./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/systemc/token_ring.06.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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/systemc/token_ring.06.cil-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4ff0d99c6257365cafb7459615c8e1194d53bcc0d71dc100705abd4bb2d65c37 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 01:07:06,972 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 01:07:06,973 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 01:07:07,013 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 01:07:07,015 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 01:07:07,018 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 01:07:07,019 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 01:07:07,023 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 01:07:07,025 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 01:07:07,028 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 01:07:07,029 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 01:07:07,030 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 01:07:07,030 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 01:07:07,032 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 01:07:07,033 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 01:07:07,037 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 01:07:07,039 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 01:07:07,039 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 01:07:07,041 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 01:07:07,041 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 01:07:07,042 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 01:07:07,043 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 01:07:07,044 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 01:07:07,044 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 01:07:07,046 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 01:07:07,049 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 01:07:07,049 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 01:07:07,050 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 01:07:07,051 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 01:07:07,051 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 01:07:07,052 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 01:07:07,052 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 01:07:07,053 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 01:07:07,054 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 01:07:07,055 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 01:07:07,055 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 01:07:07,056 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 01:07:07,056 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 01:07:07,056 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 01:07:07,057 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 01:07:07,058 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 01:07:07,059 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 01:07:07,087 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 01:07:07,088 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 01:07:07,089 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 01:07:07,089 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 01:07:07,090 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 01:07:07,090 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 01:07:07,090 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 01:07:07,090 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 01:07:07,090 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 01:07:07,091 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 01:07:07,091 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 01:07:07,091 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 01:07:07,092 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 01:07:07,092 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 01:07:07,092 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 01:07:07,092 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 01:07:07,092 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 01:07:07,092 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 01:07:07,093 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 01:07:07,093 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 01:07:07,093 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 01:07:07,093 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 01:07:07,093 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 01:07:07,093 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 01:07:07,093 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 01:07:07,094 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 01:07:07,094 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 01:07:07,094 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 01:07:07,094 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 01:07:07,094 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 01:07:07,094 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 01:07:07,095 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 01:07:07,095 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 01:07:07,095 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 01:07:07,095 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ff0d99c6257365cafb7459615c8e1194d53bcc0d71dc100705abd4bb2d65c37 [2021-12-16 01:07:07,299 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 01:07:07,316 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 01:07:07,319 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 01:07:07,341 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 01:07:07,342 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 01:07:07,343 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/systemc/token_ring.06.cil-1.c [2021-12-16 01:07:07,397 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da492c597/a1fb845ff40849178b25b46f96436592/FLAGfa9e4a8fc [2021-12-16 01:07:07,819 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 01:07:07,829 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/token_ring.06.cil-1.c [2021-12-16 01:07:07,842 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da492c597/a1fb845ff40849178b25b46f96436592/FLAGfa9e4a8fc [2021-12-16 01:07:07,854 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da492c597/a1fb845ff40849178b25b46f96436592 [2021-12-16 01:07:07,856 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 01:07:07,858 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 01:07:07,860 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 01:07:07,860 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 01:07:07,863 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 01:07:07,863 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 01:07:07" (1/1) ... [2021-12-16 01:07:07,864 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b52fde8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:07:07, skipping insertion in model container [2021-12-16 01:07:07,864 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 01:07:07" (1/1) ... [2021-12-16 01:07:07,869 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 01:07:07,921 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 01:07:08,060 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/systemc/token_ring.06.cil-1.c[671,684] [2021-12-16 01:07:08,140 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 01:07:08,166 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 01:07:08,177 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/systemc/token_ring.06.cil-1.c[671,684] [2021-12-16 01:07:08,215 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 01:07:08,226 INFO L208 MainTranslator]: Completed translation [2021-12-16 01:07:08,228 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:07:08 WrapperNode [2021-12-16 01:07:08,228 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 01:07:08,229 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 01:07:08,229 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 01:07:08,229 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 01:07:08,234 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:07:08" (1/1) ... [2021-12-16 01:07:08,253 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:07:08" (1/1) ... [2021-12-16 01:07:08,301 INFO L137 Inliner]: procedures = 40, calls = 50, calls flagged for inlining = 23, calls inlined = 23, statements flattened = 510 [2021-12-16 01:07:08,302 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 01:07:08,302 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 01:07:08,302 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 01:07:08,303 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 01:07:08,308 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:07:08" (1/1) ... [2021-12-16 01:07:08,308 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:07:08" (1/1) ... [2021-12-16 01:07:08,312 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:07:08" (1/1) ... [2021-12-16 01:07:08,312 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:07:08" (1/1) ... [2021-12-16 01:07:08,317 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:07:08" (1/1) ... [2021-12-16 01:07:08,339 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:07:08" (1/1) ... [2021-12-16 01:07:08,341 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:07:08" (1/1) ... [2021-12-16 01:07:08,343 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 01:07:08,344 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 01:07:08,344 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 01:07:08,344 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 01:07:08,345 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:07:08" (1/1) ... [2021-12-16 01:07:08,356 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 01:07:08,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 01:07:08,378 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) [2021-12-16 01:07:08,401 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 [2021-12-16 01:07:08,416 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 01:07:08,417 INFO L130 BoogieDeclarations]: Found specification of procedure error [2021-12-16 01:07:08,417 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2021-12-16 01:07:08,417 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-12-16 01:07:08,417 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-12-16 01:07:08,418 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-12-16 01:07:08,418 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-12-16 01:07:08,423 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-16 01:07:08,423 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-16 01:07:08,423 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-12-16 01:07:08,423 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-12-16 01:07:08,423 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-12-16 01:07:08,423 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-12-16 01:07:08,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 01:07:08,424 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-12-16 01:07:08,424 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-12-16 01:07:08,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 01:07:08,424 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 01:07:08,539 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 01:07:08,540 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 01:07:08,965 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 01:07:08,971 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 01:07:08,972 INFO L301 CfgBuilder]: Removed 9 assume(true) statements. [2021-12-16 01:07:08,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 01:07:08 BoogieIcfgContainer [2021-12-16 01:07:08,973 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 01:07:08,975 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 01:07:08,975 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 01:07:08,979 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 01:07:08,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 01:07:07" (1/3) ... [2021-12-16 01:07:08,980 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d213ce7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 01:07:08, skipping insertion in model container [2021-12-16 01:07:08,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:07:08" (2/3) ... [2021-12-16 01:07:08,981 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d213ce7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 01:07:08, skipping insertion in model container [2021-12-16 01:07:08,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 01:07:08" (3/3) ... [2021-12-16 01:07:08,982 INFO L111 eAbstractionObserver]: Analyzing ICFG token_ring.06.cil-1.c [2021-12-16 01:07:08,986 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 01:07:08,986 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-16 01:07:09,027 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 01:07:09,032 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 [2021-12-16 01:07:09,033 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-16 01:07:09,046 INFO L276 IsEmpty]: Start isEmpty. Operand has 240 states, 209 states have (on average 1.6411483253588517) internal successors, (343), 213 states have internal predecessors, (343), 22 states have call successors, (22), 7 states have call predecessors, (22), 7 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-16 01:07:09,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-16 01:07:09,059 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:07:09,059 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:07:09,060 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:07:09,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:07:09,064 INFO L85 PathProgramCache]: Analyzing trace with hash 750572517, now seen corresponding path program 1 times [2021-12-16 01:07:09,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:07:09,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816875253] [2021-12-16 01:07:09,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:07:09,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:07:09,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:09,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 01:07:09,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:09,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 01:07:09,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:09,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-16 01:07:09,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:09,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-16 01:07:09,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:09,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-16 01:07:09,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:09,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:07:09,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:07:09,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816875253] [2021-12-16 01:07:09,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816875253] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:07:09,427 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:07:09,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 01:07:09,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442835889] [2021-12-16 01:07:09,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:07:09,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 01:07:09,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:07:09,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 01:07:09,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 01:07:09,477 INFO L87 Difference]: Start difference. First operand has 240 states, 209 states have (on average 1.6411483253588517) internal successors, (343), 213 states have internal predecessors, (343), 22 states have call successors, (22), 7 states have call predecessors, (22), 7 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) Second operand has 5 states, 5 states have (on average 20.2) internal successors, (101), 3 states have internal predecessors, (101), 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) [2021-12-16 01:07:10,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:07:10,161 INFO L93 Difference]: Finished difference Result 548 states and 896 transitions. [2021-12-16 01:07:10,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 01:07:10,164 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 3 states have internal predecessors, (101), 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 112 [2021-12-16 01:07:10,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:07:10,173 INFO L225 Difference]: With dead ends: 548 [2021-12-16 01:07:10,173 INFO L226 Difference]: Without dead ends: 310 [2021-12-16 01:07:10,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-16 01:07:10,179 INFO L933 BasicCegarLoop]: 396 mSDtfsCounter, 598 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 616 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-16 01:07:10,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [616 Valid, 669 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-16 01:07:10,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-12-16 01:07:10,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 234. [2021-12-16 01:07:10,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 205 states have (on average 1.551219512195122) internal successors, (318), 207 states have internal predecessors, (318), 22 states have call successors, (22), 7 states have call predecessors, (22), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-12-16 01:07:10,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 360 transitions. [2021-12-16 01:07:10,222 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 360 transitions. Word has length 112 [2021-12-16 01:07:10,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:07:10,222 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 360 transitions. [2021-12-16 01:07:10,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 3 states have internal predecessors, (101), 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) [2021-12-16 01:07:10,223 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 360 transitions. [2021-12-16 01:07:10,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-16 01:07:10,225 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:07:10,225 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] [2021-12-16 01:07:10,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 01:07:10,225 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:07:10,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:07:10,226 INFO L85 PathProgramCache]: Analyzing trace with hash 632131043, now seen corresponding path program 1 times [2021-12-16 01:07:10,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:07:10,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032843463] [2021-12-16 01:07:10,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:07:10,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:07:10,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:10,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 01:07:10,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:10,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 01:07:10,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:10,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-16 01:07:10,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:10,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-16 01:07:10,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:10,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-16 01:07:10,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:10,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:07:10,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:07:10,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032843463] [2021-12-16 01:07:10,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032843463] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:07:10,374 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:07:10,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 01:07:10,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680471674] [2021-12-16 01:07:10,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:07:10,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 01:07:10,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:07:10,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 01:07:10,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-16 01:07:10,376 INFO L87 Difference]: Start difference. First operand 234 states and 360 transitions. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 4 states have internal predecessors, (101), 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) [2021-12-16 01:07:11,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:07:11,497 INFO L93 Difference]: Finished difference Result 832 states and 1311 transitions. [2021-12-16 01:07:11,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-16 01:07:11,498 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 4 states have internal predecessors, (101), 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 112 [2021-12-16 01:07:11,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:07:11,505 INFO L225 Difference]: With dead ends: 832 [2021-12-16 01:07:11,506 INFO L226 Difference]: Without dead ends: 612 [2021-12-16 01:07:11,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-16 01:07:11,512 INFO L933 BasicCegarLoop]: 420 mSDtfsCounter, 879 mSDsluCounter, 648 mSDsCounter, 0 mSdLazyCounter, 1099 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 892 SdHoareTripleChecker+Valid, 1068 SdHoareTripleChecker+Invalid, 1199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-16 01:07:11,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [892 Valid, 1068 Invalid, 1199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1099 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-16 01:07:11,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-12-16 01:07:11,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 459. [2021-12-16 01:07:11,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 408 states have (on average 1.5637254901960784) internal successors, (638), 411 states have internal predecessors, (638), 37 states have call successors, (37), 13 states have call predecessors, (37), 13 states have return successors, (38), 35 states have call predecessors, (38), 35 states have call successors, (38) [2021-12-16 01:07:11,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 713 transitions. [2021-12-16 01:07:11,551 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 713 transitions. Word has length 112 [2021-12-16 01:07:11,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:07:11,551 INFO L470 AbstractCegarLoop]: Abstraction has 459 states and 713 transitions. [2021-12-16 01:07:11,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 4 states have internal predecessors, (101), 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) [2021-12-16 01:07:11,552 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 713 transitions. [2021-12-16 01:07:11,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-16 01:07:11,553 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:07:11,554 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] [2021-12-16 01:07:11,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 01:07:11,554 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:07:11,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:07:11,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1626383839, now seen corresponding path program 1 times [2021-12-16 01:07:11,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:07:11,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277210778] [2021-12-16 01:07:11,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:07:11,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:07:11,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:11,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 01:07:11,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:11,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 01:07:11,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:11,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-16 01:07:11,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:11,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-16 01:07:11,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:11,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-16 01:07:11,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:11,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:07:11,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:07:11,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277210778] [2021-12-16 01:07:11,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277210778] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:07:11,679 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:07:11,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 01:07:11,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918849172] [2021-12-16 01:07:11,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:07:11,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 01:07:11,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:07:11,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 01:07:11,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 01:07:11,683 INFO L87 Difference]: Start difference. First operand 459 states and 713 transitions. Second operand has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 5 states have internal predecessors, (101), 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) [2021-12-16 01:07:13,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:07:13,047 INFO L93 Difference]: Finished difference Result 1365 states and 2151 transitions. [2021-12-16 01:07:13,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 01:07:13,047 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 5 states have internal predecessors, (101), 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 112 [2021-12-16 01:07:13,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:07:13,052 INFO L225 Difference]: With dead ends: 1365 [2021-12-16 01:07:13,052 INFO L226 Difference]: Without dead ends: 920 [2021-12-16 01:07:13,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-16 01:07:13,054 INFO L933 BasicCegarLoop]: 599 mSDtfsCounter, 883 mSDsluCounter, 1236 mSDsCounter, 0 mSdLazyCounter, 1729 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 896 SdHoareTripleChecker+Valid, 1835 SdHoareTripleChecker+Invalid, 1797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-16 01:07:13,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [896 Valid, 1835 Invalid, 1797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1729 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-16 01:07:13,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2021-12-16 01:07:13,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 669. [2021-12-16 01:07:13,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 596 states have (on average 1.5570469798657718) internal successors, (928), 600 states have internal predecessors, (928), 52 states have call successors, (52), 19 states have call predecessors, (52), 20 states have return successors, (55), 51 states have call predecessors, (55), 50 states have call successors, (55) [2021-12-16 01:07:13,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 1035 transitions. [2021-12-16 01:07:13,108 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 1035 transitions. Word has length 112 [2021-12-16 01:07:13,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:07:13,108 INFO L470 AbstractCegarLoop]: Abstraction has 669 states and 1035 transitions. [2021-12-16 01:07:13,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 5 states have internal predecessors, (101), 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) [2021-12-16 01:07:13,109 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 1035 transitions. [2021-12-16 01:07:13,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-16 01:07:13,110 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:07:13,111 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] [2021-12-16 01:07:13,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-16 01:07:13,111 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:07:13,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:07:13,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1317198239, now seen corresponding path program 1 times [2021-12-16 01:07:13,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:07:13,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278804109] [2021-12-16 01:07:13,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:07:13,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:07:13,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:13,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 01:07:13,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:13,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 01:07:13,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:13,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-16 01:07:13,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:13,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-16 01:07:13,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:13,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-16 01:07:13,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:13,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:07:13,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:07:13,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278804109] [2021-12-16 01:07:13,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278804109] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:07:13,220 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:07:13,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 01:07:13,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292113913] [2021-12-16 01:07:13,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:07:13,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 01:07:13,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:07:13,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 01:07:13,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 01:07:13,222 INFO L87 Difference]: Start difference. First operand 669 states and 1035 transitions. Second operand has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 5 states have internal predecessors, (101), 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) [2021-12-16 01:07:14,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:07:14,520 INFO L93 Difference]: Finished difference Result 2150 states and 3381 transitions. [2021-12-16 01:07:14,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 01:07:14,520 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 5 states have internal predecessors, (101), 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 112 [2021-12-16 01:07:14,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:07:14,526 INFO L225 Difference]: With dead ends: 2150 [2021-12-16 01:07:14,526 INFO L226 Difference]: Without dead ends: 1495 [2021-12-16 01:07:14,528 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 [2021-12-16 01:07:14,529 INFO L933 BasicCegarLoop]: 438 mSDtfsCounter, 949 mSDsluCounter, 831 mSDsCounter, 0 mSdLazyCounter, 1535 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 962 SdHoareTripleChecker+Valid, 1269 SdHoareTripleChecker+Invalid, 1637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-16 01:07:14,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [962 Valid, 1269 Invalid, 1637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1535 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-16 01:07:14,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1495 states. [2021-12-16 01:07:14,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1495 to 1090. [2021-12-16 01:07:14,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1090 states, 973 states have (on average 1.5508735868448098) internal successors, (1509), 979 states have internal predecessors, (1509), 82 states have call successors, (82), 31 states have call predecessors, (82), 34 states have return successors, (93), 83 states have call predecessors, (93), 80 states have call successors, (93) [2021-12-16 01:07:14,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1090 states to 1090 states and 1684 transitions. [2021-12-16 01:07:14,571 INFO L78 Accepts]: Start accepts. Automaton has 1090 states and 1684 transitions. Word has length 112 [2021-12-16 01:07:14,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:07:14,571 INFO L470 AbstractCegarLoop]: Abstraction has 1090 states and 1684 transitions. [2021-12-16 01:07:14,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 5 states have internal predecessors, (101), 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) [2021-12-16 01:07:14,572 INFO L276 IsEmpty]: Start isEmpty. Operand 1090 states and 1684 transitions. [2021-12-16 01:07:14,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-16 01:07:14,573 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:07:14,573 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] [2021-12-16 01:07:14,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-16 01:07:14,574 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:07:14,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:07:14,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1358794143, now seen corresponding path program 1 times [2021-12-16 01:07:14,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:07:14,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137479544] [2021-12-16 01:07:14,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:07:14,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:07:14,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:14,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 01:07:14,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:14,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 01:07:14,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:14,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-16 01:07:14,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:14,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-16 01:07:14,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:14,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-16 01:07:14,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:14,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:07:14,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:07:14,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137479544] [2021-12-16 01:07:14,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137479544] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:07:14,673 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:07:14,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 01:07:14,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728424098] [2021-12-16 01:07:14,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:07:14,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 01:07:14,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:07:14,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 01:07:14,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 01:07:14,675 INFO L87 Difference]: Start difference. First operand 1090 states and 1684 transitions. Second operand has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 5 states have internal predecessors, (101), 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) [2021-12-16 01:07:16,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:07:16,029 INFO L93 Difference]: Finished difference Result 3660 states and 5738 transitions. [2021-12-16 01:07:16,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 01:07:16,030 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 5 states have internal predecessors, (101), 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 112 [2021-12-16 01:07:16,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:07:16,040 INFO L225 Difference]: With dead ends: 3660 [2021-12-16 01:07:16,040 INFO L226 Difference]: Without dead ends: 2584 [2021-12-16 01:07:16,043 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 [2021-12-16 01:07:16,045 INFO L933 BasicCegarLoop]: 583 mSDtfsCounter, 877 mSDsluCounter, 1232 mSDsCounter, 0 mSdLazyCounter, 1717 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 890 SdHoareTripleChecker+Valid, 1815 SdHoareTripleChecker+Invalid, 1791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-16 01:07:16,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [890 Valid, 1815 Invalid, 1791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1717 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-16 01:07:16,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2584 states. [2021-12-16 01:07:16,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2584 to 1938. [2021-12-16 01:07:16,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1938 states, 1733 states have (on average 1.5470282746682054) internal successors, (2681), 1743 states have internal predecessors, (2681), 142 states have call successors, (142), 55 states have call predecessors, (142), 62 states have return successors, (175), 147 states have call predecessors, (175), 140 states have call successors, (175) [2021-12-16 01:07:16,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1938 states to 1938 states and 2998 transitions. [2021-12-16 01:07:16,135 INFO L78 Accepts]: Start accepts. Automaton has 1938 states and 2998 transitions. Word has length 112 [2021-12-16 01:07:16,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:07:16,136 INFO L470 AbstractCegarLoop]: Abstraction has 1938 states and 2998 transitions. [2021-12-16 01:07:16,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 5 states have internal predecessors, (101), 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) [2021-12-16 01:07:16,136 INFO L276 IsEmpty]: Start isEmpty. Operand 1938 states and 2998 transitions. [2021-12-16 01:07:16,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-16 01:07:16,138 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:07:16,138 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:07:16,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-16 01:07:16,138 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:07:16,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:07:16,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1330293853, now seen corresponding path program 1 times [2021-12-16 01:07:16,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:07:16,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573549550] [2021-12-16 01:07:16,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:07:16,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:07:16,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:16,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 01:07:16,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:16,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 01:07:16,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:16,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-16 01:07:16,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:16,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-16 01:07:16,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:16,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-16 01:07:16,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:16,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:07:16,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:07:16,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573549550] [2021-12-16 01:07:16,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573549550] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:07:16,244 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:07:16,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 01:07:16,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210946807] [2021-12-16 01:07:16,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:07:16,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 01:07:16,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:07:16,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 01:07:16,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 01:07:16,247 INFO L87 Difference]: Start difference. First operand 1938 states and 2998 transitions. Second operand has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 5 states have internal predecessors, (101), 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) [2021-12-16 01:07:17,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:07:17,645 INFO L93 Difference]: Finished difference Result 6690 states and 10486 transitions. [2021-12-16 01:07:17,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 01:07:17,646 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 5 states have internal predecessors, (101), 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 112 [2021-12-16 01:07:17,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:07:17,669 INFO L225 Difference]: With dead ends: 6690 [2021-12-16 01:07:17,669 INFO L226 Difference]: Without dead ends: 4766 [2021-12-16 01:07:17,675 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 [2021-12-16 01:07:17,678 INFO L933 BasicCegarLoop]: 578 mSDtfsCounter, 876 mSDsluCounter, 1232 mSDsCounter, 0 mSdLazyCounter, 1709 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 889 SdHoareTripleChecker+Valid, 1810 SdHoareTripleChecker+Invalid, 1783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-16 01:07:17,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [889 Valid, 1810 Invalid, 1783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1709 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-16 01:07:17,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4766 states. [2021-12-16 01:07:17,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4766 to 3639. [2021-12-16 01:07:17,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3639 states, 3258 states have (on average 1.5441988950276244) internal successors, (5031), 3276 states have internal predecessors, (5031), 262 states have call successors, (262), 103 states have call predecessors, (262), 118 states have return successors, (357), 275 states have call predecessors, (357), 260 states have call successors, (357) [2021-12-16 01:07:17,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3639 states to 3639 states and 5650 transitions. [2021-12-16 01:07:17,859 INFO L78 Accepts]: Start accepts. Automaton has 3639 states and 5650 transitions. Word has length 112 [2021-12-16 01:07:17,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:07:17,860 INFO L470 AbstractCegarLoop]: Abstraction has 3639 states and 5650 transitions. [2021-12-16 01:07:17,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 5 states have internal predecessors, (101), 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) [2021-12-16 01:07:17,860 INFO L276 IsEmpty]: Start isEmpty. Operand 3639 states and 5650 transitions. [2021-12-16 01:07:17,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-16 01:07:17,862 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:07:17,862 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:07:17,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-16 01:07:17,863 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:07:17,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:07:17,863 INFO L85 PathProgramCache]: Analyzing trace with hash -610288161, now seen corresponding path program 1 times [2021-12-16 01:07:17,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:07:17,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386365415] [2021-12-16 01:07:17,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:07:17,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:07:17,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:17,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 01:07:17,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:17,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 01:07:17,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:17,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-16 01:07:17,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:17,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-16 01:07:17,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:17,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-16 01:07:17,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:17,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:07:17,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:07:17,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386365415] [2021-12-16 01:07:17,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386365415] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:07:17,976 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:07:17,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 01:07:17,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384972064] [2021-12-16 01:07:17,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:07:17,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 01:07:17,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:07:17,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 01:07:17,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 01:07:17,981 INFO L87 Difference]: Start difference. First operand 3639 states and 5650 transitions. Second operand has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 5 states have internal predecessors, (101), 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) [2021-12-16 01:07:19,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:07:19,501 INFO L93 Difference]: Finished difference Result 12749 states and 20040 transitions. [2021-12-16 01:07:19,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 01:07:19,502 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 5 states have internal predecessors, (101), 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 112 [2021-12-16 01:07:19,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:07:19,539 INFO L225 Difference]: With dead ends: 12749 [2021-12-16 01:07:19,540 INFO L226 Difference]: Without dead ends: 9124 [2021-12-16 01:07:19,551 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 [2021-12-16 01:07:19,552 INFO L933 BasicCegarLoop]: 573 mSDtfsCounter, 875 mSDsluCounter, 1232 mSDsCounter, 0 mSdLazyCounter, 1701 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 888 SdHoareTripleChecker+Valid, 1805 SdHoareTripleChecker+Invalid, 1775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-16 01:07:19,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [888 Valid, 1805 Invalid, 1775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1701 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-16 01:07:19,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9124 states. [2021-12-16 01:07:19,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9124 to 7056. [2021-12-16 01:07:19,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7056 states, 6323 states have (on average 1.5424640202435553) internal successors, (9753), 6357 states have internal predecessors, (9753), 502 states have call successors, (502), 199 states have call predecessors, (502), 230 states have return successors, (775), 531 states have call predecessors, (775), 500 states have call successors, (775) [2021-12-16 01:07:19,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7056 states to 7056 states and 11030 transitions. [2021-12-16 01:07:19,814 INFO L78 Accepts]: Start accepts. Automaton has 7056 states and 11030 transitions. Word has length 112 [2021-12-16 01:07:19,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:07:19,814 INFO L470 AbstractCegarLoop]: Abstraction has 7056 states and 11030 transitions. [2021-12-16 01:07:19,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 5 states have internal predecessors, (101), 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) [2021-12-16 01:07:19,815 INFO L276 IsEmpty]: Start isEmpty. Operand 7056 states and 11030 transitions. [2021-12-16 01:07:19,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-16 01:07:19,820 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:07:19,820 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] [2021-12-16 01:07:19,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-16 01:07:19,820 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:07:19,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:07:19,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1266775069, now seen corresponding path program 1 times [2021-12-16 01:07:19,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:07:19,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469245800] [2021-12-16 01:07:19,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:07:19,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:07:19,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:19,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 01:07:19,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:19,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 01:07:19,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:19,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-16 01:07:19,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:19,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-16 01:07:19,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:19,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-16 01:07:19,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:19,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:07:19,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:07:19,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469245800] [2021-12-16 01:07:19,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469245800] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:07:19,949 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:07:19,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 01:07:19,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187742992] [2021-12-16 01:07:19,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:07:19,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 01:07:19,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:07:19,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 01:07:19,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 01:07:19,951 INFO L87 Difference]: Start difference. First operand 7056 states and 11030 transitions. Second operand has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 5 states have internal predecessors, (101), 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) [2021-12-16 01:07:21,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:07:21,908 INFO L93 Difference]: Finished difference Result 27844 states and 43824 transitions. [2021-12-16 01:07:21,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-16 01:07:21,909 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 5 states have internal predecessors, (101), 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 112 [2021-12-16 01:07:21,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:07:21,992 INFO L225 Difference]: With dead ends: 27844 [2021-12-16 01:07:21,993 INFO L226 Difference]: Without dead ends: 20802 [2021-12-16 01:07:22,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-16 01:07:22,014 INFO L933 BasicCegarLoop]: 566 mSDtfsCounter, 1126 mSDsluCounter, 1224 mSDsCounter, 0 mSdLazyCounter, 1686 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1146 SdHoareTripleChecker+Valid, 1790 SdHoareTripleChecker+Invalid, 1765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-16 01:07:22,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1146 Valid, 1790 Invalid, 1765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1686 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-16 01:07:22,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20802 states. [2021-12-16 01:07:22,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20802 to 13825. [2021-12-16 01:07:22,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13825 states, 12420 states have (on average 1.5442028985507246) internal successors, (19179), 12486 states have internal predecessors, (19179), 950 states have call successors, (950), 391 states have call predecessors, (950), 454 states have return successors, (1741), 1011 states have call predecessors, (1741), 948 states have call successors, (1741) [2021-12-16 01:07:22,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13825 states to 13825 states and 21870 transitions. [2021-12-16 01:07:22,696 INFO L78 Accepts]: Start accepts. Automaton has 13825 states and 21870 transitions. Word has length 112 [2021-12-16 01:07:22,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:07:22,697 INFO L470 AbstractCegarLoop]: Abstraction has 13825 states and 21870 transitions. [2021-12-16 01:07:22,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 5 states have internal predecessors, (101), 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) [2021-12-16 01:07:22,698 INFO L276 IsEmpty]: Start isEmpty. Operand 13825 states and 21870 transitions. [2021-12-16 01:07:22,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-16 01:07:22,707 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:07:22,707 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:07:22,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-16 01:07:22,708 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:07:22,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:07:22,708 INFO L85 PathProgramCache]: Analyzing trace with hash 496041503, now seen corresponding path program 1 times [2021-12-16 01:07:22,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:07:22,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263462898] [2021-12-16 01:07:22,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:07:22,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:07:22,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:22,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 01:07:22,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:22,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 01:07:22,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:22,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-16 01:07:22,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:22,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-16 01:07:22,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:22,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-16 01:07:22,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:22,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:07:22,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:07:22,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263462898] [2021-12-16 01:07:22,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263462898] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:07:22,804 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:07:22,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 01:07:22,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929788460] [2021-12-16 01:07:22,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:07:22,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 01:07:22,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:07:22,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 01:07:22,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 01:07:22,806 INFO L87 Difference]: Start difference. First operand 13825 states and 21870 transitions. Second operand has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 5 states have internal predecessors, (101), 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) [2021-12-16 01:07:25,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:07:25,602 INFO L93 Difference]: Finished difference Result 54003 states and 85910 transitions. [2021-12-16 01:07:25,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-16 01:07:25,604 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 5 states have internal predecessors, (101), 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 112 [2021-12-16 01:07:25,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:07:25,757 INFO L225 Difference]: With dead ends: 54003 [2021-12-16 01:07:25,757 INFO L226 Difference]: Without dead ends: 40192 [2021-12-16 01:07:25,812 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 [2021-12-16 01:07:25,814 INFO L933 BasicCegarLoop]: 652 mSDtfsCounter, 925 mSDsluCounter, 1221 mSDsCounter, 0 mSdLazyCounter, 1956 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 937 SdHoareTripleChecker+Valid, 1873 SdHoareTripleChecker+Invalid, 2032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-16 01:07:25,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [937 Valid, 1873 Invalid, 2032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1956 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-16 01:07:25,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40192 states. [2021-12-16 01:07:26,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40192 to 26690. [2021-12-16 01:07:26,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26690 states, 23973 states have (on average 1.5396070579401826) internal successors, (36909), 24103 states have internal predecessors, (36909), 1814 states have call successors, (1814), 775 states have call predecessors, (1814), 902 states have return successors, (4127), 1939 states have call predecessors, (4127), 1812 states have call successors, (4127) [2021-12-16 01:07:27,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26690 states to 26690 states and 42850 transitions. [2021-12-16 01:07:27,069 INFO L78 Accepts]: Start accepts. Automaton has 26690 states and 42850 transitions. Word has length 112 [2021-12-16 01:07:27,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:07:27,070 INFO L470 AbstractCegarLoop]: Abstraction has 26690 states and 42850 transitions. [2021-12-16 01:07:27,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 5 states have internal predecessors, (101), 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) [2021-12-16 01:07:27,070 INFO L276 IsEmpty]: Start isEmpty. Operand 26690 states and 42850 transitions. [2021-12-16 01:07:27,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-16 01:07:27,086 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:07:27,086 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] [2021-12-16 01:07:27,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-16 01:07:27,087 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:07:27,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:07:27,090 INFO L85 PathProgramCache]: Analyzing trace with hash -498652195, now seen corresponding path program 1 times [2021-12-16 01:07:27,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:07:27,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552799835] [2021-12-16 01:07:27,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:07:27,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:07:27,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:27,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 01:07:27,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:27,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 01:07:27,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:27,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-16 01:07:27,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:27,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-16 01:07:27,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:27,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-16 01:07:27,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:27,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:07:27,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:07:27,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552799835] [2021-12-16 01:07:27,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552799835] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:07:27,171 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:07:27,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 01:07:27,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499363314] [2021-12-16 01:07:27,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:07:27,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 01:07:27,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:07:27,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 01:07:27,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 01:07:27,173 INFO L87 Difference]: Start difference. First operand 26690 states and 42850 transitions. Second operand has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 5 states have internal predecessors, (101), 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) [2021-12-16 01:07:31,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:07:31,381 INFO L93 Difference]: Finished difference Result 103218 states and 166620 transitions. [2021-12-16 01:07:31,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-16 01:07:31,382 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 5 states have internal predecessors, (101), 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 112 [2021-12-16 01:07:31,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:07:31,777 INFO L225 Difference]: With dead ends: 103218 [2021-12-16 01:07:31,777 INFO L226 Difference]: Without dead ends: 76542 [2021-12-16 01:07:31,871 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 [2021-12-16 01:07:31,873 INFO L933 BasicCegarLoop]: 556 mSDtfsCounter, 1046 mSDsluCounter, 1224 mSDsCounter, 0 mSdLazyCounter, 1670 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1066 SdHoareTripleChecker+Valid, 1780 SdHoareTripleChecker+Invalid, 1749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-16 01:07:31,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1066 Valid, 1780 Invalid, 1749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1670 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-16 01:07:31,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76542 states. [2021-12-16 01:07:34,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76542 to 52995. [2021-12-16 01:07:34,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52995 states, 47718 states have (on average 1.5420386436983948) internal successors, (73583), 47976 states have internal predecessors, (73583), 3478 states have call successors, (3478), 1543 states have call predecessors, (3478), 1798 states have return successors, (10293), 3731 states have call predecessors, (10293), 3476 states have call successors, (10293) [2021-12-16 01:07:34,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52995 states to 52995 states and 87354 transitions. [2021-12-16 01:07:34,544 INFO L78 Accepts]: Start accepts. Automaton has 52995 states and 87354 transitions. Word has length 112 [2021-12-16 01:07:34,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:07:34,545 INFO L470 AbstractCegarLoop]: Abstraction has 52995 states and 87354 transitions. [2021-12-16 01:07:34,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 5 states have internal predecessors, (101), 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) [2021-12-16 01:07:34,545 INFO L276 IsEmpty]: Start isEmpty. Operand 52995 states and 87354 transitions. [2021-12-16 01:07:34,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-16 01:07:34,578 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:07:34,578 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] [2021-12-16 01:07:34,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-16 01:07:34,578 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:07:34,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:07:34,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1084928417, now seen corresponding path program 1 times [2021-12-16 01:07:34,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:07:34,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925597785] [2021-12-16 01:07:34,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:07:34,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:07:34,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:34,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 01:07:34,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:34,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 01:07:34,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:34,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-16 01:07:34,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:34,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-16 01:07:34,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:34,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-16 01:07:34,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:34,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:07:34,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:07:34,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925597785] [2021-12-16 01:07:34,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925597785] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:07:34,660 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:07:34,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 01:07:34,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68350053] [2021-12-16 01:07:34,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:07:34,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 01:07:34,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:07:34,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 01:07:34,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 01:07:34,662 INFO L87 Difference]: Start difference. First operand 52995 states and 87354 transitions. Second operand has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 5 states have internal predecessors, (101), 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) [2021-12-16 01:07:41,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:07:41,752 INFO L93 Difference]: Finished difference Result 201073 states and 333426 transitions. [2021-12-16 01:07:41,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-16 01:07:41,753 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 5 states have internal predecessors, (101), 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 112 [2021-12-16 01:07:41,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:07:42,341 INFO L225 Difference]: With dead ends: 201073 [2021-12-16 01:07:42,341 INFO L226 Difference]: Without dead ends: 148092 [2021-12-16 01:07:42,499 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 [2021-12-16 01:07:42,499 INFO L933 BasicCegarLoop]: 413 mSDtfsCounter, 1062 mSDsluCounter, 827 mSDsCounter, 0 mSdLazyCounter, 1487 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1082 SdHoareTripleChecker+Valid, 1240 SdHoareTripleChecker+Invalid, 1595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-16 01:07:42,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1082 Valid, 1240 Invalid, 1595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1487 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-16 01:07:42,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148092 states. [2021-12-16 01:07:47,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148092 to 105476. [2021-12-16 01:07:47,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105476 states, 95207 states have (on average 1.5446028128183853) internal successors, (147057), 95721 states have internal predecessors, (147057), 6678 states have call successors, (6678), 3079 states have call predecessors, (6678), 3590 states have return successors, (26871), 7187 states have call predecessors, (26871), 6676 states have call successors, (26871) [2021-12-16 01:07:48,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105476 states to 105476 states and 180606 transitions. [2021-12-16 01:07:48,204 INFO L78 Accepts]: Start accepts. Automaton has 105476 states and 180606 transitions. Word has length 112 [2021-12-16 01:07:48,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:07:48,204 INFO L470 AbstractCegarLoop]: Abstraction has 105476 states and 180606 transitions. [2021-12-16 01:07:48,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 5 states have internal predecessors, (101), 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) [2021-12-16 01:07:48,205 INFO L276 IsEmpty]: Start isEmpty. Operand 105476 states and 180606 transitions. [2021-12-16 01:07:48,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-16 01:07:48,270 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:07:48,270 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] [2021-12-16 01:07:48,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-16 01:07:48,270 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:07:48,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:07:48,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1251464093, now seen corresponding path program 1 times [2021-12-16 01:07:48,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:07:48,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968965120] [2021-12-16 01:07:48,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:07:48,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:07:48,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:48,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 01:07:48,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:48,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 01:07:48,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:48,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-16 01:07:48,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:48,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-16 01:07:48,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:48,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-16 01:07:48,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:48,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:07:48,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:07:48,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968965120] [2021-12-16 01:07:48,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968965120] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:07:48,368 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:07:48,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 01:07:48,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666876861] [2021-12-16 01:07:48,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:07:48,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 01:07:48,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:07:48,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 01:07:48,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 01:07:48,369 INFO L87 Difference]: Start difference. First operand 105476 states and 180606 transitions. Second operand has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 5 states have internal predecessors, (101), 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)