./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/systemc/token_ring.04.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/systemc/token_ring.04.cil-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 05d3b7d21cc48825b4a0189c75f03d768acc6241312029d3e223c1b9b2a509ea --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 17:52:08,510 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 17:52:08,512 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 17:52:08,559 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 17:52:08,560 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 17:52:08,561 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 17:52:08,563 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 17:52:08,565 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 17:52:08,566 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 17:52:08,570 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 17:52:08,571 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 17:52:08,573 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 17:52:08,573 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 17:52:08,575 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 17:52:08,576 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 17:52:08,580 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 17:52:08,581 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 17:52:08,582 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 17:52:08,583 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 17:52:08,590 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 17:52:08,592 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 17:52:08,592 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 17:52:08,593 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 17:52:08,594 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 17:52:08,595 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 17:52:08,602 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 17:52:08,602 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 17:52:08,602 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 17:52:08,603 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 17:52:08,604 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 17:52:08,605 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 17:52:08,605 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 17:52:08,607 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 17:52:08,607 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 17:52:08,608 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 17:52:08,608 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 17:52:08,609 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 17:52:08,609 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 17:52:08,609 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 17:52:08,610 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 17:52:08,611 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 17:52:08,617 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 17:52:08,618 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 17:52:08,660 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 17:52:08,660 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 17:52:08,660 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 17:52:08,660 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 17:52:08,661 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 17:52:08,661 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 17:52:08,662 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 17:52:08,662 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 17:52:08,662 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 17:52:08,662 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 17:52:08,662 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 17:52:08,662 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 17:52:08,663 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 17:52:08,663 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 17:52:08,663 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 17:52:08,665 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 17:52:08,665 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 17:52:08,666 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 17:52:08,667 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 17:52:08,667 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 17:52:08,667 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 17:52:08,668 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 17:52:08,668 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 17:52:08,668 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 17:52:08,669 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 17:52:08,669 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 17:52:08,675 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 17:52:08,676 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 17:52:08,676 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 17:52:08,676 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 17:52:08,677 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 17:52:08,677 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 17:52:08,677 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 17:52:08,677 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 05d3b7d21cc48825b4a0189c75f03d768acc6241312029d3e223c1b9b2a509ea [2022-07-22 17:52:08,892 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 17:52:08,914 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 17:52:08,917 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 17:52:08,918 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 17:52:08,918 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 17:52:08,920 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/systemc/token_ring.04.cil-2.c [2022-07-22 17:52:08,975 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8bc4ca9dd/ba653bfb80774e87a9a7fd3bb5c0246b/FLAG8200ab5ea [2022-07-22 17:52:09,467 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 17:52:09,474 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/token_ring.04.cil-2.c [2022-07-22 17:52:09,489 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8bc4ca9dd/ba653bfb80774e87a9a7fd3bb5c0246b/FLAG8200ab5ea [2022-07-22 17:52:09,969 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8bc4ca9dd/ba653bfb80774e87a9a7fd3bb5c0246b [2022-07-22 17:52:09,974 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 17:52:09,975 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 17:52:09,976 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 17:52:09,976 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 17:52:09,981 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 17:52:09,981 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 05:52:09" (1/1) ... [2022-07-22 17:52:09,982 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@658935b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 05:52:09, skipping insertion in model container [2022-07-22 17:52:09,982 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 05:52:09" (1/1) ... [2022-07-22 17:52:09,988 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 17:52:10,021 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 17:52:10,133 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/token_ring.04.cil-2.c[671,684] [2022-07-22 17:52:10,206 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 17:52:10,214 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 17:52:10,225 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/token_ring.04.cil-2.c[671,684] [2022-07-22 17:52:10,258 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 17:52:10,270 INFO L208 MainTranslator]: Completed translation [2022-07-22 17:52:10,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 05:52:10 WrapperNode [2022-07-22 17:52:10,271 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 17:52:10,272 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 17:52:10,272 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 17:52:10,272 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 17:52:10,281 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 05:52:10" (1/1) ... [2022-07-22 17:52:10,291 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 05:52:10" (1/1) ... [2022-07-22 17:52:10,318 INFO L137 Inliner]: procedures = 36, calls = 44, calls flagged for inlining = 19, calls inlined = 19, statements flattened = 394 [2022-07-22 17:52:10,319 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 17:52:10,320 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 17:52:10,320 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 17:52:10,320 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 17:52:10,328 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 05:52:10" (1/1) ... [2022-07-22 17:52:10,328 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 05:52:10" (1/1) ... [2022-07-22 17:52:10,331 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 05:52:10" (1/1) ... [2022-07-22 17:52:10,331 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 05:52:10" (1/1) ... [2022-07-22 17:52:10,338 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 05:52:10" (1/1) ... [2022-07-22 17:52:10,345 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 05:52:10" (1/1) ... [2022-07-22 17:52:10,348 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 05:52:10" (1/1) ... [2022-07-22 17:52:10,352 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 17:52:10,354 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 17:52:10,354 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 17:52:10,354 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 17:52:10,355 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 05:52:10" (1/1) ... [2022-07-22 17:52:10,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 17:52:10,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 17:52:10,399 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) [2022-07-22 17:52:10,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-22 17:52:10,432 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 17:52:10,432 INFO L130 BoogieDeclarations]: Found specification of procedure error [2022-07-22 17:52:10,432 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2022-07-22 17:52:10,433 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-07-22 17:52:10,433 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-07-22 17:52:10,433 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-07-22 17:52:10,433 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-07-22 17:52:10,435 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-07-22 17:52:10,435 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-07-22 17:52:10,436 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-07-22 17:52:10,436 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-07-22 17:52:10,436 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-07-22 17:52:10,436 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-07-22 17:52:10,436 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 17:52:10,436 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-07-22 17:52:10,437 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-07-22 17:52:10,437 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 17:52:10,437 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 17:52:10,511 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 17:52:10,512 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 17:52:10,992 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 17:52:10,999 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 17:52:11,000 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2022-07-22 17:52:11,007 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 05:52:11 BoogieIcfgContainer [2022-07-22 17:52:11,007 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 17:52:11,009 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 17:52:11,009 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 17:52:11,024 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 17:52:11,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 05:52:09" (1/3) ... [2022-07-22 17:52:11,025 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7decdaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 05:52:11, skipping insertion in model container [2022-07-22 17:52:11,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 05:52:10" (2/3) ... [2022-07-22 17:52:11,026 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7decdaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 05:52:11, skipping insertion in model container [2022-07-22 17:52:11,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 05:52:11" (3/3) ... [2022-07-22 17:52:11,027 INFO L111 eAbstractionObserver]: Analyzing ICFG token_ring.04.cil-2.c [2022-07-22 17:52:11,040 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 17:52:11,041 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 17:52:11,110 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 17:52:11,116 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@1ee7e175, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4ddee65 [2022-07-22 17:52:11,116 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 17:52:11,127 INFO L276 IsEmpty]: Start isEmpty. Operand has 190 states, 161 states have (on average 1.6211180124223603) internal successors, (261), 165 states have internal predecessors, (261), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2022-07-22 17:52:11,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-07-22 17:52:11,146 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 17:52:11,147 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 17:52:11,148 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 17:52:11,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 17:52:11,152 INFO L85 PathProgramCache]: Analyzing trace with hash -256970182, now seen corresponding path program 1 times [2022-07-22 17:52:11,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 17:52:11,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372780255] [2022-07-22 17:52:11,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:52:11,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 17:52:11,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:11,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:52:11,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:11,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 17:52:11,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:11,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-22 17:52:11,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:11,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-22 17:52:11,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:11,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-07-22 17:52:11,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:11,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 17:52:11,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 17:52:11,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372780255] [2022-07-22 17:52:11,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372780255] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 17:52:11,499 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 17:52:11,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 17:52:11,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812434196] [2022-07-22 17:52:11,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 17:52:11,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 17:52:11,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 17:52:11,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 17:52:11,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 17:52:11,542 INFO L87 Difference]: Start difference. First operand has 190 states, 161 states have (on average 1.6211180124223603) internal successors, (261), 165 states have internal predecessors, (261), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 17:52:12,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 17:52:12,214 INFO L93 Difference]: Finished difference Result 422 states and 678 transitions. [2022-07-22 17:52:12,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 17:52:12,216 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 90 [2022-07-22 17:52:12,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 17:52:12,226 INFO L225 Difference]: With dead ends: 422 [2022-07-22 17:52:12,227 INFO L226 Difference]: Without dead ends: 238 [2022-07-22 17:52:12,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-22 17:52:12,234 INFO L413 NwaCegarLoop]: 304 mSDtfsCounter, 444 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 17:52:12,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [460 Valid, 511 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 17:52:12,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-07-22 17:52:12,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 184. [2022-07-22 17:52:12,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 157 states have (on average 1.5286624203821657) internal successors, (240), 159 states have internal predecessors, (240), 20 states have call successors, (20), 7 states have call predecessors, (20), 6 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-22 17:52:12,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 278 transitions. [2022-07-22 17:52:12,308 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 278 transitions. Word has length 90 [2022-07-22 17:52:12,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 17:52:12,309 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 278 transitions. [2022-07-22 17:52:12,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 17:52:12,311 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 278 transitions. [2022-07-22 17:52:12,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-07-22 17:52:12,320 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 17:52:12,320 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 17:52:12,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 17:52:12,320 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 17:52:12,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 17:52:12,321 INFO L85 PathProgramCache]: Analyzing trace with hash -497209928, now seen corresponding path program 1 times [2022-07-22 17:52:12,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 17:52:12,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922929559] [2022-07-22 17:52:12,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:52:12,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 17:52:12,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:12,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:52:12,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:12,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 17:52:12,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:12,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-22 17:52:12,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:12,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-22 17:52:12,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:12,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-07-22 17:52:12,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:12,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 17:52:12,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 17:52:12,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922929559] [2022-07-22 17:52:12,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922929559] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 17:52:12,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 17:52:12,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 17:52:12,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936809887] [2022-07-22 17:52:12,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 17:52:12,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 17:52:12,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 17:52:12,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 17:52:12,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-22 17:52:12,462 INFO L87 Difference]: Start difference. First operand 184 states and 278 transitions. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 17:52:13,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 17:52:13,492 INFO L93 Difference]: Finished difference Result 638 states and 989 transitions. [2022-07-22 17:52:13,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 17:52:13,493 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 90 [2022-07-22 17:52:13,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 17:52:13,497 INFO L225 Difference]: With dead ends: 638 [2022-07-22 17:52:13,498 INFO L226 Difference]: Without dead ends: 466 [2022-07-22 17:52:13,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-07-22 17:52:13,501 INFO L413 NwaCegarLoop]: 320 mSDtfsCounter, 649 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 851 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 660 SdHoareTripleChecker+Valid, 798 SdHoareTripleChecker+Invalid, 943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-22 17:52:13,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [660 Valid, 798 Invalid, 943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 851 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-22 17:52:13,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2022-07-22 17:52:13,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 357. [2022-07-22 17:52:13,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 310 states have (on average 1.5419354838709678) internal successors, (478), 313 states have internal predecessors, (478), 33 states have call successors, (33), 13 states have call predecessors, (33), 13 states have return successors, (34), 31 states have call predecessors, (34), 31 states have call successors, (34) [2022-07-22 17:52:13,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 545 transitions. [2022-07-22 17:52:13,533 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 545 transitions. Word has length 90 [2022-07-22 17:52:13,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 17:52:13,533 INFO L495 AbstractCegarLoop]: Abstraction has 357 states and 545 transitions. [2022-07-22 17:52:13,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 17:52:13,534 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 545 transitions. [2022-07-22 17:52:13,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-07-22 17:52:13,535 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 17:52:13,535 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 17:52:13,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 17:52:13,536 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 17:52:13,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 17:52:13,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1743052724, now seen corresponding path program 1 times [2022-07-22 17:52:13,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 17:52:13,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798714013] [2022-07-22 17:52:13,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:52:13,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 17:52:13,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:13,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:52:13,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:13,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 17:52:13,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:13,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-22 17:52:13,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:13,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-22 17:52:13,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:13,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-07-22 17:52:13,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:13,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 17:52:13,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 17:52:13,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798714013] [2022-07-22 17:52:13,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798714013] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 17:52:13,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 17:52:13,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 17:52:13,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689220909] [2022-07-22 17:52:13,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 17:52:13,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 17:52:13,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 17:52:13,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 17:52:13,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 17:52:13,737 INFO L87 Difference]: Start difference. First operand 357 states and 545 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 17:52:14,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 17:52:14,967 INFO L93 Difference]: Finished difference Result 1041 states and 1611 transitions. [2022-07-22 17:52:14,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 17:52:14,969 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 90 [2022-07-22 17:52:14,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 17:52:14,973 INFO L225 Difference]: With dead ends: 1041 [2022-07-22 17:52:14,973 INFO L226 Difference]: Without dead ends: 696 [2022-07-22 17:52:14,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-22 17:52:14,982 INFO L413 NwaCegarLoop]: 455 mSDtfsCounter, 645 mSDsluCounter, 931 mSDsCounter, 0 mSdLazyCounter, 1324 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 656 SdHoareTripleChecker+Valid, 1386 SdHoareTripleChecker+Invalid, 1388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-22 17:52:14,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [656 Valid, 1386 Invalid, 1388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1324 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-22 17:52:14,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2022-07-22 17:52:15,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 519. [2022-07-22 17:52:15,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 452 states have (on average 1.5353982300884956) internal successors, (694), 456 states have internal predecessors, (694), 46 states have call successors, (46), 19 states have call predecessors, (46), 20 states have return successors, (49), 45 states have call predecessors, (49), 44 states have call successors, (49) [2022-07-22 17:52:15,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 789 transitions. [2022-07-22 17:52:15,039 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 789 transitions. Word has length 90 [2022-07-22 17:52:15,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 17:52:15,041 INFO L495 AbstractCegarLoop]: Abstraction has 519 states and 789 transitions. [2022-07-22 17:52:15,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 17:52:15,041 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 789 transitions. [2022-07-22 17:52:15,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-07-22 17:52:15,043 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 17:52:15,043 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 17:52:15,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 17:52:15,044 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 17:52:15,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 17:52:15,044 INFO L85 PathProgramCache]: Analyzing trace with hash -817810122, now seen corresponding path program 1 times [2022-07-22 17:52:15,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 17:52:15,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351719902] [2022-07-22 17:52:15,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:52:15,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 17:52:15,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:15,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:52:15,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:15,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 17:52:15,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:15,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-22 17:52:15,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:15,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-22 17:52:15,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:15,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-07-22 17:52:15,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:15,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 17:52:15,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 17:52:15,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351719902] [2022-07-22 17:52:15,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351719902] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 17:52:15,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 17:52:15,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 17:52:15,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269937052] [2022-07-22 17:52:15,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 17:52:15,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 17:52:15,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 17:52:15,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 17:52:15,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 17:52:15,156 INFO L87 Difference]: Start difference. First operand 519 states and 789 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 17:52:16,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 17:52:16,362 INFO L93 Difference]: Finished difference Result 1634 states and 2523 transitions. [2022-07-22 17:52:16,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 17:52:16,363 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 90 [2022-07-22 17:52:16,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 17:52:16,369 INFO L225 Difference]: With dead ends: 1634 [2022-07-22 17:52:16,370 INFO L226 Difference]: Without dead ends: 1127 [2022-07-22 17:52:16,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-22 17:52:16,373 INFO L413 NwaCegarLoop]: 332 mSDtfsCounter, 692 mSDsluCounter, 625 mSDsCounter, 0 mSdLazyCounter, 1178 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 703 SdHoareTripleChecker+Valid, 957 SdHoareTripleChecker+Invalid, 1269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-22 17:52:16,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [703 Valid, 957 Invalid, 1269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1178 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-22 17:52:16,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127 states. [2022-07-22 17:52:16,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127 to 844. [2022-07-22 17:52:16,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 737 states have (on average 1.5291723202170964) internal successors, (1127), 743 states have internal predecessors, (1127), 72 states have call successors, (72), 31 states have call predecessors, (72), 34 states have return successors, (83), 73 states have call predecessors, (83), 70 states have call successors, (83) [2022-07-22 17:52:16,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 1282 transitions. [2022-07-22 17:52:16,426 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 1282 transitions. Word has length 90 [2022-07-22 17:52:16,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 17:52:16,427 INFO L495 AbstractCegarLoop]: Abstraction has 844 states and 1282 transitions. [2022-07-22 17:52:16,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 17:52:16,427 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 1282 transitions. [2022-07-22 17:52:16,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-07-22 17:52:16,429 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 17:52:16,429 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 17:52:16,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 17:52:16,429 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 17:52:16,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 17:52:16,430 INFO L85 PathProgramCache]: Analyzing trace with hash 69412724, now seen corresponding path program 1 times [2022-07-22 17:52:16,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 17:52:16,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357064838] [2022-07-22 17:52:16,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:52:16,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 17:52:16,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:16,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:52:16,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:16,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 17:52:16,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:16,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-22 17:52:16,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:16,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-22 17:52:16,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:16,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-07-22 17:52:16,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:16,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 17:52:16,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 17:52:16,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357064838] [2022-07-22 17:52:16,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357064838] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 17:52:16,529 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 17:52:16,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 17:52:16,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434660353] [2022-07-22 17:52:16,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 17:52:16,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 17:52:16,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 17:52:16,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 17:52:16,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 17:52:16,531 INFO L87 Difference]: Start difference. First operand 844 states and 1282 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 17:52:17,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 17:52:17,667 INFO L93 Difference]: Finished difference Result 2779 states and 4280 transitions. [2022-07-22 17:52:17,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 17:52:17,667 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 90 [2022-07-22 17:52:17,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 17:52:17,678 INFO L225 Difference]: With dead ends: 2779 [2022-07-22 17:52:17,679 INFO L226 Difference]: Without dead ends: 1947 [2022-07-22 17:52:17,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-22 17:52:17,684 INFO L413 NwaCegarLoop]: 445 mSDtfsCounter, 637 mSDsluCounter, 931 mSDsCounter, 0 mSdLazyCounter, 1326 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 648 SdHoareTripleChecker+Valid, 1376 SdHoareTripleChecker+Invalid, 1392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-22 17:52:17,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [648 Valid, 1376 Invalid, 1392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1326 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-22 17:52:17,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1947 states. [2022-07-22 17:52:17,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1947 to 1495. [2022-07-22 17:52:17,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1495 states, 1308 states have (on average 1.5237003058103975) internal successors, (1993), 1318 states have internal predecessors, (1993), 124 states have call successors, (124), 55 states have call predecessors, (124), 62 states have return successors, (157), 129 states have call predecessors, (157), 122 states have call successors, (157) [2022-07-22 17:52:17,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1495 states to 1495 states and 2274 transitions. [2022-07-22 17:52:17,776 INFO L78 Accepts]: Start accepts. Automaton has 1495 states and 2274 transitions. Word has length 90 [2022-07-22 17:52:17,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 17:52:17,776 INFO L495 AbstractCegarLoop]: Abstraction has 1495 states and 2274 transitions. [2022-07-22 17:52:17,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 17:52:17,777 INFO L276 IsEmpty]: Start isEmpty. Operand 1495 states and 2274 transitions. [2022-07-22 17:52:17,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-07-22 17:52:17,779 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 17:52:17,779 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 17:52:17,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 17:52:17,780 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 17:52:17,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 17:52:17,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1841629834, now seen corresponding path program 1 times [2022-07-22 17:52:17,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 17:52:17,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023304618] [2022-07-22 17:52:17,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:52:17,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 17:52:17,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:17,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:52:17,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:17,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 17:52:17,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:17,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-22 17:52:17,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:17,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-22 17:52:17,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:17,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-07-22 17:52:17,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:17,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 17:52:17,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 17:52:17,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023304618] [2022-07-22 17:52:17,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023304618] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 17:52:17,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 17:52:17,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 17:52:17,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285403363] [2022-07-22 17:52:17,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 17:52:17,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 17:52:17,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 17:52:17,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 17:52:17,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 17:52:17,869 INFO L87 Difference]: Start difference. First operand 1495 states and 2274 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 17:52:19,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 17:52:19,171 INFO L93 Difference]: Finished difference Result 5068 states and 7810 transitions. [2022-07-22 17:52:19,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 17:52:19,171 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 90 [2022-07-22 17:52:19,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 17:52:19,189 INFO L225 Difference]: With dead ends: 5068 [2022-07-22 17:52:19,190 INFO L226 Difference]: Without dead ends: 3585 [2022-07-22 17:52:19,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-22 17:52:19,195 INFO L413 NwaCegarLoop]: 441 mSDtfsCounter, 633 mSDsluCounter, 931 mSDsCounter, 0 mSdLazyCounter, 1321 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 644 SdHoareTripleChecker+Valid, 1372 SdHoareTripleChecker+Invalid, 1387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-22 17:52:19,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [644 Valid, 1372 Invalid, 1387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1321 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-22 17:52:19,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3585 states. [2022-07-22 17:52:19,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3585 to 2802. [2022-07-22 17:52:19,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2802 states, 2455 states have (on average 1.519755600814664) internal successors, (3731), 2473 states have internal predecessors, (3731), 228 states have call successors, (228), 103 states have call predecessors, (228), 118 states have return successors, (323), 241 states have call predecessors, (323), 226 states have call successors, (323) [2022-07-22 17:52:19,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2802 states to 2802 states and 4282 transitions. [2022-07-22 17:52:19,350 INFO L78 Accepts]: Start accepts. Automaton has 2802 states and 4282 transitions. Word has length 90 [2022-07-22 17:52:19,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 17:52:19,351 INFO L495 AbstractCegarLoop]: Abstraction has 2802 states and 4282 transitions. [2022-07-22 17:52:19,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 17:52:19,351 INFO L276 IsEmpty]: Start isEmpty. Operand 2802 states and 4282 transitions. [2022-07-22 17:52:19,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-07-22 17:52:19,354 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 17:52:19,354 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 17:52:19,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 17:52:19,355 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 17:52:19,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 17:52:19,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1764729036, now seen corresponding path program 1 times [2022-07-22 17:52:19,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 17:52:19,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244956334] [2022-07-22 17:52:19,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:52:19,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 17:52:19,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:19,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:52:19,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:19,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 17:52:19,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:19,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-22 17:52:19,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:19,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-22 17:52:19,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:19,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-07-22 17:52:19,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:19,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 17:52:19,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 17:52:19,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244956334] [2022-07-22 17:52:19,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244956334] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 17:52:19,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 17:52:19,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 17:52:19,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767612558] [2022-07-22 17:52:19,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 17:52:19,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 17:52:19,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 17:52:19,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 17:52:19,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 17:52:19,437 INFO L87 Difference]: Start difference. First operand 2802 states and 4282 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 17:52:20,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 17:52:20,915 INFO L93 Difference]: Finished difference Result 10685 states and 16466 transitions. [2022-07-22 17:52:20,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 17:52:20,916 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 90 [2022-07-22 17:52:20,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 17:52:20,956 INFO L225 Difference]: With dead ends: 10685 [2022-07-22 17:52:20,956 INFO L226 Difference]: Without dead ends: 7895 [2022-07-22 17:52:20,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-07-22 17:52:20,968 INFO L413 NwaCegarLoop]: 435 mSDtfsCounter, 803 mSDsluCounter, 923 mSDsCounter, 0 mSdLazyCounter, 1309 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 819 SdHoareTripleChecker+Valid, 1358 SdHoareTripleChecker+Invalid, 1380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-22 17:52:20,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [819 Valid, 1358 Invalid, 1380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1309 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-22 17:52:20,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7895 states. [2022-07-22 17:52:21,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7895 to 5381. [2022-07-22 17:52:21,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5381 states, 4730 states have (on average 1.5207188160676532) internal successors, (7193), 4764 states have internal predecessors, (7193), 420 states have call successors, (420), 199 states have call predecessors, (420), 230 states have return successors, (693), 449 states have call predecessors, (693), 418 states have call successors, (693) [2022-07-22 17:52:21,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5381 states to 5381 states and 8306 transitions. [2022-07-22 17:52:21,345 INFO L78 Accepts]: Start accepts. Automaton has 5381 states and 8306 transitions. Word has length 90 [2022-07-22 17:52:21,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 17:52:21,346 INFO L495 AbstractCegarLoop]: Abstraction has 5381 states and 8306 transitions. [2022-07-22 17:52:21,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 17:52:21,346 INFO L276 IsEmpty]: Start isEmpty. Operand 5381 states and 8306 transitions. [2022-07-22 17:52:21,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-07-22 17:52:21,353 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 17:52:21,353 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 17:52:21,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-22 17:52:21,354 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 17:52:21,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 17:52:21,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1562887606, now seen corresponding path program 1 times [2022-07-22 17:52:21,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 17:52:21,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258972978] [2022-07-22 17:52:21,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:52:21,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 17:52:21,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:21,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:52:21,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:21,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 17:52:21,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:21,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-22 17:52:21,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:21,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-22 17:52:21,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:21,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-07-22 17:52:21,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:21,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 17:52:21,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 17:52:21,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258972978] [2022-07-22 17:52:21,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258972978] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 17:52:21,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 17:52:21,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 17:52:21,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147995805] [2022-07-22 17:52:21,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 17:52:21,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 17:52:21,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 17:52:21,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 17:52:21,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 17:52:21,461 INFO L87 Difference]: Start difference. First operand 5381 states and 8306 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 17:52:23,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 17:52:23,389 INFO L93 Difference]: Finished difference Result 20350 states and 31628 transitions. [2022-07-22 17:52:23,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 17:52:23,389 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 90 [2022-07-22 17:52:23,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 17:52:23,481 INFO L225 Difference]: With dead ends: 20350 [2022-07-22 17:52:23,482 INFO L226 Difference]: Without dead ends: 14981 [2022-07-22 17:52:23,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-07-22 17:52:23,507 INFO L413 NwaCegarLoop]: 488 mSDtfsCounter, 660 mSDsluCounter, 920 mSDsCounter, 0 mSdLazyCounter, 1489 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 670 SdHoareTripleChecker+Valid, 1408 SdHoareTripleChecker+Invalid, 1560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-22 17:52:23,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [670 Valid, 1408 Invalid, 1560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1489 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-22 17:52:23,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14981 states. [2022-07-22 17:52:24,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14981 to 10200. [2022-07-22 17:52:24,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10200 states, 8957 states have (on average 1.5128949425030702) internal successors, (13551), 9023 states have internal predecessors, (13551), 788 states have call successors, (788), 391 states have call predecessors, (788), 454 states have return successors, (1579), 849 states have call predecessors, (1579), 786 states have call successors, (1579) [2022-07-22 17:52:24,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10200 states to 10200 states and 15918 transitions. [2022-07-22 17:52:24,226 INFO L78 Accepts]: Start accepts. Automaton has 10200 states and 15918 transitions. Word has length 90 [2022-07-22 17:52:24,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 17:52:24,227 INFO L495 AbstractCegarLoop]: Abstraction has 10200 states and 15918 transitions. [2022-07-22 17:52:24,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 17:52:24,228 INFO L276 IsEmpty]: Start isEmpty. Operand 10200 states and 15918 transitions. [2022-07-22 17:52:24,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-07-22 17:52:24,239 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 17:52:24,239 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 17:52:24,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-22 17:52:24,240 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 17:52:24,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 17:52:24,240 INFO L85 PathProgramCache]: Analyzing trace with hash -823621900, now seen corresponding path program 1 times [2022-07-22 17:52:24,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 17:52:24,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489504240] [2022-07-22 17:52:24,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:52:24,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 17:52:24,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:24,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:52:24,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:24,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 17:52:24,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:24,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-22 17:52:24,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:24,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-22 17:52:24,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:24,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-07-22 17:52:24,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:24,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 17:52:24,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 17:52:24,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489504240] [2022-07-22 17:52:24,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489504240] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 17:52:24,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 17:52:24,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 17:52:24,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265266639] [2022-07-22 17:52:24,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 17:52:24,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 17:52:24,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 17:52:24,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 17:52:24,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 17:52:24,335 INFO L87 Difference]: Start difference. First operand 10200 states and 15918 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 17:52:26,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 17:52:26,419 INFO L93 Difference]: Finished difference Result 37168 states and 58490 transitions. [2022-07-22 17:52:26,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 17:52:26,419 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 90 [2022-07-22 17:52:26,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 17:52:26,547 INFO L225 Difference]: With dead ends: 37168 [2022-07-22 17:52:26,548 INFO L226 Difference]: Without dead ends: 26980 [2022-07-22 17:52:26,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-07-22 17:52:26,591 INFO L413 NwaCegarLoop]: 421 mSDtfsCounter, 680 mSDsluCounter, 923 mSDsCounter, 0 mSdLazyCounter, 1281 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 696 SdHoareTripleChecker+Valid, 1344 SdHoareTripleChecker+Invalid, 1356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-22 17:52:26,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [696 Valid, 1344 Invalid, 1356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1281 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-22 17:52:26,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26980 states. [2022-07-22 17:52:27,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26980 to 20188. [2022-07-22 17:52:27,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20188 states, 17793 states have (on average 1.5173944809756645) internal successors, (26999), 17923 states have internal predecessors, (26999), 1492 states have call successors, (1492), 775 states have call predecessors, (1492), 902 states have return successors, (3805), 1617 states have call predecessors, (3805), 1490 states have call successors, (3805) [2022-07-22 17:52:27,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20188 states to 20188 states and 32296 transitions. [2022-07-22 17:52:27,979 INFO L78 Accepts]: Start accepts. Automaton has 20188 states and 32296 transitions. Word has length 90 [2022-07-22 17:52:27,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 17:52:27,979 INFO L495 AbstractCegarLoop]: Abstraction has 20188 states and 32296 transitions. [2022-07-22 17:52:27,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 17:52:27,980 INFO L276 IsEmpty]: Start isEmpty. Operand 20188 states and 32296 transitions. [2022-07-22 17:52:27,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-07-22 17:52:27,999 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 17:52:28,000 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 17:52:28,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-22 17:52:28,000 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 17:52:28,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 17:52:28,001 INFO L85 PathProgramCache]: Analyzing trace with hash 130318258, now seen corresponding path program 1 times [2022-07-22 17:52:28,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 17:52:28,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563888349] [2022-07-22 17:52:28,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:52:28,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 17:52:28,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:28,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:52:28,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:28,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 17:52:28,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:28,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-22 17:52:28,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:28,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-22 17:52:28,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:28,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-07-22 17:52:28,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:28,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 17:52:28,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 17:52:28,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563888349] [2022-07-22 17:52:28,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563888349] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 17:52:28,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 17:52:28,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 17:52:28,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965094387] [2022-07-22 17:52:28,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 17:52:28,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 17:52:28,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 17:52:28,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 17:52:28,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 17:52:28,093 INFO L87 Difference]: Start difference. First operand 20188 states and 32296 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 17:52:31,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 17:52:31,157 INFO L93 Difference]: Finished difference Result 71542 states and 115470 transitions. [2022-07-22 17:52:31,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 17:52:31,158 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 90 [2022-07-22 17:52:31,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 17:52:31,473 INFO L225 Difference]: With dead ends: 71542 [2022-07-22 17:52:31,474 INFO L226 Difference]: Without dead ends: 51366 [2022-07-22 17:52:31,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-07-22 17:52:31,554 INFO L413 NwaCegarLoop]: 429 mSDtfsCounter, 625 mSDsluCounter, 923 mSDsCounter, 0 mSdLazyCounter, 1354 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 635 SdHoareTripleChecker+Valid, 1352 SdHoareTripleChecker+Invalid, 1424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-22 17:52:31,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [635 Valid, 1352 Invalid, 1424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1354 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-22 17:52:31,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51366 states. [2022-07-22 17:52:33,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51366 to 40097. [2022-07-22 17:52:33,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40097 states, 35462 states have (on average 1.5214313913484856) internal successors, (53953), 35720 states have internal predecessors, (53953), 2836 states have call successors, (2836), 1543 states have call predecessors, (2836), 1798 states have return successors, (9651), 3089 states have call predecessors, (9651), 2834 states have call successors, (9651) [2022-07-22 17:52:34,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40097 states to 40097 states and 66440 transitions. [2022-07-22 17:52:34,193 INFO L78 Accepts]: Start accepts. Automaton has 40097 states and 66440 transitions. Word has length 90 [2022-07-22 17:52:34,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 17:52:34,193 INFO L495 AbstractCegarLoop]: Abstraction has 40097 states and 66440 transitions. [2022-07-22 17:52:34,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 17:52:34,194 INFO L276 IsEmpty]: Start isEmpty. Operand 40097 states and 66440 transitions. [2022-07-22 17:52:34,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-07-22 17:52:34,226 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 17:52:34,226 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 17:52:34,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-22 17:52:34,227 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 17:52:34,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 17:52:34,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1085835468, now seen corresponding path program 1 times [2022-07-22 17:52:34,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 17:52:34,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888530104] [2022-07-22 17:52:34,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:52:34,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 17:52:34,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:34,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:52:34,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:34,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 17:52:34,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:34,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-22 17:52:34,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:34,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-22 17:52:34,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:34,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-07-22 17:52:34,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:34,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 17:52:34,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 17:52:34,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888530104] [2022-07-22 17:52:34,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888530104] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 17:52:34,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 17:52:34,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 17:52:34,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72396349] [2022-07-22 17:52:34,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 17:52:34,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 17:52:34,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 17:52:34,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 17:52:34,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-22 17:52:34,330 INFO L87 Difference]: Start difference. First operand 40097 states and 66440 transitions. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 17:52:38,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 17:52:38,872 INFO L93 Difference]: Finished difference Result 113501 states and 185325 transitions. [2022-07-22 17:52:38,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 17:52:38,873 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 90 [2022-07-22 17:52:38,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 17:52:39,369 INFO L225 Difference]: With dead ends: 113501 [2022-07-22 17:52:39,370 INFO L226 Difference]: Without dead ends: 73417 [2022-07-22 17:52:39,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-07-22 17:52:39,490 INFO L413 NwaCegarLoop]: 529 mSDtfsCounter, 831 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 1021 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 860 SdHoareTripleChecker+Valid, 1094 SdHoareTripleChecker+Invalid, 1118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-22 17:52:39,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [860 Valid, 1094 Invalid, 1118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1021 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-22 17:52:39,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73417 states. [2022-07-22 17:52:42,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73417 to 59620. [2022-07-22 17:52:42,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59620 states, 52597 states have (on average 1.506892028062437) internal successors, (79258), 53112 states have internal predecessors, (79258), 4322 states have call successors, (4322), 2317 states have call predecessors, (4322), 2700 states have return successors, (13325), 4446 states have call predecessors, (13325), 4320 states have call successors, (13325) [2022-07-22 17:52:42,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59620 states to 59620 states and 96905 transitions. [2022-07-22 17:52:42,993 INFO L78 Accepts]: Start accepts. Automaton has 59620 states and 96905 transitions. Word has length 90 [2022-07-22 17:52:42,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 17:52:42,994 INFO L495 AbstractCegarLoop]: Abstraction has 59620 states and 96905 transitions. [2022-07-22 17:52:42,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 17:52:42,994 INFO L276 IsEmpty]: Start isEmpty. Operand 59620 states and 96905 transitions. [2022-07-22 17:52:43,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-07-22 17:52:43,439 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 17:52:43,439 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 17:52:43,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-22 17:52:43,440 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 17:52:43,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 17:52:43,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1103843070, now seen corresponding path program 1 times [2022-07-22 17:52:43,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 17:52:43,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536328865] [2022-07-22 17:52:43,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:52:43,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 17:52:43,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:43,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:52:43,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:43,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 17:52:43,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:43,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-22 17:52:43,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:43,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-22 17:52:43,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:43,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-07-22 17:52:43,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:43,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-07-22 17:52:43,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:43,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-22 17:52:43,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:43,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-07-22 17:52:43,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:43,571 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 17:52:43,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 17:52:43,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536328865] [2022-07-22 17:52:43,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536328865] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 17:52:43,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623200250] [2022-07-22 17:52:43,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:52:43,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 17:52:43,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 17:52:43,579 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) [2022-07-22 17:52:43,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 17:52:43,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:43,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 17:52:43,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 17:52:43,833 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-22 17:52:43,833 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 17:52:43,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623200250] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 17:52:43,833 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 17:52:43,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2022-07-22 17:52:43,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995175851] [2022-07-22 17:52:43,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 17:52:43,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 17:52:43,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 17:52:43,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 17:52:43,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-22 17:52:43,836 INFO L87 Difference]: Start difference. First operand 59620 states and 96905 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-22 17:52:48,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 17:52:48,447 INFO L93 Difference]: Finished difference Result 177479 states and 290291 transitions. [2022-07-22 17:52:48,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 17:52:48,448 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 146 [2022-07-22 17:52:48,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 17:52:48,959 INFO L225 Difference]: With dead ends: 177479 [2022-07-22 17:52:48,959 INFO L226 Difference]: Without dead ends: 117872 [2022-07-22 17:52:49,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-22 17:52:49,087 INFO L413 NwaCegarLoop]: 287 mSDtfsCounter, 222 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 17:52:49,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 536 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 17:52:49,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117872 states. [2022-07-22 17:52:54,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117872 to 117096. [2022-07-22 17:52:54,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117096 states, 103251 states have (on average 1.5051767053103602) internal successors, (155411), 104279 states have internal predecessors, (155411), 8444 states have call successors, (8444), 4633 states have call predecessors, (8444), 5400 states have return successors, (26197), 8439 states have call predecessors, (26197), 8442 states have call successors, (26197) [2022-07-22 17:52:54,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117096 states to 117096 states and 190052 transitions. [2022-07-22 17:52:54,889 INFO L78 Accepts]: Start accepts. Automaton has 117096 states and 190052 transitions. Word has length 146 [2022-07-22 17:52:54,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 17:52:54,889 INFO L495 AbstractCegarLoop]: Abstraction has 117096 states and 190052 transitions. [2022-07-22 17:52:54,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-22 17:52:54,889 INFO L276 IsEmpty]: Start isEmpty. Operand 117096 states and 190052 transitions. [2022-07-22 17:52:55,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-07-22 17:52:55,420 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 17:52:55,420 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 17:52:55,445 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-22 17:52:55,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-22 17:52:55,642 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 17:52:55,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 17:52:55,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1226046174, now seen corresponding path program 1 times [2022-07-22 17:52:55,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 17:52:55,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566794467] [2022-07-22 17:52:55,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:52:55,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 17:52:55,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:55,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:52:55,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:55,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 17:52:55,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:55,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-22 17:52:55,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:55,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-22 17:52:55,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:55,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-07-22 17:52:55,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:55,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-07-22 17:52:55,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:55,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-22 17:52:55,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:55,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-07-22 17:52:55,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:55,746 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 17:52:55,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 17:52:55,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566794467] [2022-07-22 17:52:55,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566794467] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 17:52:55,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490292754] [2022-07-22 17:52:55,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:52:55,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 17:52:55,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 17:52:55,749 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) [2022-07-22 17:52:55,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 17:52:55,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:52:55,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 17:52:55,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 17:52:55,947 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-22 17:52:55,951 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 17:52:55,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490292754] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 17:52:55,951 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 17:52:55,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2022-07-22 17:52:55,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906292523] [2022-07-22 17:52:55,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 17:52:55,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 17:52:55,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 17:52:55,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 17:52:55,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-22 17:52:55,953 INFO L87 Difference]: Start difference. First operand 117096 states and 190052 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-22 17:53:05,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 17:53:05,025 INFO L93 Difference]: Finished difference Result 348553 states and 569410 transitions. [2022-07-22 17:53:05,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 17:53:05,026 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 146 [2022-07-22 17:53:05,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 17:53:06,334 INFO L225 Difference]: With dead ends: 348553 [2022-07-22 17:53:06,335 INFO L226 Difference]: Without dead ends: 231470 [2022-07-22 17:53:06,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-22 17:53:06,602 INFO L413 NwaCegarLoop]: 287 mSDtfsCounter, 228 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 17:53:06,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 536 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 17:53:06,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231470 states.