./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/systemc/token_ring.04.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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.04.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 d4710f8f3a918a0191222414f5c33a367ff98c09c2e8598fa3213223c4c35dba --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 17:38:12,146 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 17:38:12,149 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 17:38:12,191 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 17:38:12,191 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 17:38:12,193 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 17:38:12,195 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 17:38:12,197 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 17:38:12,198 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 17:38:12,202 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 17:38:12,203 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 17:38:12,205 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 17:38:12,205 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 17:38:12,207 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 17:38:12,208 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 17:38:12,211 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 17:38:12,212 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 17:38:12,213 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 17:38:12,215 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 17:38:12,220 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 17:38:12,222 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 17:38:12,223 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 17:38:12,224 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 17:38:12,225 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 17:38:12,226 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 17:38:12,232 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 17:38:12,232 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 17:38:12,233 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 17:38:12,234 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 17:38:12,235 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 17:38:12,236 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 17:38:12,236 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 17:38:12,238 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 17:38:12,238 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 17:38:12,239 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 17:38:12,240 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 17:38:12,240 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 17:38:12,241 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 17:38:12,241 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 17:38:12,241 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 17:38:12,242 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 17:38:12,243 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 17:38:12,245 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 17:38:12,273 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 17:38:12,273 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 17:38:12,274 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 17:38:12,274 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 17:38:12,275 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 17:38:12,275 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 17:38:12,275 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 17:38:12,276 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 17:38:12,276 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 17:38:12,277 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 17:38:12,277 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 17:38:12,277 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 17:38:12,277 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 17:38:12,278 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 17:38:12,278 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 17:38:12,278 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 17:38:12,278 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 17:38:12,278 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 17:38:12,279 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 17:38:12,280 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 17:38:12,280 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 17:38:12,280 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 17:38:12,280 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 17:38:12,280 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 17:38:12,281 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 17:38:12,281 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 17:38:12,281 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 17:38:12,281 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 17:38:12,282 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 17:38:12,282 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 17:38:12,282 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 17:38:12,282 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 17:38:12,282 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 17:38:12,283 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d4710f8f3a918a0191222414f5c33a367ff98c09c2e8598fa3213223c4c35dba [2022-07-19 17:38:12,542 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 17:38:12,567 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 17:38:12,570 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 17:38:12,571 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 17:38:12,571 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 17:38:12,573 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/systemc/token_ring.04.cil-1.c [2022-07-19 17:38:12,632 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/062ff8d22/6cb67d51cde34c77b7492b9a499aa279/FLAGb1448e20e [2022-07-19 17:38:13,063 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 17:38:13,064 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/token_ring.04.cil-1.c [2022-07-19 17:38:13,078 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/062ff8d22/6cb67d51cde34c77b7492b9a499aa279/FLAGb1448e20e [2022-07-19 17:38:13,454 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/062ff8d22/6cb67d51cde34c77b7492b9a499aa279 [2022-07-19 17:38:13,456 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 17:38:13,457 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 17:38:13,463 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 17:38:13,463 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 17:38:13,466 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 17:38:13,467 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 05:38:13" (1/1) ... [2022-07-19 17:38:13,468 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@370025ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:38:13, skipping insertion in model container [2022-07-19 17:38:13,468 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 05:38:13" (1/1) ... [2022-07-19 17:38:13,473 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 17:38:13,510 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 17:38:13,633 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.04.cil-1.c[671,684] [2022-07-19 17:38:13,707 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 17:38:13,716 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 17:38:13,731 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.04.cil-1.c[671,684] [2022-07-19 17:38:13,772 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 17:38:13,787 INFO L208 MainTranslator]: Completed translation [2022-07-19 17:38:13,787 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:38:13 WrapperNode [2022-07-19 17:38:13,787 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 17:38:13,788 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 17:38:13,788 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 17:38:13,788 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 17:38:13,797 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:38:13" (1/1) ... [2022-07-19 17:38:13,805 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:38:13" (1/1) ... [2022-07-19 17:38:13,847 INFO L137 Inliner]: procedures = 36, calls = 43, calls flagged for inlining = 20, calls inlined = 20, statements flattened = 389 [2022-07-19 17:38:13,848 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 17:38:13,850 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 17:38:13,850 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 17:38:13,850 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 17:38:13,857 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:38:13" (1/1) ... [2022-07-19 17:38:13,857 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:38:13" (1/1) ... [2022-07-19 17:38:13,870 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:38:13" (1/1) ... [2022-07-19 17:38:13,880 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:38:13" (1/1) ... [2022-07-19 17:38:13,886 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:38:13" (1/1) ... [2022-07-19 17:38:13,893 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:38:13" (1/1) ... [2022-07-19 17:38:13,894 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:38:13" (1/1) ... [2022-07-19 17:38:13,897 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 17:38:13,898 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 17:38:13,898 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 17:38:13,898 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 17:38:13,899 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:38:13" (1/1) ... [2022-07-19 17:38:13,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 17:38:13,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:38:13,930 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) [2022-07-19 17:38:13,932 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 [2022-07-19 17:38:13,958 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 17:38:13,959 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-07-19 17:38:13,959 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-07-19 17:38:13,960 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-07-19 17:38:13,960 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-07-19 17:38:13,960 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-07-19 17:38:13,960 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-07-19 17:38:13,963 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-07-19 17:38:13,963 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-07-19 17:38:13,964 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-07-19 17:38:13,964 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-07-19 17:38:13,964 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 17:38:13,964 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-07-19 17:38:13,964 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-07-19 17:38:13,965 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 17:38:13,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 17:38:14,032 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 17:38:14,034 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 17:38:14,510 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 17:38:14,518 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 17:38:14,518 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2022-07-19 17:38:14,520 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 05:38:14 BoogieIcfgContainer [2022-07-19 17:38:14,520 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 17:38:14,521 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 17:38:14,522 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 17:38:14,524 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 17:38:14,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 05:38:13" (1/3) ... [2022-07-19 17:38:14,525 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ec5d36a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 05:38:14, skipping insertion in model container [2022-07-19 17:38:14,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:38:13" (2/3) ... [2022-07-19 17:38:14,526 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ec5d36a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 05:38:14, skipping insertion in model container [2022-07-19 17:38:14,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 05:38:14" (3/3) ... [2022-07-19 17:38:14,527 INFO L111 eAbstractionObserver]: Analyzing ICFG token_ring.04.cil-1.c [2022-07-19 17:38:14,539 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 17:38:14,539 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 17:38:14,590 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 17:38:14,596 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@121f794f, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6c660d3b [2022-07-19 17:38:14,596 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 17:38:14,600 INFO L276 IsEmpty]: Start isEmpty. Operand has 182 states, 156 states have (on average 1.608974358974359) internal successors, (251), 158 states have internal predecessors, (251), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-19 17:38:14,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-19 17:38:14,610 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:38:14,611 INFO L195 NwaCegarLoop]: 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] [2022-07-19 17:38:14,612 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:38:14,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:38:14,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1049812288, now seen corresponding path program 1 times [2022-07-19 17:38:14,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:38:14,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019785840] [2022-07-19 17:38:14,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:38:14,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:38:14,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:14,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:38:14,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:14,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 17:38:14,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:14,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-19 17:38:14,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:14,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-19 17:38:14,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:14,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-07-19 17:38:14,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:14,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 17:38:14,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:38:14,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019785840] [2022-07-19 17:38:14,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019785840] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:38:14,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 17:38:14,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 17:38:14,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398341163] [2022-07-19 17:38:14,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:38:14,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 17:38:14,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:38:14,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 17:38:14,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 17:38:14,996 INFO L87 Difference]: Start difference. First operand has 182 states, 156 states have (on average 1.608974358974359) internal successors, (251), 158 states have internal predecessors, (251), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 17:38:15,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:38:15,621 INFO L93 Difference]: Finished difference Result 407 states and 650 transitions. [2022-07-19 17:38:15,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 17:38:15,623 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 89 [2022-07-19 17:38:15,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:38:15,640 INFO L225 Difference]: With dead ends: 407 [2022-07-19 17:38:15,640 INFO L226 Difference]: Without dead ends: 231 [2022-07-19 17:38:15,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-19 17:38:15,650 INFO L413 NwaCegarLoop]: 292 mSDtfsCounter, 430 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 17:38:15,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [446 Valid, 481 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 17:38:15,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-07-19 17:38:15,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 177. [2022-07-19 17:38:15,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 152 states have (on average 1.513157894736842) internal successors, (230), 153 states have internal predecessors, (230), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-19 17:38:15,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 266 transitions. [2022-07-19 17:38:15,701 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 266 transitions. Word has length 89 [2022-07-19 17:38:15,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:38:15,701 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 266 transitions. [2022-07-19 17:38:15,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 17:38:15,702 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 266 transitions. [2022-07-19 17:38:15,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-19 17:38:15,705 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:38:15,705 INFO L195 NwaCegarLoop]: 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] [2022-07-19 17:38:15,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 17:38:15,706 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:38:15,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:38:15,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1888845950, now seen corresponding path program 1 times [2022-07-19 17:38:15,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:38:15,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646332645] [2022-07-19 17:38:15,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:38:15,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:38:15,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:15,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:38:15,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:15,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 17:38:15,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:15,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-19 17:38:15,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:15,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-19 17:38:15,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:15,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-07-19 17:38:15,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:15,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 17:38:15,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:38:15,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646332645] [2022-07-19 17:38:15,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646332645] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:38:15,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 17:38:15,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 17:38:15,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894522675] [2022-07-19 17:38:15,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:38:15,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 17:38:15,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:38:15,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 17:38:15,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-19 17:38:15,833 INFO L87 Difference]: Start difference. First operand 177 states and 266 transitions. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 17:38:16,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:38:16,878 INFO L93 Difference]: Finished difference Result 617 states and 953 transitions. [2022-07-19 17:38:16,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 17:38:16,878 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 89 [2022-07-19 17:38:16,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:38:16,882 INFO L225 Difference]: With dead ends: 617 [2022-07-19 17:38:16,882 INFO L226 Difference]: Without dead ends: 452 [2022-07-19 17:38:16,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-07-19 17:38:16,885 INFO L413 NwaCegarLoop]: 308 mSDtfsCounter, 633 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 847 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 644 SdHoareTripleChecker+Valid, 748 SdHoareTripleChecker+Invalid, 931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-19 17:38:16,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [644 Valid, 748 Invalid, 931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 847 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-19 17:38:16,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2022-07-19 17:38:16,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 345. [2022-07-19 17:38:16,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 300 states have (on average 1.5266666666666666) internal successors, (458), 302 states have internal predecessors, (458), 31 states have call successors, (31), 12 states have call predecessors, (31), 13 states have return successors, (34), 31 states have call predecessors, (34), 31 states have call successors, (34) [2022-07-19 17:38:16,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 523 transitions. [2022-07-19 17:38:16,927 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 523 transitions. Word has length 89 [2022-07-19 17:38:16,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:38:16,927 INFO L495 AbstractCegarLoop]: Abstraction has 345 states and 523 transitions. [2022-07-19 17:38:16,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 17:38:16,928 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 523 transitions. [2022-07-19 17:38:16,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-19 17:38:16,933 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:38:16,933 INFO L195 NwaCegarLoop]: 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] [2022-07-19 17:38:16,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 17:38:16,934 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:38:16,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:38:16,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1231461894, now seen corresponding path program 1 times [2022-07-19 17:38:16,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:38:16,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765747043] [2022-07-19 17:38:16,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:38:16,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:38:16,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:16,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:38:16,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:16,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 17:38:16,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:17,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-19 17:38:17,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:17,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-19 17:38:17,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:17,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-07-19 17:38:17,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:17,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 17:38:17,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:38:17,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765747043] [2022-07-19 17:38:17,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765747043] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:38:17,049 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 17:38:17,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 17:38:17,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604642056] [2022-07-19 17:38:17,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:38:17,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 17:38:17,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:38:17,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 17:38:17,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 17:38:17,051 INFO L87 Difference]: Start difference. First operand 345 states and 523 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 17:38:18,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:38:18,289 INFO L93 Difference]: Finished difference Result 1010 states and 1555 transitions. [2022-07-19 17:38:18,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 17:38:18,289 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 89 [2022-07-19 17:38:18,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:38:18,296 INFO L225 Difference]: With dead ends: 1010 [2022-07-19 17:38:18,296 INFO L226 Difference]: Without dead ends: 677 [2022-07-19 17:38:18,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-19 17:38:18,315 INFO L413 NwaCegarLoop]: 431 mSDtfsCounter, 631 mSDsluCounter, 848 mSDsCounter, 0 mSdLazyCounter, 1311 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 642 SdHoareTripleChecker+Valid, 1279 SdHoareTripleChecker+Invalid, 1371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-19 17:38:18,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [642 Valid, 1279 Invalid, 1371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1311 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-19 17:38:18,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2022-07-19 17:38:18,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 502. [2022-07-19 17:38:18,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 437 states have (on average 1.5194508009153318) internal successors, (664), 440 states have internal predecessors, (664), 44 states have call successors, (44), 18 states have call predecessors, (44), 20 states have return successors, (49), 45 states have call predecessors, (49), 44 states have call successors, (49) [2022-07-19 17:38:18,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 757 transitions. [2022-07-19 17:38:18,353 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 757 transitions. Word has length 89 [2022-07-19 17:38:18,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:38:18,354 INFO L495 AbstractCegarLoop]: Abstraction has 502 states and 757 transitions. [2022-07-19 17:38:18,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 17:38:18,354 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 757 transitions. [2022-07-19 17:38:18,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-19 17:38:18,356 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:38:18,356 INFO L195 NwaCegarLoop]: 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] [2022-07-19 17:38:18,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 17:38:18,357 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:38:18,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:38:18,357 INFO L85 PathProgramCache]: Analyzing trace with hash 2118684740, now seen corresponding path program 1 times [2022-07-19 17:38:18,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:38:18,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431049569] [2022-07-19 17:38:18,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:38:18,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:38:18,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:18,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:38:18,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:18,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 17:38:18,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:18,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-19 17:38:18,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:18,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-19 17:38:18,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:18,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-07-19 17:38:18,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:18,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 17:38:18,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:38:18,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431049569] [2022-07-19 17:38:18,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431049569] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:38:18,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 17:38:18,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 17:38:18,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105684092] [2022-07-19 17:38:18,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:38:18,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 17:38:18,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:38:18,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 17:38:18,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 17:38:18,451 INFO L87 Difference]: Start difference. First operand 502 states and 757 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 17:38:19,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:38:19,578 INFO L93 Difference]: Finished difference Result 1588 states and 2437 transitions. [2022-07-19 17:38:19,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 17:38:19,579 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 89 [2022-07-19 17:38:19,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:38:19,585 INFO L225 Difference]: With dead ends: 1588 [2022-07-19 17:38:19,585 INFO L226 Difference]: Without dead ends: 1098 [2022-07-19 17:38:19,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-19 17:38:19,588 INFO L413 NwaCegarLoop]: 320 mSDtfsCounter, 676 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 1171 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 687 SdHoareTripleChecker+Valid, 898 SdHoareTripleChecker+Invalid, 1254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-19 17:38:19,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [687 Valid, 898 Invalid, 1254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1171 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-19 17:38:19,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1098 states. [2022-07-19 17:38:19,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1098 to 817. [2022-07-19 17:38:19,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 712 states have (on average 1.5126404494382022) internal successors, (1077), 717 states have internal predecessors, (1077), 70 states have call successors, (70), 30 states have call predecessors, (70), 34 states have return successors, (83), 73 states have call predecessors, (83), 70 states have call successors, (83) [2022-07-19 17:38:19,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 1230 transitions. [2022-07-19 17:38:19,638 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 1230 transitions. Word has length 89 [2022-07-19 17:38:19,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:38:19,639 INFO L495 AbstractCegarLoop]: Abstraction has 817 states and 1230 transitions. [2022-07-19 17:38:19,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 17:38:19,639 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 1230 transitions. [2022-07-19 17:38:19,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-19 17:38:19,641 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:38:19,642 INFO L195 NwaCegarLoop]: 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] [2022-07-19 17:38:19,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 17:38:19,642 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:38:19,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:38:19,643 INFO L85 PathProgramCache]: Analyzing trace with hash 207642182, now seen corresponding path program 1 times [2022-07-19 17:38:19,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:38:19,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187240350] [2022-07-19 17:38:19,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:38:19,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:38:19,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:19,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:38:19,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:19,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 17:38:19,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:19,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-19 17:38:19,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:19,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-19 17:38:19,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:19,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-07-19 17:38:19,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:19,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 17:38:19,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:38:19,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187240350] [2022-07-19 17:38:19,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187240350] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:38:19,753 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 17:38:19,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 17:38:19,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147459983] [2022-07-19 17:38:19,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:38:19,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 17:38:19,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:38:19,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 17:38:19,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 17:38:19,755 INFO L87 Difference]: Start difference. First operand 817 states and 1230 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 17:38:20,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:38:20,903 INFO L93 Difference]: Finished difference Result 2703 states and 4134 transitions. [2022-07-19 17:38:20,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 17:38:20,904 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 89 [2022-07-19 17:38:20,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:38:20,913 INFO L225 Difference]: With dead ends: 2703 [2022-07-19 17:38:20,913 INFO L226 Difference]: Without dead ends: 1898 [2022-07-19 17:38:20,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-19 17:38:20,916 INFO L413 NwaCegarLoop]: 421 mSDtfsCounter, 623 mSDsluCounter, 848 mSDsCounter, 0 mSdLazyCounter, 1313 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 634 SdHoareTripleChecker+Valid, 1269 SdHoareTripleChecker+Invalid, 1375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-19 17:38:20,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [634 Valid, 1269 Invalid, 1375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1313 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-19 17:38:20,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1898 states. [2022-07-19 17:38:20,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1898 to 1448. [2022-07-19 17:38:20,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1448 states, 1263 states have (on average 1.5067300079176564) internal successors, (1903), 1272 states have internal predecessors, (1903), 122 states have call successors, (122), 54 states have call predecessors, (122), 62 states have return successors, (157), 129 states have call predecessors, (157), 122 states have call successors, (157) [2022-07-19 17:38:20,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1448 states to 1448 states and 2182 transitions. [2022-07-19 17:38:20,991 INFO L78 Accepts]: Start accepts. Automaton has 1448 states and 2182 transitions. Word has length 89 [2022-07-19 17:38:20,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:38:20,992 INFO L495 AbstractCegarLoop]: Abstraction has 1448 states and 2182 transitions. [2022-07-19 17:38:20,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 17:38:20,992 INFO L276 IsEmpty]: Start isEmpty. Operand 1448 states and 2182 transitions. [2022-07-19 17:38:20,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-19 17:38:20,994 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:38:20,994 INFO L195 NwaCegarLoop]: 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] [2022-07-19 17:38:20,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 17:38:20,995 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:38:20,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:38:20,996 INFO L85 PathProgramCache]: Analyzing trace with hash 284542980, now seen corresponding path program 1 times [2022-07-19 17:38:20,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:38:20,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008171783] [2022-07-19 17:38:20,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:38:20,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:38:21,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:21,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:38:21,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:21,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 17:38:21,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:21,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-19 17:38:21,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:21,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-19 17:38:21,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:21,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-07-19 17:38:21,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:21,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 17:38:21,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:38:21,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008171783] [2022-07-19 17:38:21,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008171783] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:38:21,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 17:38:21,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 17:38:21,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644418157] [2022-07-19 17:38:21,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:38:21,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 17:38:21,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:38:21,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 17:38:21,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 17:38:21,087 INFO L87 Difference]: Start difference. First operand 1448 states and 2182 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 17:38:22,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:38:22,286 INFO L93 Difference]: Finished difference Result 4932 states and 7544 transitions. [2022-07-19 17:38:22,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 17:38:22,287 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 89 [2022-07-19 17:38:22,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:38:22,303 INFO L225 Difference]: With dead ends: 4932 [2022-07-19 17:38:22,304 INFO L226 Difference]: Without dead ends: 3496 [2022-07-19 17:38:22,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-19 17:38:22,309 INFO L413 NwaCegarLoop]: 417 mSDtfsCounter, 619 mSDsluCounter, 848 mSDsCounter, 0 mSdLazyCounter, 1308 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 630 SdHoareTripleChecker+Valid, 1265 SdHoareTripleChecker+Invalid, 1370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-19 17:38:22,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [630 Valid, 1265 Invalid, 1370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1308 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-19 17:38:22,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3496 states. [2022-07-19 17:38:22,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3496 to 2715. [2022-07-19 17:38:22,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2715 states, 2370 states have (on average 1.5025316455696203) internal successors, (3561), 2387 states have internal predecessors, (3561), 226 states have call successors, (226), 102 states have call predecessors, (226), 118 states have return successors, (323), 241 states have call predecessors, (323), 226 states have call successors, (323) [2022-07-19 17:38:22,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2715 states to 2715 states and 4110 transitions. [2022-07-19 17:38:22,491 INFO L78 Accepts]: Start accepts. Automaton has 2715 states and 4110 transitions. Word has length 89 [2022-07-19 17:38:22,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:38:22,492 INFO L495 AbstractCegarLoop]: Abstraction has 2715 states and 4110 transitions. [2022-07-19 17:38:22,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 17:38:22,492 INFO L276 IsEmpty]: Start isEmpty. Operand 2715 states and 4110 transitions. [2022-07-19 17:38:22,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-19 17:38:22,495 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:38:22,495 INFO L195 NwaCegarLoop]: 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] [2022-07-19 17:38:22,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 17:38:22,495 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:38:22,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:38:22,496 INFO L85 PathProgramCache]: Analyzing trace with hash -682807674, now seen corresponding path program 1 times [2022-07-19 17:38:22,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:38:22,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591676351] [2022-07-19 17:38:22,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:38:22,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:38:22,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:22,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:38:22,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:22,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 17:38:22,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:22,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-19 17:38:22,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:22,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-19 17:38:22,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:22,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-07-19 17:38:22,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:22,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 17:38:22,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:38:22,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591676351] [2022-07-19 17:38:22,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591676351] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:38:22,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 17:38:22,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 17:38:22,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482991674] [2022-07-19 17:38:22,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:38:22,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 17:38:22,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:38:22,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 17:38:22,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 17:38:22,598 INFO L87 Difference]: Start difference. First operand 2715 states and 4110 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 17:38:24,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:38:24,087 INFO L93 Difference]: Finished difference Result 10429 states and 15960 transitions. [2022-07-19 17:38:24,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-19 17:38:24,088 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 89 [2022-07-19 17:38:24,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:38:24,129 INFO L225 Difference]: With dead ends: 10429 [2022-07-19 17:38:24,129 INFO L226 Difference]: Without dead ends: 7726 [2022-07-19 17:38:24,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-07-19 17:38:24,142 INFO L413 NwaCegarLoop]: 411 mSDtfsCounter, 789 mSDsluCounter, 840 mSDsCounter, 0 mSdLazyCounter, 1296 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 805 SdHoareTripleChecker+Valid, 1251 SdHoareTripleChecker+Invalid, 1363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-19 17:38:24,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [805 Valid, 1251 Invalid, 1363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1296 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-19 17:38:24,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7726 states. [2022-07-19 17:38:24,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7726 to 5214. [2022-07-19 17:38:24,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5214 states, 4565 states have (on average 1.503395399780942) internal successors, (6863), 4598 states have internal predecessors, (6863), 418 states have call successors, (418), 198 states have call predecessors, (418), 230 states have return successors, (693), 449 states have call predecessors, (693), 418 states have call successors, (693) [2022-07-19 17:38:24,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5214 states to 5214 states and 7974 transitions. [2022-07-19 17:38:24,476 INFO L78 Accepts]: Start accepts. Automaton has 5214 states and 7974 transitions. Word has length 89 [2022-07-19 17:38:24,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:38:24,476 INFO L495 AbstractCegarLoop]: Abstraction has 5214 states and 7974 transitions. [2022-07-19 17:38:24,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 17:38:24,477 INFO L276 IsEmpty]: Start isEmpty. Operand 5214 states and 7974 transitions. [2022-07-19 17:38:24,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-19 17:38:24,483 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:38:24,483 INFO L195 NwaCegarLoop]: 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] [2022-07-19 17:38:24,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 17:38:24,484 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:38:24,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:38:24,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1225650116, now seen corresponding path program 1 times [2022-07-19 17:38:24,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:38:24,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885320666] [2022-07-19 17:38:24,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:38:24,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:38:24,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:24,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:38:24,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:24,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 17:38:24,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:24,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-19 17:38:24,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:24,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-19 17:38:24,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:24,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-07-19 17:38:24,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:24,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 17:38:24,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:38:24,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885320666] [2022-07-19 17:38:24,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885320666] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:38:24,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 17:38:24,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 17:38:24,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314448892] [2022-07-19 17:38:24,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:38:24,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 17:38:24,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:38:24,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 17:38:24,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 17:38:24,582 INFO L87 Difference]: Start difference. First operand 5214 states and 7974 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 17:38:26,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:38:26,344 INFO L93 Difference]: Finished difference Result 19854 states and 30642 transitions. [2022-07-19 17:38:26,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-19 17:38:26,345 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 89 [2022-07-19 17:38:26,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:38:26,436 INFO L225 Difference]: With dead ends: 19854 [2022-07-19 17:38:26,436 INFO L226 Difference]: Without dead ends: 14652 [2022-07-19 17:38:26,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-07-19 17:38:26,459 INFO L413 NwaCegarLoop]: 464 mSDtfsCounter, 646 mSDsluCounter, 837 mSDsCounter, 0 mSdLazyCounter, 1476 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 656 SdHoareTripleChecker+Valid, 1301 SdHoareTripleChecker+Invalid, 1543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-19 17:38:26,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [656 Valid, 1301 Invalid, 1543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1476 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-19 17:38:26,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14652 states. [2022-07-19 17:38:27,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14652 to 10033. [2022-07-19 17:38:27,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10033 states, 8792 states have (on average 1.5037534121929026) internal successors, (13221), 8857 states have internal predecessors, (13221), 786 states have call successors, (786), 390 states have call predecessors, (786), 454 states have return successors, (1579), 849 states have call predecessors, (1579), 786 states have call successors, (1579) [2022-07-19 17:38:27,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10033 states to 10033 states and 15586 transitions. [2022-07-19 17:38:27,124 INFO L78 Accepts]: Start accepts. Automaton has 10033 states and 15586 transitions. Word has length 89 [2022-07-19 17:38:27,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:38:27,126 INFO L495 AbstractCegarLoop]: Abstraction has 10033 states and 15586 transitions. [2022-07-19 17:38:27,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 17:38:27,127 INFO L276 IsEmpty]: Start isEmpty. Operand 10033 states and 15586 transitions. [2022-07-19 17:38:27,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-19 17:38:27,137 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:38:27,137 INFO L195 NwaCegarLoop]: 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] [2022-07-19 17:38:27,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-19 17:38:27,138 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:38:27,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:38:27,139 INFO L85 PathProgramCache]: Analyzing trace with hash 733023942, now seen corresponding path program 1 times [2022-07-19 17:38:27,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:38:27,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261745116] [2022-07-19 17:38:27,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:38:27,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:38:27,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:27,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:38:27,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:27,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 17:38:27,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:27,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-19 17:38:27,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:27,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-19 17:38:27,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:27,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-07-19 17:38:27,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:27,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 17:38:27,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:38:27,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261745116] [2022-07-19 17:38:27,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261745116] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:38:27,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 17:38:27,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 17:38:27,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406888647] [2022-07-19 17:38:27,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:38:27,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 17:38:27,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:38:27,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 17:38:27,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 17:38:27,236 INFO L87 Difference]: Start difference. First operand 10033 states and 15586 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 17:38:29,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:38:29,283 INFO L93 Difference]: Finished difference Result 36672 states and 57504 transitions. [2022-07-19 17:38:29,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-19 17:38:29,291 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 89 [2022-07-19 17:38:29,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:38:29,400 INFO L225 Difference]: With dead ends: 36672 [2022-07-19 17:38:29,401 INFO L226 Difference]: Without dead ends: 26651 [2022-07-19 17:38:29,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-07-19 17:38:29,444 INFO L413 NwaCegarLoop]: 397 mSDtfsCounter, 666 mSDsluCounter, 840 mSDsCounter, 0 mSdLazyCounter, 1268 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 682 SdHoareTripleChecker+Valid, 1237 SdHoareTripleChecker+Invalid, 1339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-19 17:38:29,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [682 Valid, 1237 Invalid, 1339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1268 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-19 17:38:29,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26651 states. [2022-07-19 17:38:30,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26651 to 19861. [2022-07-19 17:38:30,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19861 states, 17468 states have (on average 1.50841538813831) internal successors, (26349), 17597 states have internal predecessors, (26349), 1490 states have call successors, (1490), 774 states have call predecessors, (1490), 902 states have return successors, (3805), 1617 states have call predecessors, (3805), 1490 states have call successors, (3805) [2022-07-19 17:38:30,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19861 states to 19861 states and 31644 transitions. [2022-07-19 17:38:30,831 INFO L78 Accepts]: Start accepts. Automaton has 19861 states and 31644 transitions. Word has length 89 [2022-07-19 17:38:30,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:38:30,832 INFO L495 AbstractCegarLoop]: Abstraction has 19861 states and 31644 transitions. [2022-07-19 17:38:30,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 17:38:30,832 INFO L276 IsEmpty]: Start isEmpty. Operand 19861 states and 31644 transitions. [2022-07-19 17:38:30,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-19 17:38:30,851 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:38:30,852 INFO L195 NwaCegarLoop]: 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] [2022-07-19 17:38:30,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-19 17:38:30,852 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:38:30,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:38:30,853 INFO L85 PathProgramCache]: Analyzing trace with hash -483129784, now seen corresponding path program 1 times [2022-07-19 17:38:30,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:38:30,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053981990] [2022-07-19 17:38:30,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:38:30,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:38:30,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:30,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:38:30,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:30,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 17:38:30,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:30,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-19 17:38:30,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:30,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-19 17:38:30,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:30,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-07-19 17:38:30,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:30,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 17:38:30,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:38:30,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053981990] [2022-07-19 17:38:30,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053981990] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:38:30,937 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 17:38:30,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 17:38:30,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082718928] [2022-07-19 17:38:30,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:38:30,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 17:38:30,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:38:30,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 17:38:30,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 17:38:30,939 INFO L87 Difference]: Start difference. First operand 19861 states and 31644 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 17:38:33,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:38:33,922 INFO L93 Difference]: Finished difference Result 70566 states and 113524 transitions. [2022-07-19 17:38:33,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-19 17:38:33,922 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 89 [2022-07-19 17:38:33,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:38:34,190 INFO L225 Difference]: With dead ends: 70566 [2022-07-19 17:38:34,191 INFO L226 Difference]: Without dead ends: 50717 [2022-07-19 17:38:34,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-07-19 17:38:34,273 INFO L413 NwaCegarLoop]: 405 mSDtfsCounter, 611 mSDsluCounter, 840 mSDsCounter, 0 mSdLazyCounter, 1341 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 621 SdHoareTripleChecker+Valid, 1245 SdHoareTripleChecker+Invalid, 1407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-19 17:38:34,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [621 Valid, 1245 Invalid, 1407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1341 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-19 17:38:34,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50717 states. [2022-07-19 17:38:36,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50717 to 39450. [2022-07-19 17:38:36,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39450 states, 34817 states have (on average 1.512565700663469) internal successors, (52663), 35074 states have internal predecessors, (52663), 2834 states have call successors, (2834), 1542 states have call predecessors, (2834), 1798 states have return successors, (9651), 3089 states have call predecessors, (9651), 2834 states have call successors, (9651) [2022-07-19 17:38:36,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39450 states to 39450 states and 65148 transitions. [2022-07-19 17:38:36,547 INFO L78 Accepts]: Start accepts. Automaton has 39450 states and 65148 transitions. Word has length 89 [2022-07-19 17:38:36,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:38:36,547 INFO L495 AbstractCegarLoop]: Abstraction has 39450 states and 65148 transitions. [2022-07-19 17:38:36,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 17:38:36,547 INFO L276 IsEmpty]: Start isEmpty. Operand 39450 states and 65148 transitions. [2022-07-19 17:38:36,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-19 17:38:36,576 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:38:36,576 INFO L195 NwaCegarLoop]: 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] [2022-07-19 17:38:36,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-19 17:38:36,577 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:38:36,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:38:36,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1215097210, now seen corresponding path program 1 times [2022-07-19 17:38:36,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:38:36,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568116673] [2022-07-19 17:38:36,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:38:36,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:38:36,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:36,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:38:36,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:36,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 17:38:36,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:36,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-19 17:38:36,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:36,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-19 17:38:36,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:36,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-07-19 17:38:36,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:36,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 17:38:36,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:38:36,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568116673] [2022-07-19 17:38:36,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568116673] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:38:36,658 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 17:38:36,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 17:38:36,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71028805] [2022-07-19 17:38:36,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:38:36,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 17:38:36,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:38:36,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 17:38:36,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-19 17:38:36,660 INFO L87 Difference]: Start difference. First operand 39450 states and 65148 transitions. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 17:38:41,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:38:41,115 INFO L93 Difference]: Finished difference Result 112207 states and 182741 transitions. [2022-07-19 17:38:41,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 17:38:41,116 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 89 [2022-07-19 17:38:41,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:38:41,455 INFO L225 Difference]: With dead ends: 112207 [2022-07-19 17:38:41,455 INFO L226 Difference]: Without dead ends: 72770 [2022-07-19 17:38:41,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-07-19 17:38:41,570 INFO L413 NwaCegarLoop]: 517 mSDtfsCounter, 817 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 1018 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 846 SdHoareTripleChecker+Valid, 1055 SdHoareTripleChecker+Invalid, 1111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 17:38:41,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [846 Valid, 1055 Invalid, 1111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1018 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-19 17:38:41,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72770 states. [2022-07-19 17:38:44,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72770 to 58973. [2022-07-19 17:38:44,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58973 states, 51952 states have (on average 1.500769941484447) internal successors, (77968), 52466 states have internal predecessors, (77968), 4320 states have call successors, (4320), 2316 states have call predecessors, (4320), 2700 states have return successors, (13325), 4446 states have call predecessors, (13325), 4320 states have call successors, (13325) [2022-07-19 17:38:44,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58973 states to 58973 states and 95613 transitions. [2022-07-19 17:38:44,878 INFO L78 Accepts]: Start accepts. Automaton has 58973 states and 95613 transitions. Word has length 89 [2022-07-19 17:38:44,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:38:44,879 INFO L495 AbstractCegarLoop]: Abstraction has 58973 states and 95613 transitions. [2022-07-19 17:38:44,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 17:38:44,879 INFO L276 IsEmpty]: Start isEmpty. Operand 58973 states and 95613 transitions. [2022-07-19 17:38:45,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-07-19 17:38:45,023 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:38:45,024 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:38:45,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-19 17:38:45,024 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:38:45,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:38:45,025 INFO L85 PathProgramCache]: Analyzing trace with hash 703245456, now seen corresponding path program 1 times [2022-07-19 17:38:45,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:38:45,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486119862] [2022-07-19 17:38:45,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:38:45,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:38:45,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:45,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:38:45,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:45,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 17:38:45,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:45,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-19 17:38:45,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:45,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-19 17:38:45,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:45,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-07-19 17:38:45,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:45,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-07-19 17:38:45,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:45,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-19 17:38:45,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:45,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-07-19 17:38:45,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:45,141 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-19 17:38:45,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:38:45,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486119862] [2022-07-19 17:38:45,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486119862] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:38:45,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160846480] [2022-07-19 17:38:45,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:38:45,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:38:45,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:38:45,147 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 17:38:45,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 17:38:45,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:45,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 17:38:45,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:38:45,371 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-19 17:38:45,371 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 17:38:45,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160846480] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:38:45,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 17:38:45,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2022-07-19 17:38:45,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601938201] [2022-07-19 17:38:45,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:38:45,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 17:38:45,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:38:45,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 17:38:45,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 17:38:45,374 INFO L87 Difference]: Start difference. First operand 58973 states and 95613 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-19 17:38:50,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:38:50,304 INFO L93 Difference]: Finished difference Result 175538 states and 286415 transitions. [2022-07-19 17:38:50,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 17:38:50,305 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 145 [2022-07-19 17:38:50,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:38:50,851 INFO L225 Difference]: With dead ends: 175538 [2022-07-19 17:38:50,852 INFO L226 Difference]: Without dead ends: 116578 [2022-07-19 17:38:50,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 17:38:50,974 INFO L413 NwaCegarLoop]: 275 mSDtfsCounter, 216 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 17:38:50,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 512 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 17:38:51,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116578 states. [2022-07-19 17:38:56,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116578 to 115804. [2022-07-19 17:38:56,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115804 states, 101961 states have (on average 1.4989162522925432) internal successors, (152831), 102988 states have internal predecessors, (152831), 8442 states have call successors, (8442), 4632 states have call predecessors, (8442), 5400 states have return successors, (26197), 8439 states have call predecessors, (26197), 8442 states have call successors, (26197) [2022-07-19 17:38:57,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115804 states to 115804 states and 187470 transitions. [2022-07-19 17:38:57,196 INFO L78 Accepts]: Start accepts. Automaton has 115804 states and 187470 transitions. Word has length 145 [2022-07-19 17:38:57,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:38:57,197 INFO L495 AbstractCegarLoop]: Abstraction has 115804 states and 187470 transitions. [2022-07-19 17:38:57,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-19 17:38:57,197 INFO L276 IsEmpty]: Start isEmpty. Operand 115804 states and 187470 transitions. [2022-07-19 17:38:57,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-07-19 17:38:57,528 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:38:57,528 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:38:57,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 17:38:57,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-19 17:38:57,752 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:38:57,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:38:57,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1164809040, now seen corresponding path program 1 times [2022-07-19 17:38:57,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:38:57,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529918281] [2022-07-19 17:38:57,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:38:57,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:38:57,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:57,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:38:57,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:57,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 17:38:57,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:57,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-19 17:38:57,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:57,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-19 17:38:57,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:57,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-07-19 17:38:57,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:57,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-07-19 17:38:57,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:57,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-19 17:38:57,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:57,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-07-19 17:38:57,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:57,867 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-19 17:38:57,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:38:57,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529918281] [2022-07-19 17:38:57,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529918281] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:38:57,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153433925] [2022-07-19 17:38:57,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:38:57,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:38:57,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:38:57,869 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 17:38:57,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 17:38:57,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:57,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 17:38:57,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:38:58,064 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-19 17:38:58,065 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 17:38:58,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153433925] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:38:58,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 17:38:58,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2022-07-19 17:38:58,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391240675] [2022-07-19 17:38:58,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:38:58,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 17:38:58,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:38:58,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 17:38:58,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 17:38:58,067 INFO L87 Difference]: Start difference. First operand 115804 states and 187470 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-19 17:39:07,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:39:07,230 INFO L93 Difference]: Finished difference Result 344677 states and 561664 transitions. [2022-07-19 17:39:07,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 17:39:07,231 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 145 [2022-07-19 17:39:07,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:39:08,690 INFO L225 Difference]: With dead ends: 344677 [2022-07-19 17:39:08,690 INFO L226 Difference]: Without dead ends: 228886 [2022-07-19 17:39:08,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 17:39:08,950 INFO L413 NwaCegarLoop]: 275 mSDtfsCounter, 210 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 17:39:08,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 512 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 17:39:09,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228886 states.