./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.07.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.07.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 d7b83251f9a608d2befdac3ab06beaba9889f30d8ab1cb865fc88ebdabcb52dd --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 16:18:28,865 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 16:18:28,892 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 16:18:28,922 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 16:18:28,922 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 16:18:28,926 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 16:18:28,928 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 16:18:28,933 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 16:18:28,934 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 16:18:28,939 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 16:18:28,940 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 16:18:28,941 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 16:18:28,942 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 16:18:28,944 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 16:18:28,945 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 16:18:28,948 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 16:18:28,949 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 16:18:28,950 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 16:18:28,953 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 16:18:28,955 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 16:18:28,957 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 16:18:28,958 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 16:18:28,959 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 16:18:28,960 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 16:18:28,963 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 16:18:28,964 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 16:18:28,965 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 16:18:28,966 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 16:18:28,966 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 16:18:28,967 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 16:18:28,967 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 16:18:28,967 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 16:18:28,968 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 16:18:28,969 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 16:18:28,970 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 16:18:28,970 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 16:18:28,971 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 16:18:28,971 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 16:18:28,971 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 16:18:28,971 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 16:18:28,972 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 16:18:28,973 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 16:18:28,997 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 16:18:28,997 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 16:18:28,998 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 16:18:28,998 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 16:18:28,998 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 16:18:28,999 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 16:18:28,999 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 16:18:28,999 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 16:18:28,999 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 16:18:29,000 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 16:18:29,000 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 16:18:29,000 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 16:18:29,000 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 16:18:29,001 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 16:18:29,001 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 16:18:29,001 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 16:18:29,001 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 16:18:29,001 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 16:18:29,001 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 16:18:29,001 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 16:18:29,002 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 16:18:29,002 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 16:18:29,002 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 16:18:29,002 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 16:18:29,002 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:18:29,002 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 16:18:29,002 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 16:18:29,003 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 16:18:29,003 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 16:18:29,003 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 16:18:29,004 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 16:18:29,004 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 16:18:29,004 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 16:18:29,004 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 16:18:29,004 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d7b83251f9a608d2befdac3ab06beaba9889f30d8ab1cb865fc88ebdabcb52dd [2021-12-14 16:18:29,220 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 16:18:29,243 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 16:18:29,245 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 16:18:29,246 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 16:18:29,247 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 16:18:29,248 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.07.cil-2.c [2021-12-14 16:18:29,299 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f2953d7d/5fe8fed00ed4446893e0f11ef9d33798/FLAG40336dcaf [2021-12-14 16:18:29,711 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 16:18:29,712 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.07.cil-2.c [2021-12-14 16:18:29,734 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f2953d7d/5fe8fed00ed4446893e0f11ef9d33798/FLAG40336dcaf [2021-12-14 16:18:29,745 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f2953d7d/5fe8fed00ed4446893e0f11ef9d33798 [2021-12-14 16:18:29,746 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 16:18:29,747 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 16:18:29,754 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 16:18:29,754 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 16:18:29,757 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 16:18:29,757 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:18:29" (1/1) ... [2021-12-14 16:18:29,758 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7df7eea7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:18:29, skipping insertion in model container [2021-12-14 16:18:29,758 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:18:29" (1/1) ... [2021-12-14 16:18:29,763 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 16:18:29,791 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 16:18:29,911 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.07.cil-2.c[914,927] [2021-12-14 16:18:29,939 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.07.cil-2.c[7115,7128] [2021-12-14 16:18:29,980 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:18:29,987 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 16:18:29,994 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.07.cil-2.c[914,927] [2021-12-14 16:18:30,006 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.07.cil-2.c[7115,7128] [2021-12-14 16:18:30,035 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:18:30,049 INFO L208 MainTranslator]: Completed translation [2021-12-14 16:18:30,050 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:18:30 WrapperNode [2021-12-14 16:18:30,050 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 16:18:30,051 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 16:18:30,051 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 16:18:30,051 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 16:18:30,056 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:18:30" (1/1) ... [2021-12-14 16:18:30,065 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:18:30" (1/1) ... [2021-12-14 16:18:30,090 INFO L137 Inliner]: procedures = 67, calls = 79, calls flagged for inlining = 35, calls inlined = 35, statements flattened = 755 [2021-12-14 16:18:30,091 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 16:18:30,091 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 16:18:30,091 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 16:18:30,092 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 16:18:30,097 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:18:30" (1/1) ... [2021-12-14 16:18:30,098 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:18:30" (1/1) ... [2021-12-14 16:18:30,101 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:18:30" (1/1) ... [2021-12-14 16:18:30,101 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:18:30" (1/1) ... [2021-12-14 16:18:30,109 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:18:30" (1/1) ... [2021-12-14 16:18:30,135 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:18:30" (1/1) ... [2021-12-14 16:18:30,137 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:18:30" (1/1) ... [2021-12-14 16:18:30,150 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 16:18:30,151 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 16:18:30,151 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 16:18:30,151 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 16:18:30,152 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:18:30" (1/1) ... [2021-12-14 16:18:30,157 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:18:30,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:18:30,176 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-14 16:18:30,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-14 16:18:30,209 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 16:18:30,210 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-14 16:18:30,210 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-14 16:18:30,210 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2021-12-14 16:18:30,210 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2021-12-14 16:18:30,210 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-14 16:18:30,210 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-14 16:18:30,210 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-14 16:18:30,210 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-14 16:18:30,211 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2021-12-14 16:18:30,211 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2021-12-14 16:18:30,211 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-14 16:18:30,211 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-14 16:18:30,211 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-14 16:18:30,211 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-14 16:18:30,211 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2021-12-14 16:18:30,211 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2021-12-14 16:18:30,212 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2021-12-14 16:18:30,212 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2021-12-14 16:18:30,212 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2021-12-14 16:18:30,212 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2021-12-14 16:18:30,212 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-14 16:18:30,212 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-14 16:18:30,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 16:18:30,212 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-14 16:18:30,212 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-14 16:18:30,213 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2021-12-14 16:18:30,213 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2021-12-14 16:18:30,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 16:18:30,213 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 16:18:30,213 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-14 16:18:30,213 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-14 16:18:30,213 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2021-12-14 16:18:30,213 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2021-12-14 16:18:30,284 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 16:18:30,303 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 16:18:30,845 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 16:18:30,853 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 16:18:30,853 INFO L301 CfgBuilder]: Removed 14 assume(true) statements. [2021-12-14 16:18:30,855 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:18:30 BoogieIcfgContainer [2021-12-14 16:18:30,855 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 16:18:30,856 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 16:18:30,856 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 16:18:30,859 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 16:18:30,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 04:18:29" (1/3) ... [2021-12-14 16:18:30,859 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fa97168 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:18:30, skipping insertion in model container [2021-12-14 16:18:30,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:18:30" (2/3) ... [2021-12-14 16:18:30,860 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fa97168 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:18:30, skipping insertion in model container [2021-12-14 16:18:30,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:18:30" (3/3) ... [2021-12-14 16:18:30,861 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.07.cil-2.c [2021-12-14 16:18:30,865 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 16:18:30,865 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-14 16:18:30,898 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 16:18:30,902 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-14 16:18:30,902 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-14 16:18:30,930 INFO L276 IsEmpty]: Start isEmpty. Operand has 366 states, 311 states have (on average 1.6205787781350482) internal successors, (504), 319 states have internal predecessors, (504), 37 states have call successors, (37), 15 states have call predecessors, (37), 15 states have return successors, (37), 35 states have call predecessors, (37), 37 states have call successors, (37) [2021-12-14 16:18:30,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-14 16:18:30,940 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:18:30,941 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] [2021-12-14 16:18:30,941 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:18:30,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:18:30,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1360309696, now seen corresponding path program 1 times [2021-12-14 16:18:30,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:18:30,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193599994] [2021-12-14 16:18:30,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:18:30,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:18:31,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:31,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:18:31,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:31,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:18:31,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:31,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:18:31,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:31,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:18:31,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:31,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:18:31,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:31,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:18:31,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:31,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 16:18:31,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:31,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:18:31,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:18:31,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193599994] [2021-12-14 16:18:31,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193599994] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:18:31,261 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:18:31,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 16:18:31,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083872731] [2021-12-14 16:18:31,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:18:31,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:18:31,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:18:31,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:18:31,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:18:31,292 INFO L87 Difference]: Start difference. First operand has 366 states, 311 states have (on average 1.6205787781350482) internal successors, (504), 319 states have internal predecessors, (504), 37 states have call successors, (37), 15 states have call predecessors, (37), 15 states have return successors, (37), 35 states have call predecessors, (37), 37 states have call successors, (37) 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) [2021-12-14 16:18:31,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:18:31,871 INFO L93 Difference]: Finished difference Result 727 states and 1147 transitions. [2021-12-14 16:18:31,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 16:18:31,875 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 [2021-12-14 16:18:31,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:18:31,884 INFO L225 Difference]: With dead ends: 727 [2021-12-14 16:18:31,884 INFO L226 Difference]: Without dead ends: 373 [2021-12-14 16:18:31,888 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 [2021-12-14 16:18:31,890 INFO L933 BasicCegarLoop]: 540 mSDtfsCounter, 549 mSDsluCounter, 980 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 1520 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 16:18:31,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [559 Valid, 1520 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 16:18:31,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-12-14 16:18:31,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 355. [2021-12-14 16:18:31,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 303 states have (on average 1.528052805280528) internal successors, (463), 308 states have internal predecessors, (463), 37 states have call successors, (37), 15 states have call predecessors, (37), 13 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2021-12-14 16:18:31,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 533 transitions. [2021-12-14 16:18:31,939 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 533 transitions. Word has length 65 [2021-12-14 16:18:31,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:18:31,940 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 533 transitions. [2021-12-14 16:18:31,940 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) [2021-12-14 16:18:31,940 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 533 transitions. [2021-12-14 16:18:31,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-14 16:18:31,943 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:18:31,943 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] [2021-12-14 16:18:31,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 16:18:31,943 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:18:31,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:18:31,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1400984446, now seen corresponding path program 1 times [2021-12-14 16:18:31,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:18:31,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223563927] [2021-12-14 16:18:31,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:18:31,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:18:31,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:31,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:18:31,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:31,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:18:31,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:32,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:18:32,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:32,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:18:32,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:32,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:18:32,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:32,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:18:32,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:32,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 16:18:32,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:32,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:18:32,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:18:32,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223563927] [2021-12-14 16:18:32,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223563927] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:18:32,049 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:18:32,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 16:18:32,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024278179] [2021-12-14 16:18:32,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:18:32,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 16:18:32,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:18:32,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 16:18:32,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:18:32,052 INFO L87 Difference]: Start difference. First operand 355 states and 533 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) [2021-12-14 16:18:32,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:18:32,707 INFO L93 Difference]: Finished difference Result 578 states and 847 transitions. [2021-12-14 16:18:32,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:18:32,707 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 [2021-12-14 16:18:32,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:18:32,710 INFO L225 Difference]: With dead ends: 578 [2021-12-14 16:18:32,711 INFO L226 Difference]: Without dead ends: 490 [2021-12-14 16:18:32,711 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 [2021-12-14 16:18:32,712 INFO L933 BasicCegarLoop]: 537 mSDtfsCounter, 899 mSDsluCounter, 1038 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 905 SdHoareTripleChecker+Valid, 1575 SdHoareTripleChecker+Invalid, 956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-14 16:18:32,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [905 Valid, 1575 Invalid, 956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 768 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-14 16:18:32,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-12-14 16:18:32,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 451. [2021-12-14 16:18:32,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 379 states have (on average 1.4960422163588392) internal successors, (567), 386 states have internal predecessors, (567), 48 states have call successors, (48), 22 states have call predecessors, (48), 22 states have return successors, (49), 45 states have call predecessors, (49), 44 states have call successors, (49) [2021-12-14 16:18:32,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 664 transitions. [2021-12-14 16:18:32,738 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 664 transitions. Word has length 65 [2021-12-14 16:18:32,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:18:32,739 INFO L470 AbstractCegarLoop]: Abstraction has 451 states and 664 transitions. [2021-12-14 16:18:32,739 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) [2021-12-14 16:18:32,739 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 664 transitions. [2021-12-14 16:18:32,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-14 16:18:32,741 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:18:32,741 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] [2021-12-14 16:18:32,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 16:18:32,741 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:18:32,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:18:32,742 INFO L85 PathProgramCache]: Analyzing trace with hash -997198495, now seen corresponding path program 1 times [2021-12-14 16:18:32,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:18:32,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409270942] [2021-12-14 16:18:32,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:18:32,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:18:32,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:32,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:18:32,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:32,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:18:32,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:32,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:18:32,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:32,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:18:32,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:32,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:18:32,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:32,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:18:32,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:32,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 16:18:32,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:32,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:18:32,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:18:32,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409270942] [2021-12-14 16:18:32,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409270942] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:18:32,825 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:18:32,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 16:18:32,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143585872] [2021-12-14 16:18:32,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:18:32,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 16:18:32,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:18:32,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 16:18:32,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:18:32,827 INFO L87 Difference]: Start difference. First operand 451 states and 664 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) [2021-12-14 16:18:33,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:18:33,561 INFO L93 Difference]: Finished difference Result 798 states and 1140 transitions. [2021-12-14 16:18:33,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-14 16:18:33,562 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 [2021-12-14 16:18:33,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:18:33,565 INFO L225 Difference]: With dead ends: 798 [2021-12-14 16:18:33,565 INFO L226 Difference]: Without dead ends: 621 [2021-12-14 16:18:33,566 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 [2021-12-14 16:18:33,566 INFO L933 BasicCegarLoop]: 581 mSDtfsCounter, 1091 mSDsluCounter, 1530 mSDsCounter, 0 mSdLazyCounter, 1050 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1119 SdHoareTripleChecker+Valid, 2111 SdHoareTripleChecker+Invalid, 1186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 1050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-14 16:18:33,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1119 Valid, 2111 Invalid, 1186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 1050 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-14 16:18:33,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2021-12-14 16:18:33,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 547. [2021-12-14 16:18:33,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 455 states have (on average 1.4725274725274726) internal successors, (670), 464 states have internal predecessors, (670), 59 states have call successors, (59), 29 states have call predecessors, (59), 31 states have return successors, (68), 57 states have call predecessors, (68), 55 states have call successors, (68) [2021-12-14 16:18:33,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 797 transitions. [2021-12-14 16:18:33,592 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 797 transitions. Word has length 65 [2021-12-14 16:18:33,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:18:33,592 INFO L470 AbstractCegarLoop]: Abstraction has 547 states and 797 transitions. [2021-12-14 16:18:33,592 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) [2021-12-14 16:18:33,592 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 797 transitions. [2021-12-14 16:18:33,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-14 16:18:33,594 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:18:33,595 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] [2021-12-14 16:18:33,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 16:18:33,595 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:18:33,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:18:33,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1269182691, now seen corresponding path program 1 times [2021-12-14 16:18:33,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:18:33,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423873810] [2021-12-14 16:18:33,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:18:33,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:18:33,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:33,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:18:33,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:33,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:18:33,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:33,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:18:33,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:33,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:18:33,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:33,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:18:33,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:33,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:18:33,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:33,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 16:18:33,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:33,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:18:33,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:18:33,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423873810] [2021-12-14 16:18:33,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423873810] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:18:33,687 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:18:33,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-14 16:18:33,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285964426] [2021-12-14 16:18:33,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:18:33,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 16:18:33,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:18:33,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 16:18:33,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:18:33,688 INFO L87 Difference]: Start difference. First operand 547 states and 797 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) [2021-12-14 16:18:34,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:18:34,275 INFO L93 Difference]: Finished difference Result 874 states and 1251 transitions. [2021-12-14 16:18:34,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-14 16:18:34,276 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 [2021-12-14 16:18:34,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:18:34,281 INFO L225 Difference]: With dead ends: 874 [2021-12-14 16:18:34,281 INFO L226 Difference]: Without dead ends: 607 [2021-12-14 16:18:34,282 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 [2021-12-14 16:18:34,288 INFO L933 BasicCegarLoop]: 522 mSDtfsCounter, 669 mSDsluCounter, 1741 mSDsCounter, 0 mSdLazyCounter, 1051 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 671 SdHoareTripleChecker+Valid, 2263 SdHoareTripleChecker+Invalid, 1184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-14 16:18:34,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [671 Valid, 2263 Invalid, 1184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 1051 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-14 16:18:34,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-12-14 16:18:34,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 562. [2021-12-14 16:18:34,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 467 states have (on average 1.4603854389721627) internal successors, (682), 476 states have internal predecessors, (682), 59 states have call successors, (59), 29 states have call predecessors, (59), 34 states have return successors, (71), 60 states have call predecessors, (71), 55 states have call successors, (71) [2021-12-14 16:18:34,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 812 transitions. [2021-12-14 16:18:34,322 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 812 transitions. Word has length 65 [2021-12-14 16:18:34,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:18:34,322 INFO L470 AbstractCegarLoop]: Abstraction has 562 states and 812 transitions. [2021-12-14 16:18:34,322 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) [2021-12-14 16:18:34,322 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 812 transitions. [2021-12-14 16:18:34,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-14 16:18:34,324 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:18:34,324 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] [2021-12-14 16:18:34,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 16:18:34,325 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:18:34,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:18:34,325 INFO L85 PathProgramCache]: Analyzing trace with hash -117020703, now seen corresponding path program 1 times [2021-12-14 16:18:34,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:18:34,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022721852] [2021-12-14 16:18:34,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:18:34,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:18:34,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:34,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:18:34,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:34,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:18:34,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:34,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:18:34,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:34,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:18:34,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:34,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:18:34,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:34,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:18:34,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:34,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 16:18:34,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:34,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:18:34,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:18:34,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022721852] [2021-12-14 16:18:34,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022721852] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:18:34,445 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:18:34,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-14 16:18:34,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447481122] [2021-12-14 16:18:34,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:18:34,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 16:18:34,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:18:34,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 16:18:34,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:18:34,447 INFO L87 Difference]: Start difference. First operand 562 states and 812 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) [2021-12-14 16:18:35,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:18:35,113 INFO L93 Difference]: Finished difference Result 880 states and 1244 transitions. [2021-12-14 16:18:35,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-14 16:18:35,114 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 [2021-12-14 16:18:35,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:18:35,116 INFO L225 Difference]: With dead ends: 880 [2021-12-14 16:18:35,116 INFO L226 Difference]: Without dead ends: 598 [2021-12-14 16:18:35,117 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 [2021-12-14 16:18:35,117 INFO L933 BasicCegarLoop]: 521 mSDtfsCounter, 671 mSDsluCounter, 1737 mSDsCounter, 0 mSdLazyCounter, 1049 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 672 SdHoareTripleChecker+Valid, 2258 SdHoareTripleChecker+Invalid, 1181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 1049 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-14 16:18:35,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [672 Valid, 2258 Invalid, 1181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 1049 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-14 16:18:35,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-12-14 16:18:35,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 567. [2021-12-14 16:18:35,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 471 states have (on average 1.4522292993630572) internal successors, (684), 480 states have internal predecessors, (684), 59 states have call successors, (59), 29 states have call predecessors, (59), 35 states have return successors, (72), 61 states have call predecessors, (72), 55 states have call successors, (72) [2021-12-14 16:18:35,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 815 transitions. [2021-12-14 16:18:35,137 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 815 transitions. Word has length 65 [2021-12-14 16:18:35,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:18:35,137 INFO L470 AbstractCegarLoop]: Abstraction has 567 states and 815 transitions. [2021-12-14 16:18:35,137 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) [2021-12-14 16:18:35,137 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 815 transitions. [2021-12-14 16:18:35,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-14 16:18:35,138 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:18:35,138 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] [2021-12-14 16:18:35,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 16:18:35,139 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:18:35,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:18:35,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1146380001, now seen corresponding path program 1 times [2021-12-14 16:18:35,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:18:35,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311789793] [2021-12-14 16:18:35,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:18:35,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:18:35,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:35,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:18:35,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:35,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:18:35,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:35,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:18:35,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:35,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:18:35,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:35,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:18:35,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:35,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:18:35,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:35,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 16:18:35,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:35,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:18:35,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:18:35,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311789793] [2021-12-14 16:18:35,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311789793] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:18:35,222 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:18:35,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 16:18:35,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814266938] [2021-12-14 16:18:35,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:18:35,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:18:35,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:18:35,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:18:35,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:18:35,223 INFO L87 Difference]: Start difference. First operand 567 states and 815 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-14 16:18:36,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:18:36,422 INFO L93 Difference]: Finished difference Result 1923 states and 2656 transitions. [2021-12-14 16:18:36,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-14 16:18:36,423 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 65 [2021-12-14 16:18:36,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:18:36,428 INFO L225 Difference]: With dead ends: 1923 [2021-12-14 16:18:36,428 INFO L226 Difference]: Without dead ends: 1618 [2021-12-14 16:18:36,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2021-12-14 16:18:36,431 INFO L933 BasicCegarLoop]: 626 mSDtfsCounter, 3092 mSDsluCounter, 1445 mSDsCounter, 0 mSdLazyCounter, 1396 mSolverCounterSat, 675 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3107 SdHoareTripleChecker+Valid, 2071 SdHoareTripleChecker+Invalid, 2071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 675 IncrementalHoareTripleChecker+Valid, 1396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-14 16:18:36,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3107 Valid, 2071 Invalid, 2071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [675 Valid, 1396 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-14 16:18:36,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1618 states. [2021-12-14 16:18:36,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1618 to 1483. [2021-12-14 16:18:36,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1483 states, 1198 states have (on average 1.3664440734557597) internal successors, (1637), 1222 states have internal predecessors, (1637), 147 states have call successors, (147), 112 states have call predecessors, (147), 136 states have return successors, (189), 151 states have call predecessors, (189), 143 states have call successors, (189) [2021-12-14 16:18:36,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1483 states to 1483 states and 1973 transitions. [2021-12-14 16:18:36,503 INFO L78 Accepts]: Start accepts. Automaton has 1483 states and 1973 transitions. Word has length 65 [2021-12-14 16:18:36,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:18:36,504 INFO L470 AbstractCegarLoop]: Abstraction has 1483 states and 1973 transitions. [2021-12-14 16:18:36,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-14 16:18:36,505 INFO L276 IsEmpty]: Start isEmpty. Operand 1483 states and 1973 transitions. [2021-12-14 16:18:36,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-14 16:18:36,505 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:18:36,506 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] [2021-12-14 16:18:36,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 16:18:36,506 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:18:36,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:18:36,506 INFO L85 PathProgramCache]: Analyzing trace with hash -166967177, now seen corresponding path program 1 times [2021-12-14 16:18:36,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:18:36,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075777495] [2021-12-14 16:18:36,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:18:36,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:18:36,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:36,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:18:36,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:36,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:18:36,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:36,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:18:36,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:36,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:18:36,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:36,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:18:36,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:36,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:18:36,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:36,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 16:18:36,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:36,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:18:36,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:18:36,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075777495] [2021-12-14 16:18:36,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075777495] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:18:36,599 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:18:36,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 16:18:36,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993830159] [2021-12-14 16:18:36,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:18:36,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 16:18:36,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:18:36,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 16:18:36,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:18:36,600 INFO L87 Difference]: Start difference. First operand 1483 states and 1973 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) [2021-12-14 16:18:37,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:18:37,330 INFO L93 Difference]: Finished difference Result 2762 states and 3559 transitions. [2021-12-14 16:18:37,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-14 16:18:37,331 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 [2021-12-14 16:18:37,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:18:37,338 INFO L225 Difference]: With dead ends: 2762 [2021-12-14 16:18:37,338 INFO L226 Difference]: Without dead ends: 1770 [2021-12-14 16:18:37,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-12-14 16:18:37,340 INFO L933 BasicCegarLoop]: 529 mSDtfsCounter, 1043 mSDsluCounter, 1307 mSDsCounter, 0 mSdLazyCounter, 1007 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1067 SdHoareTripleChecker+Valid, 1836 SdHoareTripleChecker+Invalid, 1146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 1007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-14 16:18:37,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1067 Valid, 1836 Invalid, 1146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 1007 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-14 16:18:37,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1770 states. [2021-12-14 16:18:37,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1770 to 1425. [2021-12-14 16:18:37,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1425 states, 1156 states have (on average 1.3624567474048443) internal successors, (1575), 1175 states have internal predecessors, (1575), 141 states have call successors, (141), 107 states have call predecessors, (141), 126 states have return successors, (174), 144 states have call predecessors, (174), 137 states have call successors, (174) [2021-12-14 16:18:37,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1425 states to 1425 states and 1890 transitions. [2021-12-14 16:18:37,384 INFO L78 Accepts]: Start accepts. Automaton has 1425 states and 1890 transitions. Word has length 65 [2021-12-14 16:18:37,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:18:37,384 INFO L470 AbstractCegarLoop]: Abstraction has 1425 states and 1890 transitions. [2021-12-14 16:18:37,384 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) [2021-12-14 16:18:37,384 INFO L276 IsEmpty]: Start isEmpty. Operand 1425 states and 1890 transitions. [2021-12-14 16:18:37,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-14 16:18:37,385 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:18:37,385 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] [2021-12-14 16:18:37,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 16:18:37,386 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:18:37,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:18:37,386 INFO L85 PathProgramCache]: Analyzing trace with hash -300980683, now seen corresponding path program 1 times [2021-12-14 16:18:37,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:18:37,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704943806] [2021-12-14 16:18:37,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:18:37,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:18:37,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:37,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:18:37,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:37,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:18:37,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:37,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:18:37,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:37,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:18:37,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:37,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:18:37,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:37,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:18:37,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:37,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 16:18:37,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:37,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:18:37,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:18:37,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704943806] [2021-12-14 16:18:37,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704943806] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:18:37,444 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:18:37,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:18:37,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964743768] [2021-12-14 16:18:37,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:18:37,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:18:37,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:18:37,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:18:37,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:18:37,446 INFO L87 Difference]: Start difference. First operand 1425 states and 1890 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) [2021-12-14 16:18:37,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:18:37,778 INFO L93 Difference]: Finished difference Result 3787 states and 4887 transitions. [2021-12-14 16:18:37,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-14 16:18:37,778 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 [2021-12-14 16:18:37,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:18:37,786 INFO L225 Difference]: With dead ends: 3787 [2021-12-14 16:18:37,786 INFO L226 Difference]: Without dead ends: 2631 [2021-12-14 16:18:37,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-12-14 16:18:37,789 INFO L933 BasicCegarLoop]: 498 mSDtfsCounter, 1530 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1558 SdHoareTripleChecker+Valid, 1028 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 16:18:37,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1558 Valid, 1028 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 16:18:37,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2631 states. [2021-12-14 16:18:37,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2631 to 2483. [2021-12-14 16:18:37,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2483 states, 1974 states have (on average 1.3034447821681865) internal successors, (2573), 2009 states have internal predecessors, (2573), 257 states have call successors, (257), 206 states have call predecessors, (257), 250 states have return successors, (362), 269 states have call predecessors, (362), 253 states have call successors, (362) [2021-12-14 16:18:37,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2483 states to 2483 states and 3192 transitions. [2021-12-14 16:18:37,862 INFO L78 Accepts]: Start accepts. Automaton has 2483 states and 3192 transitions. Word has length 65 [2021-12-14 16:18:37,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:18:37,862 INFO L470 AbstractCegarLoop]: Abstraction has 2483 states and 3192 transitions. [2021-12-14 16:18:37,862 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) [2021-12-14 16:18:37,862 INFO L276 IsEmpty]: Start isEmpty. Operand 2483 states and 3192 transitions. [2021-12-14 16:18:37,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-14 16:18:37,863 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:18:37,863 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] [2021-12-14 16:18:37,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 16:18:37,863 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:18:37,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:18:37,863 INFO L85 PathProgramCache]: Analyzing trace with hash -57595364, now seen corresponding path program 1 times [2021-12-14 16:18:37,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:18:37,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212204681] [2021-12-14 16:18:37,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:18:37,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:18:37,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:37,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:18:37,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:37,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:18:37,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:37,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:18:37,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:37,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:18:37,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:37,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:18:37,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:37,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:18:37,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:37,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 16:18:37,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:37,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:18:37,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:18:37,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212204681] [2021-12-14 16:18:37,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212204681] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:18:37,913 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:18:37,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 16:18:37,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170029946] [2021-12-14 16:18:37,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:18:37,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:18:37,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:18:37,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:18:37,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:18:37,914 INFO L87 Difference]: Start difference. First operand 2483 states and 3192 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) [2021-12-14 16:18:38,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:18:38,405 INFO L93 Difference]: Finished difference Result 5763 states and 7313 transitions. [2021-12-14 16:18:38,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 16:18:38,405 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 [2021-12-14 16:18:38,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:18:38,419 INFO L225 Difference]: With dead ends: 5763 [2021-12-14 16:18:38,419 INFO L226 Difference]: Without dead ends: 3549 [2021-12-14 16:18:38,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:18:38,427 INFO L933 BasicCegarLoop]: 528 mSDtfsCounter, 877 mSDsluCounter, 759 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 886 SdHoareTripleChecker+Valid, 1287 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 16:18:38,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [886 Valid, 1287 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 16:18:38,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3549 states. [2021-12-14 16:18:38,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3549 to 3253. [2021-12-14 16:18:38,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3253 states, 2573 states have (on average 1.2883793237465992) internal successors, (3315), 2613 states have internal predecessors, (3315), 341 states have call successors, (341), 279 states have call predecessors, (341), 337 states have return successors, (466), 362 states have call predecessors, (466), 337 states have call successors, (466) [2021-12-14 16:18:38,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3253 states to 3253 states and 4122 transitions. [2021-12-14 16:18:38,564 INFO L78 Accepts]: Start accepts. Automaton has 3253 states and 4122 transitions. Word has length 66 [2021-12-14 16:18:38,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:18:38,565 INFO L470 AbstractCegarLoop]: Abstraction has 3253 states and 4122 transitions. [2021-12-14 16:18:38,565 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) [2021-12-14 16:18:38,565 INFO L276 IsEmpty]: Start isEmpty. Operand 3253 states and 4122 transitions. [2021-12-14 16:18:38,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-14 16:18:38,565 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:18:38,566 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] [2021-12-14 16:18:38,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-14 16:18:38,566 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:18:38,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:18:38,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1644831941, now seen corresponding path program 1 times [2021-12-14 16:18:38,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:18:38,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527931596] [2021-12-14 16:18:38,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:18:38,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:18:38,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:38,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:18:38,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:38,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:18:38,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:38,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:18:38,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:38,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:18:38,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:38,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:18:38,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:38,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:18:38,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:38,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 16:18:38,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:38,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:18:38,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:18:38,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527931596] [2021-12-14 16:18:38,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527931596] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:18:38,618 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:18:38,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 16:18:38,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961894340] [2021-12-14 16:18:38,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:18:38,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:18:38,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:18:38,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:18:38,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:18:38,619 INFO L87 Difference]: Start difference. First operand 3253 states and 4122 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) [2021-12-14 16:18:38,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:18:38,952 INFO L93 Difference]: Finished difference Result 6797 states and 8495 transitions. [2021-12-14 16:18:38,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 16:18:38,952 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 [2021-12-14 16:18:38,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:18:38,965 INFO L225 Difference]: With dead ends: 6797 [2021-12-14 16:18:38,966 INFO L226 Difference]: Without dead ends: 3812 [2021-12-14 16:18:38,972 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 [2021-12-14 16:18:38,973 INFO L933 BasicCegarLoop]: 544 mSDtfsCounter, 1223 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1252 SdHoareTripleChecker+Valid, 1096 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 16:18:38,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1252 Valid, 1096 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 16:18:38,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3812 states. [2021-12-14 16:18:39,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3812 to 3531. [2021-12-14 16:18:39,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3531 states, 2794 states have (on average 1.280959198282033) internal successors, (3579), 2836 states have internal predecessors, (3579), 369 states have call successors, (369), 304 states have call predecessors, (369), 366 states have return successors, (498), 392 states have call predecessors, (498), 365 states have call successors, (498) [2021-12-14 16:18:39,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3531 states to 3531 states and 4446 transitions. [2021-12-14 16:18:39,118 INFO L78 Accepts]: Start accepts. Automaton has 3531 states and 4446 transitions. Word has length 72 [2021-12-14 16:18:39,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:18:39,120 INFO L470 AbstractCegarLoop]: Abstraction has 3531 states and 4446 transitions. [2021-12-14 16:18:39,120 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) [2021-12-14 16:18:39,120 INFO L276 IsEmpty]: Start isEmpty. Operand 3531 states and 4446 transitions. [2021-12-14 16:18:39,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-14 16:18:39,121 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:18:39,121 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] [2021-12-14 16:18:39,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-14 16:18:39,122 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:18:39,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:18:39,122 INFO L85 PathProgramCache]: Analyzing trace with hash 33226707, now seen corresponding path program 1 times [2021-12-14 16:18:39,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:18:39,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943098790] [2021-12-14 16:18:39,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:18:39,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:18:39,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:39,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:18:39,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:39,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:18:39,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:39,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:18:39,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:39,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:18:39,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:39,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:18:39,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:39,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:18:39,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:39,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 16:18:39,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:39,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:18:39,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:18:39,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943098790] [2021-12-14 16:18:39,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943098790] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:18:39,188 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:18:39,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:18:39,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495521001] [2021-12-14 16:18:39,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:18:39,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:18:39,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:18:39,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:18:39,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:18:39,190 INFO L87 Difference]: Start difference. First operand 3531 states and 4446 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) [2021-12-14 16:18:39,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:18:39,604 INFO L93 Difference]: Finished difference Result 4630 states and 5757 transitions. [2021-12-14 16:18:39,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-14 16:18:39,604 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 [2021-12-14 16:18:39,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:18:39,621 INFO L225 Difference]: With dead ends: 4630 [2021-12-14 16:18:39,621 INFO L226 Difference]: Without dead ends: 4627 [2021-12-14 16:18:39,624 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 [2021-12-14 16:18:39,624 INFO L933 BasicCegarLoop]: 540 mSDtfsCounter, 1731 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 313 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1741 SdHoareTripleChecker+Valid, 1068 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 313 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 16:18:39,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1741 Valid, 1068 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [313 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 16:18:39,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4627 states. [2021-12-14 16:18:39,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4627 to 3993. [2021-12-14 16:18:39,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3993 states, 3149 states have (on average 1.2696093998094633) internal successors, (3998), 3194 states have internal predecessors, (3998), 419 states have call successors, (419), 348 states have call predecessors, (419), 423 states have return successors, (575), 452 states have call predecessors, (575), 416 states have call successors, (575) [2021-12-14 16:18:39,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3993 states to 3993 states and 4992 transitions. [2021-12-14 16:18:39,803 INFO L78 Accepts]: Start accepts. Automaton has 3993 states and 4992 transitions. Word has length 73 [2021-12-14 16:18:39,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:18:39,803 INFO L470 AbstractCegarLoop]: Abstraction has 3993 states and 4992 transitions. [2021-12-14 16:18:39,803 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) [2021-12-14 16:18:39,803 INFO L276 IsEmpty]: Start isEmpty. Operand 3993 states and 4992 transitions. [2021-12-14 16:18:39,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-14 16:18:39,804 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:18:39,804 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] [2021-12-14 16:18:39,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-14 16:18:39,804 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:18:39,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:18:39,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1028933253, now seen corresponding path program 1 times [2021-12-14 16:18:39,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:18:39,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076609456] [2021-12-14 16:18:39,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:18:39,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:18:39,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:39,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:18:39,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:39,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:18:39,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:39,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:18:39,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:39,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:18:39,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:39,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:18:39,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:39,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:18:39,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:39,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 16:18:39,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:39,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:18:39,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:18:39,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076609456] [2021-12-14 16:18:39,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076609456] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:18:39,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731041172] [2021-12-14 16:18:39,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:18:39,904 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:18:39,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:18:39,906 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:18:39,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 16:18:39,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:40,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-14 16:18:40,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:18:40,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:18:40,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:18:40,525 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:18:40,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731041172] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:18:40,525 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:18:40,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 4] total 10 [2021-12-14 16:18:40,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391119005] [2021-12-14 16:18:40,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:18:40,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:18:40,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:18:40,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:18:40,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:18:40,527 INFO L87 Difference]: Start difference. First operand 3993 states and 4992 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) [2021-12-14 16:18:41,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:18:41,842 INFO L93 Difference]: Finished difference Result 8338 states and 10243 transitions. [2021-12-14 16:18:41,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-14 16:18:41,843 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 [2021-12-14 16:18:41,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:18:41,878 INFO L225 Difference]: With dead ends: 8338 [2021-12-14 16:18:41,878 INFO L226 Difference]: Without dead ends: 8335 [2021-12-14 16:18:41,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 173 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=163, Invalid=593, Unknown=0, NotChecked=0, Total=756 [2021-12-14 16:18:41,882 INFO L933 BasicCegarLoop]: 690 mSDtfsCounter, 1404 mSDsluCounter, 1920 mSDsCounter, 0 mSdLazyCounter, 1925 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1463 SdHoareTripleChecker+Valid, 2610 SdHoareTripleChecker+Invalid, 2110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 1925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-14 16:18:41,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1463 Valid, 2610 Invalid, 2110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 1925 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-14 16:18:41,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8335 states. [2021-12-14 16:18:42,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8335 to 7410. [2021-12-14 16:18:42,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7410 states, 5824 states have (on average 1.2520604395604396) internal successors, (7292), 5904 states have internal predecessors, (7292), 778 states have call successors, (778), 662 states have call predecessors, (778), 806 states have return successors, (1076), 845 states have call predecessors, (1076), 775 states have call successors, (1076) [2021-12-14 16:18:42,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7410 states to 7410 states and 9146 transitions. [2021-12-14 16:18:42,180 INFO L78 Accepts]: Start accepts. Automaton has 7410 states and 9146 transitions. Word has length 74 [2021-12-14 16:18:42,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:18:42,180 INFO L470 AbstractCegarLoop]: Abstraction has 7410 states and 9146 transitions. [2021-12-14 16:18:42,180 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) [2021-12-14 16:18:42,180 INFO L276 IsEmpty]: Start isEmpty. Operand 7410 states and 9146 transitions. [2021-12-14 16:18:42,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-14 16:18:42,181 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:18:42,181 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] [2021-12-14 16:18:42,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-14 16:18:42,398 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 [2021-12-14 16:18:42,399 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:18:42,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:18:42,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1516349741, now seen corresponding path program 2 times [2021-12-14 16:18:42,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:18:42,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154407780] [2021-12-14 16:18:42,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:18:42,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:18:42,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:42,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:18:42,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:42,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:18:42,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:42,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:18:42,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:42,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:18:42,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:42,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:18:42,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:42,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:18:42,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:42,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 16:18:42,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:42,446 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:18:42,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:18:42,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154407780] [2021-12-14 16:18:42,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154407780] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:18:42,447 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:18:42,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 16:18:42,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018568251] [2021-12-14 16:18:42,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:18:42,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:18:42,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:18:42,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:18:42,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:18:42,448 INFO L87 Difference]: Start difference. First operand 7410 states and 9146 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) [2021-12-14 16:18:42,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:18:42,859 INFO L93 Difference]: Finished difference Result 10011 states and 12368 transitions. [2021-12-14 16:18:42,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 16:18:42,860 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 [2021-12-14 16:18:42,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:18:42,871 INFO L225 Difference]: With dead ends: 10011 [2021-12-14 16:18:42,872 INFO L226 Difference]: Without dead ends: 3837 [2021-12-14 16:18:42,882 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 [2021-12-14 16:18:42,883 INFO L933 BasicCegarLoop]: 569 mSDtfsCounter, 928 mSDsluCounter, 834 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 959 SdHoareTripleChecker+Valid, 1403 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 16:18:42,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [959 Valid, 1403 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 16:18:42,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3837 states. [2021-12-14 16:18:42,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3837 to 2844. [2021-12-14 16:18:42,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2844 states, 2262 states have (on average 1.259946949602122) internal successors, (2850), 2288 states have internal predecessors, (2850), 298 states have call successors, (298), 245 states have call predecessors, (298), 282 states have return successors, (377), 312 states have call predecessors, (377), 295 states have call successors, (377) [2021-12-14 16:18:42,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2844 states to 2844 states and 3525 transitions. [2021-12-14 16:18:42,993 INFO L78 Accepts]: Start accepts. Automaton has 2844 states and 3525 transitions. Word has length 77 [2021-12-14 16:18:42,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:18:42,994 INFO L470 AbstractCegarLoop]: Abstraction has 2844 states and 3525 transitions. [2021-12-14 16:18:42,994 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) [2021-12-14 16:18:42,995 INFO L276 IsEmpty]: Start isEmpty. Operand 2844 states and 3525 transitions. [2021-12-14 16:18:42,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-14 16:18:42,997 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:18:42,997 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] [2021-12-14 16:18:42,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-14 16:18:42,998 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:18:42,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:18:42,998 INFO L85 PathProgramCache]: Analyzing trace with hash 522255415, now seen corresponding path program 1 times [2021-12-14 16:18:42,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:18:42,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635113294] [2021-12-14 16:18:42,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:18:42,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:18:43,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:43,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:18:43,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:43,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:18:43,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:43,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:18:43,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:43,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:18:43,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:43,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:18:43,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:43,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:18:43,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:43,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 16:18:43,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:43,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-14 16:18:43,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:43,058 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-14 16:18:43,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:18:43,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635113294] [2021-12-14 16:18:43,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635113294] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:18:43,058 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:18:43,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 16:18:43,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211333443] [2021-12-14 16:18:43,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:18:43,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 16:18:43,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:18:43,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 16:18:43,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:18:43,060 INFO L87 Difference]: Start difference. First operand 2844 states and 3525 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) [2021-12-14 16:18:43,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:18:43,880 INFO L93 Difference]: Finished difference Result 8040 states and 9826 transitions. [2021-12-14 16:18:43,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-14 16:18:43,880 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 [2021-12-14 16:18:43,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:18:43,895 INFO L225 Difference]: With dead ends: 8040 [2021-12-14 16:18:43,895 INFO L226 Difference]: Without dead ends: 5465 [2021-12-14 16:18:43,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2021-12-14 16:18:43,902 INFO L933 BasicCegarLoop]: 569 mSDtfsCounter, 924 mSDsluCounter, 1592 mSDsCounter, 0 mSdLazyCounter, 989 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 937 SdHoareTripleChecker+Valid, 2161 SdHoareTripleChecker+Invalid, 1211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 989 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-14 16:18:43,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [937 Valid, 2161 Invalid, 1211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 989 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-14 16:18:43,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5465 states. [2021-12-14 16:18:44,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5465 to 5158. [2021-12-14 16:18:44,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5158 states, 4010 states have (on average 1.2231920199501247) internal successors, (4905), 4110 states have internal predecessors, (4905), 565 states have call successors, (565), 473 states have call predecessors, (565), 581 states have return successors, (822), 577 states have call predecessors, (822), 562 states have call successors, (822) [2021-12-14 16:18:44,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5158 states to 5158 states and 6292 transitions. [2021-12-14 16:18:44,112 INFO L78 Accepts]: Start accepts. Automaton has 5158 states and 6292 transitions. Word has length 84 [2021-12-14 16:18:44,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:18:44,112 INFO L470 AbstractCegarLoop]: Abstraction has 5158 states and 6292 transitions. [2021-12-14 16:18:44,113 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) [2021-12-14 16:18:44,113 INFO L276 IsEmpty]: Start isEmpty. Operand 5158 states and 6292 transitions. [2021-12-14 16:18:44,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-14 16:18:44,115 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:18:44,115 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] [2021-12-14 16:18:44,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-14 16:18:44,115 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:18:44,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:18:44,116 INFO L85 PathProgramCache]: Analyzing trace with hash -315104239, now seen corresponding path program 1 times [2021-12-14 16:18:44,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:18:44,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173833765] [2021-12-14 16:18:44,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:18:44,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:18:44,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:44,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:18:44,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:44,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:18:44,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:44,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:18:44,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:44,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:18:44,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:44,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:18:44,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:44,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:18:44,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:44,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 16:18:44,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:44,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-14 16:18:44,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:44,177 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-14 16:18:44,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:18:44,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173833765] [2021-12-14 16:18:44,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173833765] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:18:44,178 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:18:44,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-14 16:18:44,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253249300] [2021-12-14 16:18:44,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:18:44,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 16:18:44,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:18:44,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 16:18:44,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:18:44,180 INFO L87 Difference]: Start difference. First operand 5158 states and 6292 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) [2021-12-14 16:18:45,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:18:45,142 INFO L93 Difference]: Finished difference Result 8060 states and 9812 transitions. [2021-12-14 16:18:45,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-14 16:18:45,143 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 [2021-12-14 16:18:45,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:18:45,151 INFO L225 Difference]: With dead ends: 8060 [2021-12-14 16:18:45,151 INFO L226 Difference]: Without dead ends: 3762 [2021-12-14 16:18:45,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2021-12-14 16:18:45,159 INFO L933 BasicCegarLoop]: 553 mSDtfsCounter, 1869 mSDsluCounter, 1084 mSDsCounter, 0 mSdLazyCounter, 1043 mSolverCounterSat, 370 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1903 SdHoareTripleChecker+Valid, 1637 SdHoareTripleChecker+Invalid, 1413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 370 IncrementalHoareTripleChecker+Valid, 1043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-14 16:18:45,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1903 Valid, 1637 Invalid, 1413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [370 Valid, 1043 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-14 16:18:45,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3762 states. [2021-12-14 16:18:45,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3762 to 3393. [2021-12-14 16:18:45,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3393 states, 2640 states have (on average 1.2166666666666666) internal successors, (3212), 2711 states have internal predecessors, (3212), 367 states have call successors, (367), 300 states have call predecessors, (367), 384 states have return successors, (507), 384 states have call predecessors, (507), 364 states have call successors, (507) [2021-12-14 16:18:45,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3393 states to 3393 states and 4086 transitions. [2021-12-14 16:18:45,272 INFO L78 Accepts]: Start accepts. Automaton has 3393 states and 4086 transitions. Word has length 93 [2021-12-14 16:18:45,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:18:45,272 INFO L470 AbstractCegarLoop]: Abstraction has 3393 states and 4086 transitions. [2021-12-14 16:18:45,273 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) [2021-12-14 16:18:45,273 INFO L276 IsEmpty]: Start isEmpty. Operand 3393 states and 4086 transitions. [2021-12-14 16:18:45,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-14 16:18:45,275 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:18:45,275 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:18:45,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-14 16:18:45,275 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:18:45,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:18:45,275 INFO L85 PathProgramCache]: Analyzing trace with hash -909909463, now seen corresponding path program 1 times [2021-12-14 16:18:45,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:18:45,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856831378] [2021-12-14 16:18:45,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:18:45,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:18:45,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:45,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:18:45,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:45,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:18:45,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:45,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-14 16:18:45,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:45,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-14 16:18:45,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:45,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-14 16:18:45,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:45,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:18:45,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:18:45,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856831378] [2021-12-14 16:18:45,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856831378] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:18:45,343 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:18:45,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:18:45,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272989517] [2021-12-14 16:18:45,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:18:45,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 16:18:45,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:18:45,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 16:18:45,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:18:45,344 INFO L87 Difference]: Start difference. First operand 3393 states and 4086 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 3 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:18:46,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:18:46,203 INFO L93 Difference]: Finished difference Result 3730 states and 4624 transitions. [2021-12-14 16:18:46,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:18:46,203 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 3 states have internal predecessors, (113), 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 124 [2021-12-14 16:18:46,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:18:46,210 INFO L225 Difference]: With dead ends: 3730 [2021-12-14 16:18:46,210 INFO L226 Difference]: Without dead ends: 3480 [2021-12-14 16:18:46,212 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 [2021-12-14 16:18:46,212 INFO L933 BasicCegarLoop]: 565 mSDtfsCounter, 768 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 787 SdHoareTripleChecker+Valid, 1039 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-14 16:18:46,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [787 Valid, 1039 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-14 16:18:46,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3480 states. [2021-12-14 16:18:46,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3480 to 3393. [2021-12-14 16:18:46,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3393 states, 2640 states have (on average 1.2162878787878788) internal successors, (3211), 2711 states have internal predecessors, (3211), 367 states have call successors, (367), 300 states have call predecessors, (367), 384 states have return successors, (507), 384 states have call predecessors, (507), 364 states have call successors, (507) [2021-12-14 16:18:46,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3393 states to 3393 states and 4085 transitions. [2021-12-14 16:18:46,390 INFO L78 Accepts]: Start accepts. Automaton has 3393 states and 4085 transitions. Word has length 124 [2021-12-14 16:18:46,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:18:46,390 INFO L470 AbstractCegarLoop]: Abstraction has 3393 states and 4085 transitions. [2021-12-14 16:18:46,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 3 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:18:46,390 INFO L276 IsEmpty]: Start isEmpty. Operand 3393 states and 4085 transitions. [2021-12-14 16:18:46,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-14 16:18:46,392 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:18:46,392 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:18:46,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-14 16:18:46,393 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:18:46,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:18:46,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1657912871, now seen corresponding path program 1 times [2021-12-14 16:18:46,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:18:46,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617988331] [2021-12-14 16:18:46,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:18:46,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:18:46,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:46,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:18:46,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:46,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:18:46,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:46,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-14 16:18:46,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:46,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-14 16:18:46,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:46,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-14 16:18:46,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:46,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:18:46,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:18:46,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617988331] [2021-12-14 16:18:46,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617988331] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:18:46,453 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:18:46,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 16:18:46,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204299031] [2021-12-14 16:18:46,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:18:46,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:18:46,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:18:46,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:18:46,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:18:46,454 INFO L87 Difference]: Start difference. First operand 3393 states and 4085 transitions. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:18:47,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:18:47,840 INFO L93 Difference]: Finished difference Result 4063 states and 5156 transitions. [2021-12-14 16:18:47,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 16:18:47,841 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 4 states have internal predecessors, (113), 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 124 [2021-12-14 16:18:47,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:18:47,849 INFO L225 Difference]: With dead ends: 4063 [2021-12-14 16:18:47,849 INFO L226 Difference]: Without dead ends: 3819 [2021-12-14 16:18:47,851 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 [2021-12-14 16:18:47,851 INFO L933 BasicCegarLoop]: 587 mSDtfsCounter, 1210 mSDsluCounter, 873 mSDsCounter, 0 mSdLazyCounter, 1350 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1234 SdHoareTripleChecker+Valid, 1460 SdHoareTripleChecker+Invalid, 1488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 1350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-14 16:18:47,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1234 Valid, 1460 Invalid, 1488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 1350 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-14 16:18:47,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3819 states. [2021-12-14 16:18:48,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3819 to 3644. [2021-12-14 16:18:48,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3644 states, 2868 states have (on average 1.2454672245467224) internal successors, (3572), 2940 states have internal predecessors, (3572), 383 states have call successors, (383), 306 states have call predecessors, (383), 391 states have return successors, (526), 400 states have call predecessors, (526), 380 states have call successors, (526) [2021-12-14 16:18:48,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3644 states to 3644 states and 4481 transitions. [2021-12-14 16:18:48,015 INFO L78 Accepts]: Start accepts. Automaton has 3644 states and 4481 transitions. Word has length 124 [2021-12-14 16:18:48,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:18:48,015 INFO L470 AbstractCegarLoop]: Abstraction has 3644 states and 4481 transitions. [2021-12-14 16:18:48,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:18:48,015 INFO L276 IsEmpty]: Start isEmpty. Operand 3644 states and 4481 transitions. [2021-12-14 16:18:48,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-14 16:18:48,018 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:18:48,018 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:18:48,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-14 16:18:48,019 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:18:48,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:18:48,019 INFO L85 PathProgramCache]: Analyzing trace with hash 640264483, now seen corresponding path program 1 times [2021-12-14 16:18:48,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:18:48,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731635119] [2021-12-14 16:18:48,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:18:48,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:18:48,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:48,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:18:48,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:48,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:18:48,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:48,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-14 16:18:48,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:48,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-14 16:18:48,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:48,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-14 16:18:48,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:48,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:18:48,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:18:48,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731635119] [2021-12-14 16:18:48,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731635119] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:18:48,105 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:18:48,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:18:48,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880090131] [2021-12-14 16:18:48,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:18:48,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:18:48,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:18:48,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:18:48,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:18:48,107 INFO L87 Difference]: Start difference. First operand 3644 states and 4481 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:18:49,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:18:49,899 INFO L93 Difference]: Finished difference Result 4661 states and 6105 transitions. [2021-12-14 16:18:49,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:18:49,900 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 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 124 [2021-12-14 16:18:49,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:18:49,909 INFO L225 Difference]: With dead ends: 4661 [2021-12-14 16:18:49,910 INFO L226 Difference]: Without dead ends: 4166 [2021-12-14 16:18:49,912 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 [2021-12-14 16:18:49,912 INFO L933 BasicCegarLoop]: 790 mSDtfsCounter, 1217 mSDsluCounter, 1579 mSDsCounter, 0 mSdLazyCounter, 2142 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1241 SdHoareTripleChecker+Valid, 2369 SdHoareTripleChecker+Invalid, 2245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 2142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-14 16:18:49,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1241 Valid, 2369 Invalid, 2245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 2142 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-14 16:18:49,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4166 states. [2021-12-14 16:18:50,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4166 to 3878. [2021-12-14 16:18:50,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3079 states have (on average 1.2663202338421566) internal successors, (3899), 3152 states have internal predecessors, (3899), 399 states have call successors, (399), 312 states have call predecessors, (399), 398 states have return successors, (544), 417 states have call predecessors, (544), 396 states have call successors, (544) [2021-12-14 16:18:50,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 4842 transitions. [2021-12-14 16:18:50,171 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 4842 transitions. Word has length 124 [2021-12-14 16:18:50,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:18:50,171 INFO L470 AbstractCegarLoop]: Abstraction has 3878 states and 4842 transitions. [2021-12-14 16:18:50,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:18:50,172 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 4842 transitions. [2021-12-14 16:18:50,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-14 16:18:50,174 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:18:50,174 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:18:50,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-14 16:18:50,175 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:18:50,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:18:50,175 INFO L85 PathProgramCache]: Analyzing trace with hash 758705957, now seen corresponding path program 1 times [2021-12-14 16:18:50,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:18:50,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194655954] [2021-12-14 16:18:50,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:18:50,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:18:50,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:50,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:18:50,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:50,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:18:50,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:50,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-14 16:18:50,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:50,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-14 16:18:50,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:50,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-14 16:18:50,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:50,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:18:50,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:18:50,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194655954] [2021-12-14 16:18:50,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194655954] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:18:50,271 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:18:50,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:18:50,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54723216] [2021-12-14 16:18:50,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:18:50,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:18:50,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:18:50,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:18:50,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:18:50,273 INFO L87 Difference]: Start difference. First operand 3878 states and 4842 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:18:51,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:18:51,318 INFO L93 Difference]: Finished difference Result 4903 states and 6490 transitions. [2021-12-14 16:18:51,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:18:51,319 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 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 124 [2021-12-14 16:18:51,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:18:51,327 INFO L225 Difference]: With dead ends: 4903 [2021-12-14 16:18:51,327 INFO L226 Difference]: Without dead ends: 4174 [2021-12-14 16:18:51,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:18:51,329 INFO L933 BasicCegarLoop]: 537 mSDtfsCounter, 938 mSDsluCounter, 860 mSDsCounter, 0 mSdLazyCounter, 1083 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 963 SdHoareTripleChecker+Valid, 1397 SdHoareTripleChecker+Invalid, 1193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 1083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-14 16:18:51,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [963 Valid, 1397 Invalid, 1193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 1083 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-14 16:18:51,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4174 states. [2021-12-14 16:18:51,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4174 to 3878. [2021-12-14 16:18:51,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3079 states have (on average 1.2653458915232219) internal successors, (3896), 3152 states have internal predecessors, (3896), 399 states have call successors, (399), 312 states have call predecessors, (399), 398 states have return successors, (544), 417 states have call predecessors, (544), 396 states have call successors, (544) [2021-12-14 16:18:51,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 4839 transitions. [2021-12-14 16:18:51,508 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 4839 transitions. Word has length 124 [2021-12-14 16:18:51,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:18:51,508 INFO L470 AbstractCegarLoop]: Abstraction has 3878 states and 4839 transitions. [2021-12-14 16:18:51,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:18:51,509 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 4839 transitions. [2021-12-14 16:18:51,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-14 16:18:51,511 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:18:51,511 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:18:51,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-14 16:18:51,511 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:18:51,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:18:51,511 INFO L85 PathProgramCache]: Analyzing trace with hash -2146967325, now seen corresponding path program 1 times [2021-12-14 16:18:51,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:18:51,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542919637] [2021-12-14 16:18:51,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:18:51,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:18:51,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:51,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:18:51,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:51,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:18:51,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:51,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-14 16:18:51,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:51,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-14 16:18:51,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:51,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-14 16:18:51,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:51,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:18:51,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:18:51,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542919637] [2021-12-14 16:18:51,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542919637] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:18:51,585 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:18:51,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:18:51,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935970404] [2021-12-14 16:18:51,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:18:51,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:18:51,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:18:51,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:18:51,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:18:51,586 INFO L87 Difference]: Start difference. First operand 3878 states and 4839 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:18:52,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:18:52,610 INFO L93 Difference]: Finished difference Result 4899 states and 6474 transitions. [2021-12-14 16:18:52,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:18:52,611 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 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 124 [2021-12-14 16:18:52,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:18:52,621 INFO L225 Difference]: With dead ends: 4899 [2021-12-14 16:18:52,621 INFO L226 Difference]: Without dead ends: 4170 [2021-12-14 16:18:52,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:18:52,625 INFO L933 BasicCegarLoop]: 531 mSDtfsCounter, 938 mSDsluCounter, 860 mSDsCounter, 0 mSdLazyCounter, 1068 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 963 SdHoareTripleChecker+Valid, 1391 SdHoareTripleChecker+Invalid, 1181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 1068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-14 16:18:52,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [963 Valid, 1391 Invalid, 1181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 1068 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-14 16:18:52,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4170 states. [2021-12-14 16:18:52,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4170 to 3878. [2021-12-14 16:18:52,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3079 states have (on average 1.264371549204287) internal successors, (3893), 3152 states have internal predecessors, (3893), 399 states have call successors, (399), 312 states have call predecessors, (399), 398 states have return successors, (544), 417 states have call predecessors, (544), 396 states have call successors, (544) [2021-12-14 16:18:52,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 4836 transitions. [2021-12-14 16:18:52,811 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 4836 transitions. Word has length 124 [2021-12-14 16:18:52,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:18:52,811 INFO L470 AbstractCegarLoop]: Abstraction has 3878 states and 4836 transitions. [2021-12-14 16:18:52,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:18:52,811 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 4836 transitions. [2021-12-14 16:18:52,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-14 16:18:52,813 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:18:52,814 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:18:52,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-14 16:18:52,814 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:18:52,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:18:52,814 INFO L85 PathProgramCache]: Analyzing trace with hash 114605925, now seen corresponding path program 1 times [2021-12-14 16:18:52,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:18:52,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464402174] [2021-12-14 16:18:52,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:18:52,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:18:52,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:52,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:18:52,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:52,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:18:52,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:52,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-14 16:18:52,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:52,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-14 16:18:52,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:52,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-14 16:18:52,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:52,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:18:52,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:18:52,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464402174] [2021-12-14 16:18:52,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464402174] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:18:52,900 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:18:52,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:18:52,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065446851] [2021-12-14 16:18:52,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:18:52,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:18:52,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:18:52,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:18:52,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:18:52,902 INFO L87 Difference]: Start difference. First operand 3878 states and 4836 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:18:54,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:18:54,558 INFO L93 Difference]: Finished difference Result 5529 states and 7446 transitions. [2021-12-14 16:18:54,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:18:54,559 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 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 124 [2021-12-14 16:18:54,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:18:54,571 INFO L225 Difference]: With dead ends: 5529 [2021-12-14 16:18:54,572 INFO L226 Difference]: Without dead ends: 4800 [2021-12-14 16:18:54,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 16:18:54,576 INFO L933 BasicCegarLoop]: 599 mSDtfsCounter, 1268 mSDsluCounter, 1128 mSDsCounter, 0 mSdLazyCounter, 1887 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1292 SdHoareTripleChecker+Valid, 1727 SdHoareTripleChecker+Invalid, 2027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 1887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-14 16:18:54,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1292 Valid, 1727 Invalid, 2027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 1887 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-14 16:18:54,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4800 states. [2021-12-14 16:18:54,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4800 to 4354. [2021-12-14 16:18:54,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4354 states, 3509 states have (on average 1.298375605585637) internal successors, (4556), 3584 states have internal predecessors, (4556), 431 states have call successors, (431), 324 states have call predecessors, (431), 412 states have return successors, (584), 451 states have call predecessors, (584), 428 states have call successors, (584) [2021-12-14 16:18:54,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4354 states to 4354 states and 5571 transitions. [2021-12-14 16:18:54,864 INFO L78 Accepts]: Start accepts. Automaton has 4354 states and 5571 transitions. Word has length 124 [2021-12-14 16:18:54,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:18:54,864 INFO L470 AbstractCegarLoop]: Abstraction has 4354 states and 5571 transitions. [2021-12-14 16:18:54,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:18:54,865 INFO L276 IsEmpty]: Start isEmpty. Operand 4354 states and 5571 transitions. [2021-12-14 16:18:54,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-14 16:18:54,867 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:18:54,867 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:18:54,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-14 16:18:54,868 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:18:54,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:18:54,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1192536473, now seen corresponding path program 1 times [2021-12-14 16:18:54,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:18:54,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544047732] [2021-12-14 16:18:54,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:18:54,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:18:54,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:54,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:18:54,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:54,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:18:54,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:54,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-14 16:18:54,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:54,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-14 16:18:54,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:54,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-14 16:18:54,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:54,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:18:54,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:18:54,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544047732] [2021-12-14 16:18:54,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544047732] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:18:54,941 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:18:54,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:18:54,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616871777] [2021-12-14 16:18:54,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:18:54,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:18:54,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:18:54,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:18:54,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:18:54,943 INFO L87 Difference]: Start difference. First operand 4354 states and 5571 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:18:55,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:18:55,960 INFO L93 Difference]: Finished difference Result 5991 states and 8168 transitions. [2021-12-14 16:18:55,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:18:55,960 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 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 124 [2021-12-14 16:18:55,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:18:56,007 INFO L225 Difference]: With dead ends: 5991 [2021-12-14 16:18:56,008 INFO L226 Difference]: Without dead ends: 4786 [2021-12-14 16:18:56,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:18:56,013 INFO L933 BasicCegarLoop]: 522 mSDtfsCounter, 936 mSDsluCounter, 860 mSDsCounter, 0 mSdLazyCounter, 1043 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 961 SdHoareTripleChecker+Valid, 1382 SdHoareTripleChecker+Invalid, 1156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 1043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-14 16:18:56,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [961 Valid, 1382 Invalid, 1156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 1043 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-14 16:18:56,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4786 states. [2021-12-14 16:18:56,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4786 to 4354. [2021-12-14 16:18:56,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4354 states, 3509 states have (on average 1.2969506982046166) internal successors, (4551), 3584 states have internal predecessors, (4551), 431 states have call successors, (431), 324 states have call predecessors, (431), 412 states have return successors, (584), 451 states have call predecessors, (584), 428 states have call successors, (584) [2021-12-14 16:18:56,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4354 states to 4354 states and 5566 transitions. [2021-12-14 16:18:56,230 INFO L78 Accepts]: Start accepts. Automaton has 4354 states and 5566 transitions. Word has length 124 [2021-12-14 16:18:56,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:18:56,230 INFO L470 AbstractCegarLoop]: Abstraction has 4354 states and 5566 transitions. [2021-12-14 16:18:56,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:18:56,230 INFO L276 IsEmpty]: Start isEmpty. Operand 4354 states and 5566 transitions. [2021-12-14 16:18:56,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-14 16:18:56,232 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:18:56,232 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:18:56,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-14 16:18:56,233 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:18:56,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:18:56,233 INFO L85 PathProgramCache]: Analyzing trace with hash 704960293, now seen corresponding path program 1 times [2021-12-14 16:18:56,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:18:56,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350454301] [2021-12-14 16:18:56,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:18:56,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:18:56,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:56,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:18:56,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:56,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:18:56,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:56,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-14 16:18:56,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:56,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-14 16:18:56,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:56,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-14 16:18:56,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:56,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:18:56,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:18:56,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350454301] [2021-12-14 16:18:56,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350454301] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:18:56,301 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:18:56,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:18:56,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127249560] [2021-12-14 16:18:56,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:18:56,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:18:56,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:18:56,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:18:56,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:18:56,303 INFO L87 Difference]: Start difference. First operand 4354 states and 5566 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:18:58,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:18:58,006 INFO L93 Difference]: Finished difference Result 7221 states and 10057 transitions. [2021-12-14 16:18:58,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:18:58,006 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 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 124 [2021-12-14 16:18:58,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:18:58,022 INFO L225 Difference]: With dead ends: 7221 [2021-12-14 16:18:58,022 INFO L226 Difference]: Without dead ends: 6016 [2021-12-14 16:18:58,027 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 [2021-12-14 16:18:58,027 INFO L933 BasicCegarLoop]: 753 mSDtfsCounter, 1192 mSDsluCounter, 1575 mSDsCounter, 0 mSdLazyCounter, 2067 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1216 SdHoareTripleChecker+Valid, 2328 SdHoareTripleChecker+Invalid, 2177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 2067 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-14 16:18:58,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1216 Valid, 2328 Invalid, 2177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 2067 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-14 16:18:58,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6016 states. [2021-12-14 16:18:58,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6016 to 5308. [2021-12-14 16:18:58,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5308 states, 4371 states have (on average 1.3431708991077556) internal successors, (5871), 4450 states have internal predecessors, (5871), 495 states have call successors, (495), 348 states have call predecessors, (495), 440 states have return successors, (670), 519 states have call predecessors, (670), 492 states have call successors, (670) [2021-12-14 16:18:58,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5308 states to 5308 states and 7036 transitions. [2021-12-14 16:18:58,275 INFO L78 Accepts]: Start accepts. Automaton has 5308 states and 7036 transitions. Word has length 124 [2021-12-14 16:18:58,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:18:58,276 INFO L470 AbstractCegarLoop]: Abstraction has 5308 states and 7036 transitions. [2021-12-14 16:18:58,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:18:58,276 INFO L276 IsEmpty]: Start isEmpty. Operand 5308 states and 7036 transitions. [2021-12-14 16:18:58,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-14 16:18:58,279 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:18:58,279 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:18:58,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-14 16:18:58,279 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:18:58,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:18:58,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1736001191, now seen corresponding path program 1 times [2021-12-14 16:18:58,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:18:58,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355961251] [2021-12-14 16:18:58,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:18:58,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:18:58,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:58,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:18:58,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:58,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:18:58,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:58,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-14 16:18:58,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:58,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-14 16:18:58,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:58,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-14 16:18:58,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:58,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:18:58,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:18:58,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355961251] [2021-12-14 16:18:58,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355961251] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:18:58,371 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:18:58,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:18:58,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196695665] [2021-12-14 16:18:58,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:18:58,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:18:58,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:18:58,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:18:58,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:18:58,372 INFO L87 Difference]: Start difference. First operand 5308 states and 7036 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:19:00,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:19:00,606 INFO L93 Difference]: Finished difference Result 11469 states and 16635 transitions. [2021-12-14 16:19:00,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 16:19:00,606 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 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 124 [2021-12-14 16:19:00,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:19:00,628 INFO L225 Difference]: With dead ends: 11469 [2021-12-14 16:19:00,628 INFO L226 Difference]: Without dead ends: 9310 [2021-12-14 16:19:00,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-14 16:19:00,636 INFO L933 BasicCegarLoop]: 866 mSDtfsCounter, 1264 mSDsluCounter, 1567 mSDsCounter, 0 mSdLazyCounter, 2403 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1287 SdHoareTripleChecker+Valid, 2433 SdHoareTripleChecker+Invalid, 2515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 2403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-14 16:19:00,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1287 Valid, 2433 Invalid, 2515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 2403 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-14 16:19:00,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9310 states. [2021-12-14 16:19:00,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9310 to 7197. [2021-12-14 16:19:00,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7197 states, 6084 states have (on average 1.3972715318869164) internal successors, (8501), 6171 states have internal predecessors, (8501), 615 states have call successors, (615), 396 states have call predecessors, (615), 496 states have return successors, (852), 647 states have call predecessors, (852), 612 states have call successors, (852) [2021-12-14 16:19:00,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7197 states to 7197 states and 9968 transitions. [2021-12-14 16:19:00,995 INFO L78 Accepts]: Start accepts. Automaton has 7197 states and 9968 transitions. Word has length 124 [2021-12-14 16:19:00,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:19:00,996 INFO L470 AbstractCegarLoop]: Abstraction has 7197 states and 9968 transitions. [2021-12-14 16:19:00,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:19:00,996 INFO L276 IsEmpty]: Start isEmpty. Operand 7197 states and 9968 transitions. [2021-12-14 16:19:01,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-14 16:19:01,002 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:19:01,002 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:19:01,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-14 16:19:01,003 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:19:01,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:19:01,003 INFO L85 PathProgramCache]: Analyzing trace with hash -170402075, now seen corresponding path program 1 times [2021-12-14 16:19:01,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:19:01,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720421921] [2021-12-14 16:19:01,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:19:01,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:19:01,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:01,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:19:01,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:01,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:19:01,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:01,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-14 16:19:01,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:01,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-14 16:19:01,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:01,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-14 16:19:01,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:01,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:19:01,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:19:01,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720421921] [2021-12-14 16:19:01,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720421921] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:19:01,078 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:19:01,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:19:01,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781846791] [2021-12-14 16:19:01,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:19:01,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:19:01,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:19:01,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:19:01,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:19:01,080 INFO L87 Difference]: Start difference. First operand 7197 states and 9968 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:19:02,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:19:02,164 INFO L93 Difference]: Finished difference Result 12503 states and 18349 transitions. [2021-12-14 16:19:02,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:19:02,165 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 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 124 [2021-12-14 16:19:02,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:19:02,189 INFO L225 Difference]: With dead ends: 12503 [2021-12-14 16:19:02,190 INFO L226 Difference]: Without dead ends: 8455 [2021-12-14 16:19:02,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:19:02,202 INFO L933 BasicCegarLoop]: 512 mSDtfsCounter, 1092 mSDsluCounter, 667 mSDsCounter, 0 mSdLazyCounter, 909 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1117 SdHoareTripleChecker+Valid, 1179 SdHoareTripleChecker+Invalid, 1062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-14 16:19:02,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1117 Valid, 1179 Invalid, 1062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 909 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-14 16:19:02,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8455 states. [2021-12-14 16:19:02,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8455 to 7197. [2021-12-14 16:19:02,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7197 states, 6084 states have (on average 1.3944773175542406) internal successors, (8484), 6171 states have internal predecessors, (8484), 615 states have call successors, (615), 396 states have call predecessors, (615), 496 states have return successors, (852), 647 states have call predecessors, (852), 612 states have call successors, (852) [2021-12-14 16:19:02,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7197 states to 7197 states and 9951 transitions. [2021-12-14 16:19:02,618 INFO L78 Accepts]: Start accepts. Automaton has 7197 states and 9951 transitions. Word has length 124 [2021-12-14 16:19:02,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:19:02,619 INFO L470 AbstractCegarLoop]: Abstraction has 7197 states and 9951 transitions. [2021-12-14 16:19:02,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:19:02,619 INFO L276 IsEmpty]: Start isEmpty. Operand 7197 states and 9951 transitions. [2021-12-14 16:19:02,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-14 16:19:02,624 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:19:02,624 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:19:02,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-14 16:19:02,624 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:19:02,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:19:02,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1430669031, now seen corresponding path program 1 times [2021-12-14 16:19:02,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:19:02,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472862351] [2021-12-14 16:19:02,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:19:02,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:19:02,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:02,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:19:02,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:02,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:19:02,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:02,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-14 16:19:02,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:02,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-14 16:19:02,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:02,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-14 16:19:02,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:02,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:19:02,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:19:02,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472862351] [2021-12-14 16:19:02,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472862351] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:19:02,701 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:19:02,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:19:02,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112256339] [2021-12-14 16:19:02,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:19:02,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:19:02,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:19:02,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:19:02,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:19:02,702 INFO L87 Difference]: Start difference. First operand 7197 states and 9951 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:19:03,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:19:03,907 INFO L93 Difference]: Finished difference Result 12485 states and 18262 transitions. [2021-12-14 16:19:03,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:19:03,907 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 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 124 [2021-12-14 16:19:03,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:19:03,929 INFO L225 Difference]: With dead ends: 12485 [2021-12-14 16:19:03,930 INFO L226 Difference]: Without dead ends: 8437 [2021-12-14 16:19:03,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:19:03,940 INFO L933 BasicCegarLoop]: 508 mSDtfsCounter, 932 mSDsluCounter, 858 mSDsCounter, 0 mSdLazyCounter, 1007 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 957 SdHoareTripleChecker+Valid, 1366 SdHoareTripleChecker+Invalid, 1122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-14 16:19:03,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [957 Valid, 1366 Invalid, 1122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1007 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-14 16:19:03,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8437 states. [2021-12-14 16:19:04,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8437 to 7197. [2021-12-14 16:19:04,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7197 states, 6084 states have (on average 1.3916831032215649) internal successors, (8467), 6171 states have internal predecessors, (8467), 615 states have call successors, (615), 396 states have call predecessors, (615), 496 states have return successors, (852), 647 states have call predecessors, (852), 612 states have call successors, (852) [2021-12-14 16:19:04,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7197 states to 7197 states and 9934 transitions. [2021-12-14 16:19:04,370 INFO L78 Accepts]: Start accepts. Automaton has 7197 states and 9934 transitions. Word has length 124 [2021-12-14 16:19:04,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:19:04,370 INFO L470 AbstractCegarLoop]: Abstraction has 7197 states and 9934 transitions. [2021-12-14 16:19:04,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:19:04,371 INFO L276 IsEmpty]: Start isEmpty. Operand 7197 states and 9934 transitions. [2021-12-14 16:19:04,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-14 16:19:04,376 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:19:04,376 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:19:04,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-14 16:19:04,376 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:19:04,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:19:04,376 INFO L85 PathProgramCache]: Analyzing trace with hash 373937829, now seen corresponding path program 1 times [2021-12-14 16:19:04,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:19:04,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279205527] [2021-12-14 16:19:04,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:19:04,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:19:04,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:04,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:19:04,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:04,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:19:04,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:04,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-14 16:19:04,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:04,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-14 16:19:04,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:04,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-14 16:19:04,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:04,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:19:04,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:19:04,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279205527] [2021-12-14 16:19:04,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279205527] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:19:04,453 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:19:04,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:19:04,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796378116] [2021-12-14 16:19:04,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:19:04,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:19:04,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:19:04,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:19:04,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:19:04,455 INFO L87 Difference]: Start difference. First operand 7197 states and 9934 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:19:06,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:19:06,881 INFO L93 Difference]: Finished difference Result 18376 states and 27285 transitions. [2021-12-14 16:19:06,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 16:19:06,882 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 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 124 [2021-12-14 16:19:06,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:19:06,918 INFO L225 Difference]: With dead ends: 18376 [2021-12-14 16:19:06,918 INFO L226 Difference]: Without dead ends: 14328 [2021-12-14 16:19:06,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-14 16:19:06,931 INFO L933 BasicCegarLoop]: 727 mSDtfsCounter, 1353 mSDsluCounter, 1567 mSDsCounter, 0 mSdLazyCounter, 2003 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1385 SdHoareTripleChecker+Valid, 2294 SdHoareTripleChecker+Invalid, 2121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 2003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-14 16:19:06,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1385 Valid, 2294 Invalid, 2121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 2003 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-14 16:19:06,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14328 states. [2021-12-14 16:19:07,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14328 to 11000. [2021-12-14 16:19:07,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11000 states, 9543 states have (on average 1.4394844388557058) internal successors, (13737), 9646 states have internal predecessors, (13737), 847 states have call successors, (847), 492 states have call predecessors, (847), 608 states have return successors, (1262), 895 states have call predecessors, (1262), 844 states have call successors, (1262) [2021-12-14 16:19:07,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11000 states to 11000 states and 15846 transitions. [2021-12-14 16:19:07,557 INFO L78 Accepts]: Start accepts. Automaton has 11000 states and 15846 transitions. Word has length 124 [2021-12-14 16:19:07,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:19:07,557 INFO L470 AbstractCegarLoop]: Abstraction has 11000 states and 15846 transitions. [2021-12-14 16:19:07,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:19:07,557 INFO L276 IsEmpty]: Start isEmpty. Operand 11000 states and 15846 transitions. [2021-12-14 16:19:07,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-14 16:19:07,563 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:19:07,563 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:19:07,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-14 16:19:07,564 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:19:07,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:19:07,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1725323047, now seen corresponding path program 1 times [2021-12-14 16:19:07,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:19:07,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225205688] [2021-12-14 16:19:07,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:19:07,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:19:07,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:07,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:19:07,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:07,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:19:07,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:07,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-14 16:19:07,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:07,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-14 16:19:07,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:07,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-14 16:19:07,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:07,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:19:07,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:19:07,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225205688] [2021-12-14 16:19:07,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225205688] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:19:07,631 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:19:07,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:19:07,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929992143] [2021-12-14 16:19:07,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:19:07,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:19:07,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:19:07,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:19:07,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:19:07,633 INFO L87 Difference]: Start difference. First operand 11000 states and 15846 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:19:10,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:19:10,675 INFO L93 Difference]: Finished difference Result 31887 states and 48491 transitions. [2021-12-14 16:19:10,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 16:19:10,676 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 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 124 [2021-12-14 16:19:10,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:19:10,761 INFO L225 Difference]: With dead ends: 31887 [2021-12-14 16:19:10,761 INFO L226 Difference]: Without dead ends: 24036 [2021-12-14 16:19:10,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-14 16:19:10,791 INFO L933 BasicCegarLoop]: 615 mSDtfsCounter, 1249 mSDsluCounter, 1124 mSDsCounter, 0 mSdLazyCounter, 1999 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1272 SdHoareTripleChecker+Valid, 1739 SdHoareTripleChecker+Invalid, 2142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 1999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-14 16:19:10,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1272 Valid, 1739 Invalid, 2142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 1999 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-14 16:19:10,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24036 states. [2021-12-14 16:19:11,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24036 to 18618. [2021-12-14 16:19:11,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18618 states, 16489 states have (on average 1.4766814239796229) internal successors, (24349), 16624 states have internal predecessors, (24349), 1295 states have call successors, (1295), 684 states have call predecessors, (1295), 832 states have return successors, (2228), 1375 states have call predecessors, (2228), 1292 states have call successors, (2228) [2021-12-14 16:19:11,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18618 states to 18618 states and 27872 transitions. [2021-12-14 16:19:11,890 INFO L78 Accepts]: Start accepts. Automaton has 18618 states and 27872 transitions. Word has length 124 [2021-12-14 16:19:11,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:19:11,890 INFO L470 AbstractCegarLoop]: Abstraction has 18618 states and 27872 transitions. [2021-12-14 16:19:11,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:19:11,890 INFO L276 IsEmpty]: Start isEmpty. Operand 18618 states and 27872 transitions. [2021-12-14 16:19:11,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-14 16:19:11,899 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:19:11,900 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:19:11,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-14 16:19:11,900 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:19:11,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:19:11,900 INFO L85 PathProgramCache]: Analyzing trace with hash 841814057, now seen corresponding path program 1 times [2021-12-14 16:19:11,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:19:11,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095597486] [2021-12-14 16:19:11,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:19:11,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:19:11,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:11,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:19:11,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:11,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:19:11,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:11,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-14 16:19:11,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:11,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-14 16:19:11,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:11,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-14 16:19:11,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:11,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:19:11,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:19:11,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095597486] [2021-12-14 16:19:11,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095597486] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:19:11,967 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:19:11,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:19:11,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882405941] [2021-12-14 16:19:11,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:19:11,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:19:11,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:19:11,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:19:11,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:19:11,969 INFO L87 Difference]: Start difference. First operand 18618 states and 27872 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:19:16,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:19:16,120 INFO L93 Difference]: Finished difference Result 58831 states and 91379 transitions. [2021-12-14 16:19:16,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 16:19:16,120 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 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 124 [2021-12-14 16:19:16,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:19:16,232 INFO L225 Difference]: With dead ends: 58831 [2021-12-14 16:19:16,232 INFO L226 Difference]: Without dead ends: 43362 [2021-12-14 16:19:16,268 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 [2021-12-14 16:19:16,268 INFO L933 BasicCegarLoop]: 713 mSDtfsCounter, 1230 mSDsluCounter, 1567 mSDsCounter, 0 mSdLazyCounter, 1977 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1262 SdHoareTripleChecker+Valid, 2280 SdHoareTripleChecker+Invalid, 2095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 1977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-14 16:19:16,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1262 Valid, 2280 Invalid, 2095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 1977 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-14 16:19:16,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43362 states. [2021-12-14 16:19:18,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43362 to 33819. [2021-12-14 16:19:18,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33819 states, 30378 states have (on average 1.5010533939034827) internal successors, (45599), 30577 states have internal predecessors, (45599), 2159 states have call successors, (2159), 1068 states have call predecessors, (2159), 1280 states have return successors, (4614), 2303 states have call predecessors, (4614), 2156 states have call successors, (4614) [2021-12-14 16:19:18,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33819 states to 33819 states and 52372 transitions. [2021-12-14 16:19:18,324 INFO L78 Accepts]: Start accepts. Automaton has 33819 states and 52372 transitions. Word has length 124 [2021-12-14 16:19:18,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:19:18,325 INFO L470 AbstractCegarLoop]: Abstraction has 33819 states and 52372 transitions. [2021-12-14 16:19:18,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:19:18,325 INFO L276 IsEmpty]: Start isEmpty. Operand 33819 states and 52372 transitions. [2021-12-14 16:19:18,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-14 16:19:18,340 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:19:18,340 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:19:18,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-14 16:19:18,341 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:19:18,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:19:18,341 INFO L85 PathProgramCache]: Analyzing trace with hash 813313767, now seen corresponding path program 1 times [2021-12-14 16:19:18,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:19:18,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759041621] [2021-12-14 16:19:18,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:19:18,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:19:18,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:18,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:19:18,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:18,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:19:18,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:18,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-14 16:19:18,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:18,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-14 16:19:18,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:18,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-14 16:19:18,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:18,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:19:18,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:19:18,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759041621] [2021-12-14 16:19:18,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759041621] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:19:18,406 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:19:18,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:19:18,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329426352] [2021-12-14 16:19:18,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:19:18,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:19:18,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:19:18,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:19:18,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:19:18,407 INFO L87 Difference]: Start difference. First operand 33819 states and 52372 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:19:25,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:19:25,127 INFO L93 Difference]: Finished difference Result 111534 states and 177209 transitions. [2021-12-14 16:19:25,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 16:19:25,128 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 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 124 [2021-12-14 16:19:25,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:19:25,491 INFO L225 Difference]: With dead ends: 111534 [2021-12-14 16:19:25,491 INFO L226 Difference]: Without dead ends: 80864 [2021-12-14 16:19:25,544 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 [2021-12-14 16:19:25,545 INFO L933 BasicCegarLoop]: 721 mSDtfsCounter, 1175 mSDsluCounter, 1567 mSDsCounter, 0 mSdLazyCounter, 2080 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1198 SdHoareTripleChecker+Valid, 2288 SdHoareTripleChecker+Invalid, 2193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 2080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-14 16:19:25,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1198 Valid, 2288 Invalid, 2193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 2080 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-14 16:19:25,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80864 states.