalid, 1208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 999 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-19 20:38:21,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2022-07-19 20:38:21,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 558. [2022-07-19 20:38:21,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 479 states have (on average 1.524008350730689) internal successors, (730), 486 states have internal predecessors, (730), 55 states have call successors, (55), 22 states have call predecessors, (55), 22 states have return successors, (56), 52 states have call predecessors, (56), 51 states have call successors, (56) [2022-07-19 20:38:21,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 841 transitions. [2022-07-19 20:38:21,587 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 841 transitions. Word has length 65 [2022-07-19 20:38:21,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:38:21,588 INFO L495 AbstractCegarLoop]: Abstraction has 558 states and 841 transitions. [2022-07-19 20:38:21,588 INFO L496 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) [2022-07-19 20:38:21,588 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 841 transitions. [2022-07-19 20:38:21,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-19 20:38:21,591 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:38:21,591 INFO L195 NwaCegarLoop]: 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] [2022-07-19 20:38:21,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 20:38:21,591 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:38:21,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:38:21,592 INFO L85 PathProgramCache]: Analyzing trace with hash -330453561, now seen corresponding path program 1 times [2022-07-19 20:38:21,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:38:21,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993466896] [2022-07-19 20:38:21,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:38:21,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:38:21,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:21,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:38:21,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:21,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 20:38:21,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:21,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-19 20:38:21,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:21,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 20:38:21,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:21,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-19 20:38:21,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:21,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 20:38:21,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:21,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 20:38:21,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:21,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:38:21,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:38:21,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993466896] [2022-07-19 20:38:21,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993466896] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:38:21,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:38:21,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-19 20:38:21,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512365016] [2022-07-19 20:38:21,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:38:21,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 20:38:21,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:38:21,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 20:38:21,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-19 20:38:21,708 INFO L87 Difference]: Start difference. First operand 558 states and 841 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) [2022-07-19 20:38:22,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:38:22,611 INFO L93 Difference]: Finished difference Result 955 states and 1407 transitions. [2022-07-19 20:38:22,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-19 20:38:22,612 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 [2022-07-19 20:38:22,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:38:22,618 INFO L225 Difference]: With dead ends: 955 [2022-07-19 20:38:22,620 INFO L226 Difference]: Without dead ends: 746 [2022-07-19 20:38:22,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2022-07-19 20:38:22,622 INFO L413 NwaCegarLoop]: 762 mSDtfsCounter, 1326 mSDsluCounter, 1921 mSDsCounter, 0 mSdLazyCounter, 1422 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1356 SdHoareTripleChecker+Valid, 2683 SdHoareTripleChecker+Invalid, 1559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 1422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 20:38:22,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1356 Valid, 2683 Invalid, 1559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 1422 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-19 20:38:22,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2022-07-19 20:38:22,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 670. [2022-07-19 20:38:22,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 569 states have (on average 1.5043936731107206) internal successors, (856), 578 states have internal predecessors, (856), 68 states have call successors, (68), 29 states have call predecessors, (68), 31 states have return successors, (77), 66 states have call predecessors, (77), 64 states have call successors, (77) [2022-07-19 20:38:22,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 1001 transitions. [2022-07-19 20:38:22,706 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 1001 transitions. Word has length 65 [2022-07-19 20:38:22,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:38:22,714 INFO L495 AbstractCegarLoop]: Abstraction has 670 states and 1001 transitions. [2022-07-19 20:38:22,714 INFO L496 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) [2022-07-19 20:38:22,714 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 1001 transitions. [2022-07-19 20:38:22,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-19 20:38:22,721 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:38:22,721 INFO L195 NwaCegarLoop]: 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] [2022-07-19 20:38:22,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 20:38:22,721 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:38:22,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:38:22,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1935927625, now seen corresponding path program 1 times [2022-07-19 20:38:22,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:38:22,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514075377] [2022-07-19 20:38:22,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:38:22,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:38:22,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:22,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:38:22,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:22,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 20:38:22,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:22,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-19 20:38:22,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:22,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 20:38:22,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:22,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-19 20:38:22,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:22,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 20:38:22,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:22,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 20:38:22,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:22,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:38:22,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:38:22,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514075377] [2022-07-19 20:38:22,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514075377] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:38:22,823 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:38:22,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-19 20:38:22,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579455513] [2022-07-19 20:38:22,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:38:22,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 20:38:22,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:38:22,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 20:38:22,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-07-19 20:38:22,824 INFO L87 Difference]: Start difference. First operand 670 states and 1001 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2022-07-19 20:38:24,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:38:24,232 INFO L93 Difference]: Finished difference Result 2216 states and 3199 transitions. [2022-07-19 20:38:24,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-19 20:38:24,233 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) Word has length 65 [2022-07-19 20:38:24,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:38:24,241 INFO L225 Difference]: With dead ends: 2216 [2022-07-19 20:38:24,241 INFO L226 Difference]: Without dead ends: 1883 [2022-07-19 20:38:24,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2022-07-19 20:38:24,243 INFO L413 NwaCegarLoop]: 812 mSDtfsCounter, 3975 mSDsluCounter, 1816 mSDsCounter, 0 mSdLazyCounter, 1722 mSolverCounterSat, 753 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3993 SdHoareTripleChecker+Valid, 2628 SdHoareTripleChecker+Invalid, 2475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 753 IncrementalHoareTripleChecker+Valid, 1722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-19 20:38:24,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3993 Valid, 2628 Invalid, 2475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [753 Valid, 1722 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-19 20:38:24,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1883 states. [2022-07-19 20:38:24,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1883 to 1723. [2022-07-19 20:38:24,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1723 states, 1417 states have (on average 1.4114326040931546) internal successors, (2000), 1441 states have internal predecessors, (2000), 178 states have call successors, (178), 112 states have call predecessors, (178), 126 states have return successors, (210), 172 states have call predecessors, (210), 174 states have call successors, (210) [2022-07-19 20:38:24,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1723 states to 1723 states and 2388 transitions. [2022-07-19 20:38:24,311 INFO L78 Accepts]: Start accepts. Automaton has 1723 states and 2388 transitions. Word has length 65 [2022-07-19 20:38:24,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:38:24,312 INFO L495 AbstractCegarLoop]: Abstraction has 1723 states and 2388 transitions. [2022-07-19 20:38:24,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2022-07-19 20:38:24,312 INFO L276 IsEmpty]: Start isEmpty. Operand 1723 states and 2388 transitions. [2022-07-19 20:38:24,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-19 20:38:24,313 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:38:24,313 INFO L195 NwaCegarLoop]: 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] [2022-07-19 20:38:24,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 20:38:24,313 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:38:24,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:38:24,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1448069129, now seen corresponding path program 1 times [2022-07-19 20:38:24,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:38:24,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271393899] [2022-07-19 20:38:24,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:38:24,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:38:24,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:24,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:38:24,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:24,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 20:38:24,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:24,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-19 20:38:24,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:24,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 20:38:24,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:24,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-19 20:38:24,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:24,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-19 20:38:24,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:24,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-19 20:38:24,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:24,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:38:24,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:38:24,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271393899] [2022-07-19 20:38:24,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271393899] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:38:24,394 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:38:24,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-19 20:38:24,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559002730] [2022-07-19 20:38:24,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:38:24,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 20:38:24,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:38:24,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 20:38:24,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-07-19 20:38:24,411 INFO L87 Difference]: Start difference. First operand 1723 states and 2388 transitions. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-19 20:38:25,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:38:25,263 INFO L93 Difference]: Finished difference Result 3251 states and 4467 transitions. [2022-07-19 20:38:25,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-19 20:38:25,264 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2022-07-19 20:38:25,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:38:25,270 INFO L225 Difference]: With dead ends: 3251 [2022-07-19 20:38:25,270 INFO L226 Difference]: Without dead ends: 1871 [2022-07-19 20:38:25,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-19 20:38:25,273 INFO L413 NwaCegarLoop]: 671 mSDtfsCounter, 875 mSDsluCounter, 2030 mSDsCounter, 0 mSdLazyCounter, 1511 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 876 SdHoareTripleChecker+Valid, 2701 SdHoareTripleChecker+Invalid, 1659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 1511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 20:38:25,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [876 Valid, 2701 Invalid, 1659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 1511 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-19 20:38:25,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1871 states. [2022-07-19 20:38:25,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1871 to 1763. [2022-07-19 20:38:25,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1763 states, 1449 states have (on average 1.3982056590752243) internal successors, (2026), 1473 states have internal predecessors, (2026), 178 states have call successors, (178), 112 states have call predecessors, (178), 134 states have return successors, (218), 180 states have call predecessors, (218), 174 states have call successors, (218) [2022-07-19 20:38:25,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1763 states to 1763 states and 2422 transitions. [2022-07-19 20:38:25,351 INFO L78 Accepts]: Start accepts. Automaton has 1763 states and 2422 transitions. Word has length 66 [2022-07-19 20:38:25,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:38:25,351 INFO L495 AbstractCegarLoop]: Abstraction has 1763 states and 2422 transitions. [2022-07-19 20:38:25,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-19 20:38:25,352 INFO L276 IsEmpty]: Start isEmpty. Operand 1763 states and 2422 transitions. [2022-07-19 20:38:25,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-19 20:38:25,352 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:38:25,352 INFO L195 NwaCegarLoop]: 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] [2022-07-19 20:38:25,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 20:38:25,353 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:38:25,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:38:25,353 INFO L85 PathProgramCache]: Analyzing trace with hash 418709831, now seen corresponding path program 1 times [2022-07-19 20:38:25,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:38:25,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60183247] [2022-07-19 20:38:25,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:38:25,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:38:25,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:25,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:38:25,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:25,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 20:38:25,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:25,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-19 20:38:25,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:25,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 20:38:25,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:25,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-19 20:38:25,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:25,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-19 20:38:25,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:25,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-19 20:38:25,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:25,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:38:25,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:38:25,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60183247] [2022-07-19 20:38:25,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60183247] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:38:25,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:38:25,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-19 20:38:25,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160534404] [2022-07-19 20:38:25,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:38:25,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 20:38:25,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:38:25,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 20:38:25,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-07-19 20:38:25,432 INFO L87 Difference]: Start difference. First operand 1763 states and 2422 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-19 20:38:26,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:38:26,880 INFO L93 Difference]: Finished difference Result 5335 states and 7296 transitions. [2022-07-19 20:38:26,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-19 20:38:26,880 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 66 [2022-07-19 20:38:26,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:38:26,887 INFO L225 Difference]: With dead ends: 5335 [2022-07-19 20:38:26,888 INFO L226 Difference]: Without dead ends: 2154 [2022-07-19 20:38:26,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2022-07-19 20:38:26,893 INFO L413 NwaCegarLoop]: 809 mSDtfsCounter, 3628 mSDsluCounter, 2244 mSDsCounter, 0 mSdLazyCounter, 1794 mSolverCounterSat, 679 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3646 SdHoareTripleChecker+Valid, 3053 SdHoareTripleChecker+Invalid, 2473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 679 IncrementalHoareTripleChecker+Valid, 1794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-19 20:38:26,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3646 Valid, 3053 Invalid, 2473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [679 Valid, 1794 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-19 20:38:26,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2154 states. [2022-07-19 20:38:26,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2154 to 1974. [2022-07-19 20:38:26,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1974 states, 1588 states have (on average 1.3551637279596978) internal successors, (2152), 1614 states have internal predecessors, (2152), 218 states have call successors, (218), 140 states have call predecessors, (218), 166 states have return successors, (264), 222 states have call predecessors, (264), 214 states have call successors, (264) [2022-07-19 20:38:26,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1974 states to 1974 states and 2634 transitions. [2022-07-19 20:38:26,954 INFO L78 Accepts]: Start accepts. Automaton has 1974 states and 2634 transitions. Word has length 66 [2022-07-19 20:38:26,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:38:26,955 INFO L495 AbstractCegarLoop]: Abstraction has 1974 states and 2634 transitions. [2022-07-19 20:38:26,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-19 20:38:26,955 INFO L276 IsEmpty]: Start isEmpty. Operand 1974 states and 2634 transitions. [2022-07-19 20:38:26,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-19 20:38:26,956 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:38:26,956 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:38:26,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 20:38:26,957 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:38:26,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:38:26,957 INFO L85 PathProgramCache]: Analyzing trace with hash -440043302, now seen corresponding path program 1 times [2022-07-19 20:38:26,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:38:26,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583127506] [2022-07-19 20:38:26,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:38:26,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:38:26,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:26,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:38:26,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:26,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 20:38:26,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:26,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-19 20:38:26,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:27,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 20:38:27,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:27,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-19 20:38:27,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:27,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-19 20:38:27,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:27,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-19 20:38:27,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:27,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-19 20:38:27,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:27,043 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-19 20:38:27,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:38:27,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583127506] [2022-07-19 20:38:27,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583127506] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:38:27,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:38:27,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-19 20:38:27,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307349096] [2022-07-19 20:38:27,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:38:27,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 20:38:27,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:38:27,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 20:38:27,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-07-19 20:38:27,045 INFO L87 Difference]: Start difference. First operand 1974 states and 2634 transitions. Second operand has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 5 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-19 20:38:27,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:38:27,886 INFO L93 Difference]: Finished difference Result 3799 states and 5036 transitions. [2022-07-19 20:38:27,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 20:38:27,887 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 5 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 91 [2022-07-19 20:38:27,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:38:27,895 INFO L225 Difference]: With dead ends: 3799 [2022-07-19 20:38:27,895 INFO L226 Difference]: Without dead ends: 2168 [2022-07-19 20:38:27,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-07-19 20:38:27,901 INFO L413 NwaCegarLoop]: 658 mSDtfsCounter, 869 mSDsluCounter, 1995 mSDsCounter, 0 mSdLazyCounter, 1478 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 871 SdHoareTripleChecker+Valid, 2653 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 1478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 20:38:27,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [871 Valid, 2653 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 1478 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-19 20:38:27,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2168 states. [2022-07-19 20:38:27,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2168 to 2034. [2022-07-19 20:38:27,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2034 states, 1636 states have (on average 1.341075794621027) internal successors, (2194), 1662 states have internal predecessors, (2194), 218 states have call successors, (218), 140 states have call predecessors, (218), 178 states have return successors, (276), 234 states have call predecessors, (276), 214 states have call successors, (276) [2022-07-19 20:38:27,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2034 states to 2034 states and 2688 transitions. [2022-07-19 20:38:27,964 INFO L78 Accepts]: Start accepts. Automaton has 2034 states and 2688 transitions. Word has length 91 [2022-07-19 20:38:27,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:38:27,965 INFO L495 AbstractCegarLoop]: Abstraction has 2034 states and 2688 transitions. [2022-07-19 20:38:27,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 5 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-19 20:38:27,965 INFO L276 IsEmpty]: Start isEmpty. Operand 2034 states and 2688 transitions. [2022-07-19 20:38:27,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-19 20:38:27,970 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:38:27,970 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:38:27,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 20:38:27,971 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:38:27,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:38:27,971 INFO L85 PathProgramCache]: Analyzing trace with hash 3857372, now seen corresponding path program 1 times [2022-07-19 20:38:27,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:38:27,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973170776] [2022-07-19 20:38:27,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:38:27,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:38:27,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:28,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:38:28,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:28,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 20:38:28,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:28,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-19 20:38:28,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:28,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 20:38:28,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:28,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-19 20:38:28,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:28,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-19 20:38:28,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:28,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-19 20:38:28,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:28,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-19 20:38:28,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:28,078 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-19 20:38:28,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:38:28,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973170776] [2022-07-19 20:38:28,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973170776] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:38:28,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:38:28,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-19 20:38:28,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460978747] [2022-07-19 20:38:28,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:38:28,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 20:38:28,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:38:28,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 20:38:28,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-19 20:38:28,080 INFO L87 Difference]: Start difference. First operand 2034 states and 2688 transitions. Second operand has 8 states, 8 states have (on average 7.75) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-19 20:38:28,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:38:28,911 INFO L93 Difference]: Finished difference Result 3561 states and 4652 transitions. [2022-07-19 20:38:28,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-19 20:38:28,912 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 91 [2022-07-19 20:38:28,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:38:28,919 INFO L225 Difference]: With dead ends: 3561 [2022-07-19 20:38:28,919 INFO L226 Difference]: Without dead ends: 2108 [2022-07-19 20:38:28,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2022-07-19 20:38:28,925 INFO L413 NwaCegarLoop]: 693 mSDtfsCounter, 1635 mSDsluCounter, 1359 mSDsCounter, 0 mSdLazyCounter, 1213 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1665 SdHoareTripleChecker+Valid, 2052 SdHoareTripleChecker+Invalid, 1427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 1213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 20:38:28,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1665 Valid, 2052 Invalid, 1427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 1213 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-19 20:38:28,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2108 states. [2022-07-19 20:38:29,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2108 to 1813. [2022-07-19 20:38:29,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1813 states, 1468 states have (on average 1.3460490463215258) internal successors, (1976), 1489 states have internal predecessors, (1976), 190 states have call successors, (190), 121 states have call predecessors, (190), 153 states have return successors, (236), 204 states have call predecessors, (236), 186 states have call successors, (236) [2022-07-19 20:38:29,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1813 states to 1813 states and 2402 transitions. [2022-07-19 20:38:29,011 INFO L78 Accepts]: Start accepts. Automaton has 1813 states and 2402 transitions. Word has length 91 [2022-07-19 20:38:29,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:38:29,012 INFO L495 AbstractCegarLoop]: Abstraction has 1813 states and 2402 transitions. [2022-07-19 20:38:29,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-19 20:38:29,013 INFO L276 IsEmpty]: Start isEmpty. Operand 1813 states and 2402 transitions. [2022-07-19 20:38:29,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-19 20:38:29,014 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:38:29,014 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:38:29,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 20:38:29,014 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:38:29,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:38:29,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1943019418, now seen corresponding path program 1 times [2022-07-19 20:38:29,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:38:29,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65489471] [2022-07-19 20:38:29,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:38:29,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:38:29,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:29,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:38:29,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:29,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 20:38:29,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:29,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-19 20:38:29,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:29,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 20:38:29,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:29,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-19 20:38:29,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:29,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-19 20:38:29,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:29,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-19 20:38:29,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:29,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-19 20:38:29,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:29,105 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 20:38:29,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:38:29,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65489471] [2022-07-19 20:38:29,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65489471] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:38:29,106 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:38:29,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 20:38:29,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849557059] [2022-07-19 20:38:29,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:38:29,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 20:38:29,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:38:29,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 20:38:29,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-19 20:38:29,108 INFO L87 Difference]: Start difference. First operand 1813 states and 2402 transitions. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 4 states have internal predecessors, (70), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-19 20:38:29,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:38:29,468 INFO L93 Difference]: Finished difference Result 4965 states and 6514 transitions. [2022-07-19 20:38:29,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 20:38:29,469 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 4 states have internal predecessors, (70), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 91 [2022-07-19 20:38:29,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:38:29,485 INFO L225 Difference]: With dead ends: 4965 [2022-07-19 20:38:29,485 INFO L226 Difference]: Without dead ends: 3496 [2022-07-19 20:38:29,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2022-07-19 20:38:29,491 INFO L413 NwaCegarLoop]: 695 mSDtfsCounter, 1867 mSDsluCounter, 729 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 246 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1899 SdHoareTripleChecker+Valid, 1424 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 20:38:29,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1899 Valid, 1424 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [246 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 20:38:29,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3496 states. [2022-07-19 20:38:29,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3496 to 3282. [2022-07-19 20:38:29,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3282 states, 2617 states have (on average 1.3007260221627819) internal successors, (3404), 2667 states have internal predecessors, (3404), 351 states have call successors, (351), 234 states have call predecessors, (351), 312 states have return successors, (519), 383 states have call predecessors, (519), 347 states have call successors, (519) [2022-07-19 20:38:29,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3282 states to 3282 states and 4274 transitions. [2022-07-19 20:38:29,618 INFO L78 Accepts]: Start accepts. Automaton has 3282 states and 4274 transitions. Word has length 91 [2022-07-19 20:38:29,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:38:29,619 INFO L495 AbstractCegarLoop]: Abstraction has 3282 states and 4274 transitions. [2022-07-19 20:38:29,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 4 states have internal predecessors, (70), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-19 20:38:29,619 INFO L276 IsEmpty]: Start isEmpty. Operand 3282 states and 4274 transitions. [2022-07-19 20:38:29,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-19 20:38:29,620 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:38:29,621 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:38:29,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-19 20:38:29,621 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:38:29,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:38:29,621 INFO L85 PathProgramCache]: Analyzing trace with hash 885181340, now seen corresponding path program 1 times [2022-07-19 20:38:29,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:38:29,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373885002] [2022-07-19 20:38:29,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:38:29,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:38:29,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:29,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:38:29,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:29,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 20:38:29,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:29,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-19 20:38:29,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:29,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 20:38:29,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:29,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-19 20:38:29,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:29,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-19 20:38:29,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:29,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-19 20:38:29,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:29,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-19 20:38:29,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:29,673 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-19 20:38:29,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:38:29,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373885002] [2022-07-19 20:38:29,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373885002] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:38:29,674 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:38:29,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 20:38:29,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236409042] [2022-07-19 20:38:29,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:38:29,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 20:38:29,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:38:29,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 20:38:29,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-19 20:38:29,676 INFO L87 Difference]: Start difference. First operand 3282 states and 4274 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-19 20:38:30,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:38:30,088 INFO L93 Difference]: Finished difference Result 4866 states and 6258 transitions. [2022-07-19 20:38:30,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 20:38:30,088 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 91 [2022-07-19 20:38:30,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:38:30,095 INFO L225 Difference]: With dead ends: 4866 [2022-07-19 20:38:30,096 INFO L226 Difference]: Without dead ends: 1928 [2022-07-19 20:38:30,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-07-19 20:38:30,104 INFO L413 NwaCegarLoop]: 658 mSDtfsCounter, 698 mSDsluCounter, 1173 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 713 SdHoareTripleChecker+Valid, 1831 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 20:38:30,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [713 Valid, 1831 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 20:38:30,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1928 states. [2022-07-19 20:38:30,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1928 to 1813. [2022-07-19 20:38:30,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1813 states, 1468 states have (on average 1.3208446866485013) internal successors, (1939), 1489 states have internal predecessors, (1939), 190 states have call successors, (190), 121 states have call predecessors, (190), 153 states have return successors, (236), 204 states have call predecessors, (236), 186 states have call successors, (236) [2022-07-19 20:38:30,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1813 states to 1813 states and 2365 transitions. [2022-07-19 20:38:30,194 INFO L78 Accepts]: Start accepts. Automaton has 1813 states and 2365 transitions. Word has length 91 [2022-07-19 20:38:30,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:38:30,194 INFO L495 AbstractCegarLoop]: Abstraction has 1813 states and 2365 transitions. [2022-07-19 20:38:30,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-19 20:38:30,194 INFO L276 IsEmpty]: Start isEmpty. Operand 1813 states and 2365 transitions. [2022-07-19 20:38:30,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-07-19 20:38:30,196 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:38:30,196 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:38:30,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-19 20:38:30,196 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:38:30,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:38:30,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1161498813, now seen corresponding path program 1 times [2022-07-19 20:38:30,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:38:30,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124830110] [2022-07-19 20:38:30,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:38:30,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:38:30,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:30,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:38:30,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:30,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 20:38:30,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:30,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-19 20:38:30,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:30,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 20:38:30,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:30,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-19 20:38:30,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:30,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-19 20:38:30,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:30,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-19 20:38:30,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:30,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-07-19 20:38:30,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:30,267 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 20:38:30,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:38:30,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124830110] [2022-07-19 20:38:30,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124830110] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:38:30,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:38:30,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-19 20:38:30,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183865265] [2022-07-19 20:38:30,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:38:30,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 20:38:30,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:38:30,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 20:38:30,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-07-19 20:38:30,269 INFO L87 Difference]: Start difference. First operand 1813 states and 2365 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) [2022-07-19 20:38:31,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:38:31,395 INFO L93 Difference]: Finished difference Result 4231 states and 5448 transitions. [2022-07-19 20:38:31,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-19 20:38:31,396 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 92 [2022-07-19 20:38:31,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:38:31,404 INFO L225 Difference]: With dead ends: 4231 [2022-07-19 20:38:31,404 INFO L226 Difference]: Without dead ends: 2611 [2022-07-19 20:38:31,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=720, Unknown=0, NotChecked=0, Total=930 [2022-07-19 20:38:31,408 INFO L413 NwaCegarLoop]: 728 mSDtfsCounter, 2341 mSDsluCounter, 1733 mSDsCounter, 0 mSdLazyCounter, 1398 mSolverCounterSat, 484 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2382 SdHoareTripleChecker+Valid, 2461 SdHoareTripleChecker+Invalid, 1882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 484 IncrementalHoareTripleChecker+Valid, 1398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-19 20:38:31,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2382 Valid, 2461 Invalid, 1882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [484 Valid, 1398 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-19 20:38:31,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2611 states. [2022-07-19 20:38:31,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2611 to 2434. [2022-07-19 20:38:31,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2434 states, 1935 states have (on average 1.2821705426356589) internal successors, (2481), 1964 states have internal predecessors, (2481), 267 states have call successors, (267), 169 states have call predecessors, (267), 230 states have return successors, (367), 302 states have call predecessors, (367), 263 states have call successors, (367) [2022-07-19 20:38:31,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2434 states to 2434 states and 3115 transitions. [2022-07-19 20:38:31,478 INFO L78 Accepts]: Start accepts. Automaton has 2434 states and 3115 transitions. Word has length 92 [2022-07-19 20:38:31,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:38:31,478 INFO L495 AbstractCegarLoop]: Abstraction has 2434 states and 3115 transitions. [2022-07-19 20:38:31,479 INFO L496 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) [2022-07-19 20:38:31,479 INFO L276 IsEmpty]: Start isEmpty. Operand 2434 states and 3115 transitions. [2022-07-19 20:38:31,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-07-19 20:38:31,480 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:38:31,480 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:38:31,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-19 20:38:31,481 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:38:31,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:38:31,482 INFO L85 PathProgramCache]: Analyzing trace with hash 173734590, now seen corresponding path program 1 times [2022-07-19 20:38:31,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:38:31,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786204684] [2022-07-19 20:38:31,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:38:31,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:38:31,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:31,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:38:31,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:31,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 20:38:31,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:31,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-19 20:38:31,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:31,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 20:38:31,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:31,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-19 20:38:31,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:31,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-19 20:38:31,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:31,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-19 20:38:31,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:31,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-07-19 20:38:31,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:31,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-19 20:38:31,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:31,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-07-19 20:38:31,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:31,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-07-19 20:38:31,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:31,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 20:38:31,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:31,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-19 20:38:31,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:31,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-07-19 20:38:31,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:31,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-19 20:38:31,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:31,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-07-19 20:38:31,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:31,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2022-07-19 20:38:31,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:31,572 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 23 proven. 9 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-07-19 20:38:31,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:38:31,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786204684] [2022-07-19 20:38:31,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786204684] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 20:38:31,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426354365] [2022-07-19 20:38:31,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:38:31,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:38:31,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 20:38:31,600 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) [2022-07-19 20:38:31,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 20:38:31,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:31,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 612 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 20:38:31,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 20:38:31,938 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-07-19 20:38:31,938 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 20:38:31,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426354365] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:38:31,938 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 20:38:31,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 11 [2022-07-19 20:38:31,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380365968] [2022-07-19 20:38:31,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:38:31,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 20:38:31,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:38:31,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 20:38:31,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-07-19 20:38:31,940 INFO L87 Difference]: Start difference. First operand 2434 states and 3115 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-07-19 20:38:32,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:38:32,074 INFO L93 Difference]: Finished difference Result 6360 states and 7944 transitions. [2022-07-19 20:38:32,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 20:38:32,075 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 163 [2022-07-19 20:38:32,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:38:32,086 INFO L225 Difference]: With dead ends: 6360 [2022-07-19 20:38:32,086 INFO L226 Difference]: Without dead ends: 4346 [2022-07-19 20:38:32,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-07-19 20:38:32,090 INFO L413 NwaCegarLoop]: 682 mSDtfsCounter, 61 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 1331 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 20:38:32,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 1331 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 20:38:32,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4346 states. [2022-07-19 20:38:32,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4346 to 4304. [2022-07-19 20:38:32,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4304 states, 3392 states have (on average 1.2485259433962264) internal successors, (4235), 3444 states have internal predecessors, (4235), 474 states have call successors, (474), 330 states have call predecessors, (474), 436 states have return successors, (635), 531 states have call predecessors, (635), 470 states have call successors, (635) [2022-07-19 20:38:32,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4304 states to 4304 states and 5344 transitions. [2022-07-19 20:38:32,201 INFO L78 Accepts]: Start accepts. Automaton has 4304 states and 5344 transitions. Word has length 163 [2022-07-19 20:38:32,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:38:32,201 INFO L495 AbstractCegarLoop]: Abstraction has 4304 states and 5344 transitions. [2022-07-19 20:38:32,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-07-19 20:38:32,201 INFO L276 IsEmpty]: Start isEmpty. Operand 4304 states and 5344 transitions. [2022-07-19 20:38:32,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-07-19 20:38:32,203 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:38:32,203 INFO L195 NwaCegarLoop]: 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] [2022-07-19 20:38:32,221 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-19 20:38:32,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-19 20:38:32,420 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:38:32,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:38:32,420 INFO L85 PathProgramCache]: Analyzing trace with hash 2058139820, now seen corresponding path program 1 times [2022-07-19 20:38:32,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:38:32,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67080456] [2022-07-19 20:38:32,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:38:32,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:38:32,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:32,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:38:32,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:32,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 20:38:32,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:32,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-19 20:38:32,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:32,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-19 20:38:32,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:32,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-07-19 20:38:32,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:32,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:38:32,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:38:32,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67080456] [2022-07-19 20:38:32,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67080456] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:38:32,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:38:32,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 20:38:32,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063889768] [2022-07-19 20:38:32,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:38:32,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 20:38:32,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:38:32,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 20:38:32,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 20:38:32,534 INFO L87 Difference]: Start difference. First operand 4304 states and 5344 transitions. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 3 states have internal predecessors, (146), 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) [2022-07-19 20:38:33,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:38:33,699 INFO L93 Difference]: Finished difference Result 4751 states and 6066 transitions. [2022-07-19 20:38:33,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 20:38:33,700 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 3 states have internal predecessors, (146), 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 157 [2022-07-19 20:38:33,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:38:33,721 INFO L225 Difference]: With dead ends: 4751 [2022-07-19 20:38:33,721 INFO L226 Difference]: Without dead ends: 4424 [2022-07-19 20:38:33,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-19 20:38:33,724 INFO L413 NwaCegarLoop]: 719 mSDtfsCounter, 1003 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1025 SdHoareTripleChecker+Valid, 1268 SdHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-19 20:38:33,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1025 Valid, 1268 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 714 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-19 20:38:33,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4424 states. [2022-07-19 20:38:33,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4424 to 4304. [2022-07-19 20:38:33,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4304 states, 3392 states have (on average 1.2482311320754718) internal successors, (4234), 3444 states have internal predecessors, (4234), 474 states have call successors, (474), 330 states have call predecessors, (474), 436 states have return successors, (635), 531 states have call predecessors, (635), 470 states have call successors, (635) [2022-07-19 20:38:33,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4304 states to 4304 states and 5343 transitions. [2022-07-19 20:38:33,957 INFO L78 Accepts]: Start accepts. Automaton has 4304 states and 5343 transitions. Word has length 157 [2022-07-19 20:38:33,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:38:33,957 INFO L495 AbstractCegarLoop]: Abstraction has 4304 states and 5343 transitions. [2022-07-19 20:38:33,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 3 states have internal predecessors, (146), 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) [2022-07-19 20:38:33,958 INFO L276 IsEmpty]: Start isEmpty. Operand 4304 states and 5343 transitions. [2022-07-19 20:38:33,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-07-19 20:38:33,960 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:38:33,960 INFO L195 NwaCegarLoop]: 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] [2022-07-19 20:38:33,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-19 20:38:33,960 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:38:33,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:38:33,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1972179986, now seen corresponding path program 1 times [2022-07-19 20:38:33,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:38:33,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641433600] [2022-07-19 20:38:33,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:38:33,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:38:33,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:33,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:38:33,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:34,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 20:38:34,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:34,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-19 20:38:34,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:34,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-19 20:38:34,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:34,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-07-19 20:38:34,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:34,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:38:34,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:38:34,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641433600] [2022-07-19 20:38:34,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641433600] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:38:34,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:38:34,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 20:38:34,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421211664] [2022-07-19 20:38:34,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:38:34,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 20:38:34,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:38:34,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 20:38:34,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 20:38:34,053 INFO L87 Difference]: Start difference. First operand 4304 states and 5343 transitions. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 3 states have internal predecessors, (146), 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) [2022-07-19 20:38:35,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:38:35,260 INFO L93 Difference]: Finished difference Result 4743 states and 6049 transitions. [2022-07-19 20:38:35,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 20:38:35,260 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 3 states have internal predecessors, (146), 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 157 [2022-07-19 20:38:35,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:38:35,272 INFO L225 Difference]: With dead ends: 4743 [2022-07-19 20:38:35,273 INFO L226 Difference]: Without dead ends: 4424 [2022-07-19 20:38:35,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-19 20:38:35,276 INFO L413 NwaCegarLoop]: 718 mSDtfsCounter, 994 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1016 SdHoareTripleChecker+Valid, 1266 SdHoareTripleChecker+Invalid, 809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-19 20:38:35,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1016 Valid, 1266 Invalid, 809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 713 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-19 20:38:35,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4424 states. [2022-07-19 20:38:35,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4424 to 4304. [2022-07-19 20:38:35,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4304 states, 3392 states have (on average 1.247936320754717) internal successors, (4233), 3444 states have internal predecessors, (4233), 474 states have call successors, (474), 330 states have call predecessors, (474), 436 states have return successors, (635), 531 states have call predecessors, (635), 470 states have call successors, (635) [2022-07-19 20:38:35,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4304 states to 4304 states and 5342 transitions. [2022-07-19 20:38:35,485 INFO L78 Accepts]: Start accepts. Automaton has 4304 states and 5342 transitions. Word has length 157 [2022-07-19 20:38:35,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:38:35,486 INFO L495 AbstractCegarLoop]: Abstraction has 4304 states and 5342 transitions. [2022-07-19 20:38:35,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 3 states have internal predecessors, (146), 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) [2022-07-19 20:38:35,486 INFO L276 IsEmpty]: Start isEmpty. Operand 4304 states and 5342 transitions. [2022-07-19 20:38:35,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-07-19 20:38:35,487 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:38:35,487 INFO L195 NwaCegarLoop]: 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] [2022-07-19 20:38:35,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-19 20:38:35,488 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:38:35,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:38:35,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1912176944, now seen corresponding path program 1 times [2022-07-19 20:38:35,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:38:35,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942955252] [2022-07-19 20:38:35,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:38:35,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:38:35,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:35,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:38:35,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:35,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 20:38:35,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:35,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-19 20:38:35,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:35,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-19 20:38:35,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:35,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-07-19 20:38:35,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:35,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:38:35,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:38:35,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942955252] [2022-07-19 20:38:35,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942955252] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:38:35,590 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:38:35,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 20:38:35,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308835802] [2022-07-19 20:38:35,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:38:35,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 20:38:35,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:38:35,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 20:38:35,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-19 20:38:35,592 INFO L87 Difference]: Start difference. First operand 4304 states and 5342 transitions. Second operand has 6 states, 6 states have (on average 24.333333333333332) internal successors, (146), 4 states have internal predecessors, (146), 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) [2022-07-19 20:38:37,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:38:37,635 INFO L93 Difference]: Finished difference Result 5190 states and 6773 transitions. [2022-07-19 20:38:37,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 20:38:37,635 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.333333333333332) internal successors, (146), 4 states have internal predecessors, (146), 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 157 [2022-07-19 20:38:37,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:38:37,646 INFO L225 Difference]: With dead ends: 5190 [2022-07-19 20:38:37,646 INFO L226 Difference]: Without dead ends: 4874 [2022-07-19 20:38:37,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-07-19 20:38:37,648 INFO L413 NwaCegarLoop]: 748 mSDtfsCounter, 1579 mSDsluCounter, 1034 mSDsCounter, 0 mSdLazyCounter, 1844 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1608 SdHoareTripleChecker+Valid, 1782 SdHoareTripleChecker+Invalid, 2003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 1844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-19 20:38:37,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1608 Valid, 1782 Invalid, 2003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 1844 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-19 20:38:37,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4874 states. [2022-07-19 20:38:37,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4874 to 4633. [2022-07-19 20:38:37,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4633 states, 3695 states have (on average 1.2765899864682002) internal successors, (4717), 3748 states have internal predecessors, (4717), 493 states have call successors, (493), 336 states have call predecessors, (493), 443 states have return successors, (657), 550 states have call predecessors, (657), 489 states have call successors, (657) [2022-07-19 20:38:37,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4633 states to 4633 states and 5867 transitions. [2022-07-19 20:38:37,882 INFO L78 Accepts]: Start accepts. Automaton has 4633 states and 5867 transitions. Word has length 157 [2022-07-19 20:38:37,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:38:37,883 INFO L495 AbstractCegarLoop]: Abstraction has 4633 states and 5867 transitions. [2022-07-19 20:38:37,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.333333333333332) internal successors, (146), 4 states have internal predecessors, (146), 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) [2022-07-19 20:38:37,883 INFO L276 IsEmpty]: Start isEmpty. Operand 4633 states and 5867 transitions. [2022-07-19 20:38:37,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-07-19 20:38:37,885 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:38:37,885 INFO L195 NwaCegarLoop]: 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] [2022-07-19 20:38:37,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-19 20:38:37,885 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:38:37,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:38:37,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1716755156, now seen corresponding path program 1 times [2022-07-19 20:38:37,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:38:37,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272592000] [2022-07-19 20:38:37,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:38:37,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:38:37,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:37,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:38:37,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:37,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 20:38:37,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:37,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-19 20:38:37,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:37,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-19 20:38:37,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:37,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-07-19 20:38:37,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:37,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:38:37,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:38:37,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272592000] [2022-07-19 20:38:37,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272592000] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:38:37,991 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:38:37,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 20:38:37,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196072500] [2022-07-19 20:38:37,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:38:37,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 20:38:37,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:38:37,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 20:38:37,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 20:38:37,994 INFO L87 Difference]: Start difference. First operand 4633 states and 5867 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2022-07-19 20:38:40,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:38:40,497 INFO L93 Difference]: Finished difference Result 5983 states and 8049 transitions. [2022-07-19 20:38:40,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 20:38:40,498 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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 157 [2022-07-19 20:38:40,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:38:40,511 INFO L225 Difference]: With dead ends: 5983 [2022-07-19 20:38:40,511 INFO L226 Difference]: Without dead ends: 5338 [2022-07-19 20:38:40,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-19 20:38:40,514 INFO L413 NwaCegarLoop]: 807 mSDtfsCounter, 1687 mSDsluCounter, 1394 mSDsCounter, 0 mSdLazyCounter, 2608 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1716 SdHoareTripleChecker+Valid, 2201 SdHoareTripleChecker+Invalid, 2756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 2608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-19 20:38:40,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1716 Valid, 2201 Invalid, 2756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 2608 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-19 20:38:40,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5338 states. [2022-07-19 20:38:40,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5338 to 4939. [2022-07-19 20:38:40,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4939 states, 3975 states have (on average 1.2968553459119496) internal successors, (5155), 4029 states have internal predecessors, (5155), 512 states have call successors, (512), 342 states have call predecessors, (512), 450 states have return successors, (678), 570 states have call predecessors, (678), 508 states have call successors, (678) [2022-07-19 20:38:40,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4939 states to 4939 states and 6345 transitions. [2022-07-19 20:38:40,706 INFO L78 Accepts]: Start accepts. Automaton has 4939 states and 6345 transitions. Word has length 157 [2022-07-19 20:38:40,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:38:40,706 INFO L495 AbstractCegarLoop]: Abstraction has 4939 states and 6345 transitions. [2022-07-19 20:38:40,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2022-07-19 20:38:40,707 INFO L276 IsEmpty]: Start isEmpty. Operand 4939 states and 6345 transitions. [2022-07-19 20:38:40,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-07-19 20:38:40,708 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:38:40,709 INFO L195 NwaCegarLoop]: 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] [2022-07-19 20:38:40,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-19 20:38:40,709 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:38:40,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:38:40,709 INFO L85 PathProgramCache]: Analyzing trace with hash -317801554, now seen corresponding path program 1 times [2022-07-19 20:38:40,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:38:40,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948420769] [2022-07-19 20:38:40,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:38:40,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:38:40,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:40,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:38:40,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:40,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 20:38:40,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:40,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-19 20:38:40,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:40,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-19 20:38:40,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:40,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-07-19 20:38:40,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:40,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:38:40,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:38:40,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948420769] [2022-07-19 20:38:40,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948420769] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:38:40,795 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:38:40,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 20:38:40,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322725656] [2022-07-19 20:38:40,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:38:40,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 20:38:40,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:38:40,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 20:38:40,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 20:38:40,797 INFO L87 Difference]: Start difference. First operand 4939 states and 6345 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2022-07-19 20:38:43,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:38:43,409 INFO L93 Difference]: Finished difference Result 7152 states and 9915 transitions. [2022-07-19 20:38:43,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 20:38:43,410 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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 157 [2022-07-19 20:38:43,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:38:43,421 INFO L225 Difference]: With dead ends: 7152 [2022-07-19 20:38:43,421 INFO L226 Difference]: Without dead ends: 6201 [2022-07-19 20:38:43,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-19 20:38:43,424 INFO L413 NwaCegarLoop]: 1009 mSDtfsCounter, 1600 mSDsluCounter, 1936 mSDsCounter, 0 mSdLazyCounter, 2879 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1629 SdHoareTripleChecker+Valid, 2945 SdHoareTripleChecker+Invalid, 3003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 2879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-19 20:38:43,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1629 Valid, 2945 Invalid, 3003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 2879 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-19 20:38:43,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6201 states. [2022-07-19 20:38:43,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6201 to 5552. [2022-07-19 20:38:43,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5552 states, 4536 states have (on average 1.3298059964726632) internal successors, (6032), 4592 states have internal predecessors, (6032), 550 states have call successors, (550), 354 states have call predecessors, (550), 464 states have return successors, (724), 610 states have call predecessors, (724), 546 states have call successors, (724) [2022-07-19 20:38:43,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5552 states to 5552 states and 7306 transitions. [2022-07-19 20:38:43,657 INFO L78 Accepts]: Start accepts. Automaton has 5552 states and 7306 transitions. Word has length 157 [2022-07-19 20:38:43,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:38:43,657 INFO L495 AbstractCegarLoop]: Abstraction has 5552 states and 7306 transitions. [2022-07-19 20:38:43,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2022-07-19 20:38:43,658 INFO L276 IsEmpty]: Start isEmpty. Operand 5552 states and 7306 transitions. [2022-07-19 20:38:43,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-07-19 20:38:43,660 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:38:43,660 INFO L195 NwaCegarLoop]: 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] [2022-07-19 20:38:43,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-19 20:38:43,661 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:38:43,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:38:43,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1935242004, now seen corresponding path program 1 times [2022-07-19 20:38:43,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:38:43,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040617754] [2022-07-19 20:38:43,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:38:43,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:38:43,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:43,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:38:43,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:43,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 20:38:43,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:43,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-19 20:38:43,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:43,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-19 20:38:43,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:43,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-07-19 20:38:43,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:43,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:38:43,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:38:43,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040617754] [2022-07-19 20:38:43,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040617754] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:38:43,758 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:38:43,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 20:38:43,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959128521] [2022-07-19 20:38:43,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:38:43,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 20:38:43,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:38:43,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 20:38:43,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-19 20:38:43,759 INFO L87 Difference]: Start difference. First operand 5552 states and 7306 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2022-07-19 20:38:45,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:38:45,265 INFO L93 Difference]: Finished difference Result 7753 states and 10867 transitions. [2022-07-19 20:38:45,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 20:38:45,265 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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 157 [2022-07-19 20:38:45,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:38:45,277 INFO L225 Difference]: With dead ends: 7753 [2022-07-19 20:38:45,278 INFO L226 Difference]: Without dead ends: 6189 [2022-07-19 20:38:45,282 INFO L412 NwaCegarLoop]: 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 [2022-07-19 20:38:45,282 INFO L413 NwaCegarLoop]: 688 mSDtfsCounter, 1208 mSDsluCounter, 1076 mSDsCounter, 0 mSdLazyCounter, 1418 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1238 SdHoareTripleChecker+Valid, 1764 SdHoareTripleChecker+Invalid, 1546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 1418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-19 20:38:45,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1238 Valid, 1764 Invalid, 1546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 1418 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-19 20:38:45,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6189 states. [2022-07-19 20:38:45,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6189 to 5552. [2022-07-19 20:38:45,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5552 states, 4536 states have (on average 1.3287037037037037) internal successors, (6027), 4592 states have internal predecessors, (6027), 550 states have call successors, (550), 354 states have call predecessors, (550), 464 states have return successors, (724), 610 states have call predecessors, (724), 546 states have call successors, (724) [2022-07-19 20:38:45,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5552 states to 5552 states and 7301 transitions. [2022-07-19 20:38:45,570 INFO L78 Accepts]: Start accepts. Automaton has 5552 states and 7301 transitions. Word has length 157 [2022-07-19 20:38:45,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:38:45,570 INFO L495 AbstractCegarLoop]: Abstraction has 5552 states and 7301 transitions. [2022-07-19 20:38:45,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2022-07-19 20:38:45,570 INFO L276 IsEmpty]: Start isEmpty. Operand 5552 states and 7301 transitions. [2022-07-19 20:38:45,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-07-19 20:38:45,572 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:38:45,572 INFO L195 NwaCegarLoop]: 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] [2022-07-19 20:38:45,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-19 20:38:45,573 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:38:45,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:38:45,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1571775506, now seen corresponding path program 1 times [2022-07-19 20:38:45,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:38:45,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7083908] [2022-07-19 20:38:45,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:38:45,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:38:45,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:45,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:38:45,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:45,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 20:38:45,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:45,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-19 20:38:45,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:45,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-19 20:38:45,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:45,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-07-19 20:38:45,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:45,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:38:45,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:38:45,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7083908] [2022-07-19 20:38:45,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7083908] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:38:45,655 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:38:45,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 20:38:45,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286261402] [2022-07-19 20:38:45,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:38:45,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 20:38:45,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:38:45,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 20:38:45,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-19 20:38:45,657 INFO L87 Difference]: Start difference. First operand 5552 states and 7301 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2022-07-19 20:38:47,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:38:47,012 INFO L93 Difference]: Finished difference Result 7747 states and 10841 transitions. [2022-07-19 20:38:47,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 20:38:47,012 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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 157 [2022-07-19 20:38:47,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:38:47,032 INFO L225 Difference]: With dead ends: 7747 [2022-07-19 20:38:47,033 INFO L226 Difference]: Without dead ends: 6183 [2022-07-19 20:38:47,038 INFO L412 NwaCegarLoop]: 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 [2022-07-19 20:38:47,039 INFO L413 NwaCegarLoop]: 684 mSDtfsCounter, 1405 mSDsluCounter, 840 mSDsCounter, 0 mSdLazyCounter, 1248 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1435 SdHoareTripleChecker+Valid, 1524 SdHoareTripleChecker+Invalid, 1420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 1248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-19 20:38:47,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1435 Valid, 1524 Invalid, 1420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 1248 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-19 20:38:47,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6183 states. [2022-07-19 20:38:47,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6183 to 5552. [2022-07-19 20:38:47,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5552 states, 4536 states have (on average 1.3276014109347443) internal successors, (6022), 4592 states have internal predecessors, (6022), 550 states have call successors, (550), 354 states have call predecessors, (550), 464 states have return successors, (724), 610 states have call predecessors, (724), 546 states have call successors, (724) [2022-07-19 20:38:47,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5552 states to 5552 states and 7296 transitions. [2022-07-19 20:38:47,306 INFO L78 Accepts]: Start accepts. Automaton has 5552 states and 7296 transitions. Word has length 157 [2022-07-19 20:38:47,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:38:47,306 INFO L495 AbstractCegarLoop]: Abstraction has 5552 states and 7296 transitions. [2022-07-19 20:38:47,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2022-07-19 20:38:47,306 INFO L276 IsEmpty]: Start isEmpty. Operand 5552 states and 7296 transitions. [2022-07-19 20:38:47,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-07-19 20:38:47,308 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:38:47,309 INFO L195 NwaCegarLoop]: 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] [2022-07-19 20:38:47,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-19 20:38:47,309 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:38:47,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:38:47,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1282956116, now seen corresponding path program 1 times [2022-07-19 20:38:47,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:38:47,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856955584] [2022-07-19 20:38:47,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:38:47,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:38:47,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:47,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:38:47,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:47,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 20:38:47,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:47,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-19 20:38:47,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:47,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-19 20:38:47,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:47,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-07-19 20:38:47,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:47,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:38:47,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:38:47,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856955584] [2022-07-19 20:38:47,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856955584] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:38:47,429 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:38:47,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 20:38:47,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808857811] [2022-07-19 20:38:47,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:38:47,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 20:38:47,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:38:47,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 20:38:47,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 20:38:47,431 INFO L87 Difference]: Start difference. First operand 5552 states and 7296 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2022-07-19 20:38:49,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:38:49,966 INFO L93 Difference]: Finished difference Result 9386 states and 13410 transitions. [2022-07-19 20:38:49,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 20:38:49,967 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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 157 [2022-07-19 20:38:49,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:38:49,986 INFO L225 Difference]: With dead ends: 9386 [2022-07-19 20:38:49,986 INFO L226 Difference]: Without dead ends: 7822 [2022-07-19 20:38:49,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-19 20:38:49,992 INFO L413 NwaCegarLoop]: 989 mSDtfsCounter, 1579 mSDsluCounter, 1936 mSDsCounter, 0 mSdLazyCounter, 2843 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1608 SdHoareTripleChecker+Valid, 2925 SdHoareTripleChecker+Invalid, 2970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 2843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-19 20:38:49,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1608 Valid, 2925 Invalid, 2970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 2843 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-19 20:38:49,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7822 states. [2022-07-19 20:38:50,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7822 to 6787. [2022-07-19 20:38:50,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6787 states, 5667 states have (on average 1.3725074995588495) internal successors, (7778), 5727 states have internal predecessors, (7778), 626 states have call successors, (626), 378 states have call predecessors, (626), 492 states have return successors, (822), 690 states have call predecessors, (822), 622 states have call successors, (822) [2022-07-19 20:38:50,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6787 states to 6787 states and 9226 transitions. [2022-07-19 20:38:50,366 INFO L78 Accepts]: Start accepts. Automaton has 6787 states and 9226 transitions. Word has length 157 [2022-07-19 20:38:50,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:38:50,367 INFO L495 AbstractCegarLoop]: Abstraction has 6787 states and 9226 transitions. [2022-07-19 20:38:50,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2022-07-19 20:38:50,367 INFO L276 IsEmpty]: Start isEmpty. Operand 6787 states and 9226 transitions. [2022-07-19 20:38:50,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-07-19 20:38:50,370 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:38:50,370 INFO L195 NwaCegarLoop]: 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] [2022-07-19 20:38:50,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-19 20:38:50,371 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:38:50,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:38:50,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1827828690, now seen corresponding path program 1 times [2022-07-19 20:38:50,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:38:50,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192438252] [2022-07-19 20:38:50,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:38:50,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:38:50,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:50,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:38:50,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:50,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 20:38:50,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:50,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-19 20:38:50,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:50,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-19 20:38:50,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:50,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-07-19 20:38:50,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:50,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:38:50,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:38:50,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192438252] [2022-07-19 20:38:50,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192438252] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:38:50,487 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:38:50,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 20:38:50,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36343895] [2022-07-19 20:38:50,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:38:50,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 20:38:50,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:38:50,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 20:38:50,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 20:38:50,488 INFO L87 Difference]: Start difference. First operand 6787 states and 9226 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2022-07-19 20:38:52,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:38:52,844 INFO L93 Difference]: Finished difference Result 13873 states and 20504 transitions. [2022-07-19 20:38:52,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 20:38:52,845 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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 157 [2022-07-19 20:38:52,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:38:52,872 INFO L225 Difference]: With dead ends: 13873 [2022-07-19 20:38:52,872 INFO L226 Difference]: Without dead ends: 11074 [2022-07-19 20:38:52,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-19 20:38:52,882 INFO L413 NwaCegarLoop]: 981 mSDtfsCounter, 1574 mSDsluCounter, 1936 mSDsCounter, 0 mSdLazyCounter, 2823 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1603 SdHoareTripleChecker+Valid, 2917 SdHoareTripleChecker+Invalid, 2951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 2823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-19 20:38:52,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1603 Valid, 2917 Invalid, 2951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 2823 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-19 20:38:52,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11074 states. [2022-07-19 20:38:53,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11074 to 9268. [2022-07-19 20:38:53,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9268 states, 7940 states have (on average 1.4241813602015114) internal successors, (11308), 8008 states have internal predecessors, (11308), 778 states have call successors, (778), 426 states have call predecessors, (778), 548 states have return successors, (1036), 850 states have call predecessors, (1036), 774 states have call successors, (1036) [2022-07-19 20:38:53,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9268 states to 9268 states and 13122 transitions. [2022-07-19 20:38:53,423 INFO L78 Accepts]: Start accepts. Automaton has 9268 states and 13122 transitions. Word has length 157 [2022-07-19 20:38:53,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:38:53,423 INFO L495 AbstractCegarLoop]: Abstraction has 9268 states and 13122 transitions. [2022-07-19 20:38:53,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2022-07-19 20:38:53,424 INFO L276 IsEmpty]: Start isEmpty. Operand 9268 states and 13122 transitions. [2022-07-19 20:38:53,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-07-19 20:38:53,428 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:38:53,429 INFO L195 NwaCegarLoop]: 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] [2022-07-19 20:38:53,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-19 20:38:53,429 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:38:53,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:38:53,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1519086640, now seen corresponding path program 1 times [2022-07-19 20:38:53,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:38:53,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198100914] [2022-07-19 20:38:53,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:38:53,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:38:53,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:53,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:38:53,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:53,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 20:38:53,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:53,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-19 20:38:53,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:53,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-19 20:38:53,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:53,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-07-19 20:38:53,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:53,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:38:53,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:38:53,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198100914] [2022-07-19 20:38:53,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198100914] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:38:53,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:38:53,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 20:38:53,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525211651] [2022-07-19 20:38:53,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:38:53,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 20:38:53,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:38:53,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 20:38:53,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-19 20:38:53,538 INFO L87 Difference]: Start difference. First operand 9268 states and 13122 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2022-07-19 20:38:55,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:38:55,438 INFO L93 Difference]: Finished difference Result 16422 states and 24605 transitions. [2022-07-19 20:38:55,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 20:38:55,439 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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 157 [2022-07-19 20:38:55,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:38:55,501 INFO L225 Difference]: With dead ends: 16422 [2022-07-19 20:38:55,501 INFO L226 Difference]: Without dead ends: 11142 [2022-07-19 20:38:55,514 INFO L412 NwaCegarLoop]: 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 [2022-07-19 20:38:55,525 INFO L413 NwaCegarLoop]: 670 mSDtfsCounter, 1207 mSDsluCounter, 1076 mSDsCounter, 0 mSdLazyCounter, 1371 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1237 SdHoareTripleChecker+Valid, 1746 SdHoareTripleChecker+Invalid, 1502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 1371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-19 20:38:55,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1237 Valid, 1746 Invalid, 1502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 1371 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-19 20:38:55,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11142 states. [2022-07-19 20:38:56,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11142 to 9268. [2022-07-19 20:38:56,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9268 states, 7940 states have (on average 1.4220403022670025) internal successors, (11291), 8008 states have internal predecessors, (11291), 778 states have call successors, (778), 426 states have call predecessors, (778), 548 states have return successors, (1036), 850 states have call predecessors, (1036), 774 states have call successors, (1036) [2022-07-19 20:38:56,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9268 states to 9268 states and 13105 transitions. [2022-07-19 20:38:56,152 INFO L78 Accepts]: Start accepts. Automaton has 9268 states and 13105 transitions. Word has length 157 [2022-07-19 20:38:56,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:38:56,152 INFO L495 AbstractCegarLoop]: Abstraction has 9268 states and 13105 transitions. [2022-07-19 20:38:56,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2022-07-19 20:38:56,153 INFO L276 IsEmpty]: Start isEmpty. Operand 9268 states and 13105 transitions. [2022-07-19 20:38:56,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-07-19 20:38:56,156 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:38:56,156 INFO L195 NwaCegarLoop]: 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] [2022-07-19 20:38:56,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-19 20:38:56,156 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:38:56,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:38:56,157 INFO L85 PathProgramCache]: Analyzing trace with hash 934314990, now seen corresponding path program 1 times [2022-07-19 20:38:56,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:38:56,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425177502] [2022-07-19 20:38:56,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:38:56,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:38:56,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:56,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:38:56,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:56,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 20:38:56,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:56,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-19 20:38:56,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:56,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-19 20:38:56,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:56,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-07-19 20:38:56,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:38:56,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:38:56,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:38:56,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425177502] [2022-07-19 20:38:56,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425177502] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:38:56,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:38:56,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 20:38:56,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487553126] [2022-07-19 20:38:56,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:38:56,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 20:38:56,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:38:56,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 20:38:56,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 20:38:56,244 INFO L87 Difference]: Start difference. First operand 9268 states and 13105 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2022-07-19 20:38:59,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:38:59,326 INFO L93 Difference]: Finished difference Result 22844 states and 34658 transitions. [2022-07-19 20:38:59,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 20:38:59,326 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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 157 [2022-07-19 20:38:59,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:38:59,359 INFO L225 Difference]: With dead ends: 22844 [2022-07-19 20:38:59,360 INFO L226 Difference]: Without dead ends: 17564 [2022-07-19 20:38:59,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-19 20:38:59,372 INFO L413 NwaCegarLoop]: 758 mSDtfsCounter, 1656 mSDsluCounter, 1354 mSDsCounter, 0 mSdLazyCounter, 2519 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1685 SdHoareTripleChecker+Valid, 2112 SdHoareTripleChecker+Invalid, 2685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 2519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-19 20:38:59,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1685 Valid, 2112 Invalid, 2685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 2519 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-19 20:38:59,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17564 states. [2022-07-19 20:39:00,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17564 to 14260. [2022-07-19 20:39:00,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14260 states, 12516 states have (on average 1.4678012144455097) internal successors, (18371), 12600 states have internal predecessors, (18371), 1082 states have call successors, (1082), 522 states have call predecessors, (1082), 660 states have return successors, (1518), 1170 states have call predecessors, (1518), 1078 states have call successors, (1518) [2022-07-19 20:39:00,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14260 states to 14260 states and 20971 transitions. [2022-07-19 20:39:00,278 INFO L78 Accepts]: Start accepts. Automaton has 14260 states and 20971 transitions. Word has length 157 [2022-07-19 20:39:00,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:39:00,278 INFO L495 AbstractCegarLoop]: Abstraction has 14260 states and 20971 transitions. [2022-07-19 20:39:00,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2022-07-19 20:39:00,278 INFO L276 IsEmpty]: Start isEmpty. Operand 14260 states and 20971 transitions. [2022-07-19 20:39:00,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-07-19 20:39:00,284 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:39:00,284 INFO L195 NwaCegarLoop]: 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] [2022-07-19 20:39:00,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-19 20:39:00,284 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:39:00,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:39:00,284 INFO L85 PathProgramCache]: Analyzing trace with hash 499809392, now seen corresponding path program 1 times [2022-07-19 20:39:00,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:39:00,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590798029] [2022-07-19 20:39:00,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:39:00,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:39:00,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:39:00,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:39:00,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:39:00,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 20:39:00,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:39:00,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-19 20:39:00,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:39:00,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-19 20:39:00,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:39:00,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-07-19 20:39:00,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:39:00,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:39:00,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:39:00,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590798029] [2022-07-19 20:39:00,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590798029] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:39:00,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:39:00,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 20:39:00,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625916922] [2022-07-19 20:39:00,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:39:00,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 20:39:00,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:39:00,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 20:39:00,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-19 20:39:00,370 INFO L87 Difference]: Start difference. First operand 14260 states and 20971 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2022-07-19 20:39:02,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:39:02,562 INFO L93 Difference]: Finished difference Result 27986 states and 43032 transitions. [2022-07-19 20:39:02,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 20:39:02,563 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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 157 [2022-07-19 20:39:02,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:39:02,599 INFO L225 Difference]: With dead ends: 27986 [2022-07-19 20:39:02,600 INFO L226 Difference]: Without dead ends: 17714 [2022-07-19 20:39:02,616 INFO L412 NwaCegarLoop]: 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 [2022-07-19 20:39:02,616 INFO L413 NwaCegarLoop]: 663 mSDtfsCounter, 1405 mSDsluCounter, 840 mSDsCounter, 0 mSdLazyCounter, 1206 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1435 SdHoareTripleChecker+Valid, 1503 SdHoareTripleChecker+Invalid, 1381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 1206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-19 20:39:02,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1435 Valid, 1503 Invalid, 1381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 1206 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-19 20:39:02,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17714 states. [2022-07-19 20:39:03,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17714 to 14260. [2022-07-19 20:39:03,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14260 states, 12516 states have (on average 1.465164589325663) internal successors, (18338), 12600 states have internal predecessors, (18338), 1082 states have call successors, (1082), 522 states have call predecessors, (1082), 660 states have return successors, (1518), 1170 states have call predecessors, (1518), 1078 states have call successors, (1518) [2022-07-19 20:39:03,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14260 states to 14260 states and 20938 transitions. [2022-07-19 20:39:03,518 INFO L78 Accepts]: Start accepts. Automaton has 14260 states and 20938 transitions. Word has length 157 [2022-07-19 20:39:03,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:39:03,519 INFO L495 AbstractCegarLoop]: Abstraction has 14260 states and 20938 transitions. [2022-07-19 20:39:03,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2022-07-19 20:39:03,519 INFO L276 IsEmpty]: Start isEmpty. Operand 14260 states and 20938 transitions. [2022-07-19 20:39:03,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-07-19 20:39:03,524 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:39:03,524 INFO L195 NwaCegarLoop]: 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] [2022-07-19 20:39:03,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-19 20:39:03,524 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:39:03,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:39:03,525 INFO L85 PathProgramCache]: Analyzing trace with hash 70151086, now seen corresponding path program 1 times [2022-07-19 20:39:03,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:39:03,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750274833] [2022-07-19 20:39:03,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:39:03,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:39:03,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:39:03,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:39:03,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:39:03,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 20:39:03,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:39:03,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-19 20:39:03,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:39:03,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-19 20:39:03,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:39:03,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-07-19 20:39:03,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:39:03,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:39:03,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:39:03,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750274833] [2022-07-19 20:39:03,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750274833] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:39:03,637 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:39:03,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 20:39:03,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779404383] [2022-07-19 20:39:03,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:39:03,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 20:39:03,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:39:03,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 20:39:03,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-19 20:39:03,638 INFO L87 Difference]: Start difference. First operand 14260 states and 20938 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2022-07-19 20:39:06,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:39:06,180 INFO L93 Difference]: Finished difference Result 27952 states and 42865 transitions. [2022-07-19 20:39:06,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 20:39:06,181 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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 157 [2022-07-19 20:39:06,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:39:06,250 INFO L225 Difference]: With dead ends: 27952 [2022-07-19 20:39:06,250 INFO L226 Difference]: Without dead ends: 17680 [2022-07-19 20:39:06,273 INFO L412 NwaCegarLoop]: 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 [2022-07-19 20:39:06,273 INFO L413 NwaCegarLoop]: 659 mSDtfsCounter, 1202 mSDsluCounter, 1074 mSDsCounter, 0 mSdLazyCounter, 1342 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1232 SdHoareTripleChecker+Valid, 1733 SdHoareTripleChecker+Invalid, 1475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-19 20:39:06,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1232 Valid, 1733 Invalid, 1475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 1342 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-19 20:39:06,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17680 states. [2022-07-19 20:39:07,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17680 to 14260. [2022-07-19 20:39:07,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14260 states, 12516 states have (on average 1.4625279642058167) internal successors, (18305), 12600 states have internal predecessors, (18305), 1082 states have call successors, (1082), 522 states have call predecessors, (1082), 660 states have return successors, (1518), 1170 states have call predecessors, (1518), 1078 states have call successors, (1518) [2022-07-19 20:39:07,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14260 states to 14260 states and 20905 transitions. [2022-07-19 20:39:07,254 INFO L78 Accepts]: Start accepts. Automaton has 14260 states and 20905 transitions. Word has length 157 [2022-07-19 20:39:07,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:39:07,254 INFO L495 AbstractCegarLoop]: Abstraction has 14260 states and 20905 transitions. [2022-07-19 20:39:07,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2022-07-19 20:39:07,254 INFO L276 IsEmpty]: Start isEmpty. Operand 14260 states and 20905 transitions. [2022-07-19 20:39:07,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-07-19 20:39:07,260 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:39:07,260 INFO L195 NwaCegarLoop]: 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] [2022-07-19 20:39:07,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-19 20:39:07,261 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:39:07,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:39:07,261 INFO L85 PathProgramCache]: Analyzing trace with hash -636445520, now seen corresponding path program 1 times [2022-07-19 20:39:07,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:39:07,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882855044] [2022-07-19 20:39:07,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:39:07,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:39:07,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:39:07,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:39:07,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:39:07,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 20:39:07,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:39:07,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-19 20:39:07,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:39:07,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-19 20:39:07,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:39:07,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-07-19 20:39:07,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:39:07,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:39:07,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:39:07,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882855044] [2022-07-19 20:39:07,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882855044] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:39:07,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:39:07,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 20:39:07,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065853429] [2022-07-19 20:39:07,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:39:07,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 20:39:07,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:39:07,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 20:39:07,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 20:39:07,389 INFO L87 Difference]: Start difference. First operand 14260 states and 20905 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2022-07-19 20:39:12,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:39:12,890 INFO L93 Difference]: Finished difference Result 45138 states and 69592 transitions. [2022-07-19 20:39:12,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-19 20:39:12,891 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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 157 [2022-07-19 20:39:12,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:39:12,976 INFO L225 Difference]: With dead ends: 45138 [2022-07-19 20:39:12,976 INFO L226 Difference]: Without dead ends: 34866 [2022-07-19 20:39:13,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-07-19 20:39:13,003 INFO L413 NwaCegarLoop]: 950 mSDtfsCounter, 1919 mSDsluCounter, 1925 mSDsCounter, 0 mSdLazyCounter, 2742 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1959 SdHoareTripleChecker+Valid, 2875 SdHoareTripleChecker+Invalid, 2875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 2742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-19 20:39:13,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1959 Valid, 2875 Invalid, 2875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 2742 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-19 20:39:13,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34866 states. [2022-07-19 20:39:14,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34866 to 23923. [2022-07-19 20:39:14,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23923 states, 21379 states have (on average 1.4907619626736517) internal successors, (31871), 21495 states have internal predecessors, (31871), 1658 states have call successors, (1658), 714 states have call predecessors, (1658), 884 states have return successors, (2612), 1778 states have call predecessors, (2612), 1654 states have call successors, (2612) [2022-07-19 20:39:14,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23923 states to 23923 states and 36141 transitions. [2022-07-19 20:39:14,811 INFO L78 Accepts]: Start accepts. Automaton has 23923 states and 36141 transitions. Word has length 157 [2022-07-19 20:39:14,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:39:14,811 INFO L495 AbstractCegarLoop]: Abstraction has 23923 states and 36141 transitions. [2022-07-19 20:39:14,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2022-07-19 20:39:14,811 INFO L276 IsEmpty]: Start isEmpty. Operand 23923 states and 36141 transitions. [2022-07-19 20:39:14,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-07-19 20:39:14,819 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:39:14,819 INFO L195 NwaCegarLoop]: 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] [2022-07-19 20:39:14,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-19 20:39:14,820 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:39:14,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:39:14,820 INFO L85 PathProgramCache]: Analyzing trace with hash 310592366, now seen corresponding path program 1 times [2022-07-19 20:39:14,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:39:14,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102973074] [2022-07-19 20:39:14,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:39:14,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:39:14,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:39:14,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:39:14,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:39:14,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 20:39:14,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:39:14,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-19 20:39:14,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:39:14,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-19 20:39:14,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:39:14,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-07-19 20:39:14,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:39:14,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:39:14,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:39:14,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102973074] [2022-07-19 20:39:14,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102973074] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:39:14,907 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:39:14,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 20:39:14,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947927084] [2022-07-19 20:39:14,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:39:14,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 20:39:14,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:39:14,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 20:39:14,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 20:39:14,908 INFO L87 Difference]: Start difference. First operand 23923 states and 36141 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2022-07-19 20:39:24,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:39:24,457 INFO L93 Difference]: Finished difference Result 83399 states and 130394 transitions. [2022-07-19 20:39:24,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-19 20:39:24,457 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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 157 [2022-07-19 20:39:24,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:39:24,627 INFO L225 Difference]: With dead ends: 83399 [2022-07-19 20:39:24,627 INFO L226 Difference]: Without dead ends: 63464 [2022-07-19 20:39:24,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-07-19 20:39:24,677 INFO L413 NwaCegarLoop]: 1084 mSDtfsCounter, 1636 mSDsluCounter, 1928 mSDsCounter, 0 mSdLazyCounter, 3156 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1664 SdHoareTripleChecker+Valid, 3012 SdHoareTripleChecker+Invalid, 3289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 3156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-19 20:39:24,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1664 Valid, 3012 Invalid, 3289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 3156 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-19 20:39:24,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63464 states. [2022-07-19 20:39:28,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63464 to 43532. [2022-07-19 20:39:28,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43532 states, 39420 states have (on average 1.5119482496194825) internal successors, (59601), 39600 states have internal predecessors, (59601), 2778 states have call successors, (2778), 1098 states have call predecessors, (2778), 1332 states have return successors, (5254), 2962 states have call predecessors, (5254), 2774 states have call successors, (5254) [2022-07-19 20:39:28,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43532 states to 43532 states and 67633 transitions. [2022-07-19 20:39:28,946 INFO L78 Accepts]: Start accepts. Automaton has 43532 states and 67633 transitions. Word has length 157 [2022-07-19 20:39:28,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:39:28,947 INFO L495 AbstractCegarLoop]: Abstraction has 43532 states and 67633 transitions. [2022-07-19 20:39:28,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2022-07-19 20:39:28,947 INFO L276 IsEmpty]: Start isEmpty. Operand 43532 states and 67633 transitions. [2022-07-19 20:39:28,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-07-19 20:39:28,962 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:39:28,962 INFO L195 NwaCegarLoop]: 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] [2022-07-19 20:39:28,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-19 20:39:28,963 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:39:28,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:39:28,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1172425968, now seen corresponding path program 1 times [2022-07-19 20:39:28,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:39:28,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081675110] [2022-07-19 20:39:28,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:39:28,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:39:28,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:39:28,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:39:28,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:39:29,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 20:39:29,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:39:29,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-19 20:39:29,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:39:29,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-19 20:39:29,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:39:29,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-07-19 20:39:29,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:39:29,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:39:29,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:39:29,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081675110] [2022-07-19 20:39:29,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081675110] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:39:29,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:39:29,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 20:39:29,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766973034] [2022-07-19 20:39:29,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:39:29,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 20:39:29,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:39:29,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 20:39:29,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 20:39:29,072 INFO L87 Difference]: Start difference. First operand 43532 states and 67633 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2022-07-19 20:39:45,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:39:45,250 INFO L93 Difference]: Finished difference Result 157708 states and 250892 transitions. [2022-07-19 20:39:45,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-19 20:39:45,251 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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 157 [2022-07-19 20:39:45,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:39:45,596 INFO L225 Difference]: With dead ends: 157708 [2022-07-19 20:39:45,597 INFO L226 Difference]: Without dead ends: 118164 [2022-07-19 20:39:45,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-07-19 20:39:45,699 INFO L413 NwaCegarLoop]: 935 mSDtfsCounter, 1800 mSDsluCounter, 1928 mSDsCounter, 0 mSdLazyCounter, 2714 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1840 SdHoareTripleChecker+Valid, 2863 SdHoareTripleChecker+Invalid, 2850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 2714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-19 20:39:45,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1840 Valid, 2863 Invalid, 2850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 2714 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-07-19 20:39:45,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118164 states. [2022-07-19 20:39:53,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118164 to 82814. [2022-07-19 20:39:53,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82814 states, 75630 states have (on average 1.525598307549914) internal successors, (115381), 75938 states have internal predecessors, (115381), 4954 states have call successors, (4954), 1866 states have call predecessors, (4954), 2228 states have return successors, (11932), 5266 states have call predecessors, (11932), 4950 states have call successors, (11932) [2022-07-19 20:39:53,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82814 states to 82814 states and 132267 transitions. [2022-07-19 20:39:53,517 INFO L78 Accepts]: Start accepts. Automaton has 82814 states and 132267 transitions. Word has length 157 [2022-07-19 20:39:53,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:39:53,517 INFO L495 AbstractCegarLoop]: Abstraction has 82814 states and 132267 transitions. [2022-07-19 20:39:53,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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) [2022-07-19 20:39:53,517 INFO L276 IsEmpty]: Start isEmpty. Operand 82814 states and 132267 transitions. [2022-07-19 20:39:53,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-07-19 20:39:53,544 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:39:53,544 INFO L195 NwaCegarLoop]: 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] [2022-07-19 20:39:53,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-07-19 20:39:53,544 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:39:53,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:39:53,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1660473074, now seen corresponding path program 1 times [2022-07-19 20:39:53,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:39:53,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740222741] [2022-07-19 20:39:53,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:39:53,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:39:53,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:39:53,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:39:53,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:39:53,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 20:39:53,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:39:53,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-19 20:39:53,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:39:53,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-19 20:39:53,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:39:53,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-07-19 20:39:53,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:39:53,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:39:53,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:39:53,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740222741] [2022-07-19 20:39:53,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740222741] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:39:53,651 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:39:53,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 20:39:53,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254354637] [2022-07-19 20:39:53,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:39:53,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 20:39:53,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:39:53,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 20:39:53,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 20:39:53,653 INFO L87 Difference]: Start difference. First operand 82814 states and 132267 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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)