./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.12.cil-1.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/combinations/pc_sfifo_1.cil-2+token_ring.12.cil-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 67128d109acca52d0fda3c2f0434d60ee9cc5cc865496b6446183c0a601e748c --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 20:44:59,470 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 20:44:59,497 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 20:44:59,540 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 20:44:59,541 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 20:44:59,542 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 20:44:59,544 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 20:44:59,546 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 20:44:59,548 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 20:44:59,552 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 20:44:59,553 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 20:44:59,555 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 20:44:59,555 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 20:44:59,557 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 20:44:59,558 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 20:44:59,561 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 20:44:59,562 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 20:44:59,563 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 20:44:59,565 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 20:44:59,570 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 20:44:59,572 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 20:44:59,573 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 20:44:59,573 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 20:44:59,574 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 20:44:59,576 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 20:44:59,582 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 20:44:59,582 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 20:44:59,582 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 20:44:59,583 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 20:44:59,584 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 20:44:59,585 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 20:44:59,585 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 20:44:59,586 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 20:44:59,587 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 20:44:59,588 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 20:44:59,588 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 20:44:59,589 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 20:44:59,590 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 20:44:59,590 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 20:44:59,591 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 20:44:59,591 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 20:44:59,593 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 20:44:59,594 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 20:44:59,623 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 20:44:59,624 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 20:44:59,624 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 20:44:59,625 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 20:44:59,625 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 20:44:59,625 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 20:44:59,626 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 20:44:59,626 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 20:44:59,626 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 20:44:59,627 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 20:44:59,627 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 20:44:59,628 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 20:44:59,628 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 20:44:59,628 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 20:44:59,628 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 20:44:59,628 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 20:44:59,629 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 20:44:59,629 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 20:44:59,629 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 20:44:59,629 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 20:44:59,630 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 20:44:59,630 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 20:44:59,631 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 20:44:59,631 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 20:44:59,631 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 20:44:59,631 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 20:44:59,631 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 20:44:59,632 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 20:44:59,632 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 20:44:59,632 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 20:44:59,632 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 20:44:59,632 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 20:44:59,633 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 20:44:59,633 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 67128d109acca52d0fda3c2f0434d60ee9cc5cc865496b6446183c0a601e748c [2022-07-22 20:44:59,893 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 20:44:59,915 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 20:44:59,917 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 20:44:59,918 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 20:44:59,919 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 20:44:59,920 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.12.cil-1.c [2022-07-22 20:44:59,972 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89f1d4130/aad8066859484acca3292c6f07b948e6/FLAG66aaf17a2 [2022-07-22 20:45:00,387 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 20:45:00,388 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.12.cil-1.c [2022-07-22 20:45:00,410 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89f1d4130/aad8066859484acca3292c6f07b948e6/FLAG66aaf17a2 [2022-07-22 20:45:00,754 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89f1d4130/aad8066859484acca3292c6f07b948e6 [2022-07-22 20:45:00,756 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 20:45:00,757 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 20:45:00,760 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 20:45:00,760 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 20:45:00,763 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 20:45:00,763 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 08:45:00" (1/1) ... [2022-07-22 20:45:00,764 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@495a5a9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:45:00, skipping insertion in model container [2022-07-22 20:45:00,764 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 08:45:00" (1/1) ... [2022-07-22 20:45:00,770 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 20:45:00,816 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 20:45:00,952 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/combinations/pc_sfifo_1.cil-2+token_ring.12.cil-1.c[913,926] [2022-07-22 20:45:00,992 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/combinations/pc_sfifo_1.cil-2+token_ring.12.cil-1.c[5977,5990] [2022-07-22 20:45:01,070 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 20:45:01,079 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 20:45:01,088 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/combinations/pc_sfifo_1.cil-2+token_ring.12.cil-1.c[913,926] [2022-07-22 20:45:01,099 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/combinations/pc_sfifo_1.cil-2+token_ring.12.cil-1.c[5977,5990] [2022-07-22 20:45:01,164 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 20:45:01,186 INFO L208 MainTranslator]: Completed translation [2022-07-22 20:45:01,186 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:45:01 WrapperNode [2022-07-22 20:45:01,187 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 20:45:01,188 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 20:45:01,188 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 20:45:01,188 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 20:45:01,194 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:45:01" (1/1) ... [2022-07-22 20:45:01,207 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:45:01" (1/1) ... [2022-07-22 20:45:01,250 INFO L137 Inliner]: procedures = 72, calls = 85, calls flagged for inlining = 46, calls inlined = 46, statements flattened = 1060 [2022-07-22 20:45:01,250 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 20:45:01,258 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 20:45:01,259 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 20:45:01,259 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 20:45:01,264 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:45:01" (1/1) ... [2022-07-22 20:45:01,264 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:45:01" (1/1) ... [2022-07-22 20:45:01,269 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:45:01" (1/1) ... [2022-07-22 20:45:01,269 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:45:01" (1/1) ... [2022-07-22 20:45:01,296 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:45:01" (1/1) ... [2022-07-22 20:45:01,325 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:45:01" (1/1) ... [2022-07-22 20:45:01,330 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:45:01" (1/1) ... [2022-07-22 20:45:01,335 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 20:45:01,336 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 20:45:01,336 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 20:45:01,336 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 20:45:01,345 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:45:01" (1/1) ... [2022-07-22 20:45:01,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 20:45:01,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 20:45:01,376 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 20:45:01,393 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 20:45:01,420 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 20:45:01,420 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-07-22 20:45:01,420 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-07-22 20:45:01,421 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2022-07-22 20:45:01,421 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2022-07-22 20:45:01,421 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-07-22 20:45:01,421 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-07-22 20:45:01,421 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-07-22 20:45:01,421 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-07-22 20:45:01,421 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-07-22 20:45:01,421 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-07-22 20:45:01,421 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-07-22 20:45:01,422 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-07-22 20:45:01,422 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-07-22 20:45:01,422 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-07-22 20:45:01,422 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 20:45:01,422 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-07-22 20:45:01,422 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-07-22 20:45:01,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 20:45:01,422 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 20:45:01,422 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-07-22 20:45:01,422 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-07-22 20:45:01,422 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2022-07-22 20:45:01,423 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2022-07-22 20:45:01,582 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 20:45:01,583 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 20:45:02,339 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 20:45:02,357 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 20:45:02,357 INFO L299 CfgBuilder]: Removed 19 assume(true) statements. [2022-07-22 20:45:02,360 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 08:45:02 BoogieIcfgContainer [2022-07-22 20:45:02,360 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 20:45:02,362 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 20:45:02,362 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 20:45:02,365 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 20:45:02,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 08:45:00" (1/3) ... [2022-07-22 20:45:02,367 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28c2e090 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 08:45:02, skipping insertion in model container [2022-07-22 20:45:02,367 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:45:01" (2/3) ... [2022-07-22 20:45:02,367 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28c2e090 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 08:45:02, skipping insertion in model container [2022-07-22 20:45:02,367 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 08:45:02" (3/3) ... [2022-07-22 20:45:02,369 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.12.cil-1.c [2022-07-22 20:45:02,380 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 20:45:02,381 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-22 20:45:02,448 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 20:45:02,454 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@a9132f4, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@27709f12 [2022-07-22 20:45:02,454 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-22 20:45:02,460 INFO L276 IsEmpty]: Start isEmpty. Operand has 462 states, 415 states have (on average 1.653012048192771) internal successors, (686), 422 states have internal predecessors, (686), 34 states have call successors, (34), 10 states have call predecessors, (34), 10 states have return successors, (34), 32 states have call predecessors, (34), 34 states have call successors, (34) [2022-07-22 20:45:02,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-22 20:45:02,470 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:45:02,470 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] [2022-07-22 20:45:02,471 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:45:02,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:45:02,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1035123780, now seen corresponding path program 1 times [2022-07-22 20:45:02,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:45:02,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149079642] [2022-07-22 20:45:02,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:45:02,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:45:02,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:02,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 20:45:02,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:02,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-22 20:45:02,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:02,774 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 20:45:02,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:45:02,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149079642] [2022-07-22 20:45:02,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149079642] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:45:02,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:45:02,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 20:45:02,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431205859] [2022-07-22 20:45:02,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:45:02,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 20:45:02,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:45:02,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 20:45:02,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 20:45:02,817 INFO L87 Difference]: Start difference. First operand has 462 states, 415 states have (on average 1.653012048192771) internal successors, (686), 422 states have internal predecessors, (686), 34 states have call successors, (34), 10 states have call predecessors, (34), 10 states have return successors, (34), 32 states have call predecessors, (34), 34 states have call successors, (34) Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 20:45:03,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:45:03,144 INFO L93 Difference]: Finished difference Result 968 states and 1576 transitions. [2022-07-22 20:45:03,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 20:45:03,147 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2022-07-22 20:45:03,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:45:03,167 INFO L225 Difference]: With dead ends: 968 [2022-07-22 20:45:03,167 INFO L226 Difference]: Without dead ends: 521 [2022-07-22 20:45:03,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 20:45:03,182 INFO L413 NwaCegarLoop]: 717 mSDtfsCounter, 957 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 983 SdHoareTripleChecker+Valid, 1141 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 20:45:03,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [983 Valid, 1141 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 20:45:03,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2022-07-22 20:45:03,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 515. [2022-07-22 20:45:03,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 464 states have (on average 1.5366379310344827) internal successors, (713), 469 states have internal predecessors, (713), 38 states have call successors, (38), 12 states have call predecessors, (38), 11 states have return successors, (40), 34 states have call predecessors, (40), 34 states have call successors, (40) [2022-07-22 20:45:03,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 791 transitions. [2022-07-22 20:45:03,268 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 791 transitions. Word has length 44 [2022-07-22 20:45:03,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:45:03,269 INFO L495 AbstractCegarLoop]: Abstraction has 515 states and 791 transitions. [2022-07-22 20:45:03,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 20:45:03,269 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 791 transitions. [2022-07-22 20:45:03,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-22 20:45:03,272 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:45:03,272 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] [2022-07-22 20:45:03,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 20:45:03,273 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:45:03,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:45:03,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1381906941, now seen corresponding path program 1 times [2022-07-22 20:45:03,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:45:03,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135166750] [2022-07-22 20:45:03,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:45:03,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:45:03,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:03,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 20:45:03,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:03,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-22 20:45:03,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:03,329 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 20:45:03,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:45:03,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135166750] [2022-07-22 20:45:03,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135166750] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:45:03,330 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:45:03,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 20:45:03,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653824862] [2022-07-22 20:45:03,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:45:03,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 20:45:03,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:45:03,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 20:45:03,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 20:45:03,333 INFO L87 Difference]: Start difference. First operand 515 states and 791 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 20:45:03,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:45:03,818 INFO L93 Difference]: Finished difference Result 763 states and 1131 transitions. [2022-07-22 20:45:03,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 20:45:03,818 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2022-07-22 20:45:03,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:45:03,822 INFO L225 Difference]: With dead ends: 763 [2022-07-22 20:45:03,822 INFO L226 Difference]: Without dead ends: 639 [2022-07-22 20:45:03,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 20:45:03,824 INFO L413 NwaCegarLoop]: 746 mSDtfsCounter, 369 mSDsluCounter, 734 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 1480 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 20:45:03,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [371 Valid, 1480 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 20:45:03,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2022-07-22 20:45:03,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 582. [2022-07-22 20:45:03,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 525 states have (on average 1.5180952380952382) internal successors, (797), 530 states have internal predecessors, (797), 41 states have call successors, (41), 15 states have call predecessors, (41), 14 states have return successors, (43), 37 states have call predecessors, (43), 37 states have call successors, (43) [2022-07-22 20:45:03,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 881 transitions. [2022-07-22 20:45:03,852 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 881 transitions. Word has length 45 [2022-07-22 20:45:03,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:45:03,852 INFO L495 AbstractCegarLoop]: Abstraction has 582 states and 881 transitions. [2022-07-22 20:45:03,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 20:45:03,853 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 881 transitions. [2022-07-22 20:45:03,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-22 20:45:03,855 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:45:03,855 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] [2022-07-22 20:45:03,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 20:45:03,855 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:45:03,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:45:03,856 INFO L85 PathProgramCache]: Analyzing trace with hash 97549480, now seen corresponding path program 1 times [2022-07-22 20:45:03,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:45:03,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098303396] [2022-07-22 20:45:03,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:45:03,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:45:03,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:03,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 20:45:03,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:03,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-22 20:45:03,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:03,902 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 20:45:03,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:45:03,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098303396] [2022-07-22 20:45:03,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098303396] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:45:03,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:45:03,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 20:45:03,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545819638] [2022-07-22 20:45:03,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:45:03,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 20:45:03,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:45:03,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 20:45:03,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 20:45:03,904 INFO L87 Difference]: Start difference. First operand 582 states and 881 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 20:45:04,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:45:04,087 INFO L93 Difference]: Finished difference Result 990 states and 1440 transitions. [2022-07-22 20:45:04,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 20:45:04,088 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2022-07-22 20:45:04,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:45:04,093 INFO L225 Difference]: With dead ends: 990 [2022-07-22 20:45:04,093 INFO L226 Difference]: Without dead ends: 799 [2022-07-22 20:45:04,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 20:45:04,100 INFO L413 NwaCegarLoop]: 721 mSDtfsCounter, 966 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 992 SdHoareTripleChecker+Valid, 1143 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 20:45:04,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [992 Valid, 1143 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 20:45:04,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2022-07-22 20:45:04,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 747. [2022-07-22 20:45:04,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 747 states, 671 states have (on average 1.4709388971684054) internal successors, (987), 679 states have internal predecessors, (987), 52 states have call successors, (52), 22 states have call predecessors, (52), 22 states have return successors, (60), 46 states have call predecessors, (60), 48 states have call successors, (60) [2022-07-22 20:45:04,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 1099 transitions. [2022-07-22 20:45:04,158 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 1099 transitions. Word has length 45 [2022-07-22 20:45:04,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:45:04,158 INFO L495 AbstractCegarLoop]: Abstraction has 747 states and 1099 transitions. [2022-07-22 20:45:04,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 20:45:04,159 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 1099 transitions. [2022-07-22 20:45:04,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-22 20:45:04,162 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:45:04,162 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-22 20:45:04,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 20:45:04,163 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:45:04,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:45:04,163 INFO L85 PathProgramCache]: Analyzing trace with hash -438152140, now seen corresponding path program 1 times [2022-07-22 20:45:04,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:45:04,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988317194] [2022-07-22 20:45:04,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:45:04,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:45:04,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:04,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 20:45:04,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:04,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-22 20:45:04,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:04,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-22 20:45:04,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:04,240 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 20:45:04,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:45:04,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988317194] [2022-07-22 20:45:04,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988317194] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:45:04,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:45:04,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 20:45:04,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943205584] [2022-07-22 20:45:04,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:45:04,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 20:45:04,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:45:04,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 20:45:04,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 20:45:04,244 INFO L87 Difference]: Start difference. First operand 747 states and 1099 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 20:45:04,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:45:04,675 INFO L93 Difference]: Finished difference Result 1331 states and 1884 transitions. [2022-07-22 20:45:04,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 20:45:04,675 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 62 [2022-07-22 20:45:04,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:45:04,680 INFO L225 Difference]: With dead ends: 1331 [2022-07-22 20:45:04,680 INFO L226 Difference]: Without dead ends: 975 [2022-07-22 20:45:04,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 20:45:04,682 INFO L413 NwaCegarLoop]: 770 mSDtfsCounter, 353 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 1535 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 20:45:04,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [355 Valid, 1535 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 20:45:04,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2022-07-22 20:45:04,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 937. [2022-07-22 20:45:04,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 937 states, 837 states have (on average 1.4181600955794504) internal successors, (1187), 847 states have internal predecessors, (1187), 66 states have call successors, (66), 30 states have call predecessors, (66), 32 states have return successors, (84), 60 states have call predecessors, (84), 62 states have call successors, (84) [2022-07-22 20:45:04,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 1337 transitions. [2022-07-22 20:45:04,718 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 1337 transitions. Word has length 62 [2022-07-22 20:45:04,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:45:04,719 INFO L495 AbstractCegarLoop]: Abstraction has 937 states and 1337 transitions. [2022-07-22 20:45:04,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 20:45:04,719 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 1337 transitions. [2022-07-22 20:45:04,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-22 20:45:04,722 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:45:04,722 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-22 20:45:04,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 20:45:04,722 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:45:04,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:45:04,723 INFO L85 PathProgramCache]: Analyzing trace with hash -865322860, now seen corresponding path program 1 times [2022-07-22 20:45:04,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:45:04,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722875601] [2022-07-22 20:45:04,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:45:04,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:45:04,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:04,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 20:45:04,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:04,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 20:45:04,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:04,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-22 20:45:04,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:04,778 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-22 20:45:04,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:45:04,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722875601] [2022-07-22 20:45:04,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722875601] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:45:04,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:45:04,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 20:45:04,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897489587] [2022-07-22 20:45:04,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:45:04,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 20:45:04,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:45:04,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 20:45:04,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 20:45:04,781 INFO L87 Difference]: Start difference. First operand 937 states and 1337 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 20:45:04,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:45:04,940 INFO L93 Difference]: Finished difference Result 1590 states and 2190 transitions. [2022-07-22 20:45:04,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 20:45:04,940 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2022-07-22 20:45:04,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:45:04,946 INFO L225 Difference]: With dead ends: 1590 [2022-07-22 20:45:04,946 INFO L226 Difference]: Without dead ends: 1136 [2022-07-22 20:45:04,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 20:45:04,948 INFO L413 NwaCegarLoop]: 716 mSDtfsCounter, 953 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 979 SdHoareTripleChecker+Valid, 1140 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 20:45:04,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [979 Valid, 1140 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 20:45:04,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2022-07-22 20:45:04,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 1081. [2022-07-22 20:45:04,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1081 states, 965 states have (on average 1.3865284974093264) internal successors, (1338), 977 states have internal predecessors, (1338), 74 states have call successors, (74), 36 states have call predecessors, (74), 40 states have return successors, (98), 68 states have call predecessors, (98), 70 states have call successors, (98) [2022-07-22 20:45:04,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1081 states to 1081 states and 1510 transitions. [2022-07-22 20:45:04,988 INFO L78 Accepts]: Start accepts. Automaton has 1081 states and 1510 transitions. Word has length 67 [2022-07-22 20:45:04,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:45:04,989 INFO L495 AbstractCegarLoop]: Abstraction has 1081 states and 1510 transitions. [2022-07-22 20:45:04,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 20:45:04,989 INFO L276 IsEmpty]: Start isEmpty. Operand 1081 states and 1510 transitions. [2022-07-22 20:45:04,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-22 20:45:04,991 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:45:04,991 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-22 20:45:04,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 20:45:04,992 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:45:04,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:45:04,992 INFO L85 PathProgramCache]: Analyzing trace with hash 679042809, now seen corresponding path program 1 times [2022-07-22 20:45:04,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:45:04,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967880210] [2022-07-22 20:45:04,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:45:04,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:45:05,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:05,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 20:45:05,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:05,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 20:45:05,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:05,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-22 20:45:05,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:05,074 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 20:45:05,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:45:05,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967880210] [2022-07-22 20:45:05,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967880210] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 20:45:05,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109825144] [2022-07-22 20:45:05,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:45:05,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 20:45:05,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 20:45:05,079 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 20:45:05,095 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 20:45:05,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:05,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 20:45:05,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 20:45:05,315 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:45:05,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 20:45:05,349 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-22 20:45:05,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109825144] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 20:45:05,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 20:45:05,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 8 [2022-07-22 20:45:05,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50680546] [2022-07-22 20:45:05,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:45:05,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 20:45:05,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:45:05,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 20:45:05,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-22 20:45:05,352 INFO L87 Difference]: Start difference. First operand 1081 states and 1510 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 20:45:05,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:45:05,521 INFO L93 Difference]: Finished difference Result 1137 states and 1578 transitions. [2022-07-22 20:45:05,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 20:45:05,521 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 68 [2022-07-22 20:45:05,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:45:05,526 INFO L225 Difference]: With dead ends: 1137 [2022-07-22 20:45:05,527 INFO L226 Difference]: Without dead ends: 1134 [2022-07-22 20:45:05,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-22 20:45:05,528 INFO L413 NwaCegarLoop]: 725 mSDtfsCounter, 1279 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1279 SdHoareTripleChecker+Valid, 792 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 20:45:05,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1279 Valid, 792 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 20:45:05,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1134 states. [2022-07-22 20:45:05,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1134 to 1080. [2022-07-22 20:45:05,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1080 states, 965 states have (on average 1.3844559585492229) internal successors, (1336), 976 states have internal predecessors, (1336), 73 states have call successors, (73), 36 states have call predecessors, (73), 40 states have return successors, (98), 68 states have call predecessors, (98), 70 states have call successors, (98) [2022-07-22 20:45:05,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 1507 transitions. [2022-07-22 20:45:05,570 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 1507 transitions. Word has length 68 [2022-07-22 20:45:05,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:45:05,570 INFO L495 AbstractCegarLoop]: Abstraction has 1080 states and 1507 transitions. [2022-07-22 20:45:05,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 20:45:05,571 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 1507 transitions. [2022-07-22 20:45:05,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-22 20:45:05,573 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:45:05,573 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-22 20:45:05,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 20:45:05,797 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,SelfDestructingSolverStorable5 [2022-07-22 20:45:05,797 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:45:05,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:45:05,798 INFO L85 PathProgramCache]: Analyzing trace with hash -425930313, now seen corresponding path program 1 times [2022-07-22 20:45:05,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:45:05,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434605766] [2022-07-22 20:45:05,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:45:05,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:45:05,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:05,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 20:45:05,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:05,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 20:45:05,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:05,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-22 20:45:05,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:05,872 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 20:45:05,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:45:05,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434605766] [2022-07-22 20:45:05,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434605766] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 20:45:05,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271244014] [2022-07-22 20:45:05,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:45:05,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 20:45:05,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 20:45:05,874 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 20:45:05,880 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 20:45:05,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:05,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-22 20:45:05,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 20:45:06,273 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:45:06,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 20:45:06,340 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-22 20:45:06,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271244014] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 20:45:06,340 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 20:45:06,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 11 [2022-07-22 20:45:06,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497412776] [2022-07-22 20:45:06,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 20:45:06,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-22 20:45:06,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:45:06,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-22 20:45:06,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-07-22 20:45:06,343 INFO L87 Difference]: Start difference. First operand 1080 states and 1507 transitions. Second operand has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-07-22 20:45:08,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:45:08,081 INFO L93 Difference]: Finished difference Result 2780 states and 3727 transitions. [2022-07-22 20:45:08,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-22 20:45:08,082 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 69 [2022-07-22 20:45:08,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:45:08,091 INFO L225 Difference]: With dead ends: 2780 [2022-07-22 20:45:08,091 INFO L226 Difference]: Without dead ends: 2236 [2022-07-22 20:45:08,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=324, Invalid=1482, Unknown=0, NotChecked=0, Total=1806 [2022-07-22 20:45:08,094 INFO L413 NwaCegarLoop]: 830 mSDtfsCounter, 1278 mSDsluCounter, 3520 mSDsCounter, 0 mSdLazyCounter, 2366 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1311 SdHoareTripleChecker+Valid, 4350 SdHoareTripleChecker+Invalid, 2413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 2366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-22 20:45:08,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1311 Valid, 4350 Invalid, 2413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 2366 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-22 20:45:08,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2236 states. [2022-07-22 20:45:08,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2236 to 1469. [2022-07-22 20:45:08,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1469 states, 1315 states have (on average 1.3460076045627376) internal successors, (1770), 1334 states have internal predecessors, (1770), 93 states have call successors, (93), 50 states have call predecessors, (93), 59 states have return successors, (132), 85 states have call predecessors, (132), 90 states have call successors, (132) [2022-07-22 20:45:08,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1469 states to 1469 states and 1995 transitions. [2022-07-22 20:45:08,193 INFO L78 Accepts]: Start accepts. Automaton has 1469 states and 1995 transitions. Word has length 69 [2022-07-22 20:45:08,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:45:08,193 INFO L495 AbstractCegarLoop]: Abstraction has 1469 states and 1995 transitions. [2022-07-22 20:45:08,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-07-22 20:45:08,194 INFO L276 IsEmpty]: Start isEmpty. Operand 1469 states and 1995 transitions. [2022-07-22 20:45:08,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-07-22 20:45:08,197 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:45:08,197 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-22 20:45:08,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 20:45:08,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-07-22 20:45:08,416 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:45:08,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:45:08,416 INFO L85 PathProgramCache]: Analyzing trace with hash -711580662, now seen corresponding path program 1 times [2022-07-22 20:45:08,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:45:08,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768724386] [2022-07-22 20:45:08,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:45:08,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:45:08,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:08,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 20:45:08,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:08,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 20:45:08,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:08,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-22 20:45:08,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:08,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-07-22 20:45:08,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:08,489 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-22 20:45:08,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:45:08,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768724386] [2022-07-22 20:45:08,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768724386] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 20:45:08,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421257152] [2022-07-22 20:45:08,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:45:08,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 20:45:08,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 20:45:08,494 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 20:45:08,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 20:45:08,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:08,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 20:45:08,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 20:45:08,639 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-22 20:45:08,640 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 20:45:08,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421257152] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:45:08,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 20:45:08,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-07-22 20:45:08,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973206578] [2022-07-22 20:45:08,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:45:08,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 20:45:08,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:45:08,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 20:45:08,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:45:08,642 INFO L87 Difference]: Start difference. First operand 1469 states and 1995 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-22 20:45:08,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:45:08,700 INFO L93 Difference]: Finished difference Result 2192 states and 2933 transitions. [2022-07-22 20:45:08,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 20:45:08,701 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 88 [2022-07-22 20:45:08,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:45:08,706 INFO L225 Difference]: With dead ends: 2192 [2022-07-22 20:45:08,707 INFO L226 Difference]: Without dead ends: 1347 [2022-07-22 20:45:08,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:45:08,709 INFO L413 NwaCegarLoop]: 731 mSDtfsCounter, 660 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 660 SdHoareTripleChecker+Valid, 806 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:45:08,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [660 Valid, 806 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 20:45:08,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1347 states. [2022-07-22 20:45:08,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1347 to 1332. [2022-07-22 20:45:08,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1332 states, 1194 states have (on average 1.3500837520938023) internal successors, (1612), 1212 states have internal predecessors, (1612), 85 states have call successors, (85), 44 states have call predecessors, (85), 51 states have return successors, (118), 76 states have call predecessors, (118), 82 states have call successors, (118) [2022-07-22 20:45:08,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1332 states to 1332 states and 1815 transitions. [2022-07-22 20:45:08,769 INFO L78 Accepts]: Start accepts. Automaton has 1332 states and 1815 transitions. Word has length 88 [2022-07-22 20:45:08,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:45:08,769 INFO L495 AbstractCegarLoop]: Abstraction has 1332 states and 1815 transitions. [2022-07-22 20:45:08,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-22 20:45:08,769 INFO L276 IsEmpty]: Start isEmpty. Operand 1332 states and 1815 transitions. [2022-07-22 20:45:08,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-07-22 20:45:08,772 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:45:08,772 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-22 20:45:08,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 20:45:08,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 20:45:08,988 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:45:08,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:45:08,988 INFO L85 PathProgramCache]: Analyzing trace with hash -237141579, now seen corresponding path program 1 times [2022-07-22 20:45:08,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:45:08,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637608149] [2022-07-22 20:45:08,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:45:08,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:45:09,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:09,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 20:45:09,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:09,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 20:45:09,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:09,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-22 20:45:09,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:09,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-22 20:45:09,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:09,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-22 20:45:09,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:09,065 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-22 20:45:09,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:45:09,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637608149] [2022-07-22 20:45:09,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637608149] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 20:45:09,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233286179] [2022-07-22 20:45:09,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:45:09,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 20:45:09,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 20:45:09,068 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 20:45:09,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 20:45:09,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:09,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 20:45:09,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 20:45:09,211 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-22 20:45:09,211 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 20:45:09,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233286179] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:45:09,211 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 20:45:09,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-07-22 20:45:09,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491123292] [2022-07-22 20:45:09,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:45:09,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 20:45:09,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:45:09,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 20:45:09,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:45:09,213 INFO L87 Difference]: Start difference. First operand 1332 states and 1815 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-22 20:45:09,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:45:09,258 INFO L93 Difference]: Finished difference Result 1711 states and 2283 transitions. [2022-07-22 20:45:09,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 20:45:09,258 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 103 [2022-07-22 20:45:09,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:45:09,261 INFO L225 Difference]: With dead ends: 1711 [2022-07-22 20:45:09,261 INFO L226 Difference]: Without dead ends: 385 [2022-07-22 20:45:09,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:45:09,263 INFO L413 NwaCegarLoop]: 745 mSDtfsCounter, 62 mSDsluCounter, 675 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 1420 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:45:09,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 1420 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 20:45:09,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2022-07-22 20:45:09,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 385. [2022-07-22 20:45:09,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 350 states have (on average 1.582857142857143) internal successors, (554), 352 states have internal predecessors, (554), 28 states have call successors, (28), 7 states have call predecessors, (28), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-07-22 20:45:09,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 608 transitions. [2022-07-22 20:45:09,276 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 608 transitions. Word has length 103 [2022-07-22 20:45:09,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:45:09,276 INFO L495 AbstractCegarLoop]: Abstraction has 385 states and 608 transitions. [2022-07-22 20:45:09,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-22 20:45:09,277 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 608 transitions. [2022-07-22 20:45:09,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-07-22 20:45:09,278 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:45:09,278 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:45:09,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 20:45:09,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 20:45:09,496 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:45:09,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:45:09,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1921252372, now seen corresponding path program 1 times [2022-07-22 20:45:09,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:45:09,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372962417] [2022-07-22 20:45:09,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:45:09,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:45:09,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:09,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:45:09,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:09,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-22 20:45:09,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:09,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-22 20:45:09,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:09,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-07-22 20:45:09,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:09,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-07-22 20:45:09,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:09,628 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 20:45:09,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:45:09,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372962417] [2022-07-22 20:45:09,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372962417] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:45:09,628 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:45:09,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 20:45:09,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637646992] [2022-07-22 20:45:09,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:45:09,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 20:45:09,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:45:09,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 20:45:09,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 20:45:09,630 INFO L87 Difference]: Start difference. First operand 385 states and 608 transitions. Second operand has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 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 20:45:10,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:45:10,961 INFO L93 Difference]: Finished difference Result 905 states and 1452 transitions. [2022-07-22 20:45:10,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 20:45:10,962 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 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 179 [2022-07-22 20:45:10,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:45:10,967 INFO L225 Difference]: With dead ends: 905 [2022-07-22 20:45:10,967 INFO L226 Difference]: Without dead ends: 527 [2022-07-22 20:45:10,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-22 20:45:10,969 INFO L413 NwaCegarLoop]: 669 mSDtfsCounter, 1044 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1068 SdHoareTripleChecker+Valid, 1079 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-22 20:45:10,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1068 Valid, 1079 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-22 20:45:10,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2022-07-22 20:45:10,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 385. [2022-07-22 20:45:10,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 350 states have (on average 1.58) internal successors, (553), 352 states have internal predecessors, (553), 28 states have call successors, (28), 7 states have call predecessors, (28), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-07-22 20:45:10,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 607 transitions. [2022-07-22 20:45:10,996 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 607 transitions. Word has length 179 [2022-07-22 20:45:10,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:45:10,997 INFO L495 AbstractCegarLoop]: Abstraction has 385 states and 607 transitions. [2022-07-22 20:45:10,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 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 20:45:10,997 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 607 transitions. [2022-07-22 20:45:10,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-07-22 20:45:10,999 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:45:11,000 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:45:11,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-22 20:45:11,001 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:45:11,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:45:11,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1272659602, now seen corresponding path program 1 times [2022-07-22 20:45:11,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:45:11,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953323955] [2022-07-22 20:45:11,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:45:11,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:45:11,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:11,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:45:11,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:11,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-22 20:45:11,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:11,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-22 20:45:11,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:11,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-07-22 20:45:11,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:11,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-07-22 20:45:11,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:11,134 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 20:45:11,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:45:11,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953323955] [2022-07-22 20:45:11,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953323955] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:45:11,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:45:11,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 20:45:11,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384771956] [2022-07-22 20:45:11,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:45:11,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 20:45:11,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:45:11,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 20:45:11,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 20:45:11,138 INFO L87 Difference]: Start difference. First operand 385 states and 607 transitions. Second operand has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 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 20:45:12,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:45:12,460 INFO L93 Difference]: Finished difference Result 897 states and 1435 transitions. [2022-07-22 20:45:12,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 20:45:12,461 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 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 179 [2022-07-22 20:45:12,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:45:12,464 INFO L225 Difference]: With dead ends: 897 [2022-07-22 20:45:12,464 INFO L226 Difference]: Without dead ends: 527 [2022-07-22 20:45:12,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-22 20:45:12,466 INFO L413 NwaCegarLoop]: 668 mSDtfsCounter, 1035 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1059 SdHoareTripleChecker+Valid, 1077 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-22 20:45:12,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1059 Valid, 1077 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-22 20:45:12,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2022-07-22 20:45:12,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 385. [2022-07-22 20:45:12,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 350 states have (on average 1.5771428571428572) internal successors, (552), 352 states have internal predecessors, (552), 28 states have call successors, (28), 7 states have call predecessors, (28), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-07-22 20:45:12,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 606 transitions. [2022-07-22 20:45:12,493 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 606 transitions. Word has length 179 [2022-07-22 20:45:12,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:45:12,493 INFO L495 AbstractCegarLoop]: Abstraction has 385 states and 606 transitions. [2022-07-22 20:45:12,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 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 20:45:12,494 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 606 transitions. [2022-07-22 20:45:12,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-07-22 20:45:12,495 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:45:12,496 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:45:12,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-22 20:45:12,496 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:45:12,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:45:12,497 INFO L85 PathProgramCache]: Analyzing trace with hash 774102800, now seen corresponding path program 1 times [2022-07-22 20:45:12,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:45:12,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426171303] [2022-07-22 20:45:12,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:45:12,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:45:12,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:12,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:45:12,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:12,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-22 20:45:12,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:12,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-22 20:45:12,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:12,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-07-22 20:45:12,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:12,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-07-22 20:45:12,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:12,659 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 20:45:12,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:45:12,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426171303] [2022-07-22 20:45:12,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426171303] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:45:12,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:45:12,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 20:45:12,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330635592] [2022-07-22 20:45:12,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:45:12,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 20:45:12,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:45:12,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 20:45:12,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-22 20:45:12,663 INFO L87 Difference]: Start difference. First operand 385 states and 606 transitions. Second operand has 6 states, 6 states have (on average 28.0) internal successors, (168), 4 states have internal predecessors, (168), 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 20:45:15,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:45:15,252 INFO L93 Difference]: Finished difference Result 1415 states and 2277 transitions. [2022-07-22 20:45:15,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 20:45:15,252 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 28.0) internal successors, (168), 4 states have internal predecessors, (168), 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 179 [2022-07-22 20:45:15,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:45:15,259 INFO L225 Difference]: With dead ends: 1415 [2022-07-22 20:45:15,259 INFO L226 Difference]: Without dead ends: 1051 [2022-07-22 20:45:15,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-07-22 20:45:15,261 INFO L413 NwaCegarLoop]: 720 mSDtfsCounter, 1568 mSDsluCounter, 983 mSDsCounter, 0 mSdLazyCounter, 2018 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1587 SdHoareTripleChecker+Valid, 1703 SdHoareTripleChecker+Invalid, 2142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 2018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-22 20:45:15,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1587 Valid, 1703 Invalid, 2142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 2018 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-22 20:45:15,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2022-07-22 20:45:15,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 766. [2022-07-22 20:45:15,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 766 states, 703 states have (on average 1.5903271692745378) internal successors, (1118), 706 states have internal predecessors, (1118), 49 states have call successors, (49), 13 states have call predecessors, (49), 13 states have return successors, (50), 47 states have call predecessors, (50), 47 states have call successors, (50) [2022-07-22 20:45:15,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 1217 transitions. [2022-07-22 20:45:15,312 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 1217 transitions. Word has length 179 [2022-07-22 20:45:15,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:45:15,312 INFO L495 AbstractCegarLoop]: Abstraction has 766 states and 1217 transitions. [2022-07-22 20:45:15,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 28.0) internal successors, (168), 4 states have internal predecessors, (168), 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 20:45:15,312 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 1217 transitions. [2022-07-22 20:45:15,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-07-22 20:45:15,314 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:45:15,314 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:45:15,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-22 20:45:15,315 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:45:15,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:45:15,315 INFO L85 PathProgramCache]: Analyzing trace with hash -611636980, now seen corresponding path program 1 times [2022-07-22 20:45:15,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:45:15,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703586836] [2022-07-22 20:45:15,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:45:15,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:45:15,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:15,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:45:15,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:15,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-22 20:45:15,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:15,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-22 20:45:15,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:15,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-07-22 20:45:15,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:15,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-07-22 20:45:15,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:15,466 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 20:45:15,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:45:15,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703586836] [2022-07-22 20:45:15,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703586836] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:45:15,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:45:15,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:45:15,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735387757] [2022-07-22 20:45:15,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:45:15,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:45:15,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:45:15,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:45:15,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:45:15,469 INFO L87 Difference]: Start difference. First operand 766 states and 1217 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 20:45:18,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:45:18,661 INFO L93 Difference]: Finished difference Result 2338 states and 3771 transitions. [2022-07-22 20:45:18,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 20:45:18,662 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 179 [2022-07-22 20:45:18,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:45:18,671 INFO L225 Difference]: With dead ends: 2338 [2022-07-22 20:45:18,671 INFO L226 Difference]: Without dead ends: 1593 [2022-07-22 20:45:18,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-22 20:45:18,674 INFO L413 NwaCegarLoop]: 1033 mSDtfsCounter, 1595 mSDsluCounter, 1956 mSDsCounter, 0 mSdLazyCounter, 3144 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1614 SdHoareTripleChecker+Valid, 2989 SdHoareTripleChecker+Invalid, 3223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 3144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-22 20:45:18,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1614 Valid, 2989 Invalid, 3223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 3144 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-22 20:45:18,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1593 states. [2022-07-22 20:45:18,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1593 to 1120. [2022-07-22 20:45:18,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1120 states, 1029 states have (on average 1.5840621963070942) internal successors, (1630), 1033 states have internal predecessors, (1630), 70 states have call successors, (70), 19 states have call predecessors, (70), 20 states have return successors, (73), 69 states have call predecessors, (73), 68 states have call successors, (73) [2022-07-22 20:45:18,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 1773 transitions. [2022-07-22 20:45:18,750 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 1773 transitions. Word has length 179 [2022-07-22 20:45:18,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:45:18,751 INFO L495 AbstractCegarLoop]: Abstraction has 1120 states and 1773 transitions. [2022-07-22 20:45:18,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 20:45:18,752 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 1773 transitions. [2022-07-22 20:45:18,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-07-22 20:45:18,754 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:45:18,754 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:45:18,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-22 20:45:18,754 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:45:18,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:45:18,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1913858702, now seen corresponding path program 1 times [2022-07-22 20:45:18,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:45:18,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523828068] [2022-07-22 20:45:18,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:45:18,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:45:18,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:18,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:45:18,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:18,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-22 20:45:18,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:18,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-22 20:45:18,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:18,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-07-22 20:45:18,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:18,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-07-22 20:45:18,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:18,899 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 20:45:18,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:45:18,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523828068] [2022-07-22 20:45:18,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523828068] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:45:18,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:45:18,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:45:18,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407363328] [2022-07-22 20:45:18,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:45:18,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:45:18,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:45:18,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:45:18,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:45:18,901 INFO L87 Difference]: Start difference. First operand 1120 states and 1773 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 20:45:22,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:45:22,074 INFO L93 Difference]: Finished difference Result 3699 states and 5955 transitions. [2022-07-22 20:45:22,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 20:45:22,075 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 179 [2022-07-22 20:45:22,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:45:22,088 INFO L225 Difference]: With dead ends: 3699 [2022-07-22 20:45:22,088 INFO L226 Difference]: Without dead ends: 2600 [2022-07-22 20:45:22,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-22 20:45:22,092 INFO L413 NwaCegarLoop]: 1025 mSDtfsCounter, 1592 mSDsluCounter, 1956 mSDsCounter, 0 mSdLazyCounter, 3146 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1611 SdHoareTripleChecker+Valid, 2981 SdHoareTripleChecker+Invalid, 3228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 3146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-22 20:45:22,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1611 Valid, 2981 Invalid, 3228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 3146 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-22 20:45:22,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2600 states. [2022-07-22 20:45:22,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2600 to 1829. [2022-07-22 20:45:22,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1829 states, 1682 states have (on average 1.5784780023781213) internal successors, (2655), 1688 states have internal predecessors, (2655), 112 states have call successors, (112), 31 states have call predecessors, (112), 34 states have return successors, (123), 113 states have call predecessors, (123), 110 states have call successors, (123) [2022-07-22 20:45:22,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1829 states to 1829 states and 2890 transitions. [2022-07-22 20:45:22,251 INFO L78 Accepts]: Start accepts. Automaton has 1829 states and 2890 transitions. Word has length 179 [2022-07-22 20:45:22,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:45:22,251 INFO L495 AbstractCegarLoop]: Abstraction has 1829 states and 2890 transitions. [2022-07-22 20:45:22,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 20:45:22,252 INFO L276 IsEmpty]: Start isEmpty. Operand 1829 states and 2890 transitions. [2022-07-22 20:45:22,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-07-22 20:45:22,254 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:45:22,255 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:45:22,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-22 20:45:22,255 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:45:22,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:45:22,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1302589644, now seen corresponding path program 1 times [2022-07-22 20:45:22,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:45:22,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267886869] [2022-07-22 20:45:22,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:45:22,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:45:22,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:22,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:45:22,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:22,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-22 20:45:22,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:22,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-22 20:45:22,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:22,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-07-22 20:45:22,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:22,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-07-22 20:45:22,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:22,420 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 20:45:22,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:45:22,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267886869] [2022-07-22 20:45:22,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267886869] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:45:22,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:45:22,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:45:22,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033786159] [2022-07-22 20:45:22,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:45:22,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:45:22,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:45:22,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:45:22,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:45:22,424 INFO L87 Difference]: Start difference. First operand 1829 states and 2890 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 20:45:24,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:45:24,131 INFO L93 Difference]: Finished difference Result 4396 states and 7063 transitions. [2022-07-22 20:45:24,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 20:45:24,132 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 179 [2022-07-22 20:45:24,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:45:24,141 INFO L225 Difference]: With dead ends: 4396 [2022-07-22 20:45:24,142 INFO L226 Difference]: Without dead ends: 2588 [2022-07-22 20:45:24,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-07-22 20:45:24,145 INFO L413 NwaCegarLoop]: 657 mSDtfsCounter, 1132 mSDsluCounter, 968 mSDsCounter, 0 mSdLazyCounter, 1508 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1152 SdHoareTripleChecker+Valid, 1625 SdHoareTripleChecker+Invalid, 1594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-22 20:45:24,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1152 Valid, 1625 Invalid, 1594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1508 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-22 20:45:24,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2588 states. [2022-07-22 20:45:24,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2588 to 1829. [2022-07-22 20:45:24,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1829 states, 1682 states have (on average 1.5755053507728893) internal successors, (2650), 1688 states have internal predecessors, (2650), 112 states have call successors, (112), 31 states have call predecessors, (112), 34 states have return successors, (123), 113 states have call predecessors, (123), 110 states have call successors, (123) [2022-07-22 20:45:24,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1829 states to 1829 states and 2885 transitions. [2022-07-22 20:45:24,310 INFO L78 Accepts]: Start accepts. Automaton has 1829 states and 2885 transitions. Word has length 179 [2022-07-22 20:45:24,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:45:24,310 INFO L495 AbstractCegarLoop]: Abstraction has 1829 states and 2885 transitions. [2022-07-22 20:45:24,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 20:45:24,310 INFO L276 IsEmpty]: Start isEmpty. Operand 1829 states and 2885 transitions. [2022-07-22 20:45:24,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-07-22 20:45:24,312 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:45:24,312 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:45:24,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-22 20:45:24,313 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:45:24,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:45:24,313 INFO L85 PathProgramCache]: Analyzing trace with hash -102602034, now seen corresponding path program 1 times [2022-07-22 20:45:24,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:45:24,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371635085] [2022-07-22 20:45:24,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:45:24,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:45:24,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:24,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:45:24,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:24,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-22 20:45:24,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:24,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-22 20:45:24,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:24,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-07-22 20:45:24,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:24,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-07-22 20:45:24,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:24,449 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 20:45:24,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:45:24,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371635085] [2022-07-22 20:45:24,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371635085] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:45:24,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:45:24,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:45:24,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477822472] [2022-07-22 20:45:24,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:45:24,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:45:24,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:45:24,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:45:24,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:45:24,451 INFO L87 Difference]: Start difference. First operand 1829 states and 2885 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 20:45:26,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:45:26,111 INFO L93 Difference]: Finished difference Result 4390 states and 7037 transitions. [2022-07-22 20:45:26,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 20:45:26,112 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 179 [2022-07-22 20:45:26,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:45:26,121 INFO L225 Difference]: With dead ends: 4390 [2022-07-22 20:45:26,121 INFO L226 Difference]: Without dead ends: 2582 [2022-07-22 20:45:26,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-07-22 20:45:26,126 INFO L413 NwaCegarLoop]: 651 mSDtfsCounter, 1132 mSDsluCounter, 968 mSDsCounter, 0 mSdLazyCounter, 1493 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1152 SdHoareTripleChecker+Valid, 1619 SdHoareTripleChecker+Invalid, 1582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-22 20:45:26,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1152 Valid, 1619 Invalid, 1582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1493 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-22 20:45:26,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2582 states. [2022-07-22 20:45:26,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2582 to 1829. [2022-07-22 20:45:26,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1829 states, 1682 states have (on average 1.5725326991676576) internal successors, (2645), 1688 states have internal predecessors, (2645), 112 states have call successors, (112), 31 states have call predecessors, (112), 34 states have return successors, (123), 113 states have call predecessors, (123), 110 states have call successors, (123) [2022-07-22 20:45:26,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1829 states to 1829 states and 2880 transitions. [2022-07-22 20:45:26,316 INFO L78 Accepts]: Start accepts. Automaton has 1829 states and 2880 transitions. Word has length 179 [2022-07-22 20:45:26,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:45:26,317 INFO L495 AbstractCegarLoop]: Abstraction has 1829 states and 2880 transitions. [2022-07-22 20:45:26,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 20:45:26,317 INFO L276 IsEmpty]: Start isEmpty. Operand 1829 states and 2880 transitions. [2022-07-22 20:45:26,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-07-22 20:45:26,319 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:45:26,319 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:45:26,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-22 20:45:26,320 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:45:26,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:45:26,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1791731852, now seen corresponding path program 1 times [2022-07-22 20:45:26,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:45:26,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173503952] [2022-07-22 20:45:26,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:45:26,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:45:26,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:26,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:45:26,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:26,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-22 20:45:26,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:26,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-22 20:45:26,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:26,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-07-22 20:45:26,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:26,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-07-22 20:45:26,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:26,509 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 20:45:26,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:45:26,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173503952] [2022-07-22 20:45:26,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173503952] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:45:26,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:45:26,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:45:26,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163182308] [2022-07-22 20:45:26,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:45:26,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:45:26,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:45:26,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:45:26,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:45:26,512 INFO L87 Difference]: Start difference. First operand 1829 states and 2880 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 20:45:27,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:45:27,942 INFO L93 Difference]: Finished difference Result 4378 states and 6999 transitions. [2022-07-22 20:45:27,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 20:45:27,942 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 179 [2022-07-22 20:45:27,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:45:27,952 INFO L225 Difference]: With dead ends: 4378 [2022-07-22 20:45:27,952 INFO L226 Difference]: Without dead ends: 2570 [2022-07-22 20:45:27,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-07-22 20:45:27,956 INFO L413 NwaCegarLoop]: 605 mSDtfsCounter, 1374 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 1267 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1394 SdHoareTripleChecker+Valid, 1370 SdHoareTripleChecker+Invalid, 1385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 1267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:45:27,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1394 Valid, 1370 Invalid, 1385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 1267 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-22 20:45:27,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2570 states. [2022-07-22 20:45:28,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2570 to 1829. [2022-07-22 20:45:28,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1829 states, 1682 states have (on average 1.5695600475624256) internal successors, (2640), 1688 states have internal predecessors, (2640), 112 states have call successors, (112), 31 states have call predecessors, (112), 34 states have return successors, (123), 113 states have call predecessors, (123), 110 states have call successors, (123) [2022-07-22 20:45:28,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1829 states to 1829 states and 2875 transitions. [2022-07-22 20:45:28,126 INFO L78 Accepts]: Start accepts. Automaton has 1829 states and 2875 transitions. Word has length 179 [2022-07-22 20:45:28,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:45:28,126 INFO L495 AbstractCegarLoop]: Abstraction has 1829 states and 2875 transitions. [2022-07-22 20:45:28,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 20:45:28,127 INFO L276 IsEmpty]: Start isEmpty. Operand 1829 states and 2875 transitions. [2022-07-22 20:45:28,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-07-22 20:45:28,129 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:45:28,129 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:45:28,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-22 20:45:28,129 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:45:28,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:45:28,130 INFO L85 PathProgramCache]: Analyzing trace with hash 868564426, now seen corresponding path program 1 times [2022-07-22 20:45:28,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:45:28,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54996879] [2022-07-22 20:45:28,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:45:28,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:45:28,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:28,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:45:28,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:28,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-22 20:45:28,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:28,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-22 20:45:28,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:28,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-07-22 20:45:28,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:28,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-07-22 20:45:28,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:28,269 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 20:45:28,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:45:28,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54996879] [2022-07-22 20:45:28,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54996879] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:45:28,270 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:45:28,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:45:28,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891896914] [2022-07-22 20:45:28,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:45:28,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:45:28,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:45:28,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:45:28,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:45:28,272 INFO L87 Difference]: Start difference. First operand 1829 states and 2875 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 20:45:31,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:45:31,322 INFO L93 Difference]: Finished difference Result 6291 states and 10012 transitions. [2022-07-22 20:45:31,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 20:45:31,323 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 179 [2022-07-22 20:45:31,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:45:31,338 INFO L225 Difference]: With dead ends: 6291 [2022-07-22 20:45:31,338 INFO L226 Difference]: Without dead ends: 4483 [2022-07-22 20:45:31,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-22 20:45:31,342 INFO L413 NwaCegarLoop]: 997 mSDtfsCounter, 1567 mSDsluCounter, 1956 mSDsCounter, 0 mSdLazyCounter, 3068 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1586 SdHoareTripleChecker+Valid, 2953 SdHoareTripleChecker+Invalid, 3154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 3068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-22 20:45:31,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1586 Valid, 2953 Invalid, 3154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 3068 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-22 20:45:31,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4483 states. [2022-07-22 20:45:31,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4483 to 3266. [2022-07-22 20:45:31,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3266 states, 3007 states have (on average 1.5643498503491853) internal successors, (4704), 3017 states have internal predecessors, (4704), 196 states have call successors, (196), 55 states have call predecessors, (196), 62 states have return successors, (229), 201 states have call predecessors, (229), 194 states have call successors, (229) [2022-07-22 20:45:31,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3266 states to 3266 states and 5129 transitions. [2022-07-22 20:45:31,662 INFO L78 Accepts]: Start accepts. Automaton has 3266 states and 5129 transitions. Word has length 179 [2022-07-22 20:45:31,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:45:31,662 INFO L495 AbstractCegarLoop]: Abstraction has 3266 states and 5129 transitions. [2022-07-22 20:45:31,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 20:45:31,663 INFO L276 IsEmpty]: Start isEmpty. Operand 3266 states and 5129 transitions. [2022-07-22 20:45:31,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-07-22 20:45:31,666 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:45:31,666 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:45:31,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-22 20:45:31,667 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:45:31,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:45:31,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1254426828, now seen corresponding path program 1 times [2022-07-22 20:45:31,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:45:31,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830317847] [2022-07-22 20:45:31,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:45:31,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:45:31,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:31,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:45:31,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:31,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-22 20:45:31,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:31,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-22 20:45:31,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:31,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-07-22 20:45:31,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:31,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-07-22 20:45:31,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:31,806 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 20:45:31,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:45:31,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830317847] [2022-07-22 20:45:31,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830317847] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:45:31,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:45:31,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:45:31,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544833802] [2022-07-22 20:45:31,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:45:31,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:45:31,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:45:31,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:45:31,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:45:31,810 INFO L87 Difference]: Start difference. First operand 3266 states and 5129 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 20:45:33,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:45:33,521 INFO L93 Difference]: Finished difference Result 7748 states and 12334 transitions. [2022-07-22 20:45:33,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 20:45:33,522 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 179 [2022-07-22 20:45:33,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:45:33,536 INFO L225 Difference]: With dead ends: 7748 [2022-07-22 20:45:33,537 INFO L226 Difference]: Without dead ends: 4503 [2022-07-22 20:45:33,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-07-22 20:45:33,543 INFO L413 NwaCegarLoop]: 638 mSDtfsCounter, 1128 mSDsluCounter, 968 mSDsCounter, 0 mSdLazyCounter, 1456 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1148 SdHoareTripleChecker+Valid, 1606 SdHoareTripleChecker+Invalid, 1545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-22 20:45:33,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1148 Valid, 1606 Invalid, 1545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1456 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-22 20:45:33,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4503 states. [2022-07-22 20:45:33,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4503 to 3266. [2022-07-22 20:45:33,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3266 states, 3007 states have (on average 1.5613568340538744) internal successors, (4695), 3017 states have internal predecessors, (4695), 196 states have call successors, (196), 55 states have call predecessors, (196), 62 states have return successors, (229), 201 states have call predecessors, (229), 194 states have call successors, (229) [2022-07-22 20:45:33,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3266 states to 3266 states and 5120 transitions. [2022-07-22 20:45:33,828 INFO L78 Accepts]: Start accepts. Automaton has 3266 states and 5120 transitions. Word has length 179 [2022-07-22 20:45:33,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:45:33,828 INFO L495 AbstractCegarLoop]: Abstraction has 3266 states and 5120 transitions. [2022-07-22 20:45:33,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 20:45:33,828 INFO L276 IsEmpty]: Start isEmpty. Operand 3266 states and 5120 transitions. [2022-07-22 20:45:33,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-07-22 20:45:33,831 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:45:33,831 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:45:33,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-22 20:45:33,831 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:45:33,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:45:33,832 INFO L85 PathProgramCache]: Analyzing trace with hash 989779338, now seen corresponding path program 1 times [2022-07-22 20:45:33,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:45:33,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440111126] [2022-07-22 20:45:33,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:45:33,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:45:33,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:33,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:45:33,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:33,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-22 20:45:33,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:33,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-22 20:45:33,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:33,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-07-22 20:45:33,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:33,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-07-22 20:45:33,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:33,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:45:33,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:45:33,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440111126] [2022-07-22 20:45:33,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440111126] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:45:33,957 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:45:33,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:45:33,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802376983] [2022-07-22 20:45:33,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:45:33,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:45:33,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:45:33,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:45:33,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:45:33,959 INFO L87 Difference]: Start difference. First operand 3266 states and 5120 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 20:45:37,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:45:37,443 INFO L93 Difference]: Finished difference Result 11516 states and 18248 transitions. [2022-07-22 20:45:37,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 20:45:37,444 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 179 [2022-07-22 20:45:37,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:45:37,472 INFO L225 Difference]: With dead ends: 11516 [2022-07-22 20:45:37,472 INFO L226 Difference]: Without dead ends: 8271 [2022-07-22 20:45:37,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-22 20:45:37,481 INFO L413 NwaCegarLoop]: 986 mSDtfsCounter, 1559 mSDsluCounter, 1956 mSDsCounter, 0 mSdLazyCounter, 3041 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1578 SdHoareTripleChecker+Valid, 2942 SdHoareTripleChecker+Invalid, 3127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 3041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-22 20:45:37,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1578 Valid, 2942 Invalid, 3127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 3041 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-22 20:45:37,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8271 states. [2022-07-22 20:45:38,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8271 to 6148. [2022-07-22 20:45:38,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6148 states, 5665 states have (on average 1.5567519858781995) internal successors, (8819), 5683 states have internal predecessors, (8819), 364 states have call successors, (364), 103 states have call predecessors, (364), 118 states have return successors, (459), 377 states have call predecessors, (459), 362 states have call successors, (459) [2022-07-22 20:45:38,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6148 states to 6148 states and 9642 transitions. [2022-07-22 20:45:38,082 INFO L78 Accepts]: Start accepts. Automaton has 6148 states and 9642 transitions. Word has length 179 [2022-07-22 20:45:38,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:45:38,082 INFO L495 AbstractCegarLoop]: Abstraction has 6148 states and 9642 transitions. [2022-07-22 20:45:38,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 20:45:38,083 INFO L276 IsEmpty]: Start isEmpty. Operand 6148 states and 9642 transitions. [2022-07-22 20:45:38,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-07-22 20:45:38,086 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:45:38,086 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:45:38,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-22 20:45:38,087 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:45:38,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:45:38,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1374062324, now seen corresponding path program 1 times [2022-07-22 20:45:38,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:45:38,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603844421] [2022-07-22 20:45:38,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:45:38,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:45:38,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:38,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:45:38,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:38,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-22 20:45:38,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:38,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-22 20:45:38,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:38,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-07-22 20:45:38,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:38,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-07-22 20:45:38,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:38,234 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 20:45:38,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:45:38,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603844421] [2022-07-22 20:45:38,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603844421] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:45:38,235 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:45:38,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:45:38,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791077549] [2022-07-22 20:45:38,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:45:38,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:45:38,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:45:38,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:45:38,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:45:38,237 INFO L87 Difference]: Start difference. First operand 6148 states and 9642 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 20:45:40,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:45:40,332 INFO L93 Difference]: Finished difference Result 14476 states and 22997 transitions. [2022-07-22 20:45:40,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 20:45:40,333 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 179 [2022-07-22 20:45:40,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:45:40,354 INFO L225 Difference]: With dead ends: 14476 [2022-07-22 20:45:40,355 INFO L226 Difference]: Without dead ends: 8349 [2022-07-22 20:45:40,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-07-22 20:45:40,370 INFO L413 NwaCegarLoop]: 631 mSDtfsCounter, 1294 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 1279 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1314 SdHoareTripleChecker+Valid, 1396 SdHoareTripleChecker+Invalid, 1396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:45:40,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1314 Valid, 1396 Invalid, 1396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1279 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-22 20:45:40,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8349 states. [2022-07-22 20:45:41,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8349 to 6148. [2022-07-22 20:45:41,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6148 states, 5665 states have (on average 1.5537511032656663) internal successors, (8802), 5683 states have internal predecessors, (8802), 364 states have call successors, (364), 103 states have call predecessors, (364), 118 states have return successors, (459), 377 states have call predecessors, (459), 362 states have call successors, (459) [2022-07-22 20:45:41,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6148 states to 6148 states and 9625 transitions. [2022-07-22 20:45:41,058 INFO L78 Accepts]: Start accepts. Automaton has 6148 states and 9625 transitions. Word has length 179 [2022-07-22 20:45:41,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:45:41,058 INFO L495 AbstractCegarLoop]: Abstraction has 6148 states and 9625 transitions. [2022-07-22 20:45:41,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 20:45:41,059 INFO L276 IsEmpty]: Start isEmpty. Operand 6148 states and 9625 transitions. [2022-07-22 20:45:41,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-07-22 20:45:41,063 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:45:41,063 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:45:41,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-22 20:45:41,064 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:45:41,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:45:41,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1597726026, now seen corresponding path program 1 times [2022-07-22 20:45:41,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:45:41,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18399419] [2022-07-22 20:45:41,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:45:41,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:45:41,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:41,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:45:41,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:41,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-22 20:45:41,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:41,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-22 20:45:41,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:41,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-07-22 20:45:41,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:41,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-07-22 20:45:41,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:41,257 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 20:45:41,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:45:41,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18399419] [2022-07-22 20:45:41,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18399419] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:45:41,257 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:45:41,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:45:41,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377963224] [2022-07-22 20:45:41,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:45:41,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:45:41,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:45:41,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:45:41,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:45:41,261 INFO L87 Difference]: Start difference. First operand 6148 states and 9625 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 20:45:43,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:45:43,536 INFO L93 Difference]: Finished difference Result 14458 states and 22910 transitions. [2022-07-22 20:45:43,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 20:45:43,537 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 179 [2022-07-22 20:45:43,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:45:43,558 INFO L225 Difference]: With dead ends: 14458 [2022-07-22 20:45:43,559 INFO L226 Difference]: Without dead ends: 8331 [2022-07-22 20:45:43,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-07-22 20:45:43,572 INFO L413 NwaCegarLoop]: 627 mSDtfsCounter, 1292 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 1269 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1312 SdHoareTripleChecker+Valid, 1392 SdHoareTripleChecker+Invalid, 1386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-22 20:45:43,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1312 Valid, 1392 Invalid, 1386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1269 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-22 20:45:43,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8331 states. [2022-07-22 20:45:44,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8331 to 6148. [2022-07-22 20:45:44,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6148 states, 5665 states have (on average 1.5507502206531332) internal successors, (8785), 5683 states have internal predecessors, (8785), 364 states have call successors, (364), 103 states have call predecessors, (364), 118 states have return successors, (459), 377 states have call predecessors, (459), 362 states have call successors, (459) [2022-07-22 20:45:44,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6148 states to 6148 states and 9608 transitions. [2022-07-22 20:45:44,149 INFO L78 Accepts]: Start accepts. Automaton has 6148 states and 9608 transitions. Word has length 179 [2022-07-22 20:45:44,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:45:44,149 INFO L495 AbstractCegarLoop]: Abstraction has 6148 states and 9608 transitions. [2022-07-22 20:45:44,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 20:45:44,149 INFO L276 IsEmpty]: Start isEmpty. Operand 6148 states and 9608 transitions. [2022-07-22 20:45:44,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-07-22 20:45:44,153 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:45:44,154 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:45:44,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-22 20:45:44,154 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:45:44,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:45:44,155 INFO L85 PathProgramCache]: Analyzing trace with hash -800261812, now seen corresponding path program 1 times [2022-07-22 20:45:44,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:45:44,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859583000] [2022-07-22 20:45:44,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:45:44,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:45:44,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:44,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:45:44,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:44,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-22 20:45:44,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:44,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-22 20:45:44,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:44,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-07-22 20:45:44,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:44,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-07-22 20:45:44,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:44,285 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 20:45:44,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:45:44,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859583000] [2022-07-22 20:45:44,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859583000] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:45:44,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:45:44,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:45:44,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254922374] [2022-07-22 20:45:44,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:45:44,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:45:44,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:45:44,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:45:44,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:45:44,287 INFO L87 Difference]: Start difference. First operand 6148 states and 9608 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 20:45:48,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:45:48,725 INFO L93 Difference]: Finished difference Result 21944 states and 34608 transitions. [2022-07-22 20:45:48,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 20:45:48,725 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 179 [2022-07-22 20:45:48,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:45:48,771 INFO L225 Difference]: With dead ends: 21944 [2022-07-22 20:45:48,771 INFO L226 Difference]: Without dead ends: 15817 [2022-07-22 20:45:48,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-22 20:45:48,789 INFO L413 NwaCegarLoop]: 967 mSDtfsCounter, 1547 mSDsluCounter, 1956 mSDsCounter, 0 mSdLazyCounter, 2992 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1566 SdHoareTripleChecker+Valid, 2923 SdHoareTripleChecker+Invalid, 3081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 2992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-22 20:45:48,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1566 Valid, 2923 Invalid, 3081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 2992 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-22 20:45:48,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15817 states. [2022-07-22 20:45:49,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15817 to 11959. [2022-07-22 20:45:49,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11959 states, 11028 states have (on average 1.5465179542981502) internal successors, (17055), 11062 states have internal predecessors, (17055), 700 states have call successors, (700), 199 states have call predecessors, (700), 230 states have return successors, (973), 729 states have call predecessors, (973), 698 states have call successors, (973) [2022-07-22 20:45:49,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11959 states to 11959 states and 18728 transitions. [2022-07-22 20:45:49,998 INFO L78 Accepts]: Start accepts. Automaton has 11959 states and 18728 transitions. Word has length 179 [2022-07-22 20:45:49,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:45:49,998 INFO L495 AbstractCegarLoop]: Abstraction has 11959 states and 18728 transitions. [2022-07-22 20:45:49,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 20:45:49,998 INFO L276 IsEmpty]: Start isEmpty. Operand 11959 states and 18728 transitions. [2022-07-22 20:45:50,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-07-22 20:45:50,006 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:45:50,006 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:45:50,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-22 20:45:50,006 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:45:50,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:45:50,007 INFO L85 PathProgramCache]: Analyzing trace with hash -461974262, now seen corresponding path program 1 times [2022-07-22 20:45:50,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:45:50,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771219176] [2022-07-22 20:45:50,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:45:50,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:45:50,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:50,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:45:50,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:50,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-22 20:45:50,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:50,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-22 20:45:50,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:50,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-07-22 20:45:50,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:50,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-07-22 20:45:50,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:45:50,144 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 20:45:50,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:45:50,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771219176] [2022-07-22 20:45:50,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771219176] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:45:50,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:45:50,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:45:50,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781021525] [2022-07-22 20:45:50,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:45:50,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:45:50,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:45:50,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:45:50,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:45:50,147 INFO L87 Difference]: Start difference. First operand 11959 states and 18728 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 20:45:58,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:45:58,359 INFO L93 Difference]: Finished difference Result 48119 states and 75904 transitions. [2022-07-22 20:45:58,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 20:45:58,359 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 179 [2022-07-22 20:45:58,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:45:58,470 INFO L225 Difference]: With dead ends: 48119 [2022-07-22 20:45:58,471 INFO L226 Difference]: Without dead ends: 36181 [2022-07-22 20:45:58,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-07-22 20:45:58,506 INFO L413 NwaCegarLoop]: 923 mSDtfsCounter, 1745 mSDsluCounter, 1314 mSDsCounter, 0 mSdLazyCounter, 3235 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1763 SdHoareTripleChecker+Valid, 2237 SdHoareTripleChecker+Invalid, 3362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 3235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-22 20:45:58,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1763 Valid, 2237 Invalid, 3362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 3235 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-22 20:45:58,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36181 states. [2022-07-22 20:46:01,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36181 to 23225. [2022-07-22 20:46:01,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23225 states, 21430 states have (on average 1.5426504899673354) internal successors, (33059), 21496 states have internal predecessors, (33059), 1340 states have call successors, (1340), 391 states have call predecessors, (1340), 454 states have return successors, (2131), 1401 states have call predecessors, (2131), 1338 states have call successors, (2131) [2022-07-22 20:46:01,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23225 states to 23225 states and 36530 transitions. [2022-07-22 20:46:01,253 INFO L78 Accepts]: Start accepts. Automaton has 23225 states and 36530 transitions. Word has length 179 [2022-07-22 20:46:01,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:46:01,254 INFO L495 AbstractCegarLoop]: Abstraction has 23225 states and 36530 transitions. [2022-07-22 20:46:01,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 20:46:01,254 INFO L276 IsEmpty]: Start isEmpty. Operand 23225 states and 36530 transitions. [2022-07-22 20:46:01,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-07-22 20:46:01,264 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:46:01,264 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:46:01,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-22 20:46:01,264 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:46:01,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:46:01,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1002403768, now seen corresponding path program 1 times [2022-07-22 20:46:01,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:46:01,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560161327] [2022-07-22 20:46:01,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:46:01,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:46:01,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:46:01,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:46:01,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:46:01,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-22 20:46:01,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:46:01,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-22 20:46:01,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:46:01,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-07-22 20:46:01,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:46:01,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-07-22 20:46:01,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:46:01,407 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 20:46:01,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:46:01,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560161327] [2022-07-22 20:46:01,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560161327] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:46:01,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:46:01,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:46:01,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311671931] [2022-07-22 20:46:01,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:46:01,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:46:01,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:46:01,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:46:01,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:46:01,410 INFO L87 Difference]: Start difference. First operand 23225 states and 36530 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 20:46:14,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:46:14,986 INFO L93 Difference]: Finished difference Result 93175 states and 147608 transitions. [2022-07-22 20:46:14,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 20:46:14,986 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 179 [2022-07-22 20:46:14,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:46:15,248 INFO L225 Difference]: With dead ends: 93175 [2022-07-22 20:46:15,248 INFO L226 Difference]: Without dead ends: 69971 [2022-07-22 20:46:15,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-07-22 20:46:15,331 INFO L413 NwaCegarLoop]: 951 mSDtfsCounter, 1949 mSDsluCounter, 1948 mSDsCounter, 0 mSdLazyCounter, 2959 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1981 SdHoareTripleChecker+Valid, 2899 SdHoareTripleChecker+Invalid, 3053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 2959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-22 20:46:15,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1981 Valid, 2899 Invalid, 3053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 2959 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-07-22 20:46:15,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69971 states. [2022-07-22 20:46:20,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69971 to 46042. [2022-07-22 20:46:20,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46042 states, 42551 states have (on average 1.54330098000047) internal successors, (65669), 42681 states have internal predecessors, (65669), 2588 states have call successors, (2588), 775 states have call predecessors, (2588), 902 states have return successors, (4901), 2713 states have call predecessors, (4901), 2586 states have call successors, (4901) [2022-07-22 20:46:20,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46042 states to 46042 states and 73158 transitions. [2022-07-22 20:46:20,416 INFO L78 Accepts]: Start accepts. Automaton has 46042 states and 73158 transitions. Word has length 179 [2022-07-22 20:46:20,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:46:20,416 INFO L495 AbstractCegarLoop]: Abstraction has 46042 states and 73158 transitions. [2022-07-22 20:46:20,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 20:46:20,417 INFO L276 IsEmpty]: Start isEmpty. Operand 46042 states and 73158 transitions. [2022-07-22 20:46:20,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-07-22 20:46:20,436 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:46:20,436 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:46:20,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-22 20:46:20,436 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:46:20,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:46:20,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1158384310, now seen corresponding path program 1 times [2022-07-22 20:46:20,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:46:20,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148458104] [2022-07-22 20:46:20,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:46:20,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:46:20,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:46:20,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:46:20,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:46:20,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-22 20:46:20,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:46:20,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-22 20:46:20,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:46:20,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-07-22 20:46:20,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:46:20,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-07-22 20:46:20,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:46:20,575 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 20:46:20,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:46:20,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148458104] [2022-07-22 20:46:20,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148458104] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:46:20,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:46:20,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:46:20,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087691802] [2022-07-22 20:46:20,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:46:20,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:46:20,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:46:20,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:46:20,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:46:20,578 INFO L87 Difference]: Start difference. First operand 46042 states and 73158 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 20:46:45,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:46:45,886 INFO L93 Difference]: Finished difference Result 182998 states and 292734 transitions. [2022-07-22 20:46:45,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 20:46:45,886 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 179 [2022-07-22 20:46:45,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:46:46,371 INFO L225 Difference]: With dead ends: 182998 [2022-07-22 20:46:46,371 INFO L226 Difference]: Without dead ends: 136977 [2022-07-22 20:46:46,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-07-22 20:46:46,520 INFO L413 NwaCegarLoop]: 1102 mSDtfsCounter, 1633 mSDsluCounter, 1948 mSDsCounter, 0 mSdLazyCounter, 3430 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1651 SdHoareTripleChecker+Valid, 3050 SdHoareTripleChecker+Invalid, 3521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 3430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-07-22 20:46:46,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1651 Valid, 3050 Invalid, 3521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 3430 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-07-22 20:46:46,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136977 states. [2022-07-22 20:46:57,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136977 to 91611. [2022-07-22 20:46:57,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91611 states, 84792 states have (on average 1.544379186715728) internal successors, (130951), 85050 states have internal predecessors, (130951), 5020 states have call successors, (5020), 1543 states have call predecessors, (5020), 1798 states have return successors, (11835), 5273 states have call predecessors, (11835), 5018 states have call successors, (11835) [2022-07-22 20:46:57,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91611 states to 91611 states and 147806 transitions. [2022-07-22 20:46:57,805 INFO L78 Accepts]: Start accepts. Automaton has 91611 states and 147806 transitions. Word has length 179 [2022-07-22 20:46:57,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:46:57,805 INFO L495 AbstractCegarLoop]: Abstraction has 91611 states and 147806 transitions. [2022-07-22 20:46:57,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 20:46:57,806 INFO L276 IsEmpty]: Start isEmpty. Operand 91611 states and 147806 transitions. [2022-07-22 20:46:57,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-07-22 20:46:57,835 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:46:57,836 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:46:57,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-22 20:46:57,836 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:46:57,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:46:57,836 INFO L85 PathProgramCache]: Analyzing trace with hash -747773944, now seen corresponding path program 1 times [2022-07-22 20:46:57,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:46:57,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002726504] [2022-07-22 20:46:57,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:46:57,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:46:57,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:46:57,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:46:57,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:46:57,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-22 20:46:57,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:46:57,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-22 20:46:57,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:46:57,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-07-22 20:46:57,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:46:57,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-07-22 20:46:57,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:46:57,980 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 20:46:57,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:46:57,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002726504] [2022-07-22 20:46:57,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002726504] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:46:57,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:46:57,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:46:57,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113744736] [2022-07-22 20:46:57,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:46:57,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:46:57,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:46:57,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:46:57,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:46:57,982 INFO L87 Difference]: Start difference. First operand 91611 states and 147806 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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)