./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/systemc/token_ring.08.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/systemc/token_ring.08.cil-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 19daebdfafed51668fa57cd9e9dbb1892c2070de71da48d425d8df389215d260 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 14:52:58,192 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 14:52:58,194 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 14:52:58,231 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 14:52:58,233 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 14:52:58,237 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 14:52:58,238 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 14:52:58,242 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 14:52:58,243 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 14:52:58,244 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 14:52:58,245 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 14:52:58,246 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 14:52:58,246 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 14:52:58,251 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 14:52:58,253 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 14:52:58,254 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 14:52:58,255 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 14:52:58,261 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 14:52:58,262 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 14:52:58,263 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 14:52:58,264 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 14:52:58,264 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 14:52:58,276 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 14:52:58,276 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 14:52:58,283 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 14:52:58,283 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 14:52:58,284 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 14:52:58,285 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 14:52:58,286 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 14:52:58,286 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 14:52:58,286 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 14:52:58,287 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 14:52:58,288 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 14:52:58,289 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 14:52:58,290 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 14:52:58,290 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 14:52:58,290 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 14:52:58,291 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 14:52:58,291 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 14:52:58,291 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 14:52:58,292 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 14:52:58,292 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 14:52:58,320 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 14:52:58,320 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 14:52:58,320 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 14:52:58,321 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 14:52:58,321 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 14:52:58,322 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 14:52:58,322 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 14:52:58,322 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 14:52:58,322 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 14:52:58,322 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 14:52:58,323 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 14:52:58,323 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 14:52:58,323 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 14:52:58,324 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 14:52:58,324 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 14:52:58,324 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 14:52:58,324 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 14:52:58,324 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 14:52:58,324 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 14:52:58,324 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 14:52:58,324 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 14:52:58,325 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 14:52:58,325 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 14:52:58,325 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 14:52:58,325 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 14:52:58,325 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 14:52:58,325 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 14:52:58,326 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 14:52:58,326 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 14:52:58,326 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 14:52:58,326 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 14:52:58,326 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 14:52:58,326 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 14:52:58,326 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 14:52:58,327 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 19daebdfafed51668fa57cd9e9dbb1892c2070de71da48d425d8df389215d260 [2021-12-14 14:52:58,518 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 14:52:58,537 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 14:52:58,539 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 14:52:58,540 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 14:52:58,541 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 14:52:58,541 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/systemc/token_ring.08.cil-2.c [2021-12-14 14:52:58,601 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f72d2a1f5/cf760ac6037f4470a8194da4eb0690c4/FLAG22f234aad [2021-12-14 14:52:58,981 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 14:52:58,981 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/token_ring.08.cil-2.c [2021-12-14 14:52:58,989 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f72d2a1f5/cf760ac6037f4470a8194da4eb0690c4/FLAG22f234aad [2021-12-14 14:52:58,998 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f72d2a1f5/cf760ac6037f4470a8194da4eb0690c4 [2021-12-14 14:52:59,001 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 14:52:59,002 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 14:52:59,003 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 14:52:59,003 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 14:52:59,021 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 14:52:59,022 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:52:59" (1/1) ... [2021-12-14 14:52:59,023 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a64f072 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:59, skipping insertion in model container [2021-12-14 14:52:59,023 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:52:59" (1/1) ... [2021-12-14 14:52:59,027 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 14:52:59,054 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 14:52:59,225 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.08.cil-2.c[671,684] [2021-12-14 14:52:59,356 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 14:52:59,378 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 14:52:59,397 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.08.cil-2.c[671,684] [2021-12-14 14:52:59,478 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 14:52:59,498 INFO L208 MainTranslator]: Completed translation [2021-12-14 14:52:59,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:59 WrapperNode [2021-12-14 14:52:59,509 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 14:52:59,510 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 14:52:59,510 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 14:52:59,511 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 14:52:59,524 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:59" (1/1) ... [2021-12-14 14:52:59,550 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:59" (1/1) ... [2021-12-14 14:52:59,608 INFO L137 Inliner]: procedures = 44, calls = 56, calls flagged for inlining = 27, calls inlined = 27, statements flattened = 626 [2021-12-14 14:52:59,608 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 14:52:59,610 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 14:52:59,610 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 14:52:59,610 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 14:52:59,616 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:59" (1/1) ... [2021-12-14 14:52:59,616 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:59" (1/1) ... [2021-12-14 14:52:59,625 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:59" (1/1) ... [2021-12-14 14:52:59,625 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:59" (1/1) ... [2021-12-14 14:52:59,650 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:59" (1/1) ... [2021-12-14 14:52:59,691 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:59" (1/1) ... [2021-12-14 14:52:59,693 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:59" (1/1) ... [2021-12-14 14:52:59,697 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 14:52:59,697 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 14:52:59,697 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 14:52:59,698 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 14:52:59,698 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:59" (1/1) ... [2021-12-14 14:52:59,706 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 14:52:59,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:52:59,761 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-14 14:52:59,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-14 14:52:59,830 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 14:52:59,831 INFO L130 BoogieDeclarations]: Found specification of procedure error [2021-12-14 14:52:59,831 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2021-12-14 14:52:59,831 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-12-14 14:52:59,831 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-12-14 14:52:59,831 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-12-14 14:52:59,831 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-12-14 14:52:59,832 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-14 14:52:59,832 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-14 14:52:59,832 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-12-14 14:52:59,832 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-12-14 14:52:59,832 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-12-14 14:52:59,832 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-12-14 14:52:59,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 14:52:59,832 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-12-14 14:52:59,833 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-12-14 14:52:59,833 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 14:52:59,833 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 14:52:59,979 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 14:52:59,980 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 14:53:00,396 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 14:53:00,403 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 14:53:00,403 INFO L301 CfgBuilder]: Removed 11 assume(true) statements. [2021-12-14 14:53:00,405 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:53:00 BoogieIcfgContainer [2021-12-14 14:53:00,405 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 14:53:00,406 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 14:53:00,406 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 14:53:00,409 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 14:53:00,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 02:52:59" (1/3) ... [2021-12-14 14:53:00,409 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f8de84c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:53:00, skipping insertion in model container [2021-12-14 14:53:00,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:59" (2/3) ... [2021-12-14 14:53:00,410 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f8de84c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:53:00, skipping insertion in model container [2021-12-14 14:53:00,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:53:00" (3/3) ... [2021-12-14 14:53:00,411 INFO L111 eAbstractionObserver]: Analyzing ICFG token_ring.08.cil-2.c [2021-12-14 14:53:00,414 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 14:53:00,415 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 14:53:00,446 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 14:53:00,451 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-14 14:53:00,451 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 14:53:00,465 INFO L276 IsEmpty]: Start isEmpty. Operand has 290 states, 257 states have (on average 1.6536964980544746) internal successors, (425), 261 states have internal predecessors, (425), 24 states have call successors, (24), 7 states have call predecessors, (24), 7 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2021-12-14 14:53:00,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-14 14:53:00,474 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:53:00,474 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:53:00,475 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:53:00,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:53:00,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1719211472, now seen corresponding path program 1 times [2021-12-14 14:53:00,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:53:00,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490005466] [2021-12-14 14:53:00,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:53:00,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:53:00,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:00,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:53:00,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:00,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 14:53:00,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:00,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-14 14:53:00,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:00,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-14 14:53:00,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:00,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-14 14:53:00,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:00,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:53:00,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:53:00,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490005466] [2021-12-14 14:53:00,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490005466] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:53:00,738 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:53:00,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 14:53:00,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297384323] [2021-12-14 14:53:00,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:53:00,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 14:53:00,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:53:00,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 14:53:00,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 14:53:00,763 INFO L87 Difference]: Start difference. First operand has 290 states, 257 states have (on average 1.6536964980544746) internal successors, (425), 261 states have internal predecessors, (425), 24 states have call successors, (24), 7 states have call predecessors, (24), 7 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) Second operand has 5 states, 5 states have (on average 24.6) internal successors, (123), 3 states have internal predecessors, (123), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:53:01,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:53:01,622 INFO L93 Difference]: Finished difference Result 666 states and 1098 transitions. [2021-12-14 14:53:01,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 14:53:01,624 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.6) internal successors, (123), 3 states have internal predecessors, (123), 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 134 [2021-12-14 14:53:01,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:53:01,634 INFO L225 Difference]: With dead ends: 666 [2021-12-14 14:53:01,635 INFO L226 Difference]: Without dead ends: 382 [2021-12-14 14:53:01,639 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 [2021-12-14 14:53:01,641 INFO L933 BasicCegarLoop]: 488 mSDtfsCounter, 744 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 764 SdHoareTripleChecker+Valid, 815 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-14 14:53:01,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [764 Valid, 815 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-14 14:53:01,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-12-14 14:53:01,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 284. [2021-12-14 14:53:01,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 253 states have (on average 1.565217391304348) internal successors, (396), 255 states have internal predecessors, (396), 24 states have call successors, (24), 7 states have call predecessors, (24), 6 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-14 14:53:01,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 442 transitions. [2021-12-14 14:53:01,693 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 442 transitions. Word has length 134 [2021-12-14 14:53:01,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:53:01,693 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 442 transitions. [2021-12-14 14:53:01,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.6) internal successors, (123), 3 states have internal predecessors, (123), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:53:01,694 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 442 transitions. [2021-12-14 14:53:01,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-14 14:53:01,697 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:53:01,698 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:53:01,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 14:53:01,698 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:53:01,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:53:01,699 INFO L85 PathProgramCache]: Analyzing trace with hash 857377870, now seen corresponding path program 1 times [2021-12-14 14:53:01,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:53:01,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808685674] [2021-12-14 14:53:01,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:53:01,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:53:01,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:01,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:53:01,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:01,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 14:53:01,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:01,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-14 14:53:01,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:01,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-14 14:53:01,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:01,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-14 14:53:01,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:01,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:53:01,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:53:01,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808685674] [2021-12-14 14:53:01,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808685674] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:53:01,860 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:53:01,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 14:53:01,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428487581] [2021-12-14 14:53:01,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:53:01,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 14:53:01,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:53:01,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 14:53:01,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 14:53:01,863 INFO L87 Difference]: Start difference. First operand 284 states and 442 transitions. Second operand has 6 states, 6 states have (on average 20.5) internal successors, (123), 4 states have internal predecessors, (123), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:53:03,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:53:03,409 INFO L93 Difference]: Finished difference Result 1026 states and 1633 transitions. [2021-12-14 14:53:03,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 14:53:03,410 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.5) internal successors, (123), 4 states have internal predecessors, (123), 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 134 [2021-12-14 14:53:03,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:53:03,416 INFO L225 Difference]: With dead ends: 1026 [2021-12-14 14:53:03,416 INFO L226 Difference]: Without dead ends: 758 [2021-12-14 14:53:03,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-14 14:53:03,421 INFO L933 BasicCegarLoop]: 520 mSDtfsCounter, 1109 mSDsluCounter, 780 mSDsCounter, 0 mSdLazyCounter, 1385 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1124 SdHoareTripleChecker+Valid, 1300 SdHoareTripleChecker+Invalid, 1493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-14 14:53:03,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1124 Valid, 1300 Invalid, 1493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1385 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-14 14:53:03,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2021-12-14 14:53:03,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 561. [2021-12-14 14:53:03,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 506 states have (on average 1.5770750988142292) internal successors, (798), 509 states have internal predecessors, (798), 41 states have call successors, (41), 13 states have call predecessors, (41), 13 states have return successors, (42), 39 states have call predecessors, (42), 39 states have call successors, (42) [2021-12-14 14:53:03,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 881 transitions. [2021-12-14 14:53:03,465 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 881 transitions. Word has length 134 [2021-12-14 14:53:03,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:53:03,466 INFO L470 AbstractCegarLoop]: Abstraction has 561 states and 881 transitions. [2021-12-14 14:53:03,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.5) internal successors, (123), 4 states have internal predecessors, (123), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:53:03,466 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 881 transitions. [2021-12-14 14:53:03,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-14 14:53:03,467 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:53:03,467 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:53:03,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 14:53:03,468 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:53:03,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:53:03,468 INFO L85 PathProgramCache]: Analyzing trace with hash -504624566, now seen corresponding path program 1 times [2021-12-14 14:53:03,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:53:03,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323241413] [2021-12-14 14:53:03,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:53:03,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:53:03,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:03,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:53:03,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:03,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 14:53:03,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:03,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-14 14:53:03,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:03,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-14 14:53:03,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:03,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-14 14:53:03,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:03,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:53:03,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:53:03,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323241413] [2021-12-14 14:53:03,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323241413] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:53:03,578 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:53:03,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 14:53:03,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806043117] [2021-12-14 14:53:03,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:53:03,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 14:53:03,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:53:03,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 14:53:03,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 14:53:03,580 INFO L87 Difference]: Start difference. First operand 561 states and 881 transitions. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 5 states have internal predecessors, (123), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:53:05,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:53:05,344 INFO L93 Difference]: Finished difference Result 1689 states and 2691 transitions. [2021-12-14 14:53:05,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 14:53:05,345 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 5 states have internal predecessors, (123), 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 134 [2021-12-14 14:53:05,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:53:05,352 INFO L225 Difference]: With dead ends: 1689 [2021-12-14 14:53:05,353 INFO L226 Difference]: Without dead ends: 1144 [2021-12-14 14:53:05,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 14:53:05,361 INFO L933 BasicCegarLoop]: 743 mSDtfsCounter, 1121 mSDsluCounter, 1498 mSDsCounter, 0 mSdLazyCounter, 2177 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1136 SdHoareTripleChecker+Valid, 2241 SdHoareTripleChecker+Invalid, 2249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 2177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-14 14:53:05,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1136 Valid, 2241 Invalid, 2249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 2177 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-14 14:53:05,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1144 states. [2021-12-14 14:53:05,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1144 to 819. [2021-12-14 14:53:05,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 740 states have (on average 1.5702702702702702) internal successors, (1162), 744 states have internal predecessors, (1162), 58 states have call successors, (58), 19 states have call predecessors, (58), 20 states have return successors, (61), 57 states have call predecessors, (61), 56 states have call successors, (61) [2021-12-14 14:53:05,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 1281 transitions. [2021-12-14 14:53:05,424 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 1281 transitions. Word has length 134 [2021-12-14 14:53:05,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:53:05,426 INFO L470 AbstractCegarLoop]: Abstraction has 819 states and 1281 transitions. [2021-12-14 14:53:05,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 5 states have internal predecessors, (123), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:53:05,426 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 1281 transitions. [2021-12-14 14:53:05,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-14 14:53:05,432 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:53:05,433 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:53:05,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 14:53:05,433 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:53:05,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:53:05,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1424307660, now seen corresponding path program 1 times [2021-12-14 14:53:05,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:53:05,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991513051] [2021-12-14 14:53:05,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:53:05,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:53:05,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:05,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:53:05,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:05,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 14:53:05,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:05,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-14 14:53:05,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:05,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-14 14:53:05,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:05,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-14 14:53:05,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:05,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:53:05,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:53:05,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991513051] [2021-12-14 14:53:05,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991513051] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:53:05,555 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:53:05,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 14:53:05,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333222620] [2021-12-14 14:53:05,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:53:05,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 14:53:05,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:53:05,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 14:53:05,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 14:53:05,557 INFO L87 Difference]: Start difference. First operand 819 states and 1281 transitions. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 5 states have internal predecessors, (123), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:53:07,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:53:07,232 INFO L93 Difference]: Finished difference Result 2666 states and 4239 transitions. [2021-12-14 14:53:07,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 14:53:07,233 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 5 states have internal predecessors, (123), 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 134 [2021-12-14 14:53:07,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:53:07,240 INFO L225 Difference]: With dead ends: 2666 [2021-12-14 14:53:07,241 INFO L226 Difference]: Without dead ends: 1863 [2021-12-14 14:53:07,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 14:53:07,243 INFO L933 BasicCegarLoop]: 548 mSDtfsCounter, 1200 mSDsluCounter, 1001 mSDsCounter, 0 mSdLazyCounter, 1934 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1215 SdHoareTripleChecker+Valid, 1549 SdHoareTripleChecker+Invalid, 2041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-14 14:53:07,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1215 Valid, 1549 Invalid, 2041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1934 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-14 14:53:07,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1863 states. [2021-12-14 14:53:07,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1863 to 1336. [2021-12-14 14:53:07,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1336 states, 1209 states have (on average 1.564102564102564) internal successors, (1891), 1215 states have internal predecessors, (1891), 92 states have call successors, (92), 31 states have call predecessors, (92), 34 states have return successors, (103), 93 states have call predecessors, (103), 90 states have call successors, (103) [2021-12-14 14:53:07,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1336 states to 1336 states and 2086 transitions. [2021-12-14 14:53:07,296 INFO L78 Accepts]: Start accepts. Automaton has 1336 states and 2086 transitions. Word has length 134 [2021-12-14 14:53:07,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:53:07,297 INFO L470 AbstractCegarLoop]: Abstraction has 1336 states and 2086 transitions. [2021-12-14 14:53:07,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 5 states have internal predecessors, (123), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:53:07,297 INFO L276 IsEmpty]: Start isEmpty. Operand 1336 states and 2086 transitions. [2021-12-14 14:53:07,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-14 14:53:07,298 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:53:07,298 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:53:07,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 14:53:07,299 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:53:07,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:53:07,299 INFO L85 PathProgramCache]: Analyzing trace with hash -868773366, now seen corresponding path program 1 times [2021-12-14 14:53:07,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:53:07,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550087556] [2021-12-14 14:53:07,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:53:07,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:53:07,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:07,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:53:07,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:07,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 14:53:07,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:07,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-14 14:53:07,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:07,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-14 14:53:07,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:07,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-14 14:53:07,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:07,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:53:07,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:53:07,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550087556] [2021-12-14 14:53:07,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550087556] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:53:07,405 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:53:07,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 14:53:07,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632940491] [2021-12-14 14:53:07,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:53:07,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 14:53:07,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:53:07,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 14:53:07,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 14:53:07,407 INFO L87 Difference]: Start difference. First operand 1336 states and 2086 transitions. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 5 states have internal predecessors, (123), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:53:09,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:53:09,235 INFO L93 Difference]: Finished difference Result 4547 states and 7204 transitions. [2021-12-14 14:53:09,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 14:53:09,235 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 5 states have internal predecessors, (123), 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 134 [2021-12-14 14:53:09,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:53:09,246 INFO L225 Difference]: With dead ends: 4547 [2021-12-14 14:53:09,246 INFO L226 Difference]: Without dead ends: 3227 [2021-12-14 14:53:09,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 14:53:09,250 INFO L933 BasicCegarLoop]: 733 mSDtfsCounter, 1113 mSDsluCounter, 1494 mSDsCounter, 0 mSdLazyCounter, 2183 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1128 SdHoareTripleChecker+Valid, 2227 SdHoareTripleChecker+Invalid, 2257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 2183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-14 14:53:09,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1128 Valid, 2227 Invalid, 2257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 2183 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-14 14:53:09,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3227 states. [2021-12-14 14:53:09,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3227 to 2371. [2021-12-14 14:53:09,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2371 states, 2148 states have (on average 1.559124767225326) internal successors, (3349), 2158 states have internal predecessors, (3349), 160 states have call successors, (160), 55 states have call predecessors, (160), 62 states have return successors, (193), 165 states have call predecessors, (193), 158 states have call successors, (193) [2021-12-14 14:53:09,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2371 states to 2371 states and 3702 transitions. [2021-12-14 14:53:09,335 INFO L78 Accepts]: Start accepts. Automaton has 2371 states and 3702 transitions. Word has length 134 [2021-12-14 14:53:09,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:53:09,336 INFO L470 AbstractCegarLoop]: Abstraction has 2371 states and 3702 transitions. [2021-12-14 14:53:09,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 5 states have internal predecessors, (123), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:53:09,336 INFO L276 IsEmpty]: Start isEmpty. Operand 2371 states and 3702 transitions. [2021-12-14 14:53:09,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-14 14:53:09,338 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:53:09,338 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:53:09,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 14:53:09,339 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:53:09,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:53:09,340 INFO L85 PathProgramCache]: Analyzing trace with hash 858371596, now seen corresponding path program 1 times [2021-12-14 14:53:09,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:53:09,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289730088] [2021-12-14 14:53:09,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:53:09,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:53:09,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:09,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:53:09,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:09,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 14:53:09,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:09,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-14 14:53:09,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:09,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-14 14:53:09,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:09,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-14 14:53:09,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:09,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:53:09,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:53:09,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289730088] [2021-12-14 14:53:09,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289730088] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:53:09,463 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:53:09,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 14:53:09,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279331389] [2021-12-14 14:53:09,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:53:09,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 14:53:09,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:53:09,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 14:53:09,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 14:53:09,464 INFO L87 Difference]: Start difference. First operand 2371 states and 3702 transitions. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 5 states have internal predecessors, (123), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:53:10,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:53:10,883 INFO L93 Difference]: Finished difference Result 8308 states and 13150 transitions. [2021-12-14 14:53:10,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 14:53:10,884 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 5 states have internal predecessors, (123), 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 134 [2021-12-14 14:53:10,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:53:10,905 INFO L225 Difference]: With dead ends: 8308 [2021-12-14 14:53:10,905 INFO L226 Difference]: Without dead ends: 5953 [2021-12-14 14:53:10,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 14:53:10,913 INFO L933 BasicCegarLoop]: 729 mSDtfsCounter, 1109 mSDsluCounter, 1494 mSDsCounter, 0 mSdLazyCounter, 2178 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1124 SdHoareTripleChecker+Valid, 2223 SdHoareTripleChecker+Invalid, 2252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 2178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:53:10,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1124 Valid, 2223 Invalid, 2252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 2178 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-14 14:53:10,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5953 states. [2021-12-14 14:53:11,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5953 to 4446. [2021-12-14 14:53:11,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4446 states, 4031 states have (on average 1.555693376333416) internal successors, (6271), 4049 states have internal predecessors, (6271), 296 states have call successors, (296), 103 states have call predecessors, (296), 118 states have return successors, (391), 309 states have call predecessors, (391), 294 states have call successors, (391) [2021-12-14 14:53:11,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4446 states to 4446 states and 6958 transitions. [2021-12-14 14:53:11,139 INFO L78 Accepts]: Start accepts. Automaton has 4446 states and 6958 transitions. Word has length 134 [2021-12-14 14:53:11,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:53:11,140 INFO L470 AbstractCegarLoop]: Abstraction has 4446 states and 6958 transitions. [2021-12-14 14:53:11,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 5 states have internal predecessors, (123), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:53:11,140 INFO L276 IsEmpty]: Start isEmpty. Operand 4446 states and 6958 transitions. [2021-12-14 14:53:11,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-14 14:53:11,144 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:53:11,144 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:53:11,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 14:53:11,145 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:53:11,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:53:11,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1329727946, now seen corresponding path program 1 times [2021-12-14 14:53:11,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:53:11,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322484321] [2021-12-14 14:53:11,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:53:11,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:53:11,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:11,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:53:11,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:11,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 14:53:11,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:11,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-14 14:53:11,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:11,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-14 14:53:11,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:11,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-14 14:53:11,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:11,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:53:11,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:53:11,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322484321] [2021-12-14 14:53:11,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322484321] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:53:11,239 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:53:11,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 14:53:11,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550455065] [2021-12-14 14:53:11,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:53:11,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 14:53:11,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:53:11,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 14:53:11,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 14:53:11,241 INFO L87 Difference]: Start difference. First operand 4446 states and 6958 transitions. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 5 states have internal predecessors, (123), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:53:13,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:53:13,103 INFO L93 Difference]: Finished difference Result 15829 states and 25100 transitions. [2021-12-14 14:53:13,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 14:53:13,104 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 5 states have internal predecessors, (123), 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 134 [2021-12-14 14:53:13,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:53:13,148 INFO L225 Difference]: With dead ends: 15829 [2021-12-14 14:53:13,148 INFO L226 Difference]: Without dead ends: 11399 [2021-12-14 14:53:13,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 14:53:13,162 INFO L933 BasicCegarLoop]: 725 mSDtfsCounter, 1105 mSDsluCounter, 1494 mSDsCounter, 0 mSdLazyCounter, 2173 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1120 SdHoareTripleChecker+Valid, 2219 SdHoareTripleChecker+Invalid, 2247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 2173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-14 14:53:13,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1120 Valid, 2219 Invalid, 2247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 2173 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-14 14:53:13,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11399 states. [2021-12-14 14:53:13,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11399 to 8609. [2021-12-14 14:53:13,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8609 states, 7810 states have (on average 1.5535211267605633) internal successors, (12133), 7844 states have internal predecessors, (12133), 568 states have call successors, (568), 199 states have call predecessors, (568), 230 states have return successors, (841), 597 states have call predecessors, (841), 566 states have call successors, (841) [2021-12-14 14:53:13,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8609 states to 8609 states and 13542 transitions. [2021-12-14 14:53:13,609 INFO L78 Accepts]: Start accepts. Automaton has 8609 states and 13542 transitions. Word has length 134 [2021-12-14 14:53:13,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:53:13,610 INFO L470 AbstractCegarLoop]: Abstraction has 8609 states and 13542 transitions. [2021-12-14 14:53:13,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 5 states have internal predecessors, (123), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:53:13,610 INFO L276 IsEmpty]: Start isEmpty. Operand 8609 states and 13542 transitions. [2021-12-14 14:53:13,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-14 14:53:13,616 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:53:13,616 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:53:13,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 14:53:13,617 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:53:13,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:53:13,617 INFO L85 PathProgramCache]: Analyzing trace with hash -317634996, now seen corresponding path program 1 times [2021-12-14 14:53:13,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:53:13,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68807686] [2021-12-14 14:53:13,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:53:13,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:53:13,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:13,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:53:13,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:13,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 14:53:13,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:13,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-14 14:53:13,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:13,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-14 14:53:13,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:13,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-14 14:53:13,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:13,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:53:13,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:53:13,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68807686] [2021-12-14 14:53:13,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68807686] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:53:13,716 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:53:13,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 14:53:13,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376572401] [2021-12-14 14:53:13,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:53:13,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 14:53:13,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:53:13,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 14:53:13,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 14:53:13,718 INFO L87 Difference]: Start difference. First operand 8609 states and 13542 transitions. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 5 states have internal predecessors, (123), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:53:16,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:53:16,131 INFO L93 Difference]: Finished difference Result 30870 states and 49190 transitions. [2021-12-14 14:53:16,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 14:53:16,132 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 5 states have internal predecessors, (123), 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 134 [2021-12-14 14:53:16,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:53:16,209 INFO L225 Difference]: With dead ends: 30870 [2021-12-14 14:53:16,209 INFO L226 Difference]: Without dead ends: 22277 [2021-12-14 14:53:16,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 14:53:16,240 INFO L933 BasicCegarLoop]: 719 mSDtfsCounter, 1104 mSDsluCounter, 1494 mSDsCounter, 0 mSdLazyCounter, 2165 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1119 SdHoareTripleChecker+Valid, 2213 SdHoareTripleChecker+Invalid, 2242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 2165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-14 14:53:16,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1119 Valid, 2213 Invalid, 2242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 2165 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-14 14:53:16,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22277 states. [2021-12-14 14:53:17,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22277 to 16964. [2021-12-14 14:53:17,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16964 states, 15397 states have (on average 1.5521854906800026) internal successors, (23899), 15463 states have internal predecessors, (23899), 1112 states have call successors, (1112), 391 states have call predecessors, (1112), 454 states have return successors, (1903), 1173 states have call predecessors, (1903), 1110 states have call successors, (1903) [2021-12-14 14:53:17,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16964 states to 16964 states and 26914 transitions. [2021-12-14 14:53:17,123 INFO L78 Accepts]: Start accepts. Automaton has 16964 states and 26914 transitions. Word has length 134 [2021-12-14 14:53:17,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:53:17,124 INFO L470 AbstractCegarLoop]: Abstraction has 16964 states and 26914 transitions. [2021-12-14 14:53:17,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 5 states have internal predecessors, (123), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:53:17,125 INFO L276 IsEmpty]: Start isEmpty. Operand 16964 states and 26914 transitions. [2021-12-14 14:53:17,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-14 14:53:17,135 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:53:17,135 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:53:17,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 14:53:17,135 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:53:17,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:53:17,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1845981578, now seen corresponding path program 1 times [2021-12-14 14:53:17,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:53:17,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95772024] [2021-12-14 14:53:17,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:53:17,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:53:17,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:17,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:53:17,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:17,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 14:53:17,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:17,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-14 14:53:17,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:17,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-14 14:53:17,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:17,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-14 14:53:17,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:17,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:53:17,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:53:17,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95772024] [2021-12-14 14:53:17,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95772024] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:53:17,235 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:53:17,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 14:53:17,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414875196] [2021-12-14 14:53:17,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:53:17,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 14:53:17,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:53:17,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 14:53:17,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 14:53:17,239 INFO L87 Difference]: Start difference. First operand 16964 states and 26914 transitions. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 5 states have internal predecessors, (123), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:53:20,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:53:20,643 INFO L93 Difference]: Finished difference Result 60888 states and 97844 transitions. [2021-12-14 14:53:20,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 14:53:20,644 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 5 states have internal predecessors, (123), 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 134 [2021-12-14 14:53:20,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:53:20,794 INFO L225 Difference]: With dead ends: 60888 [2021-12-14 14:53:20,795 INFO L226 Difference]: Without dead ends: 43940 [2021-12-14 14:53:20,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 14:53:20,850 INFO L933 BasicCegarLoop]: 711 mSDtfsCounter, 1099 mSDsluCounter, 1494 mSDsCounter, 0 mSdLazyCounter, 2145 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1114 SdHoareTripleChecker+Valid, 2205 SdHoareTripleChecker+Invalid, 2223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 2145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-14 14:53:20,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1114 Valid, 2205 Invalid, 2223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 2145 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-14 14:53:20,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43940 states. [2021-12-14 14:53:22,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43940 to 33800. [2021-12-14 14:53:22,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33800 states, 30697 states have (on average 1.5523015278365964) internal successors, (47651), 30827 states have internal predecessors, (47651), 2200 states have call successors, (2200), 775 states have call predecessors, (2200), 902 states have return successors, (4513), 2325 states have call predecessors, (4513), 2198 states have call successors, (4513) [2021-12-14 14:53:22,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33800 states to 33800 states and 54364 transitions. [2021-12-14 14:53:22,372 INFO L78 Accepts]: Start accepts. Automaton has 33800 states and 54364 transitions. Word has length 134 [2021-12-14 14:53:22,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:53:22,373 INFO L470 AbstractCegarLoop]: Abstraction has 33800 states and 54364 transitions. [2021-12-14 14:53:22,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 5 states have internal predecessors, (123), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:53:22,373 INFO L276 IsEmpty]: Start isEmpty. Operand 33800 states and 54364 transitions. [2021-12-14 14:53:22,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-14 14:53:22,391 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:53:22,391 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:53:22,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-14 14:53:22,392 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:53:22,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:53:22,394 INFO L85 PathProgramCache]: Analyzing trace with hash -127183800, now seen corresponding path program 1 times [2021-12-14 14:53:22,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:53:22,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214401735] [2021-12-14 14:53:22,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:53:22,394 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:53:22,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:22,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:53:22,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:22,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 14:53:22,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:22,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-14 14:53:22,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:22,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-14 14:53:22,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:22,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-14 14:53:22,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:22,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:53:22,498 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:53:22,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214401735] [2021-12-14 14:53:22,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214401735] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:53:22,499 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:53:22,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 14:53:22,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982469281] [2021-12-14 14:53:22,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:53:22,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 14:53:22,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:53:22,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 14:53:22,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 14:53:22,500 INFO L87 Difference]: Start difference. First operand 33800 states and 54364 transitions. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 5 states have internal predecessors, (123), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:53:29,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:53:29,093 INFO L93 Difference]: Finished difference Result 136542 states and 220810 transitions. [2021-12-14 14:53:29,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 14:53:29,093 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 5 states have internal predecessors, (123), 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 134 [2021-12-14 14:53:29,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:53:29,567 INFO L225 Difference]: With dead ends: 136542 [2021-12-14 14:53:29,567 INFO L226 Difference]: Without dead ends: 102758 [2021-12-14 14:53:29,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-14 14:53:29,686 INFO L933 BasicCegarLoop]: 704 mSDtfsCounter, 1428 mSDsluCounter, 1486 mSDsCounter, 0 mSdLazyCounter, 2130 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1452 SdHoareTripleChecker+Valid, 2190 SdHoareTripleChecker+Invalid, 2213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 2130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-14 14:53:29,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1452 Valid, 2190 Invalid, 2213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 2130 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-14 14:53:29,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102758 states. [2021-12-14 14:53:33,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102758 to 67213. [2021-12-14 14:53:33,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67213 states, 61166 states have (on average 1.554540103979335) internal successors, (95085), 61424 states have internal predecessors, (95085), 4248 states have call successors, (4248), 1543 states have call predecessors, (4248), 1798 states have return successors, (11063), 4501 states have call predecessors, (11063), 4246 states have call successors, (11063) [2021-12-14 14:53:33,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67213 states to 67213 states and 110396 transitions. [2021-12-14 14:53:33,711 INFO L78 Accepts]: Start accepts. Automaton has 67213 states and 110396 transitions. Word has length 134 [2021-12-14 14:53:33,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:53:33,712 INFO L470 AbstractCegarLoop]: Abstraction has 67213 states and 110396 transitions. [2021-12-14 14:53:33,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 5 states have internal predecessors, (123), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:53:33,712 INFO L276 IsEmpty]: Start isEmpty. Operand 67213 states and 110396 transitions. [2021-12-14 14:53:33,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-14 14:53:33,753 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:53:33,753 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:53:33,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-14 14:53:33,753 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:53:33,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:53:33,754 INFO L85 PathProgramCache]: Analyzing trace with hash 2025923018, now seen corresponding path program 1 times [2021-12-14 14:53:33,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:53:33,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561157684] [2021-12-14 14:53:33,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:53:33,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:53:33,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:33,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:53:33,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:33,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 14:53:33,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:33,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-14 14:53:33,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:33,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-14 14:53:33,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:33,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-14 14:53:33,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:33,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:53:33,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:53:33,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561157684] [2021-12-14 14:53:33,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561157684] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:53:33,850 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:53:33,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 14:53:33,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533108590] [2021-12-14 14:53:33,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:53:33,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 14:53:33,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:53:33,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 14:53:33,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 14:53:33,852 INFO L87 Difference]: Start difference. First operand 67213 states and 110396 transitions. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 5 states have internal predecessors, (123), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:53:45,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:53:45,208 INFO L93 Difference]: Finished difference Result 268137 states and 442424 transitions. [2021-12-14 14:53:45,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 14:53:45,209 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 5 states have internal predecessors, (123), 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 134 [2021-12-14 14:53:45,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:53:46,061 INFO L225 Difference]: With dead ends: 268137 [2021-12-14 14:53:46,062 INFO L226 Difference]: Without dead ends: 200940 [2021-12-14 14:53:46,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-14 14:53:46,289 INFO L933 BasicCegarLoop]: 658 mSDtfsCounter, 1246 mSDsluCounter, 1021 mSDsCounter, 0 mSdLazyCounter, 2270 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1260 SdHoareTripleChecker+Valid, 1679 SdHoareTripleChecker+Invalid, 2378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 2270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-14 14:53:46,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1260 Valid, 1679 Invalid, 2378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 2270 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-14 14:53:46,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200940 states. [2021-12-14 14:53:52,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200940 to 131350. [2021-12-14 14:53:52,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131350 states, 119543 states have (on average 1.5515002969642722) internal successors, (185471), 120057 states have internal predecessors, (185471), 8216 states have call successors, (8216), 3079 states have call predecessors, (8216), 3590 states have return successors, (28409), 8725 states have call predecessors, (28409), 8214 states have call successors, (28409) [2021-12-14 14:53:53,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131350 states to 131350 states and 222096 transitions. [2021-12-14 14:53:53,511 INFO L78 Accepts]: Start accepts. Automaton has 131350 states and 222096 transitions. Word has length 134 [2021-12-14 14:53:53,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:53:53,511 INFO L470 AbstractCegarLoop]: Abstraction has 131350 states and 222096 transitions. [2021-12-14 14:53:53,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 5 states have internal predecessors, (123), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:53:53,512 INFO L276 IsEmpty]: Start isEmpty. Operand 131350 states and 222096 transitions. [2021-12-14 14:53:53,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-14 14:53:53,591 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:53:53,591 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:53:53,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-14 14:53:53,592 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:53:53,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:53:53,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1402641416, now seen corresponding path program 1 times [2021-12-14 14:53:53,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:53:53,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727632772] [2021-12-14 14:53:53,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:53:53,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:53:53,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:53,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:53:53,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:53,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 14:53:53,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:53,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-14 14:53:53,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:53,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-14 14:53:53,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:53,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-14 14:53:53,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:53,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:53:53,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:53:53,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727632772] [2021-12-14 14:53:53,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727632772] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:53:53,892 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:53:53,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 14:53:53,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106816611] [2021-12-14 14:53:53,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:53:53,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 14:53:53,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:53:53,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 14:53:53,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 14:53:53,894 INFO L87 Difference]: Start difference. First operand 131350 states and 222096 transitions. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 5 states have internal predecessors, (123), 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)