./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/systemc/kundu.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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/kundu.cil.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 941010afb19994aa6e2e07f5c4b80f87a4c5e60b4e0ef3217e91339d9dc3aacb --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 05:11:09,576 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 05:11:09,578 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 05:11:09,609 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 05:11:09,610 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 05:11:09,611 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 05:11:09,614 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 05:11:09,616 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 05:11:09,618 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 05:11:09,621 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 05:11:09,622 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 05:11:09,623 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 05:11:09,624 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 05:11:09,625 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 05:11:09,626 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 05:11:09,630 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 05:11:09,631 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 05:11:09,632 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 05:11:09,634 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 05:11:09,638 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 05:11:09,639 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 05:11:09,640 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 05:11:09,641 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 05:11:09,642 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 05:11:09,643 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 05:11:09,648 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 05:11:09,648 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 05:11:09,648 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 05:11:09,649 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 05:11:09,649 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 05:11:09,650 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 05:11:09,650 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 05:11:09,651 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 05:11:09,652 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 05:11:09,653 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 05:11:09,653 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 05:11:09,653 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 05:11:09,654 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 05:11:09,654 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 05:11:09,654 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 05:11:09,655 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 05:11:09,656 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 05:11:09,660 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 05:11:09,685 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 05:11:09,685 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 05:11:09,686 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 05:11:09,686 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 05:11:09,686 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 05:11:09,687 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 05:11:09,687 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 05:11:09,687 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 05:11:09,687 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 05:11:09,688 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 05:11:09,692 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 05:11:09,693 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 05:11:09,693 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 05:11:09,693 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 05:11:09,693 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 05:11:09,693 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 05:11:09,694 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 05:11:09,694 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 05:11:09,694 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 05:11:09,694 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 05:11:09,694 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 05:11:09,695 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 05:11:09,695 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 05:11:09,695 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 05:11:09,695 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 05:11:09,695 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 05:11:09,695 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 05:11:09,696 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 05:11:09,696 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 05:11:09,696 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 05:11:09,696 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 05:11:09,696 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 05:11:09,697 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 05:11:09,697 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 941010afb19994aa6e2e07f5c4b80f87a4c5e60b4e0ef3217e91339d9dc3aacb [2022-07-21 05:11:09,975 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 05:11:09,992 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 05:11:09,994 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 05:11:09,995 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 05:11:09,995 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 05:11:09,996 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/systemc/kundu.cil.c [2022-07-21 05:11:10,065 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32a242d99/43c2b4f83fb941c9bbed6cee810a6dae/FLAG66cc601b2 [2022-07-21 05:11:10,423 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 05:11:10,425 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/kundu.cil.c [2022-07-21 05:11:10,436 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32a242d99/43c2b4f83fb941c9bbed6cee810a6dae/FLAG66cc601b2 [2022-07-21 05:11:10,839 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32a242d99/43c2b4f83fb941c9bbed6cee810a6dae [2022-07-21 05:11:10,841 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 05:11:10,842 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 05:11:10,844 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 05:11:10,844 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 05:11:10,846 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 05:11:10,847 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:11:10" (1/1) ... [2022-07-21 05:11:10,848 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19df06fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:11:10, skipping insertion in model container [2022-07-21 05:11:10,848 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:11:10" (1/1) ... [2022-07-21 05:11:10,852 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 05:11:10,887 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 05:11:10,983 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/kundu.cil.c[635,648] [2022-07-21 05:11:11,064 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 05:11:11,080 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 05:11:11,097 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/kundu.cil.c[635,648] [2022-07-21 05:11:11,136 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 05:11:11,147 INFO L208 MainTranslator]: Completed translation [2022-07-21 05:11:11,152 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:11:11 WrapperNode [2022-07-21 05:11:11,152 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 05:11:11,153 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 05:11:11,153 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 05:11:11,153 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 05:11:11,158 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:11:11" (1/1) ... [2022-07-21 05:11:11,177 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:11:11" (1/1) ... [2022-07-21 05:11:11,211 INFO L137 Inliner]: procedures = 34, calls = 40, calls flagged for inlining = 17, calls inlined = 17, statements flattened = 315 [2022-07-21 05:11:11,212 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 05:11:11,212 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 05:11:11,212 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 05:11:11,213 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 05:11:11,218 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:11:11" (1/1) ... [2022-07-21 05:11:11,219 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:11:11" (1/1) ... [2022-07-21 05:11:11,225 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:11:11" (1/1) ... [2022-07-21 05:11:11,226 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:11:11" (1/1) ... [2022-07-21 05:11:11,237 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:11:11" (1/1) ... [2022-07-21 05:11:11,244 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:11:11" (1/1) ... [2022-07-21 05:11:11,247 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:11:11" (1/1) ... [2022-07-21 05:11:11,248 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 05:11:11,249 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 05:11:11,249 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 05:11:11,249 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 05:11:11,250 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:11:11" (1/1) ... [2022-07-21 05:11:11,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 05:11:11,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:11:11,275 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) [2022-07-21 05:11:11,291 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 [2022-07-21 05:11:11,304 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 05:11:11,305 INFO L130 BoogieDeclarations]: Found specification of procedure write_data [2022-07-21 05:11:11,305 INFO L138 BoogieDeclarations]: Found implementation of procedure write_data [2022-07-21 05:11:11,305 INFO L130 BoogieDeclarations]: Found specification of procedure error [2022-07-21 05:11:11,305 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2022-07-21 05:11:11,305 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-07-21 05:11:11,305 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-07-21 05:11:11,306 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-07-21 05:11:11,307 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-07-21 05:11:11,307 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-07-21 05:11:11,307 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-07-21 05:11:11,307 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-07-21 05:11:11,307 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-07-21 05:11:11,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 05:11:11,307 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-07-21 05:11:11,308 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-07-21 05:11:11,308 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 05:11:11,308 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 05:11:11,394 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 05:11:11,395 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 05:11:11,672 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 05:11:11,680 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 05:11:11,681 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-07-21 05:11:11,683 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:11:11 BoogieIcfgContainer [2022-07-21 05:11:11,684 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 05:11:11,685 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 05:11:11,686 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 05:11:11,688 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 05:11:11,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 05:11:10" (1/3) ... [2022-07-21 05:11:11,688 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@183b0f86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:11:11, skipping insertion in model container [2022-07-21 05:11:11,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:11:11" (2/3) ... [2022-07-21 05:11:11,689 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@183b0f86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:11:11, skipping insertion in model container [2022-07-21 05:11:11,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:11:11" (3/3) ... [2022-07-21 05:11:11,690 INFO L111 eAbstractionObserver]: Analyzing ICFG kundu.cil.c [2022-07-21 05:11:11,699 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 05:11:11,700 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 05:11:11,746 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 05:11:11,751 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@efb796c, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@31aeb87c [2022-07-21 05:11:11,752 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-21 05:11:11,756 INFO L276 IsEmpty]: Start isEmpty. Operand has 135 states, 108 states have (on average 1.5185185185185186) internal successors, (164), 112 states have internal predecessors, (164), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-21 05:11:11,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-21 05:11:11,771 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:11:11,772 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] [2022-07-21 05:11:11,772 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:11:11,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:11:11,777 INFO L85 PathProgramCache]: Analyzing trace with hash -2012698059, now seen corresponding path program 1 times [2022-07-21 05:11:11,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:11:11,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745590134] [2022-07-21 05:11:11,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:11:11,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:11:11,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:11,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:11:11,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:11,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-21 05:11:11,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:11,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-21 05:11:12,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:12,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-21 05:11:12,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:12,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-21 05:11:12,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:12,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:11:12,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:11:12,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745590134] [2022-07-21 05:11:12,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745590134] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:11:12,037 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:11:12,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 05:11:12,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054104483] [2022-07-21 05:11:12,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:11:12,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 05:11:12,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:11:12,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 05:11:12,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 05:11:12,069 INFO L87 Difference]: Start difference. First operand has 135 states, 108 states have (on average 1.5185185185185186) internal successors, (164), 112 states have internal predecessors, (164), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-21 05:11:12,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:11:12,253 INFO L93 Difference]: Finished difference Result 279 states and 421 transitions. [2022-07-21 05:11:12,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 05:11:12,255 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 59 [2022-07-21 05:11:12,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:11:12,274 INFO L225 Difference]: With dead ends: 279 [2022-07-21 05:11:12,274 INFO L226 Difference]: Without dead ends: 146 [2022-07-21 05:11:12,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 05:11:12,280 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 221 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 05:11:12,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 312 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 05:11:12,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-07-21 05:11:12,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 128. [2022-07-21 05:11:12,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 103 states have (on average 1.4466019417475728) internal successors, (149), 106 states have internal predecessors, (149), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-07-21 05:11:12,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 182 transitions. [2022-07-21 05:11:12,321 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 182 transitions. Word has length 59 [2022-07-21 05:11:12,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:11:12,322 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 182 transitions. [2022-07-21 05:11:12,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-21 05:11:12,323 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 182 transitions. [2022-07-21 05:11:12,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-21 05:11:12,325 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:11:12,325 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] [2022-07-21 05:11:12,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 05:11:12,326 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:11:12,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:11:12,327 INFO L85 PathProgramCache]: Analyzing trace with hash 743929207, now seen corresponding path program 1 times [2022-07-21 05:11:12,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:11:12,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809047474] [2022-07-21 05:11:12,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:11:12,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:11:12,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:12,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:11:12,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:12,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-21 05:11:12,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:12,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-21 05:11:12,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:12,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-21 05:11:12,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:12,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-21 05:11:12,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:12,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:11:12,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:11:12,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809047474] [2022-07-21 05:11:12,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809047474] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:11:12,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:11:12,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 05:11:12,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345351695] [2022-07-21 05:11:12,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:11:12,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 05:11:12,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:11:12,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 05:11:12,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 05:11:12,435 INFO L87 Difference]: Start difference. First operand 128 states and 182 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-21 05:11:12,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:11:12,671 INFO L93 Difference]: Finished difference Result 395 states and 569 transitions. [2022-07-21 05:11:12,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 05:11:12,671 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 59 [2022-07-21 05:11:12,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:11:12,674 INFO L225 Difference]: With dead ends: 395 [2022-07-21 05:11:12,674 INFO L226 Difference]: Without dead ends: 278 [2022-07-21 05:11:12,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-21 05:11:12,676 INFO L413 NwaCegarLoop]: 377 mSDtfsCounter, 389 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 846 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 05:11:12,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [406 Valid, 846 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 05:11:12,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-07-21 05:11:12,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 236. [2022-07-21 05:11:12,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 194 states have (on average 1.4381443298969072) internal successors, (279), 198 states have internal predecessors, (279), 29 states have call successors, (29), 13 states have call predecessors, (29), 12 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2022-07-21 05:11:12,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 334 transitions. [2022-07-21 05:11:12,701 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 334 transitions. Word has length 59 [2022-07-21 05:11:12,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:11:12,701 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 334 transitions. [2022-07-21 05:11:12,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-21 05:11:12,702 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 334 transitions. [2022-07-21 05:11:12,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-21 05:11:12,704 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:11:12,704 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] [2022-07-21 05:11:12,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 05:11:12,705 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:11:12,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:11:12,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1652507784, now seen corresponding path program 1 times [2022-07-21 05:11:12,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:11:12,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551504628] [2022-07-21 05:11:12,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:11:12,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:11:12,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:12,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:11:12,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:12,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-21 05:11:12,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:12,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-21 05:11:12,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:12,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-21 05:11:12,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:12,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-21 05:11:12,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:12,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:11:12,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:11:12,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551504628] [2022-07-21 05:11:12,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551504628] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:11:12,808 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:11:12,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 05:11:12,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057636239] [2022-07-21 05:11:12,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:11:12,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 05:11:12,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:11:12,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 05:11:12,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 05:11:12,810 INFO L87 Difference]: Start difference. First operand 236 states and 334 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-21 05:11:12,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:11:12,988 INFO L93 Difference]: Finished difference Result 533 states and 774 transitions. [2022-07-21 05:11:12,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 05:11:12,989 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 59 [2022-07-21 05:11:12,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:11:12,991 INFO L225 Difference]: With dead ends: 533 [2022-07-21 05:11:12,991 INFO L226 Difference]: Without dead ends: 308 [2022-07-21 05:11:12,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-07-21 05:11:12,993 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 183 mSDsluCounter, 666 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 867 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 05:11:12,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 867 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 05:11:12,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-07-21 05:11:13,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 239. [2022-07-21 05:11:13,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 197 states have (on average 1.4263959390862944) internal successors, (281), 201 states have internal predecessors, (281), 29 states have call successors, (29), 13 states have call predecessors, (29), 12 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2022-07-21 05:11:13,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 336 transitions. [2022-07-21 05:11:13,023 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 336 transitions. Word has length 59 [2022-07-21 05:11:13,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:11:13,023 INFO L495 AbstractCegarLoop]: Abstraction has 239 states and 336 transitions. [2022-07-21 05:11:13,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-21 05:11:13,024 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 336 transitions. [2022-07-21 05:11:13,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-21 05:11:13,029 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:11:13,029 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] [2022-07-21 05:11:13,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 05:11:13,029 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:11:13,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:11:13,030 INFO L85 PathProgramCache]: Analyzing trace with hash 797092346, now seen corresponding path program 1 times [2022-07-21 05:11:13,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:11:13,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783368915] [2022-07-21 05:11:13,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:11:13,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:11:13,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:13,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:11:13,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:13,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-21 05:11:13,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:13,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-21 05:11:13,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:13,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-21 05:11:13,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:13,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-21 05:11:13,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:13,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:11:13,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:11:13,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783368915] [2022-07-21 05:11:13,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783368915] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:11:13,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:11:13,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 05:11:13,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092558601] [2022-07-21 05:11:13,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:11:13,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 05:11:13,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:11:13,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 05:11:13,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 05:11:13,090 INFO L87 Difference]: Start difference. First operand 239 states and 336 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-21 05:11:13,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:11:13,300 INFO L93 Difference]: Finished difference Result 553 states and 805 transitions. [2022-07-21 05:11:13,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 05:11:13,301 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 59 [2022-07-21 05:11:13,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:11:13,303 INFO L225 Difference]: With dead ends: 553 [2022-07-21 05:11:13,303 INFO L226 Difference]: Without dead ends: 325 [2022-07-21 05:11:13,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-07-21 05:11:13,305 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 196 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 773 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 05:11:13,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 773 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 05:11:13,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2022-07-21 05:11:13,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 245. [2022-07-21 05:11:13,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 203 states have (on average 1.4137931034482758) internal successors, (287), 207 states have internal predecessors, (287), 29 states have call successors, (29), 13 states have call predecessors, (29), 12 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2022-07-21 05:11:13,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 342 transitions. [2022-07-21 05:11:13,319 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 342 transitions. Word has length 59 [2022-07-21 05:11:13,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:11:13,321 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 342 transitions. [2022-07-21 05:11:13,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-21 05:11:13,321 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 342 transitions. [2022-07-21 05:11:13,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-21 05:11:13,322 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:11:13,328 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] [2022-07-21 05:11:13,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 05:11:13,328 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:11:13,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:11:13,329 INFO L85 PathProgramCache]: Analyzing trace with hash 724705788, now seen corresponding path program 1 times [2022-07-21 05:11:13,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:11:13,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546273819] [2022-07-21 05:11:13,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:11:13,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:11:13,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:13,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:11:13,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:13,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-21 05:11:13,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:13,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-21 05:11:13,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:13,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-21 05:11:13,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:13,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-21 05:11:13,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:13,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:11:13,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:11:13,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546273819] [2022-07-21 05:11:13,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546273819] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:11:13,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:11:13,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 05:11:13,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364408161] [2022-07-21 05:11:13,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:11:13,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 05:11:13,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:11:13,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 05:11:13,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 05:11:13,429 INFO L87 Difference]: Start difference. First operand 245 states and 342 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-21 05:11:13,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:11:13,859 INFO L93 Difference]: Finished difference Result 1013 states and 1453 transitions. [2022-07-21 05:11:13,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 05:11:13,859 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 59 [2022-07-21 05:11:13,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:11:13,864 INFO L225 Difference]: With dead ends: 1013 [2022-07-21 05:11:13,865 INFO L226 Difference]: Without dead ends: 779 [2022-07-21 05:11:13,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-07-21 05:11:13,869 INFO L413 NwaCegarLoop]: 358 mSDtfsCounter, 775 mSDsluCounter, 672 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 793 SdHoareTripleChecker+Valid, 1030 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 05:11:13,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [793 Valid, 1030 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 05:11:13,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2022-07-21 05:11:13,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 459. [2022-07-21 05:11:13,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 383 states have (on average 1.4046997389033942) internal successors, (538), 389 states have internal predecessors, (538), 51 states have call successors, (51), 25 states have call predecessors, (51), 24 states have return successors, (51), 45 states have call predecessors, (51), 48 states have call successors, (51) [2022-07-21 05:11:13,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 640 transitions. [2022-07-21 05:11:13,910 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 640 transitions. Word has length 59 [2022-07-21 05:11:13,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:11:13,911 INFO L495 AbstractCegarLoop]: Abstraction has 459 states and 640 transitions. [2022-07-21 05:11:13,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-21 05:11:13,911 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 640 transitions. [2022-07-21 05:11:13,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-21 05:11:13,912 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:11:13,912 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] [2022-07-21 05:11:13,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 05:11:13,912 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:11:13,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:11:13,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1658073077, now seen corresponding path program 1 times [2022-07-21 05:11:13,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:11:13,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319555160] [2022-07-21 05:11:13,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:11:13,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:11:13,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:13,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:11:13,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:13,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-21 05:11:13,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:13,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-21 05:11:13,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:13,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-21 05:11:13,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:13,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-21 05:11:13,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:13,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:11:13,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:11:13,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319555160] [2022-07-21 05:11:13,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319555160] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:11:13,996 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:11:13,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 05:11:13,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315263136] [2022-07-21 05:11:13,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:11:13,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 05:11:13,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:11:13,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 05:11:13,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 05:11:13,997 INFO L87 Difference]: Start difference. First operand 459 states and 640 transitions. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-21 05:11:14,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:11:14,174 INFO L93 Difference]: Finished difference Result 1008 states and 1458 transitions. [2022-07-21 05:11:14,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 05:11:14,175 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 60 [2022-07-21 05:11:14,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:11:14,178 INFO L225 Difference]: With dead ends: 1008 [2022-07-21 05:11:14,178 INFO L226 Difference]: Without dead ends: 560 [2022-07-21 05:11:14,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-07-21 05:11:14,181 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 75 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 757 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 05:11:14,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 757 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 05:11:14,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2022-07-21 05:11:14,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 471. [2022-07-21 05:11:14,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 395 states have (on average 1.3924050632911393) internal successors, (550), 401 states have internal predecessors, (550), 51 states have call successors, (51), 25 states have call predecessors, (51), 24 states have return successors, (51), 45 states have call predecessors, (51), 48 states have call successors, (51) [2022-07-21 05:11:14,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 652 transitions. [2022-07-21 05:11:14,222 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 652 transitions. Word has length 60 [2022-07-21 05:11:14,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:11:14,223 INFO L495 AbstractCegarLoop]: Abstraction has 471 states and 652 transitions. [2022-07-21 05:11:14,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-21 05:11:14,223 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 652 transitions. [2022-07-21 05:11:14,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-21 05:11:14,225 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:11:14,226 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] [2022-07-21 05:11:14,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-21 05:11:14,226 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:11:14,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:11:14,226 INFO L85 PathProgramCache]: Analyzing trace with hash -713666185, now seen corresponding path program 1 times [2022-07-21 05:11:14,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:11:14,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980339427] [2022-07-21 05:11:14,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:11:14,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:11:14,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:14,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:11:14,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:14,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-21 05:11:14,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:14,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-21 05:11:14,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:14,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-21 05:11:14,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:14,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-21 05:11:14,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:14,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:11:14,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:11:14,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980339427] [2022-07-21 05:11:14,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980339427] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:11:14,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:11:14,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 05:11:14,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785006356] [2022-07-21 05:11:14,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:11:14,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 05:11:14,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:11:14,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 05:11:14,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 05:11:14,285 INFO L87 Difference]: Start difference. First operand 471 states and 652 transitions. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-21 05:11:14,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:11:14,506 INFO L93 Difference]: Finished difference Result 1484 states and 2066 transitions. [2022-07-21 05:11:14,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 05:11:14,506 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 60 [2022-07-21 05:11:14,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:11:14,510 INFO L225 Difference]: With dead ends: 1484 [2022-07-21 05:11:14,510 INFO L226 Difference]: Without dead ends: 1025 [2022-07-21 05:11:14,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-07-21 05:11:14,511 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 251 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 810 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 05:11:14,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 810 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 05:11:14,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1025 states. [2022-07-21 05:11:14,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1025 to 879. [2022-07-21 05:11:14,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 879 states, 739 states have (on average 1.3843031123139378) internal successors, (1023), 753 states have internal predecessors, (1023), 91 states have call successors, (91), 49 states have call predecessors, (91), 48 states have return successors, (93), 77 states have call predecessors, (93), 88 states have call successors, (93) [2022-07-21 05:11:14,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 1207 transitions. [2022-07-21 05:11:14,566 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 1207 transitions. Word has length 60 [2022-07-21 05:11:14,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:11:14,567 INFO L495 AbstractCegarLoop]: Abstraction has 879 states and 1207 transitions. [2022-07-21 05:11:14,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-21 05:11:14,567 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 1207 transitions. [2022-07-21 05:11:14,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-21 05:11:14,567 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:11:14,567 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:11:14,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-21 05:11:14,568 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:11:14,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:11:14,568 INFO L85 PathProgramCache]: Analyzing trace with hash 196410881, now seen corresponding path program 1 times [2022-07-21 05:11:14,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:11:14,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13859123] [2022-07-21 05:11:14,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:11:14,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:11:14,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:14,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:11:14,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:14,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-21 05:11:14,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:14,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-21 05:11:14,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:14,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-21 05:11:14,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:14,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-21 05:11:14,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:14,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-21 05:11:14,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:14,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:11:14,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:11:14,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13859123] [2022-07-21 05:11:14,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13859123] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:11:14,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258688522] [2022-07-21 05:11:14,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:11:14,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:11:14,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:11:14,656 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) [2022-07-21 05:11:14,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 05:11:14,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:14,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 05:11:14,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:11:14,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:11:14,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:11:15,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:11:15,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258688522] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-21 05:11:15,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-21 05:11:15,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 6] total 8 [2022-07-21 05:11:15,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820520852] [2022-07-21 05:11:15,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:11:15,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 05:11:15,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:11:15,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 05:11:15,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-21 05:11:15,007 INFO L87 Difference]: Start difference. First operand 879 states and 1207 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 5 states have internal predecessors, (57), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-21 05:11:15,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:11:15,262 INFO L93 Difference]: Finished difference Result 2439 states and 3369 transitions. [2022-07-21 05:11:15,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 05:11:15,263 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 5 states have internal predecessors, (57), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 71 [2022-07-21 05:11:15,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:11:15,270 INFO L225 Difference]: With dead ends: 2439 [2022-07-21 05:11:15,270 INFO L226 Difference]: Without dead ends: 1671 [2022-07-21 05:11:15,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 149 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-07-21 05:11:15,275 INFO L413 NwaCegarLoop]: 336 mSDtfsCounter, 293 mSDsluCounter, 1006 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 1342 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 05:11:15,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [295 Valid, 1342 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 05:11:15,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1671 states. [2022-07-21 05:11:15,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1671 to 1642. [2022-07-21 05:11:15,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1642 states, 1386 states have (on average 1.3816738816738816) internal successors, (1915), 1409 states have internal predecessors, (1915), 165 states have call successors, (165), 91 states have call predecessors, (165), 90 states have return successors, (172), 142 states have call predecessors, (172), 162 states have call successors, (172) [2022-07-21 05:11:15,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1642 states to 1642 states and 2252 transitions. [2022-07-21 05:11:15,367 INFO L78 Accepts]: Start accepts. Automaton has 1642 states and 2252 transitions. Word has length 71 [2022-07-21 05:11:15,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:11:15,368 INFO L495 AbstractCegarLoop]: Abstraction has 1642 states and 2252 transitions. [2022-07-21 05:11:15,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 5 states have internal predecessors, (57), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-21 05:11:15,368 INFO L276 IsEmpty]: Start isEmpty. Operand 1642 states and 2252 transitions. [2022-07-21 05:11:15,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-21 05:11:15,369 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:11:15,369 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] [2022-07-21 05:11:15,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 05:11:15,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:11:15,572 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:11:15,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:11:15,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1792983441, now seen corresponding path program 1 times [2022-07-21 05:11:15,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:11:15,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442920381] [2022-07-21 05:11:15,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:11:15,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:11:15,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:15,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:11:15,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:15,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-21 05:11:15,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:15,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-21 05:11:15,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:15,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-21 05:11:15,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:15,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-21 05:11:15,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:15,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-21 05:11:15,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:15,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:11:15,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:11:15,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442920381] [2022-07-21 05:11:15,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442920381] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:11:15,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:11:15,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 05:11:15,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767352416] [2022-07-21 05:11:15,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:11:15,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 05:11:15,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:11:15,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 05:11:15,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 05:11:15,624 INFO L87 Difference]: Start difference. First operand 1642 states and 2252 transitions. Second operand has 6 states, 6 states have (on average 10.0) internal successors, (60), 4 states have internal predecessors, (60), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-21 05:11:16,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:11:16,070 INFO L93 Difference]: Finished difference Result 5206 states and 7235 transitions. [2022-07-21 05:11:16,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 05:11:16,070 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 4 states have internal predecessors, (60), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 73 [2022-07-21 05:11:16,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:11:16,082 INFO L225 Difference]: With dead ends: 5206 [2022-07-21 05:11:16,083 INFO L226 Difference]: Without dead ends: 3576 [2022-07-21 05:11:16,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-07-21 05:11:16,087 INFO L413 NwaCegarLoop]: 262 mSDtfsCounter, 381 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 760 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 05:11:16,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [387 Valid, 760 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 05:11:16,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3576 states. [2022-07-21 05:11:16,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3576 to 3256. [2022-07-21 05:11:16,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3256 states, 2779 states have (on average 1.3609211946743434) internal successors, (3782), 2820 states have internal predecessors, (3782), 292 states have call successors, (292), 170 states have call predecessors, (292), 184 states have return successors, (401), 267 states have call predecessors, (401), 289 states have call successors, (401) [2022-07-21 05:11:16,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3256 states to 3256 states and 4475 transitions. [2022-07-21 05:11:16,269 INFO L78 Accepts]: Start accepts. Automaton has 3256 states and 4475 transitions. Word has length 73 [2022-07-21 05:11:16,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:11:16,269 INFO L495 AbstractCegarLoop]: Abstraction has 3256 states and 4475 transitions. [2022-07-21 05:11:16,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 4 states have internal predecessors, (60), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-21 05:11:16,270 INFO L276 IsEmpty]: Start isEmpty. Operand 3256 states and 4475 transitions. [2022-07-21 05:11:16,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-21 05:11:16,271 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:11:16,271 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] [2022-07-21 05:11:16,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-21 05:11:16,272 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:11:16,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:11:16,272 INFO L85 PathProgramCache]: Analyzing trace with hash 815804017, now seen corresponding path program 1 times [2022-07-21 05:11:16,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:11:16,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666527517] [2022-07-21 05:11:16,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:11:16,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:11:16,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:16,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:11:16,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:16,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-21 05:11:16,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:16,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-21 05:11:16,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:16,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-21 05:11:16,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:16,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-21 05:11:16,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:16,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-21 05:11:16,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:16,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:11:16,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:11:16,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666527517] [2022-07-21 05:11:16,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666527517] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:11:16,300 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:11:16,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 05:11:16,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467890665] [2022-07-21 05:11:16,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:11:16,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 05:11:16,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:11:16,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 05:11:16,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 05:11:16,302 INFO L87 Difference]: Start difference. First operand 3256 states and 4475 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-21 05:11:16,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:11:16,583 INFO L93 Difference]: Finished difference Result 6861 states and 9459 transitions. [2022-07-21 05:11:16,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 05:11:16,583 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 73 [2022-07-21 05:11:16,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:11:16,603 INFO L225 Difference]: With dead ends: 6861 [2022-07-21 05:11:16,604 INFO L226 Difference]: Without dead ends: 3616 [2022-07-21 05:11:16,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-21 05:11:16,613 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 306 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 05:11:16,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [322 Valid, 342 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 05:11:16,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3616 states. [2022-07-21 05:11:16,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3616 to 3251. [2022-07-21 05:11:16,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3251 states, 2777 states have (on average 1.3604609290601368) internal successors, (3778), 2817 states have internal predecessors, (3778), 289 states have call successors, (289), 170 states have call predecessors, (289), 184 states have return successors, (397), 264 states have call predecessors, (397), 286 states have call successors, (397) [2022-07-21 05:11:16,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3251 states to 3251 states and 4464 transitions. [2022-07-21 05:11:16,835 INFO L78 Accepts]: Start accepts. Automaton has 3251 states and 4464 transitions. Word has length 73 [2022-07-21 05:11:16,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:11:16,835 INFO L495 AbstractCegarLoop]: Abstraction has 3251 states and 4464 transitions. [2022-07-21 05:11:16,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-21 05:11:16,835 INFO L276 IsEmpty]: Start isEmpty. Operand 3251 states and 4464 transitions. [2022-07-21 05:11:16,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-21 05:11:16,836 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:11:16,836 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] [2022-07-21 05:11:16,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-21 05:11:16,837 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:11:16,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:11:16,837 INFO L85 PathProgramCache]: Analyzing trace with hash 2040025620, now seen corresponding path program 1 times [2022-07-21 05:11:16,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:11:16,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256787178] [2022-07-21 05:11:16,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:11:16,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:11:16,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:16,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:11:16,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:16,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-21 05:11:16,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:16,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-21 05:11:16,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:16,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-21 05:11:16,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:16,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-21 05:11:16,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:16,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-21 05:11:16,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:16,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:11:16,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:11:16,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256787178] [2022-07-21 05:11:16,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256787178] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:11:16,898 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:11:16,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 05:11:16,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819387691] [2022-07-21 05:11:16,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:11:16,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 05:11:16,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:11:16,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 05:11:16,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 05:11:16,900 INFO L87 Difference]: Start difference. First operand 3251 states and 4464 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-21 05:11:17,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:11:17,383 INFO L93 Difference]: Finished difference Result 9419 states and 13042 transitions. [2022-07-21 05:11:17,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 05:11:17,384 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 74 [2022-07-21 05:11:17,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:11:17,410 INFO L225 Difference]: With dead ends: 9419 [2022-07-21 05:11:17,411 INFO L226 Difference]: Without dead ends: 6179 [2022-07-21 05:11:17,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-21 05:11:17,422 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 377 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 05:11:17,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [389 Valid, 511 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 05:11:17,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6179 states. [2022-07-21 05:11:17,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6179 to 5119. [2022-07-21 05:11:17,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5119 states, 4336 states have (on average 1.3279520295202951) internal successors, (5758), 4400 states have internal predecessors, (5758), 475 states have call successors, (475), 283 states have call predecessors, (475), 307 states have return successors, (665), 436 states have call predecessors, (665), 472 states have call successors, (665) [2022-07-21 05:11:17,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5119 states to 5119 states and 6898 transitions. [2022-07-21 05:11:17,735 INFO L78 Accepts]: Start accepts. Automaton has 5119 states and 6898 transitions. Word has length 74 [2022-07-21 05:11:17,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:11:17,736 INFO L495 AbstractCegarLoop]: Abstraction has 5119 states and 6898 transitions. [2022-07-21 05:11:17,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-21 05:11:17,736 INFO L276 IsEmpty]: Start isEmpty. Operand 5119 states and 6898 transitions. [2022-07-21 05:11:17,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-21 05:11:17,737 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:11:17,737 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] [2022-07-21 05:11:17,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-21 05:11:17,738 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:11:17,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:11:17,738 INFO L85 PathProgramCache]: Analyzing trace with hash 71967124, now seen corresponding path program 1 times [2022-07-21 05:11:17,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:11:17,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939455414] [2022-07-21 05:11:17,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:11:17,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:11:17,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:17,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:11:17,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:17,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-21 05:11:17,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:17,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-21 05:11:17,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:17,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-21 05:11:17,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:17,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-21 05:11:17,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:17,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-21 05:11:17,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:17,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:11:17,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:11:17,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939455414] [2022-07-21 05:11:17,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939455414] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:11:17,804 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:11:17,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-21 05:11:17,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390062381] [2022-07-21 05:11:17,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:11:17,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 05:11:17,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:11:17,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 05:11:17,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-21 05:11:17,806 INFO L87 Difference]: Start difference. First operand 5119 states and 6898 transitions. Second operand has 8 states, 8 states have (on average 7.75) internal successors, (62), 6 states have internal predecessors, (62), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-21 05:11:18,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:11:18,934 INFO L93 Difference]: Finished difference Result 15278 states and 21190 transitions. [2022-07-21 05:11:18,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-21 05:11:18,935 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 6 states have internal predecessors, (62), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 75 [2022-07-21 05:11:18,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:11:18,981 INFO L225 Difference]: With dead ends: 15278 [2022-07-21 05:11:18,982 INFO L226 Difference]: Without dead ends: 10347 [2022-07-21 05:11:18,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2022-07-21 05:11:18,997 INFO L413 NwaCegarLoop]: 333 mSDtfsCounter, 809 mSDsluCounter, 999 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 840 SdHoareTripleChecker+Valid, 1332 SdHoareTripleChecker+Invalid, 1033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 05:11:18,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [840 Valid, 1332 Invalid, 1033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 888 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-21 05:11:19,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10347 states. [2022-07-21 05:11:19,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10347 to 7517. [2022-07-21 05:11:19,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7517 states, 6382 states have (on average 1.3281103102475713) internal successors, (8476), 6462 states have internal predecessors, (8476), 687 states have call successors, (687), 411 states have call predecessors, (687), 447 states have return successors, (971), 644 states have call predecessors, (971), 684 states have call successors, (971) [2022-07-21 05:11:19,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7517 states to 7517 states and 10134 transitions. [2022-07-21 05:11:19,442 INFO L78 Accepts]: Start accepts. Automaton has 7517 states and 10134 transitions. Word has length 75 [2022-07-21 05:11:19,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:11:19,443 INFO L495 AbstractCegarLoop]: Abstraction has 7517 states and 10134 transitions. [2022-07-21 05:11:19,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 6 states have internal predecessors, (62), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-21 05:11:19,443 INFO L276 IsEmpty]: Start isEmpty. Operand 7517 states and 10134 transitions. [2022-07-21 05:11:19,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-21 05:11:19,444 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:11:19,445 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-21 05:11:19,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-21 05:11:19,445 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:11:19,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:11:19,445 INFO L85 PathProgramCache]: Analyzing trace with hash -494723516, now seen corresponding path program 1 times [2022-07-21 05:11:19,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:11:19,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700039441] [2022-07-21 05:11:19,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:11:19,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:11:19,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:19,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:11:19,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:19,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-21 05:11:19,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:19,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-21 05:11:19,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:19,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-21 05:11:19,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:19,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-21 05:11:19,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:19,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-21 05:11:19,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:19,487 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-21 05:11:19,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:11:19,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700039441] [2022-07-21 05:11:19,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700039441] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:11:19,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525471112] [2022-07-21 05:11:19,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:11:19,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:11:19,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:11:19,489 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) [2022-07-21 05:11:19,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 05:11:19,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:19,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-21 05:11:19,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:11:19,566 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:11:19,567 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 05:11:19,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525471112] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:11:19,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 05:11:19,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-07-21 05:11:19,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116610774] [2022-07-21 05:11:19,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:11:19,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 05:11:19,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:11:19,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 05:11:19,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 05:11:19,569 INFO L87 Difference]: Start difference. First operand 7517 states and 10134 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-21 05:11:20,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:11:20,291 INFO L93 Difference]: Finished difference Result 19768 states and 26912 transitions. [2022-07-21 05:11:20,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 05:11:20,292 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 79 [2022-07-21 05:11:20,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:11:20,362 INFO L225 Difference]: With dead ends: 19768 [2022-07-21 05:11:20,363 INFO L226 Difference]: Without dead ends: 12263 [2022-07-21 05:11:20,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 05:11:20,378 INFO L413 NwaCegarLoop]: 313 mSDtfsCounter, 130 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 05:11:20,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 484 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 05:11:20,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12263 states. [2022-07-21 05:11:20,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12263 to 11694. [2022-07-21 05:11:20,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11694 states, 9881 states have (on average 1.317984009715616) internal successors, (13023), 10011 states have internal predecessors, (13023), 1097 states have call successors, (1097), 657 states have call predecessors, (1097), 715 states have return successors, (1717), 1027 states have call predecessors, (1717), 1094 states have call successors, (1717) [2022-07-21 05:11:21,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11694 states to 11694 states and 15837 transitions. [2022-07-21 05:11:21,016 INFO L78 Accepts]: Start accepts. Automaton has 11694 states and 15837 transitions. Word has length 79 [2022-07-21 05:11:21,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:11:21,017 INFO L495 AbstractCegarLoop]: Abstraction has 11694 states and 15837 transitions. [2022-07-21 05:11:21,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-21 05:11:21,018 INFO L276 IsEmpty]: Start isEmpty. Operand 11694 states and 15837 transitions. [2022-07-21 05:11:21,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-07-21 05:11:21,021 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:11:21,021 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:11:21,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 05:11:21,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-21 05:11:21,239 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:11:21,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:11:21,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1645371471, now seen corresponding path program 1 times [2022-07-21 05:11:21,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:11:21,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433038912] [2022-07-21 05:11:21,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:11:21,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:11:21,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:21,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:11:21,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:21,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-21 05:11:21,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:21,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-21 05:11:21,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:21,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-21 05:11:21,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:21,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-21 05:11:21,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:21,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-21 05:11:21,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:21,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-21 05:11:21,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:21,294 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 05:11:21,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:11:21,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433038912] [2022-07-21 05:11:21,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433038912] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:11:21,294 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:11:21,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 05:11:21,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520193006] [2022-07-21 05:11:21,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:11:21,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 05:11:21,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:11:21,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 05:11:21,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-21 05:11:21,297 INFO L87 Difference]: Start difference. First operand 11694 states and 15837 transitions. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-21 05:11:22,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:11:22,819 INFO L93 Difference]: Finished difference Result 29375 states and 39949 transitions. [2022-07-21 05:11:22,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-21 05:11:22,820 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 84 [2022-07-21 05:11:22,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:11:22,883 INFO L225 Difference]: With dead ends: 29375 [2022-07-21 05:11:22,883 INFO L226 Difference]: Without dead ends: 19172 [2022-07-21 05:11:22,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-07-21 05:11:22,911 INFO L413 NwaCegarLoop]: 484 mSDtfsCounter, 790 mSDsluCounter, 838 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 822 SdHoareTripleChecker+Valid, 1322 SdHoareTripleChecker+Invalid, 884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 05:11:22,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [822 Valid, 1322 Invalid, 884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 802 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-21 05:11:22,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19172 states. [2022-07-21 05:11:23,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19172 to 16112. [2022-07-21 05:11:23,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16112 states, 13703 states have (on average 1.3265708239071736) internal successors, (18178), 13913 states have internal predecessors, (18178), 1425 states have call successors, (1425), 853 states have call predecessors, (1425), 983 states have return successors, (2443), 1347 states have call predecessors, (2443), 1422 states have call successors, (2443) [2022-07-21 05:11:24,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16112 states to 16112 states and 22046 transitions. [2022-07-21 05:11:24,028 INFO L78 Accepts]: Start accepts. Automaton has 16112 states and 22046 transitions. Word has length 84 [2022-07-21 05:11:24,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:11:24,028 INFO L495 AbstractCegarLoop]: Abstraction has 16112 states and 22046 transitions. [2022-07-21 05:11:24,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-21 05:11:24,029 INFO L276 IsEmpty]: Start isEmpty. Operand 16112 states and 22046 transitions. [2022-07-21 05:11:24,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-07-21 05:11:24,032 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:11:24,032 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:11:24,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-21 05:11:24,033 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:11:24,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:11:24,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1168082145, now seen corresponding path program 1 times [2022-07-21 05:11:24,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:11:24,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881458173] [2022-07-21 05:11:24,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:11:24,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:11:24,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:24,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:11:24,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:24,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-21 05:11:24,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:24,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-21 05:11:24,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:24,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-21 05:11:24,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:24,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-21 05:11:24,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:24,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-21 05:11:24,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:24,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-21 05:11:24,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:24,112 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 05:11:24,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:11:24,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881458173] [2022-07-21 05:11:24,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881458173] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:11:24,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:11:24,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-21 05:11:24,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110122620] [2022-07-21 05:11:24,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:11:24,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 05:11:24,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:11:24,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 05:11:24,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-21 05:11:24,114 INFO L87 Difference]: Start difference. First operand 16112 states and 22046 transitions. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 6 states have internal predecessors, (70), 3 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-21 05:11:26,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:11:26,749 INFO L93 Difference]: Finished difference Result 49472 states and 70036 transitions. [2022-07-21 05:11:26,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 05:11:26,749 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 6 states have internal predecessors, (70), 3 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 87 [2022-07-21 05:11:26,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:11:26,862 INFO L225 Difference]: With dead ends: 49472 [2022-07-21 05:11:26,863 INFO L226 Difference]: Without dead ends: 34851 [2022-07-21 05:11:26,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2022-07-21 05:11:26,907 INFO L413 NwaCegarLoop]: 752 mSDtfsCounter, 1090 mSDsluCounter, 2029 mSDsCounter, 0 mSdLazyCounter, 1651 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1134 SdHoareTripleChecker+Valid, 2781 SdHoareTripleChecker+Invalid, 1836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 1651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-21 05:11:26,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1134 Valid, 2781 Invalid, 1836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 1651 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-21 05:11:26,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34851 states. [2022-07-21 05:11:28,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34851 to 23243. [2022-07-21 05:11:28,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23243 states, 19826 states have (on average 1.331887420558862) internal successors, (26406), 20106 states have internal predecessors, (26406), 2016 states have call successors, (2016), 1207 states have call predecessors, (2016), 1400 states have return successors, (3536), 1931 states have call predecessors, (3536), 2013 states have call successors, (3536) [2022-07-21 05:11:28,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23243 states to 23243 states and 31958 transitions. [2022-07-21 05:11:28,524 INFO L78 Accepts]: Start accepts. Automaton has 23243 states and 31958 transitions. Word has length 87 [2022-07-21 05:11:28,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:11:28,525 INFO L495 AbstractCegarLoop]: Abstraction has 23243 states and 31958 transitions. [2022-07-21 05:11:28,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 6 states have internal predecessors, (70), 3 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-21 05:11:28,525 INFO L276 IsEmpty]: Start isEmpty. Operand 23243 states and 31958 transitions. [2022-07-21 05:11:28,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-07-21 05:11:28,532 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:11:28,533 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2022-07-21 05:11:28,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-21 05:11:28,533 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:11:28,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:11:28,533 INFO L85 PathProgramCache]: Analyzing trace with hash 799954536, now seen corresponding path program 1 times [2022-07-21 05:11:28,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:11:28,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482744944] [2022-07-21 05:11:28,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:11:28,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:11:28,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:28,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:11:28,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:28,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-21 05:11:28,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:28,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-21 05:11:28,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:28,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-21 05:11:28,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:28,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-21 05:11:28,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:28,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-21 05:11:28,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:28,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-21 05:11:28,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:28,594 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 05:11:28,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:11:28,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482744944] [2022-07-21 05:11:28,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482744944] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:11:28,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:11:28,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 05:11:28,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114708501] [2022-07-21 05:11:28,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:11:28,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 05:11:28,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:11:28,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 05:11:28,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-21 05:11:28,597 INFO L87 Difference]: Start difference. First operand 23243 states and 31958 transitions. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 5 states have internal predecessors, (78), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-21 05:11:32,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:11:32,050 INFO L93 Difference]: Finished difference Result 71102 states and 99170 transitions. [2022-07-21 05:11:32,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-21 05:11:32,051 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 5 states have internal predecessors, (78), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 95 [2022-07-21 05:11:32,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:11:32,222 INFO L225 Difference]: With dead ends: 71102 [2022-07-21 05:11:32,223 INFO L226 Difference]: Without dead ends: 47875 [2022-07-21 05:11:32,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2022-07-21 05:11:32,299 INFO L413 NwaCegarLoop]: 346 mSDtfsCounter, 1170 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1185 SdHoareTripleChecker+Valid, 1076 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 05:11:32,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1185 Valid, 1076 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 628 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-21 05:11:32,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47875 states. [2022-07-21 05:11:34,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47875 to 44970. [2022-07-21 05:11:34,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44970 states, 38263 states have (on average 1.3047068970023261) internal successors, (49922), 38798 states have internal predecessors, (49922), 3900 states have call successors, (3900), 2376 states have call predecessors, (3900), 2806 states have return successors, (7008), 3797 states have call predecessors, (7008), 3897 states have call successors, (7008) [2022-07-21 05:11:35,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44970 states to 44970 states and 60830 transitions. [2022-07-21 05:11:35,062 INFO L78 Accepts]: Start accepts. Automaton has 44970 states and 60830 transitions. Word has length 95 [2022-07-21 05:11:35,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:11:35,062 INFO L495 AbstractCegarLoop]: Abstraction has 44970 states and 60830 transitions. [2022-07-21 05:11:35,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 5 states have internal predecessors, (78), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-21 05:11:35,063 INFO L276 IsEmpty]: Start isEmpty. Operand 44970 states and 60830 transitions. [2022-07-21 05:11:35,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-07-21 05:11:35,067 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:11:35,067 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:11:35,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-21 05:11:35,068 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:11:35,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:11:35,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1050949112, now seen corresponding path program 1 times [2022-07-21 05:11:35,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:11:35,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636288726] [2022-07-21 05:11:35,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:11:35,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:11:35,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:35,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:11:35,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:35,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-21 05:11:35,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:35,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-21 05:11:35,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:35,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-21 05:11:35,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:35,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-21 05:11:35,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:35,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-21 05:11:35,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:35,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-21 05:11:35,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:35,115 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 05:11:35,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:11:35,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636288726] [2022-07-21 05:11:35,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636288726] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:11:35,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581940072] [2022-07-21 05:11:35,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:11:35,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:11:35,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:11:35,124 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:11:35,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 05:11:35,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:35,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-21 05:11:35,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:11:35,274 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:11:35,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:11:35,392 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 05:11:35,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581940072] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-21 05:11:35,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-21 05:11:35,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 7] total 15 [2022-07-21 05:11:35,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194867880] [2022-07-21 05:11:35,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:11:35,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 05:11:35,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:11:35,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 05:11:35,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-07-21 05:11:35,394 INFO L87 Difference]: Start difference. First operand 44970 states and 60830 transitions. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 7 states have internal predecessors, (77), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-21 05:11:38,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:11:38,509 INFO L93 Difference]: Finished difference Result 47654 states and 64186 transitions. [2022-07-21 05:11:38,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 05:11:38,510 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 7 states have internal predecessors, (77), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 96 [2022-07-21 05:11:38,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:11:38,628 INFO L225 Difference]: With dead ends: 47654 [2022-07-21 05:11:38,628 INFO L226 Difference]: Without dead ends: 47651 [2022-07-21 05:11:38,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 198 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2022-07-21 05:11:38,647 INFO L413 NwaCegarLoop]: 223 mSDtfsCounter, 429 mSDsluCounter, 753 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 976 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 05:11:38,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [435 Valid, 976 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 05:11:38,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47651 states. [2022-07-21 05:11:41,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47651 to 46066. [2022-07-21 05:11:41,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46066 states, 39178 states have (on average 1.3019041298688039) internal successors, (51006), 39731 states have internal predecessors, (51006), 4006 states have call successors, (4006), 2443 states have call predecessors, (4006), 2881 states have return successors, (7155), 3893 states have call predecessors, (7155), 4003 states have call successors, (7155) [2022-07-21 05:11:41,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46066 states to 46066 states and 62167 transitions. [2022-07-21 05:11:41,588 INFO L78 Accepts]: Start accepts. Automaton has 46066 states and 62167 transitions. Word has length 96 [2022-07-21 05:11:41,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:11:41,588 INFO L495 AbstractCegarLoop]: Abstraction has 46066 states and 62167 transitions. [2022-07-21 05:11:41,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 7 states have internal predecessors, (77), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-21 05:11:41,588 INFO L276 IsEmpty]: Start isEmpty. Operand 46066 states and 62167 transitions. [2022-07-21 05:11:41,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-07-21 05:11:41,593 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:11:41,593 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:11:41,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 05:11:41,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:11:41,813 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:11:41,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:11:41,814 INFO L85 PathProgramCache]: Analyzing trace with hash -536746609, now seen corresponding path program 1 times [2022-07-21 05:11:41,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:11:41,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827938933] [2022-07-21 05:11:41,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:11:41,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:11:41,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:41,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:11:41,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:41,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-21 05:11:41,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:41,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-21 05:11:41,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:41,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-21 05:11:41,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:41,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-21 05:11:41,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:41,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-21 05:11:41,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:41,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-21 05:11:41,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:41,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-07-21 05:11:41,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:41,874 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 05:11:41,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:11:41,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827938933] [2022-07-21 05:11:41,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827938933] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:11:41,875 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:11:41,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 05:11:41,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689000409] [2022-07-21 05:11:41,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:11:41,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 05:11:41,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:11:41,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 05:11:41,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 05:11:41,876 INFO L87 Difference]: Start difference. First operand 46066 states and 62167 transitions. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 4 states have internal predecessors, (74), 3 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-21 05:11:45,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:11:45,124 INFO L93 Difference]: Finished difference Result 95917 states and 129334 transitions. [2022-07-21 05:11:45,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 05:11:45,125 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 4 states have internal predecessors, (74), 3 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 97 [2022-07-21 05:11:45,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:11:45,261 INFO L225 Difference]: With dead ends: 95917 [2022-07-21 05:11:45,261 INFO L226 Difference]: Without dead ends: 49867 [2022-07-21 05:11:45,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-07-21 05:11:45,348 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 427 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 05:11:45,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [433 Valid, 495 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 05:11:45,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49867 states. [2022-07-21 05:11:48,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49867 to 45954. [2022-07-21 05:11:48,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45954 states, 38954 states have (on average 1.293731067412846) internal successors, (50396), 39619 states have internal predecessors, (50396), 4006 states have call successors, (4006), 2443 states have call predecessors, (4006), 2993 states have return successors, (6707), 3893 states have call predecessors, (6707), 4003 states have call successors, (6707) [2022-07-21 05:11:48,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45954 states to 45954 states and 61109 transitions. [2022-07-21 05:11:48,192 INFO L78 Accepts]: Start accepts. Automaton has 45954 states and 61109 transitions. Word has length 97 [2022-07-21 05:11:48,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:11:48,193 INFO L495 AbstractCegarLoop]: Abstraction has 45954 states and 61109 transitions. [2022-07-21 05:11:48,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 4 states have internal predecessors, (74), 3 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-21 05:11:48,193 INFO L276 IsEmpty]: Start isEmpty. Operand 45954 states and 61109 transitions. [2022-07-21 05:11:48,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-07-21 05:11:48,199 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:11:48,199 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:11:48,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-21 05:11:48,199 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:11:48,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:11:48,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1531440307, now seen corresponding path program 1 times [2022-07-21 05:11:48,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:11:48,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149005523] [2022-07-21 05:11:48,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:11:48,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:11:48,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:48,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:11:48,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:48,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-21 05:11:48,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:48,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-21 05:11:48,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:48,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-21 05:11:48,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:48,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-21 05:11:48,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:48,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-21 05:11:48,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:48,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-21 05:11:48,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:48,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-07-21 05:11:48,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:48,236 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-21 05:11:48,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:11:48,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149005523] [2022-07-21 05:11:48,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149005523] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:11:48,237 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:11:48,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 05:11:48,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015817145] [2022-07-21 05:11:48,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:11:48,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 05:11:48,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:11:48,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 05:11:48,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 05:11:48,239 INFO L87 Difference]: Start difference. First operand 45954 states and 61109 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 3 states have internal predecessors, (67), 2 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-21 05:11:51,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:11:51,072 INFO L93 Difference]: Finished difference Result 52170 states and 69546 transitions. [2022-07-21 05:11:51,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 05:11:51,072 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 3 states have internal predecessors, (67), 2 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 97 [2022-07-21 05:11:51,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:11:51,213 INFO L225 Difference]: With dead ends: 52170 [2022-07-21 05:11:51,213 INFO L226 Difference]: Without dead ends: 49664 [2022-07-21 05:11:51,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-21 05:11:51,237 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 310 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 05:11:51,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 337 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 05:11:51,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49664 states. [2022-07-21 05:11:54,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49664 to 45789. [2022-07-21 05:11:54,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45789 states, 38819 states have (on average 1.2939797521832093) internal successors, (50231), 39482 states have internal predecessors, (50231), 3987 states have call successors, (3987), 2433 states have call predecessors, (3987), 2982 states have return successors, (6686), 3874 states have call predecessors, (6686), 3984 states have call successors, (6686) [2022-07-21 05:11:54,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45789 states to 45789 states and 60904 transitions. [2022-07-21 05:11:54,160 INFO L78 Accepts]: Start accepts. Automaton has 45789 states and 60904 transitions. Word has length 97 [2022-07-21 05:11:54,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:11:54,160 INFO L495 AbstractCegarLoop]: Abstraction has 45789 states and 60904 transitions. [2022-07-21 05:11:54,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 3 states have internal predecessors, (67), 2 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-21 05:11:54,160 INFO L276 IsEmpty]: Start isEmpty. Operand 45789 states and 60904 transitions. [2022-07-21 05:11:54,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-07-21 05:11:54,164 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:11:54,164 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:11:54,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-21 05:11:54,164 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:11:54,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:11:54,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1743423476, now seen corresponding path program 1 times [2022-07-21 05:11:54,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:11:54,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929104553] [2022-07-21 05:11:54,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:11:54,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:11:54,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:54,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:11:54,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:54,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-21 05:11:54,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:54,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-21 05:11:54,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:54,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-21 05:11:54,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:54,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-21 05:11:54,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:54,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-21 05:11:54,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:54,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-21 05:11:54,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:54,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-21 05:11:54,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:54,199 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 05:11:54,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:11:54,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929104553] [2022-07-21 05:11:54,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929104553] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:11:54,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:11:54,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 05:11:54,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853604902] [2022-07-21 05:11:54,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:11:54,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 05:11:54,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:11:54,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 05:11:54,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-21 05:11:54,201 INFO L87 Difference]: Start difference. First operand 45789 states and 60904 transitions. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 5 states have internal predecessors, (77), 4 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-21 05:11:57,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:11:57,728 INFO L93 Difference]: Finished difference Result 94432 states and 125632 transitions. [2022-07-21 05:11:57,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-21 05:11:57,729 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 5 states have internal predecessors, (77), 4 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 98 [2022-07-21 05:11:57,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:11:57,846 INFO L225 Difference]: With dead ends: 94432 [2022-07-21 05:11:57,846 INFO L226 Difference]: Without dead ends: 48655 [2022-07-21 05:11:57,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2022-07-21 05:11:57,922 INFO L413 NwaCegarLoop]: 332 mSDtfsCounter, 1260 mSDsluCounter, 693 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1275 SdHoareTripleChecker+Valid, 1025 SdHoareTripleChecker+Invalid, 872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 05:11:57,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1275 Valid, 1025 Invalid, 872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 640 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 05:11:57,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48655 states. [2022-07-21 05:12:00,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48655 to 45927. [2022-07-21 05:12:00,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45927 states, 38957 states have (on average 1.2860846574428215) internal successors, (50102), 39620 states have internal predecessors, (50102), 3987 states have call successors, (3987), 2433 states have call predecessors, (3987), 2982 states have return successors, (6350), 3874 states have call predecessors, (6350), 3984 states have call successors, (6350) [2022-07-21 05:12:00,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45927 states to 45927 states and 60439 transitions. [2022-07-21 05:12:00,843 INFO L78 Accepts]: Start accepts. Automaton has 45927 states and 60439 transitions. Word has length 98 [2022-07-21 05:12:00,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:12:00,844 INFO L495 AbstractCegarLoop]: Abstraction has 45927 states and 60439 transitions. [2022-07-21 05:12:00,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 5 states have internal predecessors, (77), 4 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-21 05:12:00,844 INFO L276 IsEmpty]: Start isEmpty. Operand 45927 states and 60439 transitions. [2022-07-21 05:12:00,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-07-21 05:12:00,850 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:12:00,850 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-07-21 05:12:00,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-21 05:12:00,851 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:12:00,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:12:00,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1897517852, now seen corresponding path program 1 times [2022-07-21 05:12:00,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:12:00,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720172761] [2022-07-21 05:12:00,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:12:00,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:12:00,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:00,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:12:00,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:00,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-21 05:12:00,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:00,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-21 05:12:00,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:00,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-21 05:12:00,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:00,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-21 05:12:00,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:00,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-21 05:12:00,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:00,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-21 05:12:00,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:00,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-07-21 05:12:00,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:00,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-07-21 05:12:00,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:00,896 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-07-21 05:12:00,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:12:00,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720172761] [2022-07-21 05:12:00,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720172761] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:12:00,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:12:00,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 05:12:00,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120261689] [2022-07-21 05:12:00,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:12:00,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 05:12:00,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:12:00,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 05:12:00,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 05:12:00,898 INFO L87 Difference]: Start difference. First operand 45927 states and 60439 transitions. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-21 05:12:05,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:12:05,867 INFO L93 Difference]: Finished difference Result 124499 states and 164719 transitions. [2022-07-21 05:12:05,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 05:12:05,867 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 120 [2022-07-21 05:12:05,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:12:06,085 INFO L225 Difference]: With dead ends: 124499 [2022-07-21 05:12:06,085 INFO L226 Difference]: Without dead ends: 79685 [2022-07-21 05:12:06,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-21 05:12:06,182 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 396 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 05:12:06,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [405 Valid, 496 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 05:12:06,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79685 states.