./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.05.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.05.cil-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8b411c6ac71505d2c5059a06fd3211eebca89561d9ac8be37f9ecc9ff82a7a16 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 13:12:34,819 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 13:12:34,821 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 13:12:34,882 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 13:12:34,885 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 13:12:34,885 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 13:12:34,886 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 13:12:34,888 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 13:12:34,891 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 13:12:34,891 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 13:12:34,898 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 13:12:34,899 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 13:12:34,900 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 13:12:34,902 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 13:12:34,902 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 13:12:34,903 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 13:12:34,904 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 13:12:34,904 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 13:12:34,905 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 13:12:34,907 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 13:12:34,907 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 13:12:34,908 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 13:12:34,909 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 13:12:34,910 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 13:12:34,911 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 13:12:34,911 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 13:12:34,912 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 13:12:34,912 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 13:12:34,913 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 13:12:34,913 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 13:12:34,913 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 13:12:34,914 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 13:12:34,914 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 13:12:34,915 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 13:12:34,915 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 13:12:34,916 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 13:12:34,916 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 13:12:34,916 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 13:12:34,917 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 13:12:34,917 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 13:12:34,918 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 13:12:34,918 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 13:12:34,933 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 13:12:34,933 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 13:12:34,934 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 13:12:34,934 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 13:12:34,934 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 13:12:34,934 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 13:12:34,935 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 13:12:34,935 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 13:12:34,935 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 13:12:34,935 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 13:12:34,935 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 13:12:34,935 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 13:12:34,936 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 13:12:34,936 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 13:12:34,936 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 13:12:34,936 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 13:12:34,936 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 13:12:34,936 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 13:12:34,936 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 13:12:34,937 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 13:12:34,937 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 13:12:34,937 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 13:12:34,937 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 13:12:34,937 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 13:12:34,937 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:12:34,937 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 13:12:34,938 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 13:12:34,938 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 13:12:34,938 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 13:12:34,938 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 13:12:34,938 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 13:12:34,938 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 13:12:34,938 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 13:12:34,939 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 13:12:34,939 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8b411c6ac71505d2c5059a06fd3211eebca89561d9ac8be37f9ecc9ff82a7a16 [2021-12-22 13:12:35,168 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 13:12:35,194 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 13:12:35,196 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 13:12:35,197 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 13:12:35,198 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 13:12:35,199 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.05.cil-2.c [2021-12-22 13:12:35,264 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dde54f822/a729a670297c493080acdd25730f98c7/FLAGc69bbe79c [2021-12-22 13:12:35,634 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 13:12:35,636 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.05.cil-2.c [2021-12-22 13:12:35,664 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dde54f822/a729a670297c493080acdd25730f98c7/FLAGc69bbe79c [2021-12-22 13:12:35,687 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dde54f822/a729a670297c493080acdd25730f98c7 [2021-12-22 13:12:35,690 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 13:12:35,691 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 13:12:35,714 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 13:12:35,715 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 13:12:35,724 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 13:12:35,724 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:12:35" (1/1) ... [2021-12-22 13:12:35,725 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31422606 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:12:35, skipping insertion in model container [2021-12-22 13:12:35,725 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:12:35" (1/1) ... [2021-12-22 13:12:35,730 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 13:12:35,773 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 13:12:35,963 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.05.cil-2.c[914,927] [2021-12-22 13:12:36,023 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.05.cil-2.c[7115,7128] [2021-12-22 13:12:36,082 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:12:36,096 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 13:12:36,107 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.05.cil-2.c[914,927] [2021-12-22 13:12:36,129 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.05.cil-2.c[7115,7128] [2021-12-22 13:12:36,160 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:12:36,177 INFO L208 MainTranslator]: Completed translation [2021-12-22 13:12:36,178 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:12:36 WrapperNode [2021-12-22 13:12:36,178 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 13:12:36,179 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 13:12:36,179 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 13:12:36,179 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 13:12:36,185 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:12:36" (1/1) ... [2021-12-22 13:12:36,205 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:12:36" (1/1) ... [2021-12-22 13:12:36,236 INFO L137 Inliner]: procedures = 63, calls = 73, calls flagged for inlining = 31, calls inlined = 31, statements flattened = 639 [2021-12-22 13:12:36,241 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 13:12:36,241 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 13:12:36,242 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 13:12:36,242 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 13:12:36,247 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:12:36" (1/1) ... [2021-12-22 13:12:36,248 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:12:36" (1/1) ... [2021-12-22 13:12:36,254 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:12:36" (1/1) ... [2021-12-22 13:12:36,254 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:12:36" (1/1) ... [2021-12-22 13:12:36,266 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:12:36" (1/1) ... [2021-12-22 13:12:36,272 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:12:36" (1/1) ... [2021-12-22 13:12:36,274 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:12:36" (1/1) ... [2021-12-22 13:12:36,288 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 13:12:36,289 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 13:12:36,289 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 13:12:36,289 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 13:12:36,290 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:12:36" (1/1) ... [2021-12-22 13:12:36,299 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:12:36,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:12:36,325 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-22 13:12:36,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 13:12:36,356 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 13:12:36,356 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-22 13:12:36,356 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-22 13:12:36,356 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2021-12-22 13:12:36,358 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2021-12-22 13:12:36,358 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-22 13:12:36,358 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-22 13:12:36,358 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-22 13:12:36,358 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-22 13:12:36,358 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2021-12-22 13:12:36,358 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2021-12-22 13:12:36,358 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-22 13:12:36,359 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-22 13:12:36,359 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-22 13:12:36,359 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-22 13:12:36,359 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2021-12-22 13:12:36,359 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2021-12-22 13:12:36,359 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2021-12-22 13:12:36,359 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2021-12-22 13:12:36,359 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2021-12-22 13:12:36,359 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2021-12-22 13:12:36,360 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-22 13:12:36,360 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-22 13:12:36,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 13:12:36,360 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-22 13:12:36,360 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-22 13:12:36,360 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2021-12-22 13:12:36,360 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2021-12-22 13:12:36,360 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 13:12:36,361 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 13:12:36,361 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-22 13:12:36,361 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-22 13:12:36,361 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2021-12-22 13:12:36,361 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2021-12-22 13:12:36,495 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 13:12:36,496 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 13:12:36,983 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 13:12:36,990 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 13:12:36,990 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2021-12-22 13:12:36,992 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:12:36 BoogieIcfgContainer [2021-12-22 13:12:36,992 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 13:12:36,993 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 13:12:36,993 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 13:12:36,995 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 13:12:36,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:12:35" (1/3) ... [2021-12-22 13:12:36,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b0a4dd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:12:36, skipping insertion in model container [2021-12-22 13:12:36,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:12:36" (2/3) ... [2021-12-22 13:12:36,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b0a4dd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:12:36, skipping insertion in model container [2021-12-22 13:12:36,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:12:36" (3/3) ... [2021-12-22 13:12:36,997 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.05.cil-2.c [2021-12-22 13:12:37,000 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 13:12:37,000 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-22 13:12:37,029 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 13:12:37,033 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 13:12:37,034 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-22 13:12:37,050 INFO L276 IsEmpty]: Start isEmpty. Operand has 316 states, 263 states have (on average 1.6045627376425855) internal successors, (422), 271 states have internal predecessors, (422), 35 states have call successors, (35), 15 states have call predecessors, (35), 15 states have return successors, (35), 33 states have call predecessors, (35), 35 states have call successors, (35) [2021-12-22 13:12:37,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-22 13:12:37,056 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:37,057 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:12:37,057 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:37,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:37,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1403612633, now seen corresponding path program 1 times [2021-12-22 13:12:37,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:37,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440152488] [2021-12-22 13:12:37,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:37,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:37,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:37,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:37,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:37,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:12:37,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:37,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:12:37,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:37,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:12:37,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:37,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:12:37,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:37,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:12:37,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:37,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:12:37,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:37,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:12:37,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:37,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440152488] [2021-12-22 13:12:37,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440152488] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:37,261 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:12:37,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 13:12:37,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869564961] [2021-12-22 13:12:37,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:37,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:12:37,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:37,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:12:37,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:12:37,284 INFO L87 Difference]: Start difference. First operand has 316 states, 263 states have (on average 1.6045627376425855) internal successors, (422), 271 states have internal predecessors, (422), 35 states have call successors, (35), 15 states have call predecessors, (35), 15 states have return successors, (35), 33 states have call predecessors, (35), 35 states have call successors, (35) Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-22 13:12:37,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:37,738 INFO L93 Difference]: Finished difference Result 628 states and 977 transitions. [2021-12-22 13:12:37,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 13:12:37,740 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 3 states have internal predecessors, (50), 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 65 [2021-12-22 13:12:37,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:37,749 INFO L225 Difference]: With dead ends: 628 [2021-12-22 13:12:37,749 INFO L226 Difference]: Without dead ends: 323 [2021-12-22 13:12:37,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:12:37,755 INFO L933 BasicCegarLoop]: 455 mSDtfsCounter, 474 mSDsluCounter, 824 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 1279 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:37,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [484 Valid, 1279 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 13:12:37,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-12-22 13:12:37,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 305. [2021-12-22 13:12:37,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 255 states have (on average 1.5098039215686274) internal successors, (385), 260 states have internal predecessors, (385), 35 states have call successors, (35), 15 states have call predecessors, (35), 13 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2021-12-22 13:12:37,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 451 transitions. [2021-12-22 13:12:37,800 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 451 transitions. Word has length 65 [2021-12-22 13:12:37,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:37,800 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 451 transitions. [2021-12-22 13:12:37,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-22 13:12:37,801 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 451 transitions. [2021-12-22 13:12:37,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-22 13:12:37,803 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:37,803 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:12:37,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 13:12:37,804 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:37,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:37,804 INFO L85 PathProgramCache]: Analyzing trace with hash 16827223, now seen corresponding path program 1 times [2021-12-22 13:12:37,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:37,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144468789] [2021-12-22 13:12:37,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:37,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:37,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:37,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:37,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:37,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:12:37,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:37,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:12:37,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:37,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:12:37,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:37,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:12:37,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:37,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:12:37,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:37,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:12:37,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:37,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:12:37,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:37,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144468789] [2021-12-22 13:12:37,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144468789] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:37,919 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:12:37,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 13:12:37,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906718603] [2021-12-22 13:12:37,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:37,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 13:12:37,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:37,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 13:12:37,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:12:37,922 INFO L87 Difference]: Start difference. First operand 305 states and 451 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-22 13:12:38,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:38,584 INFO L93 Difference]: Finished difference Result 528 states and 765 transitions. [2021-12-22 13:12:38,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 13:12:38,585 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-22 13:12:38,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:38,588 INFO L225 Difference]: With dead ends: 528 [2021-12-22 13:12:38,588 INFO L226 Difference]: Without dead ends: 440 [2021-12-22 13:12:38,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-12-22 13:12:38,590 INFO L933 BasicCegarLoop]: 456 mSDtfsCounter, 569 mSDsluCounter, 1292 mSDsCounter, 0 mSdLazyCounter, 815 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 574 SdHoareTripleChecker+Valid, 1748 SdHoareTripleChecker+Invalid, 945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:38,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [574 Valid, 1748 Invalid, 945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 815 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 13:12:38,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-12-22 13:12:38,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 401. [2021-12-22 13:12:38,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 331 states have (on average 1.4773413897280967) internal successors, (489), 338 states have internal predecessors, (489), 46 states have call successors, (46), 22 states have call predecessors, (46), 22 states have return successors, (47), 43 states have call predecessors, (47), 42 states have call successors, (47) [2021-12-22 13:12:38,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 582 transitions. [2021-12-22 13:12:38,614 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 582 transitions. Word has length 65 [2021-12-22 13:12:38,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:38,615 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 582 transitions. [2021-12-22 13:12:38,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-22 13:12:38,615 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 582 transitions. [2021-12-22 13:12:38,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-22 13:12:38,616 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:38,617 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:12:38,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 13:12:38,617 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:38,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:38,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1695715863, now seen corresponding path program 1 times [2021-12-22 13:12:38,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:38,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496255526] [2021-12-22 13:12:38,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:38,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:38,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:38,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:38,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:38,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:12:38,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:38,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:12:38,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:38,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:12:38,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:38,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:12:38,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:38,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:12:38,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:38,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:12:38,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:38,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:12:38,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:38,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496255526] [2021-12-22 13:12:38,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496255526] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:38,698 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:12:38,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 13:12:38,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533822320] [2021-12-22 13:12:38,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:38,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 13:12:38,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:38,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 13:12:38,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:12:38,700 INFO L87 Difference]: Start difference. First operand 401 states and 582 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-22 13:12:39,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:39,446 INFO L93 Difference]: Finished difference Result 748 states and 1058 transitions. [2021-12-22 13:12:39,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-22 13:12:39,446 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-22 13:12:39,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:39,450 INFO L225 Difference]: With dead ends: 748 [2021-12-22 13:12:39,450 INFO L226 Difference]: Without dead ends: 571 [2021-12-22 13:12:39,451 INFO L932 BasicCegarLoop]: 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 [2021-12-22 13:12:39,451 INFO L933 BasicCegarLoop]: 512 mSDtfsCounter, 865 mSDsluCounter, 1345 mSDsCounter, 0 mSdLazyCounter, 1021 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 888 SdHoareTripleChecker+Valid, 1857 SdHoareTripleChecker+Invalid, 1144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:39,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [888 Valid, 1857 Invalid, 1144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1021 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-22 13:12:39,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-12-22 13:12:39,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 497. [2021-12-22 13:12:39,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 407 states have (on average 1.4545454545454546) internal successors, (592), 416 states have internal predecessors, (592), 57 states have call successors, (57), 29 states have call predecessors, (57), 31 states have return successors, (66), 55 states have call predecessors, (66), 53 states have call successors, (66) [2021-12-22 13:12:39,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 715 transitions. [2021-12-22 13:12:39,477 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 715 transitions. Word has length 65 [2021-12-22 13:12:39,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:39,477 INFO L470 AbstractCegarLoop]: Abstraction has 497 states and 715 transitions. [2021-12-22 13:12:39,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-22 13:12:39,478 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 715 transitions. [2021-12-22 13:12:39,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-22 13:12:39,480 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:39,480 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:12:39,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 13:12:39,480 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:39,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:39,481 INFO L85 PathProgramCache]: Analyzing trace with hash -332870247, now seen corresponding path program 1 times [2021-12-22 13:12:39,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:39,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156105342] [2021-12-22 13:12:39,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:39,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:39,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:39,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:39,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:39,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:12:39,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:39,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:12:39,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:39,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:12:39,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:39,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:12:39,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:39,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:12:39,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:39,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:12:39,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:39,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:12:39,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:39,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156105342] [2021-12-22 13:12:39,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156105342] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:39,593 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:12:39,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 13:12:39,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39713815] [2021-12-22 13:12:39,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:39,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 13:12:39,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:39,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 13:12:39,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-22 13:12:39,595 INFO L87 Difference]: Start difference. First operand 497 states and 715 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 13:12:40,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:40,156 INFO L93 Difference]: Finished difference Result 798 states and 1129 transitions. [2021-12-22 13:12:40,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-22 13:12:40,156 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2021-12-22 13:12:40,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:40,159 INFO L225 Difference]: With dead ends: 798 [2021-12-22 13:12:40,159 INFO L226 Difference]: Without dead ends: 531 [2021-12-22 13:12:40,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-22 13:12:40,160 INFO L933 BasicCegarLoop]: 439 mSDtfsCounter, 372 mSDsluCounter, 1697 mSDsCounter, 0 mSdLazyCounter, 935 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 2136 SdHoareTripleChecker+Invalid, 1021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 935 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:40,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [373 Valid, 2136 Invalid, 1021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 935 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 13:12:40,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-12-22 13:12:40,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 502. [2021-12-22 13:12:40,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 411 states have (on average 1.4452554744525548) internal successors, (594), 420 states have internal predecessors, (594), 57 states have call successors, (57), 29 states have call predecessors, (57), 32 states have return successors, (67), 56 states have call predecessors, (67), 53 states have call successors, (67) [2021-12-22 13:12:40,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 718 transitions. [2021-12-22 13:12:40,179 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 718 transitions. Word has length 65 [2021-12-22 13:12:40,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:40,180 INFO L470 AbstractCegarLoop]: Abstraction has 502 states and 718 transitions. [2021-12-22 13:12:40,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 13:12:40,180 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 718 transitions. [2021-12-22 13:12:40,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-22 13:12:40,182 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:40,182 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:12:40,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 13:12:40,182 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:40,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:40,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1362229545, now seen corresponding path program 1 times [2021-12-22 13:12:40,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:40,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957015020] [2021-12-22 13:12:40,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:40,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:40,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:40,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:40,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:40,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:12:40,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:40,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:12:40,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:40,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:12:40,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:40,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:12:40,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:40,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:12:40,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:40,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:12:40,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:40,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:12:40,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:40,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957015020] [2021-12-22 13:12:40,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957015020] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:40,282 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:12:40,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 13:12:40,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145583330] [2021-12-22 13:12:40,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:40,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 13:12:40,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:40,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 13:12:40,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-22 13:12:40,284 INFO L87 Difference]: Start difference. First operand 502 states and 718 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 13:12:40,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:40,863 INFO L93 Difference]: Finished difference Result 820 states and 1151 transitions. [2021-12-22 13:12:40,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 13:12:40,864 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2021-12-22 13:12:40,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:40,866 INFO L225 Difference]: With dead ends: 820 [2021-12-22 13:12:40,866 INFO L226 Difference]: Without dead ends: 548 [2021-12-22 13:12:40,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-12-22 13:12:40,867 INFO L933 BasicCegarLoop]: 436 mSDtfsCounter, 552 mSDsluCounter, 1483 mSDsCounter, 0 mSdLazyCounter, 882 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 554 SdHoareTripleChecker+Valid, 1919 SdHoareTripleChecker+Invalid, 1011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:40,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [554 Valid, 1919 Invalid, 1011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 882 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 13:12:40,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2021-12-22 13:12:40,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 517. [2021-12-22 13:12:40,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 423 states have (on average 1.4326241134751774) internal successors, (606), 432 states have internal predecessors, (606), 57 states have call successors, (57), 29 states have call predecessors, (57), 35 states have return successors, (70), 59 states have call predecessors, (70), 53 states have call successors, (70) [2021-12-22 13:12:40,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 733 transitions. [2021-12-22 13:12:40,883 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 733 transitions. Word has length 65 [2021-12-22 13:12:40,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:40,884 INFO L470 AbstractCegarLoop]: Abstraction has 517 states and 733 transitions. [2021-12-22 13:12:40,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 13:12:40,884 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 733 transitions. [2021-12-22 13:12:40,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-22 13:12:40,885 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:40,885 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:12:40,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 13:12:40,886 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:40,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:40,886 INFO L85 PathProgramCache]: Analyzing trace with hash 23973849, now seen corresponding path program 1 times [2021-12-22 13:12:40,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:40,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621524445] [2021-12-22 13:12:40,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:40,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:40,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:40,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:40,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:40,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:12:40,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:40,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:12:40,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:40,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:12:40,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:40,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:12:40,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:40,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:12:40,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:40,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:12:40,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:40,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:12:40,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:40,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621524445] [2021-12-22 13:12:40,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621524445] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:40,951 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:12:40,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 13:12:40,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86913517] [2021-12-22 13:12:40,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:40,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 13:12:40,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:40,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 13:12:40,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:12:40,953 INFO L87 Difference]: Start difference. First operand 517 states and 733 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-22 13:12:41,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:41,613 INFO L93 Difference]: Finished difference Result 909 states and 1244 transitions. [2021-12-22 13:12:41,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-22 13:12:41,614 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-22 13:12:41,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:41,616 INFO L225 Difference]: With dead ends: 909 [2021-12-22 13:12:41,616 INFO L226 Difference]: Without dead ends: 624 [2021-12-22 13:12:41,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-12-22 13:12:41,621 INFO L933 BasicCegarLoop]: 465 mSDtfsCounter, 882 mSDsluCounter, 1154 mSDsCounter, 0 mSdLazyCounter, 946 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 905 SdHoareTripleChecker+Valid, 1619 SdHoareTripleChecker+Invalid, 1081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:41,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [905 Valid, 1619 Invalid, 1081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 946 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 13:12:41,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2021-12-22 13:12:41,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 529. [2021-12-22 13:12:41,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 433 states have (on average 1.4226327944572748) internal successors, (616), 442 states have internal predecessors, (616), 58 states have call successors, (58), 30 states have call predecessors, (58), 36 states have return successors, (69), 60 states have call predecessors, (69), 54 states have call successors, (69) [2021-12-22 13:12:41,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 743 transitions. [2021-12-22 13:12:41,645 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 743 transitions. Word has length 65 [2021-12-22 13:12:41,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:41,647 INFO L470 AbstractCegarLoop]: Abstraction has 529 states and 743 transitions. [2021-12-22 13:12:41,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-22 13:12:41,647 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 743 transitions. [2021-12-22 13:12:41,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-22 13:12:41,648 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:41,648 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:12:41,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 13:12:41,648 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:41,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:41,649 INFO L85 PathProgramCache]: Analyzing trace with hash -110039657, now seen corresponding path program 1 times [2021-12-22 13:12:41,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:41,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937282284] [2021-12-22 13:12:41,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:41,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:41,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:41,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:41,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:41,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:12:41,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:41,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:12:41,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:41,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:12:41,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:41,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:12:41,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:41,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:12:41,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:41,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:12:41,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:41,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:12:41,729 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:41,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937282284] [2021-12-22 13:12:41,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937282284] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:41,729 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:12:41,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:12:41,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564812601] [2021-12-22 13:12:41,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:41,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:12:41,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:41,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:12:41,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:12:41,731 INFO L87 Difference]: Start difference. First operand 529 states and 743 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-22 13:12:42,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:42,042 INFO L93 Difference]: Finished difference Result 1171 states and 1587 transitions. [2021-12-22 13:12:42,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 13:12:42,043 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-22 13:12:42,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:42,046 INFO L225 Difference]: With dead ends: 1171 [2021-12-22 13:12:42,046 INFO L226 Difference]: Without dead ends: 875 [2021-12-22 13:12:42,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-12-22 13:12:42,048 INFO L933 BasicCegarLoop]: 424 mSDtfsCounter, 1071 mSDsluCounter, 660 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1097 SdHoareTripleChecker+Valid, 1084 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:42,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1097 Valid, 1084 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 13:12:42,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2021-12-22 13:12:42,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 819. [2021-12-22 13:12:42,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 657 states have (on average 1.36986301369863) internal successors, (900), 673 states have internal predecessors, (900), 93 states have call successors, (93), 52 states have call predecessors, (93), 67 states have return successors, (126), 100 states have call predecessors, (126), 89 states have call successors, (126) [2021-12-22 13:12:42,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 1119 transitions. [2021-12-22 13:12:42,075 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 1119 transitions. Word has length 65 [2021-12-22 13:12:42,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:42,075 INFO L470 AbstractCegarLoop]: Abstraction has 819 states and 1119 transitions. [2021-12-22 13:12:42,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-22 13:12:42,076 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 1119 transitions. [2021-12-22 13:12:42,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-22 13:12:42,078 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:42,078 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:12:42,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 13:12:42,078 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:42,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:42,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1566755896, now seen corresponding path program 1 times [2021-12-22 13:12:42,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:42,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910763336] [2021-12-22 13:12:42,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:42,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:42,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:42,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:42,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:42,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:12:42,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:42,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:12:42,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:42,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:12:42,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:42,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:12:42,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:42,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:12:42,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:42,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:12:42,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:42,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:12:42,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:42,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910763336] [2021-12-22 13:12:42,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910763336] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:42,141 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:12:42,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 13:12:42,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116380677] [2021-12-22 13:12:42,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:42,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:12:42,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:42,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:12:42,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:12:42,144 INFO L87 Difference]: Start difference. First operand 819 states and 1119 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 13:12:42,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:42,497 INFO L93 Difference]: Finished difference Result 2022 states and 2686 transitions. [2021-12-22 13:12:42,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 13:12:42,497 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2021-12-22 13:12:42,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:42,503 INFO L225 Difference]: With dead ends: 2022 [2021-12-22 13:12:42,503 INFO L226 Difference]: Without dead ends: 1415 [2021-12-22 13:12:42,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:12:42,504 INFO L933 BasicCegarLoop]: 440 mSDtfsCounter, 551 mSDsluCounter, 837 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 1277 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:42,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [559 Valid, 1277 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 13:12:42,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1415 states. [2021-12-22 13:12:42,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1415 to 1300. [2021-12-22 13:12:42,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1300 states, 1036 states have (on average 1.334942084942085) internal successors, (1383), 1055 states have internal predecessors, (1383), 138 states have call successors, (138), 96 states have call predecessors, (138), 124 states have return successors, (198), 155 states have call predecessors, (198), 134 states have call successors, (198) [2021-12-22 13:12:42,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1300 states to 1300 states and 1719 transitions. [2021-12-22 13:12:42,541 INFO L78 Accepts]: Start accepts. Automaton has 1300 states and 1719 transitions. Word has length 66 [2021-12-22 13:12:42,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:42,541 INFO L470 AbstractCegarLoop]: Abstraction has 1300 states and 1719 transitions. [2021-12-22 13:12:42,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 13:12:42,541 INFO L276 IsEmpty]: Start isEmpty. Operand 1300 states and 1719 transitions. [2021-12-22 13:12:42,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-22 13:12:42,543 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:42,543 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:12:42,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 13:12:42,544 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:42,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:42,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1269971741, now seen corresponding path program 1 times [2021-12-22 13:12:42,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:42,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777614005] [2021-12-22 13:12:42,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:42,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:42,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:42,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:42,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:42,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:12:42,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:42,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:12:42,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:42,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:12:42,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:42,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:12:42,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:42,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:12:42,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:42,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:12:42,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:42,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:12:42,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:42,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777614005] [2021-12-22 13:12:42,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777614005] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:42,613 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:12:42,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 13:12:42,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028368571] [2021-12-22 13:12:42,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:42,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:12:42,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:42,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:12:42,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:12:42,615 INFO L87 Difference]: Start difference. First operand 1300 states and 1719 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 13:12:42,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:42,883 INFO L93 Difference]: Finished difference Result 3488 states and 4525 transitions. [2021-12-22 13:12:42,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-22 13:12:42,884 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2021-12-22 13:12:42,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:42,891 INFO L225 Difference]: With dead ends: 3488 [2021-12-22 13:12:42,891 INFO L226 Difference]: Without dead ends: 2420 [2021-12-22 13:12:42,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-12-22 13:12:42,896 INFO L933 BasicCegarLoop]: 441 mSDtfsCounter, 1072 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1098 SdHoareTripleChecker+Valid, 894 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:42,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1098 Valid, 894 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 13:12:42,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2420 states. [2021-12-22 13:12:42,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2420 to 2162. [2021-12-22 13:12:42,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2162 states, 1702 states have (on average 1.298472385428907) internal successors, (2210), 1731 states have internal predecessors, (2210), 236 states have call successors, (236), 180 states have call predecessors, (236), 222 states have return successors, (334), 257 states have call predecessors, (334), 232 states have call successors, (334) [2021-12-22 13:12:42,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2162 states to 2162 states and 2780 transitions. [2021-12-22 13:12:42,984 INFO L78 Accepts]: Start accepts. Automaton has 2162 states and 2780 transitions. Word has length 66 [2021-12-22 13:12:42,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:42,985 INFO L470 AbstractCegarLoop]: Abstraction has 2162 states and 2780 transitions. [2021-12-22 13:12:42,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 13:12:42,985 INFO L276 IsEmpty]: Start isEmpty. Operand 2162 states and 2780 transitions. [2021-12-22 13:12:42,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-22 13:12:42,986 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:42,986 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:12:42,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 13:12:42,987 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:42,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:42,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1499029609, now seen corresponding path program 1 times [2021-12-22 13:12:42,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:42,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827124127] [2021-12-22 13:12:42,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:42,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:42,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:43,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:43,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:43,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:12:43,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:43,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:12:43,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:43,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:12:43,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:43,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:12:43,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:43,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:12:43,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:43,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:12:43,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:43,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:12:43,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:43,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827124127] [2021-12-22 13:12:43,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827124127] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:43,043 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:12:43,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 13:12:43,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153287427] [2021-12-22 13:12:43,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:43,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:12:43,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:43,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:12:43,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:12:43,045 INFO L87 Difference]: Start difference. First operand 2162 states and 2780 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 13:12:43,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:43,342 INFO L93 Difference]: Finished difference Result 5072 states and 6430 transitions. [2021-12-22 13:12:43,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 13:12:43,342 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 72 [2021-12-22 13:12:43,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:43,353 INFO L225 Difference]: With dead ends: 5072 [2021-12-22 13:12:43,353 INFO L226 Difference]: Without dead ends: 3142 [2021-12-22 13:12:43,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:12:43,357 INFO L933 BasicCegarLoop]: 455 mSDtfsCounter, 1053 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1079 SdHoareTripleChecker+Valid, 930 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:43,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1079 Valid, 930 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 13:12:43,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3142 states. [2021-12-22 13:12:43,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3142 to 2894. [2021-12-22 13:12:43,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2894 states, 2270 states have (on average 1.2837004405286343) internal successors, (2914), 2307 states have internal predecessors, (2914), 316 states have call successors, (316), 250 states have call predecessors, (316), 306 states have return successors, (443), 343 states have call predecessors, (443), 312 states have call successors, (443) [2021-12-22 13:12:43,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2894 states to 2894 states and 3673 transitions. [2021-12-22 13:12:43,466 INFO L78 Accepts]: Start accepts. Automaton has 2894 states and 3673 transitions. Word has length 72 [2021-12-22 13:12:43,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:43,467 INFO L470 AbstractCegarLoop]: Abstraction has 2894 states and 3673 transitions. [2021-12-22 13:12:43,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 13:12:43,468 INFO L276 IsEmpty]: Start isEmpty. Operand 2894 states and 3673 transitions. [2021-12-22 13:12:43,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-22 13:12:43,469 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:43,469 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:12:43,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 13:12:43,469 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:43,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:43,470 INFO L85 PathProgramCache]: Analyzing trace with hash 258278453, now seen corresponding path program 1 times [2021-12-22 13:12:43,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:43,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145886795] [2021-12-22 13:12:43,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:43,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:43,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:43,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:43,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:43,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:12:43,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:43,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:12:43,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:43,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:12:43,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:43,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:12:43,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:43,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:12:43,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:43,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:12:43,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:43,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:12:43,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:43,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145886795] [2021-12-22 13:12:43,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145886795] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:43,524 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:12:43,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:12:43,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486612511] [2021-12-22 13:12:43,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:43,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:12:43,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:43,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:12:43,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:12:43,526 INFO L87 Difference]: Start difference. First operand 2894 states and 3673 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-22 13:12:43,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:43,876 INFO L93 Difference]: Finished difference Result 3668 states and 4604 transitions. [2021-12-22 13:12:43,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-22 13:12:43,876 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 73 [2021-12-22 13:12:43,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:43,887 INFO L225 Difference]: With dead ends: 3668 [2021-12-22 13:12:43,888 INFO L226 Difference]: Without dead ends: 3665 [2021-12-22 13:12:43,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-12-22 13:12:43,889 INFO L933 BasicCegarLoop]: 450 mSDtfsCounter, 1499 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 309 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1509 SdHoareTripleChecker+Valid, 900 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 309 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:43,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1509 Valid, 900 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [309 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 13:12:43,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3665 states. [2021-12-22 13:12:43,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3665 to 3388. [2021-12-22 13:12:44,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3388 states, 2655 states have (on average 1.2753295668549907) internal successors, (3386), 2697 states have internal predecessors, (3386), 366 states have call successors, (366), 294 states have call predecessors, (366), 365 states have return successors, (522), 403 states have call predecessors, (522), 363 states have call successors, (522) [2021-12-22 13:12:44,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3388 states to 3388 states and 4274 transitions. [2021-12-22 13:12:44,007 INFO L78 Accepts]: Start accepts. Automaton has 3388 states and 4274 transitions. Word has length 73 [2021-12-22 13:12:44,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:44,007 INFO L470 AbstractCegarLoop]: Abstraction has 3388 states and 4274 transitions. [2021-12-22 13:12:44,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-22 13:12:44,008 INFO L276 IsEmpty]: Start isEmpty. Operand 3388 states and 4274 transitions. [2021-12-22 13:12:44,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-22 13:12:44,009 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:44,009 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:12:44,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-22 13:12:44,009 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:44,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:44,009 INFO L85 PathProgramCache]: Analyzing trace with hash -584250463, now seen corresponding path program 1 times [2021-12-22 13:12:44,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:44,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903419488] [2021-12-22 13:12:44,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:44,010 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:44,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:44,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:44,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:44,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:12:44,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:44,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:12:44,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:44,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:12:44,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:44,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:12:44,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:44,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:12:44,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:44,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:12:44,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:44,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:12:44,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:44,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903419488] [2021-12-22 13:12:44,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903419488] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:12:44,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934037718] [2021-12-22 13:12:44,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:44,108 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:12:44,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:12:44,109 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:12:44,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 13:12:44,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:44,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-22 13:12:44,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:12:44,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:12:44,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:12:44,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:12:44,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934037718] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:12:44,771 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:12:44,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 4] total 10 [2021-12-22 13:12:44,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012966658] [2021-12-22 13:12:44,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:12:44,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:12:44,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:44,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:12:44,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:12:44,772 INFO L87 Difference]: Start difference. First operand 3388 states and 4274 transitions. Second operand has 10 states, 10 states have (on average 12.0) internal successors, (120), 7 states have internal predecessors, (120), 4 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-12-22 13:12:46,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:46,053 INFO L93 Difference]: Finished difference Result 7829 states and 9760 transitions. [2021-12-22 13:12:46,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-22 13:12:46,053 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.0) internal successors, (120), 7 states have internal predecessors, (120), 4 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 74 [2021-12-22 13:12:46,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:46,078 INFO L225 Difference]: With dead ends: 7829 [2021-12-22 13:12:46,078 INFO L226 Difference]: Without dead ends: 7826 [2021-12-22 13:12:46,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 174 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2021-12-22 13:12:46,080 INFO L933 BasicCegarLoop]: 608 mSDtfsCounter, 1299 mSDsluCounter, 1702 mSDsCounter, 0 mSdLazyCounter, 1757 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1364 SdHoareTripleChecker+Valid, 2310 SdHoareTripleChecker+Invalid, 1955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 1757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:46,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1364 Valid, 2310 Invalid, 1955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 1757 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-22 13:12:46,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7826 states. [2021-12-22 13:12:46,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7826 to 5178. [2021-12-22 13:12:46,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5178 states, 4059 states have (on average 1.271741808327174) internal successors, (5162), 4123 states have internal predecessors, (5162), 550 states have call successors, (550), 452 states have call predecessors, (550), 567 states have return successors, (800), 609 states have call predecessors, (800), 547 states have call successors, (800) [2021-12-22 13:12:46,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5178 states to 5178 states and 6512 transitions. [2021-12-22 13:12:46,351 INFO L78 Accepts]: Start accepts. Automaton has 5178 states and 6512 transitions. Word has length 74 [2021-12-22 13:12:46,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:46,351 INFO L470 AbstractCegarLoop]: Abstraction has 5178 states and 6512 transitions. [2021-12-22 13:12:46,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.0) internal successors, (120), 7 states have internal predecessors, (120), 4 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-12-22 13:12:46,352 INFO L276 IsEmpty]: Start isEmpty. Operand 5178 states and 6512 transitions. [2021-12-22 13:12:46,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-22 13:12:46,353 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:46,353 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:12:46,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 13:12:46,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-22 13:12:46,566 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:46,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:46,567 INFO L85 PathProgramCache]: Analyzing trace with hash 957331893, now seen corresponding path program 2 times [2021-12-22 13:12:46,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:46,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053319809] [2021-12-22 13:12:46,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:46,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:46,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:46,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:46,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:46,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:12:46,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:46,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:12:46,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:46,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:12:46,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:46,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:12:46,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:46,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:12:46,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:46,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:12:46,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:46,634 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:12:46,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:46,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053319809] [2021-12-22 13:12:46,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053319809] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:46,635 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:12:46,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 13:12:46,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423605010] [2021-12-22 13:12:46,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:46,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:12:46,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:46,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:12:46,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:12:46,636 INFO L87 Difference]: Start difference. First operand 5178 states and 6512 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-22 13:12:47,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:47,031 INFO L93 Difference]: Finished difference Result 7860 states and 9885 transitions. [2021-12-22 13:12:47,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 13:12:47,031 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 77 [2021-12-22 13:12:47,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:47,044 INFO L225 Difference]: With dead ends: 7860 [2021-12-22 13:12:47,045 INFO L226 Difference]: Without dead ends: 3785 [2021-12-22 13:12:47,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:12:47,052 INFO L933 BasicCegarLoop]: 500 mSDtfsCounter, 941 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 970 SdHoareTripleChecker+Valid, 1020 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:47,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [970 Valid, 1020 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 13:12:47,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3785 states. [2021-12-22 13:12:47,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3785 to 3550. [2021-12-22 13:12:47,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3550 states, 2787 states have (on average 1.2565482597775386) internal successors, (3502), 2829 states have internal predecessors, (3502), 382 states have call successors, (382), 308 states have call predecessors, (382), 379 states have return successors, (526), 419 states have call predecessors, (526), 379 states have call successors, (526) [2021-12-22 13:12:47,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3550 states to 3550 states and 4410 transitions. [2021-12-22 13:12:47,226 INFO L78 Accepts]: Start accepts. Automaton has 3550 states and 4410 transitions. Word has length 77 [2021-12-22 13:12:47,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:47,226 INFO L470 AbstractCegarLoop]: Abstraction has 3550 states and 4410 transitions. [2021-12-22 13:12:47,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-22 13:12:47,227 INFO L276 IsEmpty]: Start isEmpty. Operand 3550 states and 4410 transitions. [2021-12-22 13:12:47,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-22 13:12:47,228 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:47,229 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:12:47,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-22 13:12:47,229 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:47,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:47,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1430467283, now seen corresponding path program 1 times [2021-12-22 13:12:47,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:47,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123316163] [2021-12-22 13:12:47,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:47,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:47,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:47,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:47,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:47,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:12:47,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:47,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:12:47,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:47,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:12:47,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:47,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:12:47,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:47,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:12:47,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:47,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:12:47,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:47,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-22 13:12:47,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:47,303 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-22 13:12:47,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:47,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123316163] [2021-12-22 13:12:47,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123316163] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:47,303 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:12:47,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 13:12:47,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943240058] [2021-12-22 13:12:47,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:47,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 13:12:47,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:47,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 13:12:47,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:12:47,304 INFO L87 Difference]: Start difference. First operand 3550 states and 4410 transitions. Second operand has 8 states, 8 states have (on average 7.875) internal successors, (63), 5 states have internal predecessors, (63), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-22 13:12:48,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:48,330 INFO L93 Difference]: Finished difference Result 10406 states and 12791 transitions. [2021-12-22 13:12:48,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-22 13:12:48,330 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 5 states have internal predecessors, (63), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 84 [2021-12-22 13:12:48,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:48,349 INFO L225 Difference]: With dead ends: 10406 [2021-12-22 13:12:48,349 INFO L226 Difference]: Without dead ends: 5785 [2021-12-22 13:12:48,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2021-12-22 13:12:48,358 INFO L933 BasicCegarLoop]: 493 mSDtfsCounter, 1011 mSDsluCounter, 1141 mSDsCounter, 0 mSdLazyCounter, 894 mSolverCounterSat, 270 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1024 SdHoareTripleChecker+Valid, 1634 SdHoareTripleChecker+Invalid, 1164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 270 IncrementalHoareTripleChecker+Valid, 894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:48,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1024 Valid, 1634 Invalid, 1164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [270 Valid, 894 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-22 13:12:48,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5785 states. [2021-12-22 13:12:48,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5785 to 5465. [2021-12-22 13:12:48,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5465 states, 4245 states have (on average 1.2318021201413427) internal successors, (5229), 4330 states have internal predecessors, (5229), 586 states have call successors, (586), 482 states have call predecessors, (586), 632 states have return successors, (908), 659 states have call predecessors, (908), 583 states have call successors, (908) [2021-12-22 13:12:48,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5465 states to 5465 states and 6723 transitions. [2021-12-22 13:12:48,624 INFO L78 Accepts]: Start accepts. Automaton has 5465 states and 6723 transitions. Word has length 84 [2021-12-22 13:12:48,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:48,624 INFO L470 AbstractCegarLoop]: Abstraction has 5465 states and 6723 transitions. [2021-12-22 13:12:48,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 5 states have internal predecessors, (63), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-22 13:12:48,625 INFO L276 IsEmpty]: Start isEmpty. Operand 5465 states and 6723 transitions. [2021-12-22 13:12:48,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-22 13:12:48,627 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:48,628 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:12:48,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-22 13:12:48,628 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:48,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:48,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1891118771, now seen corresponding path program 1 times [2021-12-22 13:12:48,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:48,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243279211] [2021-12-22 13:12:48,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:48,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:48,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:48,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:48,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:48,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:12:48,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:48,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:12:48,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:48,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:12:48,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:48,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:12:48,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:48,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:12:48,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:48,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:12:48,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:48,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-22 13:12:48,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:48,689 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 13:12:48,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:48,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243279211] [2021-12-22 13:12:48,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243279211] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:48,690 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:12:48,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 13:12:48,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364357240] [2021-12-22 13:12:48,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:48,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 13:12:48,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:48,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 13:12:48,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-22 13:12:48,691 INFO L87 Difference]: Start difference. First operand 5465 states and 6723 transitions. Second operand has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-22 13:12:50,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:50,024 INFO L93 Difference]: Finished difference Result 9468 states and 11563 transitions. [2021-12-22 13:12:50,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-22 13:12:50,025 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 93 [2021-12-22 13:12:50,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:50,053 INFO L225 Difference]: With dead ends: 9468 [2021-12-22 13:12:50,053 INFO L226 Difference]: Without dead ends: 4875 [2021-12-22 13:12:50,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2021-12-22 13:12:50,075 INFO L933 BasicCegarLoop]: 486 mSDtfsCounter, 1444 mSDsluCounter, 1424 mSDsCounter, 0 mSdLazyCounter, 1275 mSolverCounterSat, 318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1483 SdHoareTripleChecker+Valid, 1910 SdHoareTripleChecker+Invalid, 1593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 1275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:50,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1483 Valid, 1910 Invalid, 1593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 1275 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-22 13:12:50,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4875 states. [2021-12-22 13:12:50,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4875 to 4541. [2021-12-22 13:12:50,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4541 states, 3534 states have (on average 1.2246745897000566) internal successors, (4328), 3601 states have internal predecessors, (4328), 487 states have call successors, (487), 397 states have call predecessors, (487), 518 states have return successors, (686), 549 states have call predecessors, (686), 484 states have call successors, (686) [2021-12-22 13:12:50,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4541 states to 4541 states and 5501 transitions. [2021-12-22 13:12:50,299 INFO L78 Accepts]: Start accepts. Automaton has 4541 states and 5501 transitions. Word has length 93 [2021-12-22 13:12:50,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:50,299 INFO L470 AbstractCegarLoop]: Abstraction has 4541 states and 5501 transitions. [2021-12-22 13:12:50,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-22 13:12:50,300 INFO L276 IsEmpty]: Start isEmpty. Operand 4541 states and 5501 transitions. [2021-12-22 13:12:50,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-22 13:12:50,302 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:50,303 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:12:50,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-22 13:12:50,303 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:50,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:50,303 INFO L85 PathProgramCache]: Analyzing trace with hash 299410466, now seen corresponding path program 1 times [2021-12-22 13:12:50,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:50,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488292102] [2021-12-22 13:12:50,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:50,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:50,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:50,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:50,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:50,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 13:12:50,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:50,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-22 13:12:50,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:50,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-22 13:12:50,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:50,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-22 13:12:50,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:50,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:12:50,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:50,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488292102] [2021-12-22 13:12:50,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488292102] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:50,368 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:12:50,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 13:12:50,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134870784] [2021-12-22 13:12:50,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:50,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 13:12:50,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:50,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 13:12:50,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 13:12:50,369 INFO L87 Difference]: Start difference. First operand 4541 states and 5501 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:12:51,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:51,145 INFO L93 Difference]: Finished difference Result 4805 states and 5917 transitions. [2021-12-22 13:12:51,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:12:51,146 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 3 states have internal predecessors, (91), 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 102 [2021-12-22 13:12:51,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:51,159 INFO L225 Difference]: With dead ends: 4805 [2021-12-22 13:12:51,159 INFO L226 Difference]: Without dead ends: 4606 [2021-12-22 13:12:51,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-22 13:12:51,162 INFO L933 BasicCegarLoop]: 473 mSDtfsCounter, 617 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 634 SdHoareTripleChecker+Valid, 893 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:51,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [634 Valid, 893 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 13:12:51,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4606 states. [2021-12-22 13:12:51,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4606 to 4541. [2021-12-22 13:12:51,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4541 states, 3534 states have (on average 1.2243916242218449) internal successors, (4327), 3601 states have internal predecessors, (4327), 487 states have call successors, (487), 397 states have call predecessors, (487), 518 states have return successors, (686), 549 states have call predecessors, (686), 484 states have call successors, (686) [2021-12-22 13:12:51,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4541 states to 4541 states and 5500 transitions. [2021-12-22 13:12:51,457 INFO L78 Accepts]: Start accepts. Automaton has 4541 states and 5500 transitions. Word has length 102 [2021-12-22 13:12:51,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:51,458 INFO L470 AbstractCegarLoop]: Abstraction has 4541 states and 5500 transitions. [2021-12-22 13:12:51,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:12:51,458 INFO L276 IsEmpty]: Start isEmpty. Operand 4541 states and 5500 transitions. [2021-12-22 13:12:51,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-22 13:12:51,461 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:51,461 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:12:51,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-22 13:12:51,462 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:51,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:51,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1577652764, now seen corresponding path program 1 times [2021-12-22 13:12:51,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:51,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328079060] [2021-12-22 13:12:51,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:51,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:51,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:51,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:51,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:51,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 13:12:51,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:51,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-22 13:12:51,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:51,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-22 13:12:51,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:51,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-22 13:12:51,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:51,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:12:51,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:51,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328079060] [2021-12-22 13:12:51,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328079060] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:51,534 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:12:51,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 13:12:51,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339282448] [2021-12-22 13:12:51,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:51,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:12:51,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:51,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:12:51,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:12:51,535 INFO L87 Difference]: Start difference. First operand 4541 states and 5500 transitions. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:12:52,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:52,837 INFO L93 Difference]: Finished difference Result 5067 states and 6331 transitions. [2021-12-22 13:12:52,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 13:12:52,838 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 4 states have internal predecessors, (91), 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 102 [2021-12-22 13:12:52,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:52,849 INFO L225 Difference]: With dead ends: 5067 [2021-12-22 13:12:52,850 INFO L226 Difference]: Without dead ends: 4871 [2021-12-22 13:12:52,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:12:52,852 INFO L933 BasicCegarLoop]: 483 mSDtfsCounter, 986 mSDsluCounter, 741 mSDsCounter, 0 mSdLazyCounter, 1056 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1008 SdHoareTripleChecker+Valid, 1224 SdHoareTripleChecker+Invalid, 1192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 1056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:52,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1008 Valid, 1224 Invalid, 1192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 1056 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-22 13:12:52,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4871 states. [2021-12-22 13:12:53,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4871 to 4740. [2021-12-22 13:12:53,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4740 states, 3712 states have (on average 1.2408405172413792) internal successors, (4606), 3780 states have internal predecessors, (4606), 501 states have call successors, (501), 403 states have call predecessors, (501), 525 states have return successors, (703), 563 states have call predecessors, (703), 498 states have call successors, (703) [2021-12-22 13:12:53,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4740 states to 4740 states and 5810 transitions. [2021-12-22 13:12:53,072 INFO L78 Accepts]: Start accepts. Automaton has 4740 states and 5810 transitions. Word has length 102 [2021-12-22 13:12:53,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:53,073 INFO L470 AbstractCegarLoop]: Abstraction has 4740 states and 5810 transitions. [2021-12-22 13:12:53,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:12:53,073 INFO L276 IsEmpty]: Start isEmpty. Operand 4740 states and 5810 transitions. [2021-12-22 13:12:53,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-22 13:12:53,077 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:53,077 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:12:53,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-22 13:12:53,077 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:53,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:53,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1033499360, now seen corresponding path program 1 times [2021-12-22 13:12:53,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:53,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802501467] [2021-12-22 13:12:53,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:53,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:53,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:53,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:53,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:53,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 13:12:53,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:53,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-22 13:12:53,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:53,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-22 13:12:53,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:53,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-22 13:12:53,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:53,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:12:53,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:53,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802501467] [2021-12-22 13:12:53,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802501467] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:53,154 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:12:53,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:12:53,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94569133] [2021-12-22 13:12:53,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:53,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:12:53,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:53,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:12:53,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:12:53,156 INFO L87 Difference]: Start difference. First operand 4740 states and 5810 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:12:54,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:54,764 INFO L93 Difference]: Finished difference Result 5537 states and 7068 transitions. [2021-12-22 13:12:54,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 13:12:54,765 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 102 [2021-12-22 13:12:54,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:54,777 INFO L225 Difference]: With dead ends: 5537 [2021-12-22 13:12:54,777 INFO L226 Difference]: Without dead ends: 5142 [2021-12-22 13:12:54,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-22 13:12:54,781 INFO L933 BasicCegarLoop]: 638 mSDtfsCounter, 990 mSDsluCounter, 1317 mSDsCounter, 0 mSdLazyCounter, 1678 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1012 SdHoareTripleChecker+Valid, 1955 SdHoareTripleChecker+Invalid, 1788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 1678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:54,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1012 Valid, 1955 Invalid, 1788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 1678 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-22 13:12:54,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5142 states. [2021-12-22 13:12:55,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5142 to 4927. [2021-12-22 13:12:55,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4927 states, 3878 states have (on average 1.2534811758638473) internal successors, (4861), 3947 states have internal predecessors, (4861), 515 states have call successors, (515), 409 states have call predecessors, (515), 532 states have return successors, (719), 578 states have call predecessors, (719), 512 states have call successors, (719) [2021-12-22 13:12:55,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4927 states to 4927 states and 6095 transitions. [2021-12-22 13:12:55,064 INFO L78 Accepts]: Start accepts. Automaton has 4927 states and 6095 transitions. Word has length 102 [2021-12-22 13:12:55,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:55,064 INFO L470 AbstractCegarLoop]: Abstraction has 4927 states and 6095 transitions. [2021-12-22 13:12:55,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:12:55,065 INFO L276 IsEmpty]: Start isEmpty. Operand 4927 states and 6095 transitions. [2021-12-22 13:12:55,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-22 13:12:55,067 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:55,068 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:12:55,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-22 13:12:55,068 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:55,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:55,068 INFO L85 PathProgramCache]: Analyzing trace with hash -845631586, now seen corresponding path program 1 times [2021-12-22 13:12:55,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:55,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506549946] [2021-12-22 13:12:55,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:55,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:55,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:55,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:55,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:55,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 13:12:55,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:55,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-22 13:12:55,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:55,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-22 13:12:55,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:55,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-22 13:12:55,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:55,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:12:55,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:55,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506549946] [2021-12-22 13:12:55,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506549946] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:55,137 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:12:55,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:12:55,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554933252] [2021-12-22 13:12:55,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:55,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:12:55,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:55,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:12:55,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:12:55,140 INFO L87 Difference]: Start difference. First operand 4927 states and 6095 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:12:56,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:56,686 INFO L93 Difference]: Finished difference Result 6227 states and 8141 transitions. [2021-12-22 13:12:56,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 13:12:56,687 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 102 [2021-12-22 13:12:56,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:56,700 INFO L225 Difference]: With dead ends: 6227 [2021-12-22 13:12:56,700 INFO L226 Difference]: Without dead ends: 5645 [2021-12-22 13:12:56,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-22 13:12:56,704 INFO L933 BasicCegarLoop]: 631 mSDtfsCounter, 985 mSDsluCounter, 1313 mSDsCounter, 0 mSdLazyCounter, 1669 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1007 SdHoareTripleChecker+Valid, 1944 SdHoareTripleChecker+Invalid, 1780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:56,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1007 Valid, 1944 Invalid, 1780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1669 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-22 13:12:56,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5645 states. [2021-12-22 13:12:56,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5645 to 5304. [2021-12-22 13:12:56,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5304 states, 4213 states have (on average 1.2760503204367435) internal successors, (5376), 4284 states have internal predecessors, (5376), 543 states have call successors, (543), 421 states have call predecessors, (543), 546 states have return successors, (755), 608 states have call predecessors, (755), 540 states have call successors, (755) [2021-12-22 13:12:56,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5304 states to 5304 states and 6674 transitions. [2021-12-22 13:12:56,982 INFO L78 Accepts]: Start accepts. Automaton has 5304 states and 6674 transitions. Word has length 102 [2021-12-22 13:12:56,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:56,982 INFO L470 AbstractCegarLoop]: Abstraction has 5304 states and 6674 transitions. [2021-12-22 13:12:56,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:12:56,983 INFO L276 IsEmpty]: Start isEmpty. Operand 5304 states and 6674 transitions. [2021-12-22 13:12:56,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-22 13:12:56,986 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:56,986 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:12:56,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-22 13:12:56,986 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:56,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:56,987 INFO L85 PathProgramCache]: Analyzing trace with hash 479224608, now seen corresponding path program 1 times [2021-12-22 13:12:56,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:56,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135713904] [2021-12-22 13:12:56,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:56,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:56,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:57,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:57,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:57,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 13:12:57,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:57,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-22 13:12:57,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:57,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-22 13:12:57,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:57,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-22 13:12:57,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:57,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:12:57,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:57,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135713904] [2021-12-22 13:12:57,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135713904] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:57,050 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:12:57,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:12:57,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456697578] [2021-12-22 13:12:57,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:57,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:12:57,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:57,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:12:57,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:12:57,051 INFO L87 Difference]: Start difference. First operand 5304 states and 6674 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:12:58,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:58,691 INFO L93 Difference]: Finished difference Result 7566 states and 10220 transitions. [2021-12-22 13:12:58,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 13:12:58,691 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 102 [2021-12-22 13:12:58,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:58,712 INFO L225 Difference]: With dead ends: 7566 [2021-12-22 13:12:58,712 INFO L226 Difference]: Without dead ends: 6607 [2021-12-22 13:12:58,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-22 13:12:58,719 INFO L933 BasicCegarLoop]: 626 mSDtfsCounter, 984 mSDsluCounter, 1313 mSDsCounter, 0 mSdLazyCounter, 1661 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1006 SdHoareTripleChecker+Valid, 1939 SdHoareTripleChecker+Invalid, 1772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:58,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1006 Valid, 1939 Invalid, 1772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1661 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-22 13:12:58,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6607 states. [2021-12-22 13:12:59,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6607 to 6061. [2021-12-22 13:12:59,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6061 states, 4886 states have (on average 1.3119115841178879) internal successors, (6410), 4961 states have internal predecessors, (6410), 599 states have call successors, (599), 445 states have call predecessors, (599), 574 states have return successors, (833), 668 states have call predecessors, (833), 596 states have call successors, (833) [2021-12-22 13:12:59,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6061 states to 6061 states and 7842 transitions. [2021-12-22 13:12:59,080 INFO L78 Accepts]: Start accepts. Automaton has 6061 states and 7842 transitions. Word has length 102 [2021-12-22 13:12:59,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:59,080 INFO L470 AbstractCegarLoop]: Abstraction has 6061 states and 7842 transitions. [2021-12-22 13:12:59,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:12:59,080 INFO L276 IsEmpty]: Start isEmpty. Operand 6061 states and 7842 transitions. [2021-12-22 13:12:59,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-22 13:12:59,085 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:59,085 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:12:59,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-22 13:12:59,085 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:59,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:59,086 INFO L85 PathProgramCache]: Analyzing trace with hash 2045982558, now seen corresponding path program 1 times [2021-12-22 13:12:59,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:59,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757379335] [2021-12-22 13:12:59,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:59,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:59,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:59,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:59,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:59,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 13:12:59,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:59,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-22 13:12:59,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:59,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-22 13:12:59,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:59,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-22 13:12:59,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:59,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:12:59,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:59,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757379335] [2021-12-22 13:12:59,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757379335] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:59,185 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:12:59,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:12:59,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318952123] [2021-12-22 13:12:59,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:59,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:12:59,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:59,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:12:59,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:12:59,188 INFO L87 Difference]: Start difference. First operand 6061 states and 7842 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:13:00,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:13:00,827 INFO L93 Difference]: Finished difference Result 10245 states and 14398 transitions. [2021-12-22 13:13:00,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 13:13:00,827 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 102 [2021-12-22 13:13:00,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:13:00,866 INFO L225 Difference]: With dead ends: 10245 [2021-12-22 13:13:00,866 INFO L226 Difference]: Without dead ends: 8529 [2021-12-22 13:13:00,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-22 13:13:00,874 INFO L933 BasicCegarLoop]: 621 mSDtfsCounter, 983 mSDsluCounter, 1313 mSDsCounter, 0 mSdLazyCounter, 1653 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1005 SdHoareTripleChecker+Valid, 1934 SdHoareTripleChecker+Invalid, 1764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:13:00,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1005 Valid, 1934 Invalid, 1764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1653 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-22 13:13:00,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8529 states. [2021-12-22 13:13:01,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8529 to 7582. [2021-12-22 13:13:01,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7582 states, 6239 states have (on average 1.36047443500561) internal successors, (8488), 6322 states have internal predecessors, (8488), 711 states have call successors, (711), 493 states have call predecessors, (711), 630 states have return successors, (1007), 788 states have call predecessors, (1007), 708 states have call successors, (1007) [2021-12-22 13:13:01,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7582 states to 7582 states and 10206 transitions. [2021-12-22 13:13:01,230 INFO L78 Accepts]: Start accepts. Automaton has 7582 states and 10206 transitions. Word has length 102 [2021-12-22 13:13:01,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:13:01,231 INFO L470 AbstractCegarLoop]: Abstraction has 7582 states and 10206 transitions. [2021-12-22 13:13:01,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:13:01,231 INFO L276 IsEmpty]: Start isEmpty. Operand 7582 states and 10206 transitions. [2021-12-22 13:13:01,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-22 13:13:01,235 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:13:01,235 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:13:01,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-22 13:13:01,236 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:13:01,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:13:01,236 INFO L85 PathProgramCache]: Analyzing trace with hash 988144480, now seen corresponding path program 1 times [2021-12-22 13:13:01,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:13:01,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063757612] [2021-12-22 13:13:01,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:13:01,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:13:01,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:01,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:13:01,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:01,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 13:13:01,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:01,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-22 13:13:01,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:01,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-22 13:13:01,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:01,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-22 13:13:01,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:01,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:13:01,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:13:01,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063757612] [2021-12-22 13:13:01,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063757612] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:13:01,328 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:13:01,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:13:01,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913171437] [2021-12-22 13:13:01,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:13:01,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:13:01,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:13:01,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:13:01,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:13:01,329 INFO L87 Difference]: Start difference. First operand 7582 states and 10206 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:13:03,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:13:03,415 INFO L93 Difference]: Finished difference Result 16868 states and 24706 transitions. [2021-12-22 13:13:03,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-22 13:13:03,415 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 102 [2021-12-22 13:13:03,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:13:03,447 INFO L225 Difference]: With dead ends: 16868 [2021-12-22 13:13:03,450 INFO L226 Difference]: Without dead ends: 13631 [2021-12-22 13:13:03,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-22 13:13:03,467 INFO L933 BasicCegarLoop]: 702 mSDtfsCounter, 1035 mSDsluCounter, 1305 mSDsCounter, 0 mSdLazyCounter, 1899 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1056 SdHoareTripleChecker+Valid, 2007 SdHoareTripleChecker+Invalid, 2012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 1899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:13:03,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1056 Valid, 2007 Invalid, 2012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 1899 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-22 13:13:03,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13631 states. [2021-12-22 13:13:03,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13631 to 10591. [2021-12-22 13:13:03,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10591 states, 8928 states have (on average 1.4150985663082438) internal successors, (12634), 9027 states have internal predecessors, (12634), 919 states have call successors, (919), 589 states have call predecessors, (919), 742 states have return successors, (1393), 1012 states have call predecessors, (1393), 916 states have call successors, (1393) [2021-12-22 13:13:03,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10591 states to 10591 states and 14946 transitions. [2021-12-22 13:13:03,999 INFO L78 Accepts]: Start accepts. Automaton has 10591 states and 14946 transitions. Word has length 102 [2021-12-22 13:13:03,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:13:03,999 INFO L470 AbstractCegarLoop]: Abstraction has 10591 states and 14946 transitions. [2021-12-22 13:13:03,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:13:03,999 INFO L276 IsEmpty]: Start isEmpty. Operand 10591 states and 14946 transitions. [2021-12-22 13:13:04,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-22 13:13:04,007 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:13:04,007 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:13:04,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-22 13:13:04,007 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:13:04,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:13:04,008 INFO L85 PathProgramCache]: Analyzing trace with hash -154357986, now seen corresponding path program 1 times [2021-12-22 13:13:04,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:13:04,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861965721] [2021-12-22 13:13:04,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:13:04,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:13:04,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:04,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:13:04,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:04,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 13:13:04,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:04,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-22 13:13:04,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:04,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-22 13:13:04,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:04,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-22 13:13:04,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:04,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:13:04,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:13:04,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861965721] [2021-12-22 13:13:04,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861965721] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:13:04,069 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:13:04,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:13:04,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90484399] [2021-12-22 13:13:04,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:13:04,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:13:04,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:13:04,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:13:04,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:13:04,070 INFO L87 Difference]: Start difference. First operand 10591 states and 14946 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:13:06,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:13:06,453 INFO L93 Difference]: Finished difference Result 28323 states and 42824 transitions. [2021-12-22 13:13:06,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-22 13:13:06,454 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 102 [2021-12-22 13:13:06,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:13:06,513 INFO L225 Difference]: With dead ends: 28323 [2021-12-22 13:13:06,513 INFO L226 Difference]: Without dead ends: 22077 [2021-12-22 13:13:06,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-22 13:13:06,537 INFO L933 BasicCegarLoop]: 608 mSDtfsCounter, 1154 mSDsluCounter, 1302 mSDsCounter, 0 mSdLazyCounter, 1629 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1182 SdHoareTripleChecker+Valid, 1910 SdHoareTripleChecker+Invalid, 1745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:13:06,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1182 Valid, 1910 Invalid, 1745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1629 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-22 13:13:06,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22077 states. [2021-12-22 13:13:07,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22077 to 16272. [2021-12-22 13:13:07,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16272 states, 13985 states have (on average 1.4561315695387915) internal successors, (20364), 14116 states have internal predecessors, (20364), 1319 states have call successors, (1319), 781 states have call predecessors, (1319), 966 states have return successors, (2311), 1444 states have call predecessors, (2311), 1316 states have call successors, (2311) [2021-12-22 13:13:07,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16272 states to 16272 states and 23994 transitions. [2021-12-22 13:13:07,470 INFO L78 Accepts]: Start accepts. Automaton has 16272 states and 23994 transitions. Word has length 102 [2021-12-22 13:13:07,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:13:07,470 INFO L470 AbstractCegarLoop]: Abstraction has 16272 states and 23994 transitions. [2021-12-22 13:13:07,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:13:07,470 INFO L276 IsEmpty]: Start isEmpty. Operand 16272 states and 23994 transitions. [2021-12-22 13:13:07,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-22 13:13:07,481 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:13:07,481 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:13:07,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-22 13:13:07,482 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:13:07,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:13:07,482 INFO L85 PathProgramCache]: Analyzing trace with hash 85881760, now seen corresponding path program 1 times [2021-12-22 13:13:07,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:13:07,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216894437] [2021-12-22 13:13:07,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:13:07,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:13:07,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:07,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:13:07,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:07,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 13:13:07,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:07,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-22 13:13:07,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:07,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-22 13:13:07,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:07,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-22 13:13:07,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:07,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:13:07,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:13:07,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216894437] [2021-12-22 13:13:07,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216894437] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:13:07,557 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:13:07,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:13:07,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638653061] [2021-12-22 13:13:07,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:13:07,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:13:07,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:13:07,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:13:07,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:13:07,559 INFO L87 Difference]: Start difference. First operand 16272 states and 23994 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:13:11,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:13:11,062 INFO L93 Difference]: Finished difference Result 49682 states and 77006 transitions. [2021-12-22 13:13:11,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-22 13:13:11,063 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 102 [2021-12-22 13:13:11,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:13:11,175 INFO L225 Difference]: With dead ends: 49682 [2021-12-22 13:13:11,176 INFO L226 Difference]: Without dead ends: 37755 [2021-12-22 13:13:11,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-22 13:13:11,248 INFO L933 BasicCegarLoop]: 662 mSDtfsCounter, 1016 mSDsluCounter, 1305 mSDsCounter, 0 mSdLazyCounter, 1818 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1037 SdHoareTripleChecker+Valid, 1967 SdHoareTripleChecker+Invalid, 1934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-22 13:13:11,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1037 Valid, 1967 Invalid, 1934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1818 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-22 13:13:11,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37755 states. [2021-12-22 13:13:12,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37755 to 27921. [2021-12-22 13:13:12,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27921 states, 24418 states have (on average 1.4919321811778197) internal successors, (36430), 24613 states have internal predecessors, (36430), 2087 states have call successors, (2087), 1165 states have call predecessors, (2087), 1414 states have return successors, (4601), 2276 states have call predecessors, (4601), 2084 states have call successors, (4601) [2021-12-22 13:13:12,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27921 states to 27921 states and 43118 transitions. [2021-12-22 13:13:12,926 INFO L78 Accepts]: Start accepts. Automaton has 27921 states and 43118 transitions. Word has length 102 [2021-12-22 13:13:12,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:13:12,927 INFO L470 AbstractCegarLoop]: Abstraction has 27921 states and 43118 transitions. [2021-12-22 13:13:12,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:13:12,927 INFO L276 IsEmpty]: Start isEmpty. Operand 27921 states and 43118 transitions. [2021-12-22 13:13:12,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-22 13:13:12,944 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:13:12,944 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:13:12,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-22 13:13:12,945 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:13:12,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:13:12,945 INFO L85 PathProgramCache]: Analyzing trace with hash 924915422, now seen corresponding path program 1 times [2021-12-22 13:13:12,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:13:12,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027359893] [2021-12-22 13:13:12,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:13:12,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:13:12,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:12,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:13:12,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:12,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 13:13:12,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:12,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-22 13:13:13,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:13,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-22 13:13:13,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:13,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-22 13:13:13,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:13,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:13:13,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:13:13,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027359893] [2021-12-22 13:13:13,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027359893] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:13:13,011 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:13:13,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:13:13,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074892810] [2021-12-22 13:13:13,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:13:13,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:13:13,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:13:13,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:13:13,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:13:13,012 INFO L87 Difference]: Start difference. First operand 27921 states and 43118 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:13:18,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:13:18,042 INFO L93 Difference]: Finished difference Result 90191 states and 144272 transitions. [2021-12-22 13:13:18,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-22 13:13:18,042 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 102 [2021-12-22 13:13:18,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:13:18,270 INFO L225 Difference]: With dead ends: 90191 [2021-12-22 13:13:18,271 INFO L226 Difference]: Without dead ends: 66615 [2021-12-22 13:13:18,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-22 13:13:18,342 INFO L933 BasicCegarLoop]: 593 mSDtfsCounter, 1035 mSDsluCounter, 1305 mSDsCounter, 0 mSdLazyCounter, 1601 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1063 SdHoareTripleChecker+Valid, 1898 SdHoareTripleChecker+Invalid, 1720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 1601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:13:18,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1063 Valid, 1898 Invalid, 1720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 1601 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-22 13:13:18,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66615 states. [2021-12-22 13:13:21,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66615 to 51283. [2021-12-22 13:13:21,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51283 states, 45412 states have (on average 1.5168237470272175) internal successors, (68882), 45735 states have internal predecessors, (68882), 3559 states have call successors, (3559), 1933 states have call predecessors, (3559), 2310 states have return successors, (10575), 3876 states have call predecessors, (10575), 3556 states have call successors, (10575) [2021-12-22 13:13:21,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51283 states to 51283 states and 83016 transitions. [2021-12-22 13:13:21,842 INFO L78 Accepts]: Start accepts. Automaton has 51283 states and 83016 transitions. Word has length 102 [2021-12-22 13:13:21,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:13:21,842 INFO L470 AbstractCegarLoop]: Abstraction has 51283 states and 83016 transitions. [2021-12-22 13:13:21,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:13:21,842 INFO L276 IsEmpty]: Start isEmpty. Operand 51283 states and 83016 transitions. [2021-12-22 13:13:21,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-22 13:13:21,921 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:13:21,921 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:13:21,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-22 13:13:21,922 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:13:21,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:13:21,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1152421476, now seen corresponding path program 1 times [2021-12-22 13:13:21,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:13:21,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261337257] [2021-12-22 13:13:21,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:13:21,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:13:21,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:21,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:13:21,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:21,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 13:13:21,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:21,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-22 13:13:21,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:21,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-22 13:13:22,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:22,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-22 13:13:22,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:22,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:13:22,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:13:22,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261337257] [2021-12-22 13:13:22,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261337257] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:13:22,004 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:13:22,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:13:22,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426046322] [2021-12-22 13:13:22,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:13:22,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:13:22,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:13:22,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:13:22,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:13:22,006 INFO L87 Difference]: Start difference. First operand 51283 states and 83016 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:13:31,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:13:31,056 INFO L93 Difference]: Finished difference Result 170895 states and 283944 transitions. [2021-12-22 13:13:31,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-22 13:13:31,057 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 102 [2021-12-22 13:13:31,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:13:31,577 INFO L225 Difference]: With dead ends: 170895 [2021-12-22 13:13:31,578 INFO L226 Difference]: Without dead ends: 123957 [2021-12-22 13:13:31,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-22 13:13:31,729 INFO L933 BasicCegarLoop]: 601 mSDtfsCounter, 980 mSDsluCounter, 1305 mSDsCounter, 0 mSdLazyCounter, 1684 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1001 SdHoareTripleChecker+Valid, 1906 SdHoareTripleChecker+Invalid, 1798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:13:31,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1001 Valid, 1906 Invalid, 1798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1684 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-22 13:13:31,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123957 states.