./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/systemc/token_ring.11.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/systemc/token_ring.11.cil-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 79f20a4b12634e812af836a5fe92e9d987e7766e2c28337c49504608346f2347 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 15:40:29,033 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 15:40:29,035 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 15:40:29,078 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 15:40:29,079 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 15:40:29,081 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 15:40:29,082 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 15:40:29,084 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 15:40:29,085 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 15:40:29,088 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 15:40:29,089 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 15:40:29,090 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 15:40:29,090 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 15:40:29,092 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 15:40:29,093 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 15:40:29,095 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 15:40:29,096 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 15:40:29,097 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 15:40:29,098 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 15:40:29,102 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 15:40:29,103 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 15:40:29,104 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 15:40:29,105 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 15:40:29,106 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 15:40:29,111 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 15:40:29,111 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 15:40:29,111 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 15:40:29,112 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 15:40:29,112 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 15:40:29,113 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 15:40:29,113 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 15:40:29,114 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 15:40:29,115 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 15:40:29,116 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 15:40:29,116 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 15:40:29,117 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 15:40:29,117 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 15:40:29,117 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 15:40:29,117 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 15:40:29,118 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 15:40:29,119 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 15:40:29,120 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 15:40:29,144 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 15:40:29,144 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 15:40:29,145 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 15:40:29,145 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 15:40:29,146 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 15:40:29,146 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 15:40:29,147 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 15:40:29,147 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 15:40:29,147 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 15:40:29,147 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 15:40:29,148 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 15:40:29,148 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 15:40:29,148 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 15:40:29,148 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 15:40:29,148 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 15:40:29,149 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 15:40:29,149 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 15:40:29,149 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 15:40:29,149 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 15:40:29,149 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 15:40:29,149 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 15:40:29,150 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 15:40:29,150 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 15:40:29,150 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 15:40:29,150 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 15:40:29,150 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 15:40:29,150 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 15:40:29,151 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 15:40:29,152 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 15:40:29,152 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 15:40:29,152 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 15:40:29,152 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 15:40:29,152 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 15:40:29,153 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 15:40:29,153 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 79f20a4b12634e812af836a5fe92e9d987e7766e2c28337c49504608346f2347 [2021-12-17 15:40:29,343 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 15:40:29,359 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 15:40:29,361 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 15:40:29,362 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 15:40:29,362 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 15:40:29,363 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/systemc/token_ring.11.cil-1.c [2021-12-17 15:40:29,398 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/060e18b17/4fd34b12b93e481e8a134976c6db9cab/FLAG9d04b0c5c [2021-12-17 15:40:29,802 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 15:40:29,807 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/token_ring.11.cil-1.c [2021-12-17 15:40:29,824 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/060e18b17/4fd34b12b93e481e8a134976c6db9cab/FLAG9d04b0c5c [2021-12-17 15:40:29,836 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/060e18b17/4fd34b12b93e481e8a134976c6db9cab [2021-12-17 15:40:29,838 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 15:40:29,840 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 15:40:29,842 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 15:40:29,842 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 15:40:29,844 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 15:40:29,845 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 03:40:29" (1/1) ... [2021-12-17 15:40:29,845 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5944b02b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:40:29, skipping insertion in model container [2021-12-17 15:40:29,845 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 03:40:29" (1/1) ... [2021-12-17 15:40:29,850 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 15:40:29,886 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 15:40:30,044 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.11.cil-1.c[671,684] [2021-12-17 15:40:30,151 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 15:40:30,165 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 15:40:30,174 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.11.cil-1.c[671,684] [2021-12-17 15:40:30,247 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 15:40:30,268 INFO L208 MainTranslator]: Completed translation [2021-12-17 15:40:30,270 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:40:30 WrapperNode [2021-12-17 15:40:30,270 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 15:40:30,271 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 15:40:30,271 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 15:40:30,271 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 15:40:30,277 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:40:30" (1/1) ... [2021-12-17 15:40:30,301 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:40:30" (1/1) ... [2021-12-17 15:40:30,332 INFO L137 Inliner]: procedures = 50, calls = 65, calls flagged for inlining = 33, calls inlined = 33, statements flattened = 800 [2021-12-17 15:40:30,333 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 15:40:30,334 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 15:40:30,334 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 15:40:30,334 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 15:40:30,340 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:40:30" (1/1) ... [2021-12-17 15:40:30,340 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:40:30" (1/1) ... [2021-12-17 15:40:30,353 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:40:30" (1/1) ... [2021-12-17 15:40:30,354 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:40:30" (1/1) ... [2021-12-17 15:40:30,368 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:40:30" (1/1) ... [2021-12-17 15:40:30,393 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:40:30" (1/1) ... [2021-12-17 15:40:30,395 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:40:30" (1/1) ... [2021-12-17 15:40:30,398 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 15:40:30,398 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 15:40:30,400 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 15:40:30,400 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 15:40:30,404 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:40:30" (1/1) ... [2021-12-17 15:40:30,425 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 15:40:30,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:40:30,443 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) [2021-12-17 15:40:30,445 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 [2021-12-17 15:40:30,474 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 15:40:30,474 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-12-17 15:40:30,474 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-12-17 15:40:30,475 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-17 15:40:30,475 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-17 15:40:30,475 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-12-17 15:40:30,475 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-12-17 15:40:30,475 INFO L130 BoogieDeclarations]: Found specification of procedure error [2021-12-17 15:40:30,476 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2021-12-17 15:40:30,476 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-12-17 15:40:30,476 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-12-17 15:40:30,476 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-12-17 15:40:30,476 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-12-17 15:40:30,476 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-12-17 15:40:30,476 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-12-17 15:40:30,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 15:40:30,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 15:40:30,477 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 15:40:30,584 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 15:40:30,586 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 15:40:31,119 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 15:40:31,125 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 15:40:31,125 INFO L301 CfgBuilder]: Removed 14 assume(true) statements. [2021-12-17 15:40:31,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 03:40:31 BoogieIcfgContainer [2021-12-17 15:40:31,134 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 15:40:31,135 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 15:40:31,135 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 15:40:31,138 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 15:40:31,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 03:40:29" (1/3) ... [2021-12-17 15:40:31,139 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5864ddc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 03:40:31, skipping insertion in model container [2021-12-17 15:40:31,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:40:30" (2/3) ... [2021-12-17 15:40:31,139 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5864ddc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 03:40:31, skipping insertion in model container [2021-12-17 15:40:31,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 03:40:31" (3/3) ... [2021-12-17 15:40:31,140 INFO L111 eAbstractionObserver]: Analyzing ICFG token_ring.11.cil-1.c [2021-12-17 15:40:31,143 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 15:40:31,144 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 15:40:31,178 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 15:40:31,182 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 [2021-12-17 15:40:31,183 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 15:40:31,197 INFO L276 IsEmpty]: Start isEmpty. Operand has 365 states, 329 states have (on average 1.6656534954407294) internal successors, (548), 333 states have internal predecessors, (548), 27 states have call successors, (27), 7 states have call predecessors, (27), 7 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2021-12-17 15:40:31,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-17 15:40:31,206 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:40:31,209 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:40:31,209 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:40:31,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:40:31,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1184311821, now seen corresponding path program 1 times [2021-12-17 15:40:31,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:40:31,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233405558] [2021-12-17 15:40:31,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:40:31,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:40:31,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:40:31,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:40:31,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:40:31,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 15:40:31,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:40:31,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 15:40:31,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:40:31,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-17 15:40:31,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:40:31,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-12-17 15:40:31,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:40:31,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:40:31,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:40:31,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233405558] [2021-12-17 15:40:31,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233405558] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:40:31,618 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:40:31,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 15:40:31,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315360697] [2021-12-17 15:40:31,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:40:31,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 15:40:31,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:40:31,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 15:40:31,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 15:40:31,662 INFO L87 Difference]: Start difference. First operand has 365 states, 329 states have (on average 1.6656534954407294) internal successors, (548), 333 states have internal predecessors, (548), 27 states have call successors, (27), 7 states have call predecessors, (27), 7 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) Second operand has 5 states, 5 states have (on average 31.2) internal successors, (156), 3 states have internal predecessors, (156), 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) [2021-12-17 15:40:32,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:40:32,784 INFO L93 Difference]: Finished difference Result 851 states and 1417 transitions. [2021-12-17 15:40:32,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 15:40:32,787 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.2) internal successors, (156), 3 states have internal predecessors, (156), 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 167 [2021-12-17 15:40:32,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:40:32,798 INFO L225 Difference]: With dead ends: 851 [2021-12-17 15:40:32,798 INFO L226 Difference]: Without dead ends: 490 [2021-12-17 15:40:32,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-17 15:40:32,805 INFO L933 BasicCegarLoop]: 626 mSDtfsCounter, 971 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 994 SdHoareTripleChecker+Valid, 1034 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-17 15:40:32,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [994 Valid, 1034 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-17 15:40:32,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-12-17 15:40:32,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 359. [2021-12-17 15:40:32,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 325 states have (on average 1.5784615384615384) internal successors, (513), 327 states have internal predecessors, (513), 27 states have call successors, (27), 7 states have call predecessors, (27), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-17 15:40:32,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 565 transitions. [2021-12-17 15:40:32,860 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 565 transitions. Word has length 167 [2021-12-17 15:40:32,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:40:32,861 INFO L470 AbstractCegarLoop]: Abstraction has 359 states and 565 transitions. [2021-12-17 15:40:32,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.2) internal successors, (156), 3 states have internal predecessors, (156), 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) [2021-12-17 15:40:32,861 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 565 transitions. [2021-12-17 15:40:32,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-17 15:40:32,864 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:40:32,864 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:40:32,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 15:40:32,865 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:40:32,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:40:32,866 INFO L85 PathProgramCache]: Analyzing trace with hash -915426609, now seen corresponding path program 1 times [2021-12-17 15:40:32,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:40:32,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811665050] [2021-12-17 15:40:32,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:40:32,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:40:32,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:40:32,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:40:32,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:40:32,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 15:40:32,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:40:33,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 15:40:33,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:40:33,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-17 15:40:33,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:40:33,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-12-17 15:40:33,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:40:33,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:40:33,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:40:33,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811665050] [2021-12-17 15:40:33,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811665050] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:40:33,049 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:40:33,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 15:40:33,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596921827] [2021-12-17 15:40:33,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:40:33,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 15:40:33,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:40:33,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 15:40:33,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 15:40:33,052 INFO L87 Difference]: Start difference. First operand 359 states and 565 transitions. Second operand has 5 states, 5 states have (on average 31.2) internal successors, (156), 3 states have internal predecessors, (156), 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) [2021-12-17 15:40:34,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:40:34,023 INFO L93 Difference]: Finished difference Result 833 states and 1329 transitions. [2021-12-17 15:40:34,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 15:40:34,023 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.2) internal successors, (156), 3 states have internal predecessors, (156), 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 167 [2021-12-17 15:40:34,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:40:34,027 INFO L225 Difference]: With dead ends: 833 [2021-12-17 15:40:34,027 INFO L226 Difference]: Without dead ends: 490 [2021-12-17 15:40:34,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-17 15:40:34,029 INFO L933 BasicCegarLoop]: 621 mSDtfsCounter, 958 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 981 SdHoareTripleChecker+Valid, 1020 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-17 15:40:34,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [981 Valid, 1020 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 650 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-17 15:40:34,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-12-17 15:40:34,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 359. [2021-12-17 15:40:34,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 325 states have (on average 1.5753846153846154) internal successors, (512), 327 states have internal predecessors, (512), 27 states have call successors, (27), 7 states have call predecessors, (27), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-17 15:40:34,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 564 transitions. [2021-12-17 15:40:34,053 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 564 transitions. Word has length 167 [2021-12-17 15:40:34,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:40:34,054 INFO L470 AbstractCegarLoop]: Abstraction has 359 states and 564 transitions. [2021-12-17 15:40:34,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.2) internal successors, (156), 3 states have internal predecessors, (156), 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) [2021-12-17 15:40:34,054 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 564 transitions. [2021-12-17 15:40:34,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-17 15:40:34,056 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:40:34,056 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:40:34,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 15:40:34,057 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:40:34,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:40:34,057 INFO L85 PathProgramCache]: Analyzing trace with hash 7740817, now seen corresponding path program 1 times [2021-12-17 15:40:34,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:40:34,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869990209] [2021-12-17 15:40:34,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:40:34,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:40:34,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:40:34,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:40:34,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:40:34,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 15:40:34,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:40:34,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 15:40:34,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:40:34,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-17 15:40:34,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:40:34,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-12-17 15:40:34,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:40:34,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:40:34,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:40:34,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869990209] [2021-12-17 15:40:34,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869990209] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:40:34,244 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:40:34,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 15:40:34,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528803463] [2021-12-17 15:40:34,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:40:34,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 15:40:34,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:40:34,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 15:40:34,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 15:40:34,246 INFO L87 Difference]: Start difference. First operand 359 states and 564 transitions. Second operand has 6 states, 6 states have (on average 26.0) internal successors, (156), 4 states have internal predecessors, (156), 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) [2021-12-17 15:40:36,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:40:36,208 INFO L93 Difference]: Finished difference Result 1317 states and 2115 transitions. [2021-12-17 15:40:36,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 15:40:36,218 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 26.0) internal successors, (156), 4 states have internal predecessors, (156), 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 167 [2021-12-17 15:40:36,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:40:36,222 INFO L225 Difference]: With dead ends: 1317 [2021-12-17 15:40:36,235 INFO L226 Difference]: Without dead ends: 977 [2021-12-17 15:40:36,237 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 [2021-12-17 15:40:36,238 INFO L933 BasicCegarLoop]: 669 mSDtfsCounter, 1453 mSDsluCounter, 976 mSDsCounter, 0 mSdLazyCounter, 1813 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1471 SdHoareTripleChecker+Valid, 1645 SdHoareTripleChecker+Invalid, 1933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-17 15:40:36,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1471 Valid, 1645 Invalid, 1933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1813 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-17 15:40:36,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2021-12-17 15:40:36,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 714. [2021-12-17 15:40:36,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 714 states, 653 states have (on average 1.5880551301684533) internal successors, (1037), 656 states have internal predecessors, (1037), 47 states have call successors, (47), 13 states have call predecessors, (47), 13 states have return successors, (48), 45 states have call predecessors, (48), 45 states have call successors, (48) [2021-12-17 15:40:36,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 1132 transitions. [2021-12-17 15:40:36,275 INFO L78 Accepts]: Start accepts. Automaton has 714 states and 1132 transitions. Word has length 167 [2021-12-17 15:40:36,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:40:36,276 INFO L470 AbstractCegarLoop]: Abstraction has 714 states and 1132 transitions. [2021-12-17 15:40:36,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.0) internal successors, (156), 4 states have internal predecessors, (156), 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) [2021-12-17 15:40:36,276 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states and 1132 transitions. [2021-12-17 15:40:36,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-17 15:40:36,278 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:40:36,278 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:40:36,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 15:40:36,279 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:40:36,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:40:36,279 INFO L85 PathProgramCache]: Analyzing trace with hash 930141325, now seen corresponding path program 1 times [2021-12-17 15:40:36,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:40:36,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074229288] [2021-12-17 15:40:36,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:40:36,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:40:36,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:40:36,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:40:36,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:40:36,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 15:40:36,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:40:36,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 15:40:36,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:40:36,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-17 15:40:36,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:40:36,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-12-17 15:40:36,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:40:36,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:40:36,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:40:36,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074229288] [2021-12-17 15:40:36,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074229288] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:40:36,440 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:40:36,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 15:40:36,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607045983] [2021-12-17 15:40:36,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:40:36,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 15:40:36,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:40:36,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 15:40:36,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 15:40:36,442 INFO L87 Difference]: Start difference. First operand 714 states and 1132 transitions. Second operand has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 5 states have internal predecessors, (156), 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) [2021-12-17 15:40:38,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:40:38,908 INFO L93 Difference]: Finished difference Result 2175 states and 3500 transitions. [2021-12-17 15:40:38,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 15:40:38,908 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 5 states have internal predecessors, (156), 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 167 [2021-12-17 15:40:38,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:40:38,914 INFO L225 Difference]: With dead ends: 2175 [2021-12-17 15:40:38,914 INFO L226 Difference]: Without dead ends: 1480 [2021-12-17 15:40:38,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 15:40:38,917 INFO L933 BasicCegarLoop]: 960 mSDtfsCounter, 1476 mSDsluCounter, 1888 mSDsCounter, 0 mSdLazyCounter, 2853 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1494 SdHoareTripleChecker+Valid, 2848 SdHoareTripleChecker+Invalid, 2930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 2853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-17 15:40:38,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1494 Valid, 2848 Invalid, 2930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 2853 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-17 15:40:38,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1480 states. [2021-12-17 15:40:38,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1480 to 1044. [2021-12-17 15:40:38,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1044 states, 956 states have (on average 1.5815899581589958) internal successors, (1512), 960 states have internal predecessors, (1512), 67 states have call successors, (67), 19 states have call predecessors, (67), 20 states have return successors, (70), 66 states have call predecessors, (70), 65 states have call successors, (70) [2021-12-17 15:40:38,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1044 states to 1044 states and 1649 transitions. [2021-12-17 15:40:38,966 INFO L78 Accepts]: Start accepts. Automaton has 1044 states and 1649 transitions. Word has length 167 [2021-12-17 15:40:38,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:40:38,967 INFO L470 AbstractCegarLoop]: Abstraction has 1044 states and 1649 transitions. [2021-12-17 15:40:38,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 5 states have internal predecessors, (156), 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) [2021-12-17 15:40:38,972 INFO L276 IsEmpty]: Start isEmpty. Operand 1044 states and 1649 transitions. [2021-12-17 15:40:38,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-17 15:40:38,973 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:40:38,973 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:40:38,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 15:40:38,974 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:40:38,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:40:38,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1467846513, now seen corresponding path program 1 times [2021-12-17 15:40:38,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:40:38,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757228844] [2021-12-17 15:40:38,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:40:38,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:40:38,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:40:38,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:40:39,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:40:39,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 15:40:39,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:40:39,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 15:40:39,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:40:39,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-17 15:40:39,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:40:39,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-12-17 15:40:39,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:40:39,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:40:39,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:40:39,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757228844] [2021-12-17 15:40:39,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757228844] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:40:39,122 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:40:39,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 15:40:39,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352489581] [2021-12-17 15:40:39,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:40:39,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 15:40:39,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:40:39,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 15:40:39,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 15:40:39,125 INFO L87 Difference]: Start difference. First operand 1044 states and 1649 transitions. Second operand has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 5 states have internal predecessors, (156), 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) [2021-12-17 15:40:41,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:40:41,439 INFO L93 Difference]: Finished difference Result 3440 states and 5525 transitions. [2021-12-17 15:40:41,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 15:40:41,440 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 5 states have internal predecessors, (156), 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 167 [2021-12-17 15:40:41,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:40:41,451 INFO L225 Difference]: With dead ends: 3440 [2021-12-17 15:40:41,467 INFO L226 Difference]: Without dead ends: 2415 [2021-12-17 15:40:41,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 15:40:41,474 INFO L933 BasicCegarLoop]: 952 mSDtfsCounter, 1473 mSDsluCounter, 1884 mSDsCounter, 0 mSdLazyCounter, 2859 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1491 SdHoareTripleChecker+Valid, 2836 SdHoareTripleChecker+Invalid, 2939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 2859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-17 15:40:41,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1491 Valid, 2836 Invalid, 2939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 2859 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-17 15:40:41,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2415 states. [2021-12-17 15:40:41,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2415 to 1705. [2021-12-17 15:40:41,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1705 states, 1563 states have (on average 1.5758157389635317) internal successors, (2463), 1569 states have internal predecessors, (2463), 107 states have call successors, (107), 31 states have call predecessors, (107), 34 states have return successors, (118), 108 states have call predecessors, (118), 105 states have call successors, (118) [2021-12-17 15:40:41,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1705 states to 1705 states and 2688 transitions. [2021-12-17 15:40:41,624 INFO L78 Accepts]: Start accepts. Automaton has 1705 states and 2688 transitions. Word has length 167 [2021-12-17 15:40:41,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:40:41,625 INFO L470 AbstractCegarLoop]: Abstraction has 1705 states and 2688 transitions. [2021-12-17 15:40:41,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 5 states have internal predecessors, (156), 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) [2021-12-17 15:40:41,626 INFO L276 IsEmpty]: Start isEmpty. Operand 1705 states and 2688 transitions. [2021-12-17 15:40:41,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-17 15:40:41,627 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:40:41,627 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:40:41,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 15:40:41,628 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:40:41,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:40:41,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1129558963, now seen corresponding path program 1 times [2021-12-17 15:40:41,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:40:41,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310158483] [2021-12-17 15:40:41,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:40:41,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:40:41,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:40:41,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:40:41,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:40:41,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 15:40:41,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:40:41,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 15:40:41,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:40:41,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-17 15:40:41,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:40:41,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-12-17 15:40:41,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:40:41,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:40:41,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:40:41,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310158483] [2021-12-17 15:40:41,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310158483] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:40:41,740 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:40:41,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 15:40:41,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172112277] [2021-12-17 15:40:41,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:40:41,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 15:40:41,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:40:41,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 15:40:41,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 15:40:41,742 INFO L87 Difference]: Start difference. First operand 1705 states and 2688 transitions. Second operand has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 5 states have internal predecessors, (156), 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) [2021-12-17 15:40:44,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:40:44,249 INFO L93 Difference]: Finished difference Result 5873 states and 9396 transitions. [2021-12-17 15:40:44,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 15:40:44,250 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 5 states have internal predecessors, (156), 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 167 [2021-12-17 15:40:44,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:40:44,263 INFO L225 Difference]: With dead ends: 5873 [2021-12-17 15:40:44,263 INFO L226 Difference]: Without dead ends: 4187 [2021-12-17 15:40:44,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 15:40:44,267 INFO L933 BasicCegarLoop]: 948 mSDtfsCounter, 1469 mSDsluCounter, 1884 mSDsCounter, 0 mSdLazyCounter, 2854 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1487 SdHoareTripleChecker+Valid, 2832 SdHoareTripleChecker+Invalid, 2934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 2854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-17 15:40:44,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1487 Valid, 2832 Invalid, 2934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 2854 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-17 15:40:44,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4187 states. [2021-12-17 15:40:44,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4187 to 3028. [2021-12-17 15:40:44,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3028 states, 2778 states have (on average 1.5712742980561556) internal successors, (4365), 2788 states have internal predecessors, (4365), 187 states have call successors, (187), 55 states have call predecessors, (187), 62 states have return successors, (220), 192 states have call predecessors, (220), 185 states have call successors, (220) [2021-12-17 15:40:44,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3028 states to 3028 states and 4772 transitions. [2021-12-17 15:40:44,400 INFO L78 Accepts]: Start accepts. Automaton has 3028 states and 4772 transitions. Word has length 167 [2021-12-17 15:40:44,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:40:44,401 INFO L470 AbstractCegarLoop]: Abstraction has 3028 states and 4772 transitions. [2021-12-17 15:40:44,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 5 states have internal predecessors, (156), 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) [2021-12-17 15:40:44,401 INFO L276 IsEmpty]: Start isEmpty. Operand 3028 states and 4772 transitions. [2021-12-17 15:40:44,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-17 15:40:44,403 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:40:44,403 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:40:44,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 15:40:44,404 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:40:44,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:40:44,404 INFO L85 PathProgramCache]: Analyzing trace with hash -703004465, now seen corresponding path program 1 times [2021-12-17 15:40:44,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:40:44,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755969991] [2021-12-17 15:40:44,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:40:44,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:40:44,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:40:44,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:40:44,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:40:44,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 15:40:44,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:40:44,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 15:40:44,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:40:44,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-17 15:40:44,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:40:44,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-12-17 15:40:44,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:40:44,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:40:44,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:40:44,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755969991] [2021-12-17 15:40:44,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755969991] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:40:44,544 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:40:44,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 15:40:44,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135614917] [2021-12-17 15:40:44,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:40:44,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 15:40:44,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:40:44,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 15:40:44,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 15:40:44,548 INFO L87 Difference]: Start difference. First operand 3028 states and 4772 transitions. Second operand has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 5 states have internal predecessors, (156), 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) [2021-12-17 15:40:46,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:40:46,824 INFO L93 Difference]: Finished difference Result 10738 states and 17154 transitions. [2021-12-17 15:40:46,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 15:40:46,825 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 5 states have internal predecessors, (156), 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 167 [2021-12-17 15:40:46,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:40:46,854 INFO L225 Difference]: With dead ends: 10738 [2021-12-17 15:40:46,854 INFO L226 Difference]: Without dead ends: 7729 [2021-12-17 15:40:46,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 15:40:46,866 INFO L933 BasicCegarLoop]: 944 mSDtfsCounter, 1465 mSDsluCounter, 1884 mSDsCounter, 0 mSdLazyCounter, 2849 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1483 SdHoareTripleChecker+Valid, 2828 SdHoareTripleChecker+Invalid, 2929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 2849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-17 15:40:46,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1483 Valid, 2828 Invalid, 2929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 2849 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-17 15:40:46,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7729 states. [2021-12-17 15:40:47,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7729 to 5679. [2021-12-17 15:40:47,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5679 states, 5213 states have (on average 1.5681948973719548) internal successors, (8175), 5231 states have internal predecessors, (8175), 347 states have call successors, (347), 103 states have call predecessors, (347), 118 states have return successors, (442), 360 states have call predecessors, (442), 345 states have call successors, (442) [2021-12-17 15:40:47,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5679 states to 5679 states and 8964 transitions. [2021-12-17 15:40:47,142 INFO L78 Accepts]: Start accepts. Automaton has 5679 states and 8964 transitions. Word has length 167 [2021-12-17 15:40:47,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:40:47,142 INFO L470 AbstractCegarLoop]: Abstraction has 5679 states and 8964 transitions. [2021-12-17 15:40:47,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 5 states have internal predecessors, (156), 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) [2021-12-17 15:40:47,143 INFO L276 IsEmpty]: Start isEmpty. Operand 5679 states and 8964 transitions. [2021-12-17 15:40:47,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-17 15:40:47,146 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:40:47,146 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:40:47,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 15:40:47,146 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:40:47,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:40:47,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1243433971, now seen corresponding path program 1 times [2021-12-17 15:40:47,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:40:47,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46796056] [2021-12-17 15:40:47,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:40:47,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:40:47,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:40:47,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:40:47,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:40:47,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 15:40:47,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:40:47,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 15:40:47,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:40:47,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-17 15:40:47,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:40:47,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-12-17 15:40:47,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:40:47,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:40:47,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:40:47,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46796056] [2021-12-17 15:40:47,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46796056] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:40:47,278 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:40:47,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 15:40:47,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138943753] [2021-12-17 15:40:47,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:40:47,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 15:40:47,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:40:47,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 15:40:47,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 15:40:47,279 INFO L87 Difference]: Start difference. First operand 5679 states and 8964 transitions. Second operand has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 5 states have internal predecessors, (156), 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) [2021-12-17 15:40:50,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:40:50,170 INFO L93 Difference]: Finished difference Result 20467 states and 32728 transitions. [2021-12-17 15:40:50,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 15:40:50,170 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 5 states have internal predecessors, (156), 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 167 [2021-12-17 15:40:50,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:40:50,214 INFO L225 Difference]: With dead ends: 20467 [2021-12-17 15:40:50,214 INFO L226 Difference]: Without dead ends: 14807 [2021-12-17 15:40:50,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 15:40:50,231 INFO L933 BasicCegarLoop]: 938 mSDtfsCounter, 1464 mSDsluCounter, 1884 mSDsCounter, 0 mSdLazyCounter, 2841 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1482 SdHoareTripleChecker+Valid, 2822 SdHoareTripleChecker+Invalid, 2924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 2841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-17 15:40:50,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1482 Valid, 2822 Invalid, 2924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 2841 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-17 15:40:50,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14807 states. [2021-12-17 15:40:50,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14807 to 10994. [2021-12-17 15:40:50,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10994 states, 10096 states have (on average 1.5662638668779714) internal successors, (15813), 10130 states have internal predecessors, (15813), 667 states have call successors, (667), 199 states have call predecessors, (667), 230 states have return successors, (940), 696 states have call predecessors, (940), 665 states have call successors, (940) [2021-12-17 15:40:50,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10994 states to 10994 states and 17420 transitions. [2021-12-17 15:40:50,762 INFO L78 Accepts]: Start accepts. Automaton has 10994 states and 17420 transitions. Word has length 167 [2021-12-17 15:40:50,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:40:50,764 INFO L470 AbstractCegarLoop]: Abstraction has 10994 states and 17420 transitions. [2021-12-17 15:40:50,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 5 states have internal predecessors, (156), 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) [2021-12-17 15:40:50,765 INFO L276 IsEmpty]: Start isEmpty. Operand 10994 states and 17420 transitions. [2021-12-17 15:40:50,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-17 15:40:50,770 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:40:50,770 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:40:50,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 15:40:50,771 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:40:50,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:40:50,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1399414513, now seen corresponding path program 1 times [2021-12-17 15:40:50,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:40:50,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827138853] [2021-12-17 15:40:50,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:40:50,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:40:50,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:40:50,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:40:50,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:40:50,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 15:40:50,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:40:50,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 15:40:50,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:40:50,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-17 15:40:50,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:40:50,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-12-17 15:40:50,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:40:50,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:40:50,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:40:50,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827138853] [2021-12-17 15:40:50,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827138853] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:40:50,884 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:40:50,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 15:40:50,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100772783] [2021-12-17 15:40:50,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:40:50,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 15:40:50,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:40:50,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 15:40:50,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 15:40:50,887 INFO L87 Difference]: Start difference. First operand 10994 states and 17420 transitions. Second operand has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 5 states have internal predecessors, (156), 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) [2021-12-17 15:40:54,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:40:54,108 INFO L93 Difference]: Finished difference Result 39893 states and 64006 transitions. [2021-12-17 15:40:54,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 15:40:54,109 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 5 states have internal predecessors, (156), 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 167 [2021-12-17 15:40:54,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:40:54,203 INFO L225 Difference]: With dead ends: 39893 [2021-12-17 15:40:54,204 INFO L226 Difference]: Without dead ends: 28918 [2021-12-17 15:40:54,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 15:40:54,242 INFO L933 BasicCegarLoop]: 930 mSDtfsCounter, 1459 mSDsluCounter, 1884 mSDsCounter, 0 mSdLazyCounter, 2821 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1477 SdHoareTripleChecker+Valid, 2814 SdHoareTripleChecker+Invalid, 2905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 2821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-17 15:40:54,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1477 Valid, 2814 Invalid, 2905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 2821 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-17 15:40:54,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28918 states. [2021-12-17 15:40:55,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28918 to 21686. [2021-12-17 15:40:55,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21686 states, 19924 states have (on average 1.5658000401525798) internal successors, (31197), 19990 states have internal predecessors, (31197), 1307 states have call successors, (1307), 391 states have call predecessors, (1307), 454 states have return successors, (2098), 1368 states have call predecessors, (2098), 1305 states have call successors, (2098) [2021-12-17 15:40:55,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21686 states to 21686 states and 34602 transitions. [2021-12-17 15:40:55,385 INFO L78 Accepts]: Start accepts. Automaton has 21686 states and 34602 transitions. Word has length 167 [2021-12-17 15:40:55,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:40:55,385 INFO L470 AbstractCegarLoop]: Abstraction has 21686 states and 34602 transitions. [2021-12-17 15:40:55,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 5 states have internal predecessors, (156), 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) [2021-12-17 15:40:55,386 INFO L276 IsEmpty]: Start isEmpty. Operand 21686 states and 34602 transitions. [2021-12-17 15:40:55,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-17 15:40:55,399 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:40:55,399 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:40:55,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 15:40:55,399 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:40:55,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:40:55,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1107682961, now seen corresponding path program 1 times [2021-12-17 15:40:55,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:40:55,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560096470] [2021-12-17 15:40:55,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:40:55,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:40:55,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:40:55,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:40:55,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:40:55,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 15:40:55,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:40:55,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 15:40:55,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:40:55,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-17 15:40:55,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:40:55,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-12-17 15:40:55,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:40:55,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:40:55,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:40:55,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560096470] [2021-12-17 15:40:55,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560096470] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:40:55,546 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:40:55,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 15:40:55,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669967900] [2021-12-17 15:40:55,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:40:55,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 15:40:55,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:40:55,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 15:40:55,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 15:40:55,547 INFO L87 Difference]: Start difference. First operand 21686 states and 34602 transitions. Second operand has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 5 states have internal predecessors, (156), 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) [2021-12-17 15:41:00,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:41:00,301 INFO L93 Difference]: Finished difference Result 78811 states and 127290 transitions. [2021-12-17 15:41:00,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 15:41:00,301 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 5 states have internal predecessors, (156), 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 167 [2021-12-17 15:41:00,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:41:00,521 INFO L225 Difference]: With dead ends: 78811 [2021-12-17 15:41:00,521 INFO L226 Difference]: Without dead ends: 57144 [2021-12-17 15:41:00,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 15:41:00,590 INFO L933 BasicCegarLoop]: 925 mSDtfsCounter, 1458 mSDsluCounter, 1884 mSDsCounter, 0 mSdLazyCounter, 2813 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1476 SdHoareTripleChecker+Valid, 2809 SdHoareTripleChecker+Invalid, 2897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 2813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-17 15:41:00,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1476 Valid, 2809 Invalid, 2897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 2813 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-17 15:41:00,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57144 states. [2021-12-17 15:41:02,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57144 to 43131. [2021-12-17 15:41:02,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43131 states, 39641 states have (on average 1.565424686561893) internal successors, (62055), 39771 states have internal predecessors, (62055), 2587 states have call successors, (2587), 775 states have call predecessors, (2587), 902 states have return successors, (4900), 2712 states have call predecessors, (4900), 2585 states have call successors, (4900) [2021-12-17 15:41:02,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43131 states to 43131 states and 69542 transitions. [2021-12-17 15:41:02,910 INFO L78 Accepts]: Start accepts. Automaton has 43131 states and 69542 transitions. Word has length 167 [2021-12-17 15:41:02,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:41:02,911 INFO L470 AbstractCegarLoop]: Abstraction has 43131 states and 69542 transitions. [2021-12-17 15:41:02,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 5 states have internal predecessors, (156), 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) [2021-12-17 15:41:02,911 INFO L276 IsEmpty]: Start isEmpty. Operand 43131 states and 69542 transitions. [2021-12-17 15:41:02,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-17 15:41:02,935 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:41:02,936 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:41:02,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-17 15:41:02,936 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:41:02,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:41:02,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1028200241, now seen corresponding path program 1 times [2021-12-17 15:41:02,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:41:02,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298207855] [2021-12-17 15:41:02,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:41:02,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:41:02,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:41:02,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:41:02,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:41:02,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 15:41:02,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:41:03,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 15:41:03,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:41:03,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-17 15:41:03,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:41:03,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-12-17 15:41:03,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:41:03,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:41:03,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:41:03,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298207855] [2021-12-17 15:41:03,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298207855] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:41:03,062 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:41:03,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 15:41:03,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799461785] [2021-12-17 15:41:03,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:41:03,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 15:41:03,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:41:03,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 15:41:03,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 15:41:03,064 INFO L87 Difference]: Start difference. First operand 43131 states and 69542 transitions. Second operand has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 5 states have internal predecessors, (156), 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) [2021-12-17 15:41:10,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:41:10,486 INFO L93 Difference]: Finished difference Result 156646 states and 255704 transitions. [2021-12-17 15:41:10,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 15:41:10,487 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 5 states have internal predecessors, (156), 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 167 [2021-12-17 15:41:10,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:41:10,951 INFO L225 Difference]: With dead ends: 156646 [2021-12-17 15:41:10,951 INFO L226 Difference]: Without dead ends: 113534 [2021-12-17 15:41:11,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 15:41:11,091 INFO L933 BasicCegarLoop]: 920 mSDtfsCounter, 1457 mSDsluCounter, 1884 mSDsCounter, 0 mSdLazyCounter, 2805 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1475 SdHoareTripleChecker+Valid, 2804 SdHoareTripleChecker+Invalid, 2889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 2805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-17 15:41:11,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1475 Valid, 2804 Invalid, 2889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 2805 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-17 15:41:11,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113534 states. [2021-12-17 15:41:15,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113534 to 86148. [2021-12-17 15:41:15,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86148 states, 79202 states have (on average 1.5651246180652003) internal successors, (123961), 79460 states have internal predecessors, (123961), 5147 states have call successors, (5147), 1543 states have call predecessors, (5147), 1798 states have return successors, (11962), 5400 states have call predecessors, (11962), 5145 states have call successors, (11962) [2021-12-17 15:41:16,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86148 states to 86148 states and 141070 transitions. [2021-12-17 15:41:16,327 INFO L78 Accepts]: Start accepts. Automaton has 86148 states and 141070 transitions. Word has length 167 [2021-12-17 15:41:16,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:41:16,328 INFO L470 AbstractCegarLoop]: Abstraction has 86148 states and 141070 transitions. [2021-12-17 15:41:16,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 5 states have internal predecessors, (156), 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) [2021-12-17 15:41:16,328 INFO L276 IsEmpty]: Start isEmpty. Operand 86148 states and 141070 transitions. [2021-12-17 15:41:16,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-17 15:41:16,385 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:41:16,385 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:41:16,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-17 15:41:16,386 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:41:16,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:41:16,387 INFO L85 PathProgramCache]: Analyzing trace with hash -958552367, now seen corresponding path program 1 times [2021-12-17 15:41:16,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:41:16,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335401487] [2021-12-17 15:41:16,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:41:16,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:41:16,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:41:16,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:41:16,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:41:16,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 15:41:16,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:41:16,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 15:41:16,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:41:16,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-17 15:41:16,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:41:16,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-12-17 15:41:16,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:41:16,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:41:16,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:41:16,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335401487] [2021-12-17 15:41:16,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335401487] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:41:16,509 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:41:16,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 15:41:16,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514289820] [2021-12-17 15:41:16,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:41:16,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 15:41:16,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:41:16,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 15:41:16,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 15:41:16,511 INFO L87 Difference]: Start difference. First operand 86148 states and 141070 transitions. Second operand has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 5 states have internal predecessors, (156), 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) [2021-12-17 15:41:29,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:41:29,615 INFO L93 Difference]: Finished difference Result 312317 states and 518174 transitions. [2021-12-17 15:41:29,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 15:41:29,616 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 5 states have internal predecessors, (156), 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 167 [2021-12-17 15:41:29,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted.