./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.03.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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.03.cil-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a0f469ae37a514ddca8d0dce53a0af7478c9ef70fff43265912fb6cefbfb3984 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 21:07:11,126 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 21:07:11,131 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 21:07:11,181 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 21:07:11,181 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 21:07:11,183 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 21:07:11,184 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 21:07:11,186 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 21:07:11,188 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 21:07:11,192 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 21:07:11,193 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 21:07:11,195 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 21:07:11,195 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 21:07:11,197 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 21:07:11,198 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 21:07:11,200 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 21:07:11,201 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 21:07:11,202 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 21:07:11,204 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 21:07:11,209 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 21:07:11,210 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 21:07:11,211 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 21:07:11,212 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 21:07:11,213 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 21:07:11,214 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 21:07:11,221 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 21:07:11,221 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 21:07:11,221 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 21:07:11,222 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 21:07:11,223 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 21:07:11,224 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 21:07:11,224 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 21:07:11,226 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 21:07:11,226 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 21:07:11,227 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 21:07:11,228 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 21:07:11,228 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 21:07:11,229 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 21:07:11,229 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 21:07:11,229 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 21:07:11,230 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 21:07:11,231 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 21:07:11,233 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 21:07:11,260 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 21:07:11,261 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 21:07:11,261 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 21:07:11,261 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 21:07:11,262 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 21:07:11,262 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 21:07:11,263 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 21:07:11,263 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 21:07:11,263 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 21:07:11,264 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 21:07:11,264 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 21:07:11,264 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 21:07:11,265 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 21:07:11,265 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 21:07:11,265 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 21:07:11,265 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 21:07:11,266 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 21:07:11,266 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 21:07:11,266 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 21:07:11,267 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 21:07:11,267 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 21:07:11,268 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 21:07:11,268 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 21:07:11,268 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 21:07:11,268 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 21:07:11,268 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 21:07:11,269 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 21:07:11,269 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 21:07:11,269 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 21:07:11,269 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 21:07:11,270 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 21:07:11,270 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 21:07:11,270 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 21:07:11,270 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0f469ae37a514ddca8d0dce53a0af7478c9ef70fff43265912fb6cefbfb3984 [2022-07-13 21:07:11,507 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 21:07:11,530 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 21:07:11,533 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 21:07:11,534 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 21:07:11,534 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 21:07:11,535 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.03.cil-2.c [2022-07-13 21:07:11,597 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da0bceef0/f76c2d5ea802421f88e4bab09c3294a6/FLAGcfc07ad65 [2022-07-13 21:07:12,004 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 21:07:12,005 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.03.cil-2.c [2022-07-13 21:07:12,014 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da0bceef0/f76c2d5ea802421f88e4bab09c3294a6/FLAGcfc07ad65 [2022-07-13 21:07:12,407 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da0bceef0/f76c2d5ea802421f88e4bab09c3294a6 [2022-07-13 21:07:12,409 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 21:07:12,411 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 21:07:12,412 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 21:07:12,412 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 21:07:12,417 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 21:07:12,417 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:07:12" (1/1) ... [2022-07-13 21:07:12,418 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58cd2cc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:07:12, skipping insertion in model container [2022-07-13 21:07:12,418 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:07:12" (1/1) ... [2022-07-13 21:07:12,424 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 21:07:12,459 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 21:07:12,617 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.03.cil-2.c[913,926] [2022-07-13 21:07:12,672 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.03.cil-2.c[5977,5990] [2022-07-13 21:07:12,705 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 21:07:12,719 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 21:07:12,728 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.03.cil-2.c[913,926] [2022-07-13 21:07:12,742 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.03.cil-2.c[5977,5990] [2022-07-13 21:07:12,765 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 21:07:12,779 INFO L208 MainTranslator]: Completed translation [2022-07-13 21:07:12,780 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:07:12 WrapperNode [2022-07-13 21:07:12,780 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 21:07:12,781 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 21:07:12,781 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 21:07:12,781 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 21:07:12,787 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:07:12" (1/1) ... [2022-07-13 21:07:12,796 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:07:12" (1/1) ... [2022-07-13 21:07:12,822 INFO L137 Inliner]: procedures = 54, calls = 57, calls flagged for inlining = 29, calls inlined = 29, statements flattened = 533 [2022-07-13 21:07:12,823 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 21:07:12,824 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 21:07:12,824 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 21:07:12,824 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 21:07:12,831 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:07:12" (1/1) ... [2022-07-13 21:07:12,831 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:07:12" (1/1) ... [2022-07-13 21:07:12,835 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:07:12" (1/1) ... [2022-07-13 21:07:12,835 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:07:12" (1/1) ... [2022-07-13 21:07:12,842 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:07:12" (1/1) ... [2022-07-13 21:07:12,862 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:07:12" (1/1) ... [2022-07-13 21:07:12,865 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:07:12" (1/1) ... [2022-07-13 21:07:12,875 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 21:07:12,876 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 21:07:12,891 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 21:07:12,891 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 21:07:12,892 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:07:12" (1/1) ... [2022-07-13 21:07:12,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 21:07:12,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:07:12,916 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) [2022-07-13 21:07:12,918 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 [2022-07-13 21:07:12,950 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 21:07:12,950 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-07-13 21:07:12,950 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-07-13 21:07:12,950 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2022-07-13 21:07:12,950 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2022-07-13 21:07:12,951 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-07-13 21:07:12,951 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-07-13 21:07:12,951 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-07-13 21:07:12,951 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-07-13 21:07:12,951 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-07-13 21:07:12,951 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-07-13 21:07:12,952 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-07-13 21:07:12,953 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-07-13 21:07:12,953 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-07-13 21:07:12,953 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-07-13 21:07:12,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 21:07:12,953 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-07-13 21:07:12,953 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-07-13 21:07:12,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 21:07:12,954 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 21:07:12,954 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-07-13 21:07:12,954 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-07-13 21:07:13,051 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 21:07:13,053 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 21:07:13,436 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 21:07:13,444 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 21:07:13,445 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2022-07-13 21:07:13,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:07:13 BoogieIcfgContainer [2022-07-13 21:07:13,447 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 21:07:13,449 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 21:07:13,449 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 21:07:13,452 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 21:07:13,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 09:07:12" (1/3) ... [2022-07-13 21:07:13,453 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36ef99b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:07:13, skipping insertion in model container [2022-07-13 21:07:13,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:07:12" (2/3) ... [2022-07-13 21:07:13,454 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36ef99b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:07:13, skipping insertion in model container [2022-07-13 21:07:13,454 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:07:13" (3/3) ... [2022-07-13 21:07:13,455 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.03.cil-2.c [2022-07-13 21:07:13,468 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 21:07:13,468 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-13 21:07:13,514 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:07:13,519 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@10ccc249, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@309bbb98 [2022-07-13 21:07:13,520 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 21:07:13,524 INFO L276 IsEmpty]: Start isEmpty. Operand has 229 states, 194 states have (on average 1.5824742268041236) internal successors, (307), 199 states have internal predecessors, (307), 23 states have call successors, (23), 9 states have call predecessors, (23), 9 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2022-07-13 21:07:13,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-13 21:07:13,533 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:07:13,534 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] [2022-07-13 21:07:13,534 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:07:13,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:07:13,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1071236690, now seen corresponding path program 1 times [2022-07-13 21:07:13,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:07:13,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072966680] [2022-07-13 21:07:13,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:07:13,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:07:13,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:13,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 21:07:13,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:13,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-13 21:07:13,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:13,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:07:13,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:07:13,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072966680] [2022-07-13 21:07:13,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072966680] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:07:13,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:07:13,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 21:07:13,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583491991] [2022-07-13 21:07:13,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:07:13,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 21:07:13,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:07:13,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 21:07:13,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 21:07:13,899 INFO L87 Difference]: Start difference. First operand has 229 states, 194 states have (on average 1.5824742268041236) internal successors, (307), 199 states have internal predecessors, (307), 23 states have call successors, (23), 9 states have call predecessors, (23), 9 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) 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) [2022-07-13 21:07:14,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:07:14,157 INFO L93 Difference]: Finished difference Result 512 states and 792 transitions. [2022-07-13 21:07:14,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 21:07:14,161 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 [2022-07-13 21:07:14,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:07:14,177 INFO L225 Difference]: With dead ends: 512 [2022-07-13 21:07:14,177 INFO L226 Difference]: Without dead ends: 289 [2022-07-13 21:07:14,184 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 [2022-07-13 21:07:14,187 INFO L413 NwaCegarLoop]: 345 mSDtfsCounter, 404 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 21:07:14,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [421 Valid, 589 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 21:07:14,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-07-13 21:07:14,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 283. [2022-07-13 21:07:14,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 243 states have (on average 1.448559670781893) internal successors, (352), 247 states have internal predecessors, (352), 27 states have call successors, (27), 11 states have call predecessors, (27), 11 states have return successors, (31), 25 states have call predecessors, (31), 25 states have call successors, (31) [2022-07-13 21:07:14,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 410 transitions. [2022-07-13 21:07:14,254 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 410 transitions. Word has length 44 [2022-07-13 21:07:14,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:07:14,255 INFO L495 AbstractCegarLoop]: Abstraction has 283 states and 410 transitions. [2022-07-13 21:07:14,255 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) [2022-07-13 21:07:14,255 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 410 transitions. [2022-07-13 21:07:14,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-13 21:07:14,258 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:07:14,258 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] [2022-07-13 21:07:14,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 21:07:14,259 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:07:14,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:07:14,260 INFO L85 PathProgramCache]: Analyzing trace with hash -617941460, now seen corresponding path program 1 times [2022-07-13 21:07:14,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:07:14,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975726843] [2022-07-13 21:07:14,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:07:14,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:07:14,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:14,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 21:07:14,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:14,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-13 21:07:14,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:14,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:07:14,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:07:14,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975726843] [2022-07-13 21:07:14,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975726843] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:07:14,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:07:14,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 21:07:14,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749753267] [2022-07-13 21:07:14,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:07:14,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 21:07:14,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:07:14,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 21:07:14,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 21:07:14,360 INFO L87 Difference]: Start difference. First operand 283 states and 410 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) [2022-07-13 21:07:14,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:07:14,623 INFO L93 Difference]: Finished difference Result 531 states and 750 transitions. [2022-07-13 21:07:14,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 21:07:14,629 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 [2022-07-13 21:07:14,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:07:14,635 INFO L225 Difference]: With dead ends: 531 [2022-07-13 21:07:14,635 INFO L226 Difference]: Without dead ends: 407 [2022-07-13 21:07:14,639 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 [2022-07-13 21:07:14,640 INFO L413 NwaCegarLoop]: 365 mSDtfsCounter, 188 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 21:07:14,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 728 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 21:07:14,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-07-13 21:07:14,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 350. [2022-07-13 21:07:14,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 304 states have (on average 1.4342105263157894) internal successors, (436), 308 states have internal predecessors, (436), 30 states have call successors, (30), 14 states have call predecessors, (30), 14 states have return successors, (34), 28 states have call predecessors, (34), 28 states have call successors, (34) [2022-07-13 21:07:14,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 500 transitions. [2022-07-13 21:07:14,677 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 500 transitions. Word has length 45 [2022-07-13 21:07:14,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:07:14,677 INFO L495 AbstractCegarLoop]: Abstraction has 350 states and 500 transitions. [2022-07-13 21:07:14,677 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) [2022-07-13 21:07:14,678 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 500 transitions. [2022-07-13 21:07:14,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-13 21:07:14,680 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:07:14,680 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] [2022-07-13 21:07:14,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 21:07:14,681 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:07:14,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:07:14,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1902298921, now seen corresponding path program 1 times [2022-07-13 21:07:14,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:07:14,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618484255] [2022-07-13 21:07:14,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:07:14,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:07:14,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:14,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 21:07:14,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:14,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-13 21:07:14,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:14,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:07:14,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:07:14,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618484255] [2022-07-13 21:07:14,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618484255] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:07:14,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:07:14,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 21:07:14,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240874564] [2022-07-13 21:07:14,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:07:14,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 21:07:14,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:07:14,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 21:07:14,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 21:07:14,736 INFO L87 Difference]: Start difference. First operand 350 states and 500 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) [2022-07-13 21:07:14,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:07:14,878 INFO L93 Difference]: Finished difference Result 758 states and 1059 transitions. [2022-07-13 21:07:14,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 21:07:14,879 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 [2022-07-13 21:07:14,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:07:14,884 INFO L225 Difference]: With dead ends: 758 [2022-07-13 21:07:14,884 INFO L226 Difference]: Without dead ends: 567 [2022-07-13 21:07:14,889 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 [2022-07-13 21:07:14,892 INFO L413 NwaCegarLoop]: 340 mSDtfsCounter, 413 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 21:07:14,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [430 Valid, 582 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 21:07:14,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2022-07-13 21:07:14,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 515. [2022-07-13 21:07:14,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 450 states have (on average 1.3911111111111112) internal successors, (626), 457 states have internal predecessors, (626), 41 states have call successors, (41), 21 states have call predecessors, (41), 22 states have return successors, (51), 37 states have call predecessors, (51), 39 states have call successors, (51) [2022-07-13 21:07:14,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 718 transitions. [2022-07-13 21:07:14,931 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 718 transitions. Word has length 45 [2022-07-13 21:07:14,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:07:14,932 INFO L495 AbstractCegarLoop]: Abstraction has 515 states and 718 transitions. [2022-07-13 21:07:14,932 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) [2022-07-13 21:07:14,932 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 718 transitions. [2022-07-13 21:07:14,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-13 21:07:14,935 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:07:14,935 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] [2022-07-13 21:07:14,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 21:07:14,936 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:07:14,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:07:14,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1972716290, now seen corresponding path program 1 times [2022-07-13 21:07:14,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:07:14,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759498077] [2022-07-13 21:07:14,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:07:14,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:07:14,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:14,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 21:07:14,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:14,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 21:07:14,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:15,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-13 21:07:15,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:15,009 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:07:15,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:07:15,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759498077] [2022-07-13 21:07:15,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759498077] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:07:15,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:07:15,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 21:07:15,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235662808] [2022-07-13 21:07:15,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:07:15,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 21:07:15,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:07:15,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 21:07:15,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 21:07:15,012 INFO L87 Difference]: Start difference. First operand 515 states and 718 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) [2022-07-13 21:07:15,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:07:15,213 INFO L93 Difference]: Finished difference Result 1099 states and 1503 transitions. [2022-07-13 21:07:15,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 21:07:15,214 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 [2022-07-13 21:07:15,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:07:15,218 INFO L225 Difference]: With dead ends: 1099 [2022-07-13 21:07:15,218 INFO L226 Difference]: Without dead ends: 743 [2022-07-13 21:07:15,219 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 [2022-07-13 21:07:15,220 INFO L413 NwaCegarLoop]: 389 mSDtfsCounter, 172 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 783 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 21:07:15,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 783 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 21:07:15,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2022-07-13 21:07:15,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 705. [2022-07-13 21:07:15,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 616 states have (on average 1.3409090909090908) internal successors, (826), 625 states have internal predecessors, (826), 55 states have call successors, (55), 29 states have call predecessors, (55), 32 states have return successors, (75), 51 states have call predecessors, (75), 53 states have call successors, (75) [2022-07-13 21:07:15,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 956 transitions. [2022-07-13 21:07:15,256 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 956 transitions. Word has length 62 [2022-07-13 21:07:15,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:07:15,256 INFO L495 AbstractCegarLoop]: Abstraction has 705 states and 956 transitions. [2022-07-13 21:07:15,256 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) [2022-07-13 21:07:15,257 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 956 transitions. [2022-07-13 21:07:15,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-13 21:07:15,259 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:07:15,260 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] [2022-07-13 21:07:15,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 21:07:15,260 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:07:15,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:07:15,261 INFO L85 PathProgramCache]: Analyzing trace with hash -785609067, now seen corresponding path program 1 times [2022-07-13 21:07:15,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:07:15,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487274289] [2022-07-13 21:07:15,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:07:15,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:07:15,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:15,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 21:07:15,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:15,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 21:07:15,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:15,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-13 21:07:15,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:15,309 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-13 21:07:15,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:07:15,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487274289] [2022-07-13 21:07:15,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487274289] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:07:15,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:07:15,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 21:07:15,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834828180] [2022-07-13 21:07:15,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:07:15,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 21:07:15,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:07:15,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 21:07:15,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 21:07:15,312 INFO L87 Difference]: Start difference. First operand 705 states and 956 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) [2022-07-13 21:07:15,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:07:15,444 INFO L93 Difference]: Finished difference Result 1358 states and 1809 transitions. [2022-07-13 21:07:15,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 21:07:15,445 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 [2022-07-13 21:07:15,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:07:15,450 INFO L225 Difference]: With dead ends: 1358 [2022-07-13 21:07:15,450 INFO L226 Difference]: Without dead ends: 904 [2022-07-13 21:07:15,451 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 [2022-07-13 21:07:15,452 INFO L413 NwaCegarLoop]: 335 mSDtfsCounter, 400 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 21:07:15,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [417 Valid, 579 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 21:07:15,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2022-07-13 21:07:15,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 849. [2022-07-13 21:07:15,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 849 states, 744 states have (on average 1.3131720430107527) internal successors, (977), 755 states have internal predecessors, (977), 63 states have call successors, (63), 35 states have call predecessors, (63), 40 states have return successors, (89), 59 states have call predecessors, (89), 61 states have call successors, (89) [2022-07-13 21:07:15,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 1129 transitions. [2022-07-13 21:07:15,492 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 1129 transitions. Word has length 67 [2022-07-13 21:07:15,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:07:15,493 INFO L495 AbstractCegarLoop]: Abstraction has 849 states and 1129 transitions. [2022-07-13 21:07:15,493 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) [2022-07-13 21:07:15,493 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 1129 transitions. [2022-07-13 21:07:15,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-13 21:07:15,496 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:07:15,496 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] [2022-07-13 21:07:15,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 21:07:15,496 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:07:15,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:07:15,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1619896469, now seen corresponding path program 1 times [2022-07-13 21:07:15,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:07:15,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139449226] [2022-07-13 21:07:15,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:07:15,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:07:15,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:15,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 21:07:15,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:15,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-13 21:07:15,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:15,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-13 21:07:15,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:15,598 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 21:07:15,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:07:15,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139449226] [2022-07-13 21:07:15,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139449226] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:07:15,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338382632] [2022-07-13 21:07:15,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:07:15,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:07:15,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:07:15,602 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) [2022-07-13 21:07:15,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 21:07:15,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:15,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-13 21:07:15,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:07:15,822 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:07:15,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:07:15,881 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-13 21:07:15,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338382632] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-13 21:07:15,882 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-13 21:07:15,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 8 [2022-07-13 21:07:15,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731626480] [2022-07-13 21:07:15,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:07:15,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 21:07:15,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:07:15,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 21:07:15,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-13 21:07:15,884 INFO L87 Difference]: Start difference. First operand 849 states and 1129 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) [2022-07-13 21:07:16,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:07:16,007 INFO L93 Difference]: Finished difference Result 905 states and 1197 transitions. [2022-07-13 21:07:16,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 21:07:16,008 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 [2022-07-13 21:07:16,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:07:16,013 INFO L225 Difference]: With dead ends: 905 [2022-07-13 21:07:16,013 INFO L226 Difference]: Without dead ends: 902 [2022-07-13 21:07:16,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-13 21:07:16,020 INFO L413 NwaCegarLoop]: 344 mSDtfsCounter, 557 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 557 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 21:07:16,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [557 Valid, 411 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 21:07:16,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 902 states. [2022-07-13 21:07:16,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 902 to 848. [2022-07-13 21:07:16,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 848 states, 744 states have (on average 1.310483870967742) internal successors, (975), 754 states have internal predecessors, (975), 62 states have call successors, (62), 35 states have call predecessors, (62), 40 states have return successors, (89), 59 states have call predecessors, (89), 61 states have call successors, (89) [2022-07-13 21:07:16,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 1126 transitions. [2022-07-13 21:07:16,067 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 1126 transitions. Word has length 68 [2022-07-13 21:07:16,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:07:16,069 INFO L495 AbstractCegarLoop]: Abstraction has 848 states and 1126 transitions. [2022-07-13 21:07:16,069 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) [2022-07-13 21:07:16,070 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 1126 transitions. [2022-07-13 21:07:16,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-13 21:07:16,072 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:07:16,073 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] [2022-07-13 21:07:16,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 21:07:16,296 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 [2022-07-13 21:07:16,296 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:07:16,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:07:16,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1323549800, now seen corresponding path program 1 times [2022-07-13 21:07:16,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:07:16,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019860648] [2022-07-13 21:07:16,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:07:16,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:07:16,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:16,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 21:07:16,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:16,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-13 21:07:16,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:16,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-13 21:07:16,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:16,389 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 21:07:16,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:07:16,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019860648] [2022-07-13 21:07:16,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019860648] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:07:16,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670585011] [2022-07-13 21:07:16,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:07:16,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:07:16,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:07:16,391 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) [2022-07-13 21:07:16,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 21:07:16,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:16,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-13 21:07:16,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:07:16,740 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:07:16,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:07:16,811 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-13 21:07:16,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670585011] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:07:16,811 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:07:16,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 11 [2022-07-13 21:07:16,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83153268] [2022-07-13 21:07:16,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:07:16,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-13 21:07:16,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:07:16,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-13 21:07:16,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-07-13 21:07:16,814 INFO L87 Difference]: Start difference. First operand 848 states and 1126 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) [2022-07-13 21:07:17,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:07:17,996 INFO L93 Difference]: Finished difference Result 2548 states and 3346 transitions. [2022-07-13 21:07:17,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-13 21:07:17,997 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 [2022-07-13 21:07:17,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:07:18,022 INFO L225 Difference]: With dead ends: 2548 [2022-07-13 21:07:18,023 INFO L226 Difference]: Without dead ends: 2004 [2022-07-13 21:07:18,025 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 [2022-07-13 21:07:18,026 INFO L413 NwaCegarLoop]: 449 mSDtfsCounter, 972 mSDsluCounter, 2088 mSDsCounter, 0 mSdLazyCounter, 1121 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 996 SdHoareTripleChecker+Valid, 2537 SdHoareTripleChecker+Invalid, 1197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-13 21:07:18,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [996 Valid, 2537 Invalid, 1197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1121 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-13 21:07:18,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2004 states. [2022-07-13 21:07:18,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2004 to 1237. [2022-07-13 21:07:18,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1237 states, 1094 states have (on average 1.2879341864716636) internal successors, (1409), 1112 states have internal predecessors, (1409), 82 states have call successors, (82), 49 states have call predecessors, (82), 59 states have return successors, (123), 76 states have call predecessors, (123), 81 states have call successors, (123) [2022-07-13 21:07:18,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1237 states to 1237 states and 1614 transitions. [2022-07-13 21:07:18,091 INFO L78 Accepts]: Start accepts. Automaton has 1237 states and 1614 transitions. Word has length 69 [2022-07-13 21:07:18,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:07:18,092 INFO L495 AbstractCegarLoop]: Abstraction has 1237 states and 1614 transitions. [2022-07-13 21:07:18,092 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) [2022-07-13 21:07:18,092 INFO L276 IsEmpty]: Start isEmpty. Operand 1237 states and 1614 transitions. [2022-07-13 21:07:18,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-13 21:07:18,095 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:07:18,096 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] [2022-07-13 21:07:18,122 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-13 21:07:18,311 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 [2022-07-13 21:07:18,312 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:07:18,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:07:18,312 INFO L85 PathProgramCache]: Analyzing trace with hash -931355791, now seen corresponding path program 1 times [2022-07-13 21:07:18,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:07:18,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391810241] [2022-07-13 21:07:18,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:07:18,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:07:18,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:18,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:07:18,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:18,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 21:07:18,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:18,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-13 21:07:18,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:18,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-13 21:07:18,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:18,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-13 21:07:18,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:18,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:07:18,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:07:18,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391810241] [2022-07-13 21:07:18,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391810241] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:07:18,386 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:07:18,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 21:07:18,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854241698] [2022-07-13 21:07:18,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:07:18,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 21:07:18,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:07:18,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 21:07:18,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-13 21:07:18,388 INFO L87 Difference]: Start difference. First operand 1237 states and 1614 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 21:07:19,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:07:19,238 INFO L93 Difference]: Finished difference Result 1605 states and 2181 transitions. [2022-07-13 21:07:19,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 21:07:19,239 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2022-07-13 21:07:19,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:07:19,245 INFO L225 Difference]: With dead ends: 1605 [2022-07-13 21:07:19,245 INFO L226 Difference]: Without dead ends: 1464 [2022-07-13 21:07:19,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-07-13 21:07:19,246 INFO L413 NwaCegarLoop]: 346 mSDtfsCounter, 663 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 677 SdHoareTripleChecker+Valid, 884 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-13 21:07:19,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [677 Valid, 884 Invalid, 842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 752 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-13 21:07:19,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2022-07-13 21:07:19,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1379. [2022-07-13 21:07:19,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1379 states, 1217 states have (on average 1.3114215283483976) internal successors, (1596), 1236 states have internal predecessors, (1596), 94 states have call successors, (94), 55 states have call predecessors, (94), 66 states have return successors, (138), 88 states have call predecessors, (138), 93 states have call successors, (138) [2022-07-13 21:07:19,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1379 states to 1379 states and 1828 transitions. [2022-07-13 21:07:19,324 INFO L78 Accepts]: Start accepts. Automaton has 1379 states and 1828 transitions. Word has length 79 [2022-07-13 21:07:19,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:07:19,325 INFO L495 AbstractCegarLoop]: Abstraction has 1379 states and 1828 transitions. [2022-07-13 21:07:19,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 21:07:19,325 INFO L276 IsEmpty]: Start isEmpty. Operand 1379 states and 1828 transitions. [2022-07-13 21:07:19,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-13 21:07:19,328 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:07:19,328 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:07:19,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-13 21:07:19,329 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:07:19,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:07:19,330 INFO L85 PathProgramCache]: Analyzing trace with hash -694307595, now seen corresponding path program 1 times [2022-07-13 21:07:19,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:07:19,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196029800] [2022-07-13 21:07:19,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:07:19,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:07:19,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:19,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:07:19,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:19,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 21:07:19,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:19,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-13 21:07:19,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:19,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-13 21:07:19,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:19,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-13 21:07:19,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:19,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:07:19,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:07:19,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196029800] [2022-07-13 21:07:19,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196029800] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:07:19,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:07:19,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 21:07:19,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158688489] [2022-07-13 21:07:19,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:07:19,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 21:07:19,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:07:19,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 21:07:19,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:07:19,406 INFO L87 Difference]: Start difference. First operand 1379 states and 1828 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 21:07:20,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:07:20,548 INFO L93 Difference]: Finished difference Result 1933 states and 2674 transitions. [2022-07-13 21:07:20,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-13 21:07:20,552 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2022-07-13 21:07:20,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:07:20,560 INFO L225 Difference]: With dead ends: 1933 [2022-07-13 21:07:20,560 INFO L226 Difference]: Without dead ends: 1650 [2022-07-13 21:07:20,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-13 21:07:20,564 INFO L413 NwaCegarLoop]: 447 mSDtfsCounter, 661 mSDsluCounter, 935 mSDsCounter, 0 mSdLazyCounter, 1173 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 675 SdHoareTripleChecker+Valid, 1382 SdHoareTripleChecker+Invalid, 1245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-13 21:07:20,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [675 Valid, 1382 Invalid, 1245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1173 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-13 21:07:20,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1650 states. [2022-07-13 21:07:20,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1650 to 1512. [2022-07-13 21:07:20,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1512 states, 1331 states have (on average 1.3260706235912847) internal successors, (1765), 1351 states have internal predecessors, (1765), 106 states have call successors, (106), 61 states have call predecessors, (106), 73 states have return successors, (152), 101 states have call predecessors, (152), 105 states have call successors, (152) [2022-07-13 21:07:20,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 2023 transitions. [2022-07-13 21:07:20,648 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 2023 transitions. Word has length 79 [2022-07-13 21:07:20,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:07:20,649 INFO L495 AbstractCegarLoop]: Abstraction has 1512 states and 2023 transitions. [2022-07-13 21:07:20,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 21:07:20,649 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 2023 transitions. [2022-07-13 21:07:20,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-13 21:07:20,655 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:07:20,655 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] [2022-07-13 21:07:20,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-13 21:07:20,656 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:07:20,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:07:20,656 INFO L85 PathProgramCache]: Analyzing trace with hash -748700493, now seen corresponding path program 1 times [2022-07-13 21:07:20,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:07:20,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379333436] [2022-07-13 21:07:20,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:07:20,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:07:20,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:20,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:07:20,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:20,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 21:07:20,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:20,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-13 21:07:20,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:20,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-13 21:07:20,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:20,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-13 21:07:20,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:20,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:07:20,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:07:20,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379333436] [2022-07-13 21:07:20,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379333436] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:07:20,732 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:07:20,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 21:07:20,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168734778] [2022-07-13 21:07:20,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:07:20,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 21:07:20,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:07:20,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 21:07:20,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:07:20,734 INFO L87 Difference]: Start difference. First operand 1512 states and 2023 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 21:07:21,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:07:21,322 INFO L93 Difference]: Finished difference Result 2066 states and 2875 transitions. [2022-07-13 21:07:21,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 21:07:21,323 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2022-07-13 21:07:21,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:07:21,330 INFO L225 Difference]: With dead ends: 2066 [2022-07-13 21:07:21,330 INFO L226 Difference]: Without dead ends: 1650 [2022-07-13 21:07:21,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-07-13 21:07:21,333 INFO L413 NwaCegarLoop]: 290 mSDtfsCounter, 544 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 860 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 21:07:21,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [559 Valid, 860 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-13 21:07:21,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1650 states. [2022-07-13 21:07:21,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1650 to 1512. [2022-07-13 21:07:21,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1512 states, 1331 states have (on average 1.32381667918858) internal successors, (1762), 1351 states have internal predecessors, (1762), 106 states have call successors, (106), 61 states have call predecessors, (106), 73 states have return successors, (152), 101 states have call predecessors, (152), 105 states have call successors, (152) [2022-07-13 21:07:21,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 2020 transitions. [2022-07-13 21:07:21,438 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 2020 transitions. Word has length 79 [2022-07-13 21:07:21,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:07:21,439 INFO L495 AbstractCegarLoop]: Abstraction has 1512 states and 2020 transitions. [2022-07-13 21:07:21,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 21:07:21,439 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 2020 transitions. [2022-07-13 21:07:21,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-13 21:07:21,442 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:07:21,442 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] [2022-07-13 21:07:21,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-13 21:07:21,443 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:07:21,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:07:21,443 INFO L85 PathProgramCache]: Analyzing trace with hash -69428239, now seen corresponding path program 1 times [2022-07-13 21:07:21,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:07:21,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116904566] [2022-07-13 21:07:21,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:07:21,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:07:21,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:21,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:07:21,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:21,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 21:07:21,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:21,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-13 21:07:21,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:21,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-13 21:07:21,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:21,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-13 21:07:21,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:21,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:07:21,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:07:21,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116904566] [2022-07-13 21:07:21,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116904566] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:07:21,517 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:07:21,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 21:07:21,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610738300] [2022-07-13 21:07:21,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:07:21,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 21:07:21,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:07:21,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 21:07:21,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:07:21,519 INFO L87 Difference]: Start difference. First operand 1512 states and 2020 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 21:07:22,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:07:22,059 INFO L93 Difference]: Finished difference Result 2062 states and 2858 transitions. [2022-07-13 21:07:22,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 21:07:22,059 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2022-07-13 21:07:22,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:07:22,066 INFO L225 Difference]: With dead ends: 2062 [2022-07-13 21:07:22,066 INFO L226 Difference]: Without dead ends: 1646 [2022-07-13 21:07:22,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-07-13 21:07:22,069 INFO L413 NwaCegarLoop]: 296 mSDtfsCounter, 609 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 624 SdHoareTripleChecker+Valid, 733 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 21:07:22,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [624 Valid, 733 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-13 21:07:22,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1646 states. [2022-07-13 21:07:22,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1646 to 1512. [2022-07-13 21:07:22,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1512 states, 1331 states have (on average 1.3215627347858754) internal successors, (1759), 1351 states have internal predecessors, (1759), 106 states have call successors, (106), 61 states have call predecessors, (106), 73 states have return successors, (152), 101 states have call predecessors, (152), 105 states have call successors, (152) [2022-07-13 21:07:22,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 2017 transitions. [2022-07-13 21:07:22,154 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 2017 transitions. Word has length 79 [2022-07-13 21:07:22,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:07:22,154 INFO L495 AbstractCegarLoop]: Abstraction has 1512 states and 2017 transitions. [2022-07-13 21:07:22,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 21:07:22,155 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 2017 transitions. [2022-07-13 21:07:22,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-13 21:07:22,158 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:07:22,158 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] [2022-07-13 21:07:22,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-13 21:07:22,158 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:07:22,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:07:22,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1892146419, now seen corresponding path program 1 times [2022-07-13 21:07:22,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:07:22,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816080902] [2022-07-13 21:07:22,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:07:22,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:07:22,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:22,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:07:22,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:22,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 21:07:22,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:22,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-13 21:07:22,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:22,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-13 21:07:22,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:22,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-13 21:07:22,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:22,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:07:22,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:07:22,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816080902] [2022-07-13 21:07:22,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816080902] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:07:22,235 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:07:22,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 21:07:22,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027668641] [2022-07-13 21:07:22,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:07:22,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 21:07:22,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:07:22,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 21:07:22,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:07:22,237 INFO L87 Difference]: Start difference. First operand 1512 states and 2017 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 21:07:23,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:07:23,239 INFO L93 Difference]: Finished difference Result 2484 states and 3469 transitions. [2022-07-13 21:07:23,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-13 21:07:23,240 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2022-07-13 21:07:23,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:07:23,248 INFO L225 Difference]: With dead ends: 2484 [2022-07-13 21:07:23,248 INFO L226 Difference]: Without dead ends: 2068 [2022-07-13 21:07:23,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-07-13 21:07:23,250 INFO L413 NwaCegarLoop]: 464 mSDtfsCounter, 663 mSDsluCounter, 924 mSDsCounter, 0 mSdLazyCounter, 1260 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 676 SdHoareTripleChecker+Valid, 1388 SdHoareTripleChecker+Invalid, 1336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-13 21:07:23,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [676 Valid, 1388 Invalid, 1336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1260 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-13 21:07:23,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2068 states. [2022-07-13 21:07:23,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2068 to 1772. [2022-07-13 21:07:23,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1772 states, 1555 states have (on average 1.342765273311897) internal successors, (2088), 1577 states have internal predecessors, (2088), 128 states have call successors, (128), 73 states have call predecessors, (128), 87 states have return successors, (182), 125 states have call predecessors, (182), 127 states have call successors, (182) [2022-07-13 21:07:23,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1772 states to 1772 states and 2398 transitions. [2022-07-13 21:07:23,346 INFO L78 Accepts]: Start accepts. Automaton has 1772 states and 2398 transitions. Word has length 79 [2022-07-13 21:07:23,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:07:23,346 INFO L495 AbstractCegarLoop]: Abstraction has 1772 states and 2398 transitions. [2022-07-13 21:07:23,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 21:07:23,347 INFO L276 IsEmpty]: Start isEmpty. Operand 1772 states and 2398 transitions. [2022-07-13 21:07:23,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-13 21:07:23,350 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:07:23,350 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] [2022-07-13 21:07:23,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-13 21:07:23,350 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:07:23,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:07:23,351 INFO L85 PathProgramCache]: Analyzing trace with hash 2093970353, now seen corresponding path program 1 times [2022-07-13 21:07:23,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:07:23,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790140896] [2022-07-13 21:07:23,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:07:23,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:07:23,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:23,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:07:23,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:23,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 21:07:23,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:23,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-13 21:07:23,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:23,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-13 21:07:23,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:23,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-13 21:07:23,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:23,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:07:23,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:07:23,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790140896] [2022-07-13 21:07:23,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790140896] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:07:23,427 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:07:23,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 21:07:23,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283897882] [2022-07-13 21:07:23,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:07:23,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 21:07:23,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:07:23,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 21:07:23,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:07:23,433 INFO L87 Difference]: Start difference. First operand 1772 states and 2398 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 21:07:24,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:07:24,517 INFO L93 Difference]: Finished difference Result 3400 states and 4812 transitions. [2022-07-13 21:07:24,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-13 21:07:24,517 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2022-07-13 21:07:24,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:07:24,528 INFO L225 Difference]: With dead ends: 3400 [2022-07-13 21:07:24,529 INFO L226 Difference]: Without dead ends: 2724 [2022-07-13 21:07:24,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-07-13 21:07:24,532 INFO L413 NwaCegarLoop]: 416 mSDtfsCounter, 697 mSDsluCounter, 927 mSDsCounter, 0 mSdLazyCounter, 1109 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 715 SdHoareTripleChecker+Valid, 1343 SdHoareTripleChecker+Invalid, 1188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-13 21:07:24,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [715 Valid, 1343 Invalid, 1188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1109 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-13 21:07:24,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2724 states. [2022-07-13 21:07:24,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2724 to 2293. [2022-07-13 21:07:24,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2293 states, 2006 states have (on average 1.3708873379860418) internal successors, (2750), 2032 states have internal predecessors, (2750), 170 states have call successors, (170), 97 states have call predecessors, (170), 115 states have return successors, (246), 171 states have call predecessors, (246), 169 states have call successors, (246) [2022-07-13 21:07:24,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2293 states to 2293 states and 3166 transitions. [2022-07-13 21:07:24,666 INFO L78 Accepts]: Start accepts. Automaton has 2293 states and 3166 transitions. Word has length 79 [2022-07-13 21:07:24,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:07:24,666 INFO L495 AbstractCegarLoop]: Abstraction has 2293 states and 3166 transitions. [2022-07-13 21:07:24,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 21:07:24,667 INFO L276 IsEmpty]: Start isEmpty. Operand 2293 states and 3166 transitions. [2022-07-13 21:07:24,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-13 21:07:24,671 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:07:24,672 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] [2022-07-13 21:07:24,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-13 21:07:24,672 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:07:24,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:07:24,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1640297165, now seen corresponding path program 1 times [2022-07-13 21:07:24,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:07:24,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476738567] [2022-07-13 21:07:24,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:07:24,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:07:24,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:24,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:07:24,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:24,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 21:07:24,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:24,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-13 21:07:24,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:24,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-13 21:07:24,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:24,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-13 21:07:24,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:24,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:07:24,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:07:24,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476738567] [2022-07-13 21:07:24,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476738567] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:07:24,753 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:07:24,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 21:07:24,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305388175] [2022-07-13 21:07:24,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:07:24,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 21:07:24,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:07:24,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 21:07:24,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:07:24,756 INFO L87 Difference]: Start difference. First operand 2293 states and 3166 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 21:07:25,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:07:25,318 INFO L93 Difference]: Finished difference Result 3794 states and 5413 transitions. [2022-07-13 21:07:25,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 21:07:25,319 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2022-07-13 21:07:25,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:07:25,332 INFO L225 Difference]: With dead ends: 3794 [2022-07-13 21:07:25,332 INFO L226 Difference]: Without dead ends: 2597 [2022-07-13 21:07:25,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-07-13 21:07:25,337 INFO L413 NwaCegarLoop]: 287 mSDtfsCounter, 609 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 624 SdHoareTripleChecker+Valid, 724 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 21:07:25,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [624 Valid, 724 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-13 21:07:25,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2597 states. [2022-07-13 21:07:25,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2597 to 2293. [2022-07-13 21:07:25,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2293 states, 2006 states have (on average 1.3664007976071784) internal successors, (2741), 2032 states have internal predecessors, (2741), 170 states have call successors, (170), 97 states have call predecessors, (170), 115 states have return successors, (246), 171 states have call predecessors, (246), 169 states have call successors, (246) [2022-07-13 21:07:25,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2293 states to 2293 states and 3157 transitions. [2022-07-13 21:07:25,482 INFO L78 Accepts]: Start accepts. Automaton has 2293 states and 3157 transitions. Word has length 79 [2022-07-13 21:07:25,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:07:25,482 INFO L495 AbstractCegarLoop]: Abstraction has 2293 states and 3157 transitions. [2022-07-13 21:07:25,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 21:07:25,483 INFO L276 IsEmpty]: Start isEmpty. Operand 2293 states and 3157 transitions. [2022-07-13 21:07:25,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-13 21:07:25,486 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:07:25,487 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] [2022-07-13 21:07:25,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-13 21:07:25,487 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:07:25,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:07:25,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1206568079, now seen corresponding path program 1 times [2022-07-13 21:07:25,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:07:25,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535622738] [2022-07-13 21:07:25,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:07:25,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:07:25,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:25,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:07:25,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:25,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 21:07:25,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:25,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-13 21:07:25,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:25,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-13 21:07:25,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:25,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-13 21:07:25,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:25,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:07:25,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:07:25,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535622738] [2022-07-13 21:07:25,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535622738] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:07:25,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:07:25,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 21:07:25,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529055300] [2022-07-13 21:07:25,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:07:25,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 21:07:25,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:07:25,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 21:07:25,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-13 21:07:25,565 INFO L87 Difference]: Start difference. First operand 2293 states and 3157 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 21:07:26,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:07:26,498 INFO L93 Difference]: Finished difference Result 4604 states and 6587 transitions. [2022-07-13 21:07:26,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 21:07:26,499 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2022-07-13 21:07:26,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:07:26,515 INFO L225 Difference]: With dead ends: 4604 [2022-07-13 21:07:26,515 INFO L226 Difference]: Without dead ends: 3408 [2022-07-13 21:07:26,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-07-13 21:07:26,523 INFO L413 NwaCegarLoop]: 515 mSDtfsCounter, 805 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 851 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 836 SdHoareTripleChecker+Valid, 1128 SdHoareTripleChecker+Invalid, 950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-13 21:07:26,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [836 Valid, 1128 Invalid, 950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 851 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-13 21:07:26,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3408 states. [2022-07-13 21:07:26,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3408 to 2949. [2022-07-13 21:07:26,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2949 states, 2569 states have (on average 1.38108213312573) internal successors, (3548), 2604 states have internal predecessors, (3548), 229 states have call successors, (229), 127 states have call predecessors, (229), 149 states have return successors, (315), 225 states have call predecessors, (315), 228 states have call successors, (315) [2022-07-13 21:07:26,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2949 states to 2949 states and 4092 transitions. [2022-07-13 21:07:26,722 INFO L78 Accepts]: Start accepts. Automaton has 2949 states and 4092 transitions. Word has length 79 [2022-07-13 21:07:26,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:07:26,723 INFO L495 AbstractCegarLoop]: Abstraction has 2949 states and 4092 transitions. [2022-07-13 21:07:26,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 21:07:26,723 INFO L276 IsEmpty]: Start isEmpty. Operand 2949 states and 4092 transitions. [2022-07-13 21:07:26,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-07-13 21:07:26,728 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:07:26,728 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] [2022-07-13 21:07:26,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-13 21:07:26,729 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:07:26,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:07:26,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1418533864, now seen corresponding path program 1 times [2022-07-13 21:07:26,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:07:26,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641439219] [2022-07-13 21:07:26,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:07:26,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:07:26,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:26,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 21:07:26,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:26,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-13 21:07:26,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:26,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-13 21:07:26,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:26,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-07-13 21:07:26,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:26,791 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-13 21:07:26,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:07:26,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641439219] [2022-07-13 21:07:26,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641439219] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:07:26,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758396048] [2022-07-13 21:07:26,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:07:26,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:07:26,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:07:26,796 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) [2022-07-13 21:07:26,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 21:07:26,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:26,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 21:07:26,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:07:26,911 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-13 21:07:26,912 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 21:07:26,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758396048] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:07:26,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 21:07:26,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-07-13 21:07:26,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504929519] [2022-07-13 21:07:26,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:07:26,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:07:26,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:07:26,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:07:26,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:07:26,915 INFO L87 Difference]: Start difference. First operand 2949 states and 4092 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) [2022-07-13 21:07:27,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:07:27,034 INFO L93 Difference]: Finished difference Result 3672 states and 5030 transitions. [2022-07-13 21:07:27,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:07:27,034 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 [2022-07-13 21:07:27,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:07:27,047 INFO L225 Difference]: With dead ends: 3672 [2022-07-13 21:07:27,048 INFO L226 Difference]: Without dead ends: 2827 [2022-07-13 21:07:27,051 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 [2022-07-13 21:07:27,052 INFO L413 NwaCegarLoop]: 347 mSDtfsCounter, 276 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 422 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 [2022-07-13 21:07:27,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 422 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 21:07:27,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2827 states. [2022-07-13 21:07:27,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2827 to 2812. [2022-07-13 21:07:27,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2812 states, 2448 states have (on average 1.3848039215686274) internal successors, (3390), 2482 states have internal predecessors, (3390), 221 states have call successors, (221), 121 states have call predecessors, (221), 141 states have return successors, (301), 216 states have call predecessors, (301), 220 states have call successors, (301) [2022-07-13 21:07:27,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2812 states to 2812 states and 3912 transitions. [2022-07-13 21:07:27,241 INFO L78 Accepts]: Start accepts. Automaton has 2812 states and 3912 transitions. Word has length 88 [2022-07-13 21:07:27,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:07:27,241 INFO L495 AbstractCegarLoop]: Abstraction has 2812 states and 3912 transitions. [2022-07-13 21:07:27,242 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) [2022-07-13 21:07:27,242 INFO L276 IsEmpty]: Start isEmpty. Operand 2812 states and 3912 transitions. [2022-07-13 21:07:27,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-07-13 21:07:27,247 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:07:27,248 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] [2022-07-13 21:07:27,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 21:07:27,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:07:27,462 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:07:27,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:07:27,463 INFO L85 PathProgramCache]: Analyzing trace with hash -483240636, now seen corresponding path program 1 times [2022-07-13 21:07:27,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:07:27,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000052037] [2022-07-13 21:07:27,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:07:27,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:07:27,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:27,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 21:07:27,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:27,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-13 21:07:27,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:27,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-13 21:07:27,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:27,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-13 21:07:27,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:27,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-13 21:07:27,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:27,524 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-13 21:07:27,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:07:27,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000052037] [2022-07-13 21:07:27,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000052037] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:07:27,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463656592] [2022-07-13 21:07:27,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:07:27,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:07:27,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:07:27,527 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) [2022-07-13 21:07:27,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 21:07:27,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:27,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 21:07:27,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:07:27,645 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-13 21:07:27,645 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 21:07:27,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463656592] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:07:27,646 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 21:07:27,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-07-13 21:07:27,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629011722] [2022-07-13 21:07:27,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:07:27,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:07:27,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:07:27,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:07:27,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:07:27,648 INFO L87 Difference]: Start difference. First operand 2812 states and 3912 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) [2022-07-13 21:07:27,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:07:27,783 INFO L93 Difference]: Finished difference Result 3191 states and 4380 transitions. [2022-07-13 21:07:27,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:07:27,784 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 [2022-07-13 21:07:27,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:07:27,799 INFO L225 Difference]: With dead ends: 3191 [2022-07-13 21:07:27,800 INFO L226 Difference]: Without dead ends: 1865 [2022-07-13 21:07:27,802 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 [2022-07-13 21:07:27,803 INFO L413 NwaCegarLoop]: 361 mSDtfsCounter, 62 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 652 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 [2022-07-13 21:07:27,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 652 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 21:07:27,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1865 states. [2022-07-13 21:07:27,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1865 to 1865. [2022-07-13 21:07:27,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1865 states, 1604 states have (on average 1.453865336658354) internal successors, (2332), 1622 states have internal predecessors, (2332), 164 states have call successors, (164), 84 states have call predecessors, (164), 96 states have return successors, (209), 166 states have call predecessors, (209), 164 states have call successors, (209) [2022-07-13 21:07:27,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1865 states to 1865 states and 2705 transitions. [2022-07-13 21:07:27,893 INFO L78 Accepts]: Start accepts. Automaton has 1865 states and 2705 transitions. Word has length 103 [2022-07-13 21:07:27,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:07:27,894 INFO L495 AbstractCegarLoop]: Abstraction has 1865 states and 2705 transitions. [2022-07-13 21:07:27,894 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) [2022-07-13 21:07:27,894 INFO L276 IsEmpty]: Start isEmpty. Operand 1865 states and 2705 transitions. [2022-07-13 21:07:27,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-07-13 21:07:27,898 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:07:27,898 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:07:27,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 21:07:28,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-13 21:07:28,119 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:07:28,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:07:28,119 INFO L85 PathProgramCache]: Analyzing trace with hash -2138787050, now seen corresponding path program 1 times [2022-07-13 21:07:28,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:07:28,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409837727] [2022-07-13 21:07:28,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:07:28,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:07:28,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:28,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:07:28,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:28,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 21:07:28,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:28,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-13 21:07:28,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:28,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-13 21:07:28,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:28,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-13 21:07:28,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:28,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-13 21:07:28,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:28,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-13 21:07:28,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:28,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-13 21:07:28,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:28,213 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-13 21:07:28,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:07:28,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409837727] [2022-07-13 21:07:28,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409837727] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:07:28,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954220437] [2022-07-13 21:07:28,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:07:28,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:07:28,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:07:28,215 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:07:28,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 21:07:28,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:28,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 21:07:28,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:07:28,373 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-13 21:07:28,374 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 21:07:28,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954220437] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:07:28,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 21:07:28,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2022-07-13 21:07:28,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450863736] [2022-07-13 21:07:28,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:07:28,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:07:28,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:07:28,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:07:28,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-13 21:07:28,377 INFO L87 Difference]: Start difference. First operand 1865 states and 2705 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-13 21:07:28,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:07:28,567 INFO L93 Difference]: Finished difference Result 5498 states and 8031 transitions. [2022-07-13 21:07:28,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:07:28,568 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 128 [2022-07-13 21:07:28,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:07:28,590 INFO L225 Difference]: With dead ends: 5498 [2022-07-13 21:07:28,591 INFO L226 Difference]: Without dead ends: 3646 [2022-07-13 21:07:28,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-13 21:07:28,598 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 176 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 21:07:28,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 427 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 21:07:28,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3646 states. [2022-07-13 21:07:28,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3646 to 3616. [2022-07-13 21:07:28,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3616 states, 3113 states have (on average 1.4529392868615483) internal successors, (4523), 3148 states have internal predecessors, (4523), 310 states have call successors, (310), 168 states have call predecessors, (310), 192 states have return successors, (393), 307 states have call predecessors, (393), 310 states have call successors, (393) [2022-07-13 21:07:28,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3616 states to 3616 states and 5226 transitions. [2022-07-13 21:07:28,825 INFO L78 Accepts]: Start accepts. Automaton has 3616 states and 5226 transitions. Word has length 128 [2022-07-13 21:07:28,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:07:28,826 INFO L495 AbstractCegarLoop]: Abstraction has 3616 states and 5226 transitions. [2022-07-13 21:07:28,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-13 21:07:28,826 INFO L276 IsEmpty]: Start isEmpty. Operand 3616 states and 5226 transitions. [2022-07-13 21:07:28,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-07-13 21:07:28,833 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:07:28,834 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:07:28,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-13 21:07:29,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-13 21:07:29,048 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:07:29,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:07:29,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1124784650, now seen corresponding path program 1 times [2022-07-13 21:07:29,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:07:29,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947674686] [2022-07-13 21:07:29,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:07:29,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:07:29,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:29,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:07:29,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:29,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 21:07:29,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:29,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-13 21:07:29,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:29,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-13 21:07:29,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:29,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-13 21:07:29,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:29,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-13 21:07:29,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:29,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-13 21:07:29,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:29,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-13 21:07:29,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:29,141 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-13 21:07:29,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:07:29,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947674686] [2022-07-13 21:07:29,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947674686] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:07:29,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868228389] [2022-07-13 21:07:29,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:07:29,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:07:29,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:07:29,145 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:07:29,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 21:07:29,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:29,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 21:07:29,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:07:29,288 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-13 21:07:29,288 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 21:07:29,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868228389] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:07:29,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 21:07:29,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-07-13 21:07:29,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983885228] [2022-07-13 21:07:29,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:07:29,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:07:29,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:07:29,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:07:29,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-13 21:07:29,291 INFO L87 Difference]: Start difference. First operand 3616 states and 5226 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-13 21:07:29,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:07:29,637 INFO L93 Difference]: Finished difference Result 10677 states and 15626 transitions. [2022-07-13 21:07:29,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:07:29,638 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 128 [2022-07-13 21:07:29,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:07:29,666 INFO L225 Difference]: With dead ends: 10677 [2022-07-13 21:07:29,666 INFO L226 Difference]: Without dead ends: 7075 [2022-07-13 21:07:29,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-13 21:07:29,677 INFO L413 NwaCegarLoop]: 419 mSDtfsCounter, 191 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 21:07:29,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 639 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 21:07:29,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7075 states. [2022-07-13 21:07:30,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7075 to 7075. [2022-07-13 21:07:30,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7075 states, 6091 states have (on average 1.4457396158266294) internal successors, (8806), 6151 states have internal predecessors, (8806), 599 states have call successors, (599), 336 states have call predecessors, (599), 384 states have return successors, (884), 603 states have call predecessors, (884), 599 states have call successors, (884) [2022-07-13 21:07:30,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7075 states to 7075 states and 10289 transitions. [2022-07-13 21:07:30,077 INFO L78 Accepts]: Start accepts. Automaton has 7075 states and 10289 transitions. Word has length 128 [2022-07-13 21:07:30,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:07:30,077 INFO L495 AbstractCegarLoop]: Abstraction has 7075 states and 10289 transitions. [2022-07-13 21:07:30,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-13 21:07:30,078 INFO L276 IsEmpty]: Start isEmpty. Operand 7075 states and 10289 transitions. [2022-07-13 21:07:30,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-07-13 21:07:30,097 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:07:30,097 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:07:30,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-13 21:07:30,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:07:30,312 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:07:30,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:07:30,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1709611055, now seen corresponding path program 1 times [2022-07-13 21:07:30,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:07:30,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478365088] [2022-07-13 21:07:30,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:07:30,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:07:30,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:30,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:07:30,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:30,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 21:07:30,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:30,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-13 21:07:30,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:30,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-13 21:07:30,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:30,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-13 21:07:30,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:30,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-13 21:07:30,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:30,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-13 21:07:30,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:30,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-07-13 21:07:30,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:30,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-13 21:07:30,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:30,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-07-13 21:07:30,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:30,416 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-13 21:07:30,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:07:30,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478365088] [2022-07-13 21:07:30,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478365088] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:07:30,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57993950] [2022-07-13 21:07:30,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:07:30,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:07:30,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:07:30,418 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:07:30,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-13 21:07:30,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:30,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 21:07:30,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:07:30,653 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-13 21:07:30,653 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 21:07:30,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57993950] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:07:30,654 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 21:07:30,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2022-07-13 21:07:30,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923295973] [2022-07-13 21:07:30,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:07:30,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:07:30,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:07:30,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:07:30,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-13 21:07:30,656 INFO L87 Difference]: Start difference. First operand 7075 states and 10289 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-07-13 21:07:31,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:07:31,219 INFO L93 Difference]: Finished difference Result 20881 states and 30614 transitions. [2022-07-13 21:07:31,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:07:31,219 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 166 [2022-07-13 21:07:31,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:07:31,275 INFO L225 Difference]: With dead ends: 20881 [2022-07-13 21:07:31,275 INFO L226 Difference]: Without dead ends: 13825 [2022-07-13 21:07:31,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-13 21:07:31,303 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 124 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 21:07:31,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 427 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 21:07:31,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13825 states. [2022-07-13 21:07:32,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13825 to 13711. [2022-07-13 21:07:32,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13711 states, 11823 states have (on average 1.444472638078322) internal successors, (17078), 11941 states have internal predecessors, (17078), 1127 states have call successors, (1127), 664 states have call predecessors, (1127), 760 states have return successors, (1648), 1121 states have call predecessors, (1648), 1127 states have call successors, (1648) [2022-07-13 21:07:32,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13711 states to 13711 states and 19853 transitions. [2022-07-13 21:07:32,115 INFO L78 Accepts]: Start accepts. Automaton has 13711 states and 19853 transitions. Word has length 166 [2022-07-13 21:07:32,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:07:32,115 INFO L495 AbstractCegarLoop]: Abstraction has 13711 states and 19853 transitions. [2022-07-13 21:07:32,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-07-13 21:07:32,116 INFO L276 IsEmpty]: Start isEmpty. Operand 13711 states and 19853 transitions. [2022-07-13 21:07:32,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-07-13 21:07:32,150 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:07:32,151 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:07:32,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-13 21:07:32,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:07:32,367 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:07:32,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:07:32,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1669305873, now seen corresponding path program 1 times [2022-07-13 21:07:32,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:07:32,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365437681] [2022-07-13 21:07:32,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:07:32,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:07:32,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:32,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:07:32,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:32,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 21:07:32,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:32,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-13 21:07:32,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:32,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-13 21:07:32,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:32,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-13 21:07:32,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:32,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-13 21:07:32,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:32,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-13 21:07:32,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:32,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-07-13 21:07:32,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:32,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-13 21:07:32,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:32,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-07-13 21:07:32,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:32,469 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-13 21:07:32,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:07:32,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365437681] [2022-07-13 21:07:32,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365437681] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:07:32,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301089714] [2022-07-13 21:07:32,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:07:32,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:07:32,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:07:32,471 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:07:32,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-13 21:07:32,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:32,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 21:07:32,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:07:32,719 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-13 21:07:32,719 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 21:07:32,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301089714] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:07:32,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 21:07:32,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2022-07-13 21:07:32,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031640949] [2022-07-13 21:07:32,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:07:32,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:07:32,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:07:32,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:07:32,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-13 21:07:32,721 INFO L87 Difference]: Start difference. First operand 13711 states and 19853 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-07-13 21:07:34,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:07:34,216 INFO L93 Difference]: Finished difference Result 40647 states and 59354 transitions. [2022-07-13 21:07:34,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:07:34,217 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 166 [2022-07-13 21:07:34,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:07:34,339 INFO L225 Difference]: With dead ends: 40647 [2022-07-13 21:07:34,340 INFO L226 Difference]: Without dead ends: 26955 [2022-07-13 21:07:34,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-13 21:07:34,478 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 126 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 21:07:34,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 436 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 21:07:34,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26955 states. [2022-07-13 21:07:35,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26955 to 26729. [2022-07-13 21:07:35,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26729 states, 23045 states have (on average 1.4411802994141896) internal successors, (33212), 23279 states have internal predecessors, (33212), 2173 states have call successors, (2173), 1318 states have call predecessors, (2173), 1510 states have return successors, (3160), 2147 states have call predecessors, (3160), 2173 states have call successors, (3160) [2022-07-13 21:07:35,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26729 states to 26729 states and 38545 transitions. [2022-07-13 21:07:35,809 INFO L78 Accepts]: Start accepts. Automaton has 26729 states and 38545 transitions. Word has length 166 [2022-07-13 21:07:35,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:07:35,810 INFO L495 AbstractCegarLoop]: Abstraction has 26729 states and 38545 transitions. [2022-07-13 21:07:35,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-07-13 21:07:35,811 INFO L276 IsEmpty]: Start isEmpty. Operand 26729 states and 38545 transitions. [2022-07-13 21:07:35,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-07-13 21:07:35,878 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:07:35,878 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:07:35,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-13 21:07:36,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-07-13 21:07:36,104 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:07:36,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:07:36,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1857787437, now seen corresponding path program 1 times [2022-07-13 21:07:36,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:07:36,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079141696] [2022-07-13 21:07:36,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:07:36,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:07:36,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:36,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:07:36,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:36,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 21:07:36,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:36,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-13 21:07:36,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:36,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-13 21:07:36,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:36,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-13 21:07:36,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:36,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-13 21:07:36,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:36,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-13 21:07:36,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:36,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-13 21:07:36,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:36,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-07-13 21:07:36,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:36,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-13 21:07:36,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:36,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2022-07-13 21:07:36,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:36,217 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-07-13 21:07:36,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:07:36,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079141696] [2022-07-13 21:07:36,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079141696] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:07:36,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162960164] [2022-07-13 21:07:36,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:07:36,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:07:36,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:07:36,219 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:07:36,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-13 21:07:36,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:36,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 21:07:36,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:07:36,433 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-13 21:07:36,433 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 21:07:36,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162960164] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:07:36,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 21:07:36,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-07-13 21:07:36,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835451615] [2022-07-13 21:07:36,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:07:36,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:07:36,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:07:36,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:07:36,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-13 21:07:36,436 INFO L87 Difference]: Start difference. First operand 26729 states and 38545 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-07-13 21:07:38,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:07:38,089 INFO L93 Difference]: Finished difference Result 56871 states and 82434 transitions. [2022-07-13 21:07:38,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:07:38,090 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 184 [2022-07-13 21:07:38,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:07:38,208 INFO L225 Difference]: With dead ends: 56871 [2022-07-13 21:07:38,208 INFO L226 Difference]: Without dead ends: 30163 [2022-07-13 21:07:38,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-13 21:07:38,282 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 149 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 21:07:38,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 263 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 21:07:38,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30163 states. [2022-07-13 21:07:39,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30163 to 30163. [2022-07-13 21:07:40,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30163 states, 26195 states have (on average 1.4027867913723993) internal successors, (36746), 26429 states have internal predecessors, (36746), 2259 states have call successors, (2259), 1516 states have call predecessors, (2259), 1708 states have return successors, (3282), 2233 states have call predecessors, (3282), 2259 states have call successors, (3282) [2022-07-13 21:07:40,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30163 states to 30163 states and 42287 transitions. [2022-07-13 21:07:40,077 INFO L78 Accepts]: Start accepts. Automaton has 30163 states and 42287 transitions. Word has length 184 [2022-07-13 21:07:40,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:07:40,078 INFO L495 AbstractCegarLoop]: Abstraction has 30163 states and 42287 transitions. [2022-07-13 21:07:40,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-07-13 21:07:40,078 INFO L276 IsEmpty]: Start isEmpty. Operand 30163 states and 42287 transitions. [2022-07-13 21:07:40,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-07-13 21:07:40,126 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:07:40,127 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:07:40,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-13 21:07:40,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:07:40,351 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:07:40,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:07:40,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1009724368, now seen corresponding path program 1 times [2022-07-13 21:07:40,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:07:40,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791601417] [2022-07-13 21:07:40,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:07:40,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:07:40,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:40,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:07:40,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:40,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 21:07:40,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:40,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-13 21:07:40,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:40,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-13 21:07:40,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:40,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-13 21:07:40,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:40,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-13 21:07:40,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:40,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-13 21:07:40,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:40,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-13 21:07:40,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:40,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-07-13 21:07:40,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:40,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-13 21:07:40,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:40,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2022-07-13 21:07:40,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:40,463 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-07-13 21:07:40,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:07:40,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791601417] [2022-07-13 21:07:40,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791601417] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:07:40,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073766272] [2022-07-13 21:07:40,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:07:40,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:07:40,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:07:40,465 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:07:40,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-13 21:07:40,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:40,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 635 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 21:07:40,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:07:40,641 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-07-13 21:07:40,641 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 21:07:40,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073766272] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:07:40,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 21:07:40,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-07-13 21:07:40,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712551754] [2022-07-13 21:07:40,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:07:40,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:07:40,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:07:40,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:07:40,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-13 21:07:40,644 INFO L87 Difference]: Start difference. First operand 30163 states and 42287 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-13 21:07:42,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:07:42,214 INFO L93 Difference]: Finished difference Result 53051 states and 74136 transitions. [2022-07-13 21:07:42,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:07:42,215 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 184 [2022-07-13 21:07:42,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:07:42,334 INFO L225 Difference]: With dead ends: 53051 [2022-07-13 21:07:42,334 INFO L226 Difference]: Without dead ends: 32319 [2022-07-13 21:07:42,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-13 21:07:42,383 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 161 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 21:07:42,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 447 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 21:07:42,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32319 states. [2022-07-13 21:07:44,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32319 to 32223. [2022-07-13 21:07:44,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32223 states, 28071 states have (on average 1.3772932920095473) internal successors, (38662), 28305 states have internal predecessors, (38662), 2311 states have call successors, (2311), 1648 states have call predecessors, (2311), 1840 states have return successors, (3466), 2285 states have call predecessors, (3466), 2311 states have call successors, (3466) [2022-07-13 21:07:44,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32223 states to 32223 states and 44439 transitions. [2022-07-13 21:07:44,511 INFO L78 Accepts]: Start accepts. Automaton has 32223 states and 44439 transitions. Word has length 184 [2022-07-13 21:07:44,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:07:44,512 INFO L495 AbstractCegarLoop]: Abstraction has 32223 states and 44439 transitions. [2022-07-13 21:07:44,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-13 21:07:44,513 INFO L276 IsEmpty]: Start isEmpty. Operand 32223 states and 44439 transitions. [2022-07-13 21:07:44,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-07-13 21:07:44,571 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:07:44,571 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:07:44,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-13 21:07:44,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-07-13 21:07:44,787 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:07:44,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:07:44,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1450159248, now seen corresponding path program 1 times [2022-07-13 21:07:44,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:07:44,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524467851] [2022-07-13 21:07:44,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:07:44,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:07:44,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:44,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:07:44,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:44,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 21:07:44,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:44,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-13 21:07:44,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:44,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-13 21:07:44,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:44,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-13 21:07:44,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:44,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-13 21:07:44,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:44,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-13 21:07:44,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:44,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-13 21:07:44,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:44,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-07-13 21:07:44,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:44,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-13 21:07:44,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:44,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2022-07-13 21:07:44,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:44,884 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-07-13 21:07:44,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:07:44,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524467851] [2022-07-13 21:07:44,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524467851] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:07:44,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967261342] [2022-07-13 21:07:44,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:07:44,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:07:44,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:07:44,886 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:07:44,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-13 21:07:45,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:45,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 21:07:45,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:07:45,029 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-13 21:07:45,030 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 21:07:45,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967261342] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:07:45,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 21:07:45,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-07-13 21:07:45,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946972373] [2022-07-13 21:07:45,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:07:45,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:07:45,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:07:45,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:07:45,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-13 21:07:45,032 INFO L87 Difference]: Start difference. First operand 32223 states and 44439 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2022-07-13 21:07:48,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:07:48,266 INFO L93 Difference]: Finished difference Result 95367 states and 132985 transitions. [2022-07-13 21:07:48,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:07:48,267 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 185 [2022-07-13 21:07:48,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:07:48,528 INFO L225 Difference]: With dead ends: 95367 [2022-07-13 21:07:48,528 INFO L226 Difference]: Without dead ends: 63165 [2022-07-13 21:07:48,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-13 21:07:48,604 INFO L413 NwaCegarLoop]: 418 mSDtfsCounter, 189 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 21:07:48,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 636 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 21:07:48,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63165 states. [2022-07-13 21:07:51,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63165 to 63139. [2022-07-13 21:07:51,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63139 states, 54965 states have (on average 1.3690166469571545) internal successors, (75248), 55433 states have internal predecessors, (75248), 4525 states have call successors, (4525), 3264 states have call predecessors, (4525), 3648 states have return successors, (8126), 4473 states have call predecessors, (8126), 4525 states have call successors, (8126) [2022-07-13 21:07:52,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63139 states to 63139 states and 87899 transitions. [2022-07-13 21:07:52,076 INFO L78 Accepts]: Start accepts. Automaton has 63139 states and 87899 transitions. Word has length 185 [2022-07-13 21:07:52,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:07:52,077 INFO L495 AbstractCegarLoop]: Abstraction has 63139 states and 87899 transitions. [2022-07-13 21:07:52,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2022-07-13 21:07:52,077 INFO L276 IsEmpty]: Start isEmpty. Operand 63139 states and 87899 transitions. [2022-07-13 21:07:52,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-07-13 21:07:52,186 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:07:52,186 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:07:52,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-13 21:07:52,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-07-13 21:07:52,386 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:07:52,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:07:52,387 INFO L85 PathProgramCache]: Analyzing trace with hash 87421137, now seen corresponding path program 1 times [2022-07-13 21:07:52,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:07:52,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298692894] [2022-07-13 21:07:52,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:07:52,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:07:52,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:52,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:07:52,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:52,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 21:07:52,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:52,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-13 21:07:52,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:52,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-13 21:07:52,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:52,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-13 21:07:52,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:52,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-13 21:07:52,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:52,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-13 21:07:52,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:52,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-13 21:07:52,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:52,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-07-13 21:07:52,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:52,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-13 21:07:52,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:52,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2022-07-13 21:07:52,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:52,482 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-07-13 21:07:52,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:07:52,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298692894] [2022-07-13 21:07:52,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298692894] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:07:52,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149943277] [2022-07-13 21:07:52,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:07:52,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:07:52,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:07:52,484 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:07:52,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-13 21:07:52,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:07:52,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 21:07:52,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:07:52,637 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-13 21:07:52,638 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 21:07:52,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149943277] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:07:52,638 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 21:07:52,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-07-13 21:07:52,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352098148] [2022-07-13 21:07:52,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:07:52,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:07:52,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:07:52,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:07:52,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-13 21:07:52,640 INFO L87 Difference]: Start difference. First operand 63139 states and 87899 transitions. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-07-13 21:07:58,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:07:58,192 INFO L93 Difference]: Finished difference Result 179655 states and 254083 transitions. [2022-07-13 21:07:58,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:07:58,193 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 185 [2022-07-13 21:07:58,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:07:58,598 INFO L225 Difference]: With dead ends: 179655 [2022-07-13 21:07:58,598 INFO L226 Difference]: Without dead ends: 116549 [2022-07-13 21:07:58,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-13 21:07:58,739 INFO L413 NwaCegarLoop]: 415 mSDtfsCounter, 177 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 21:07:58,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 633 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 21:07:58,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116549 states. [2022-07-13 21:08:05,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116549 to 116547. [2022-07-13 21:08:05,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116547 states, 101097 states have (on average 1.3641156513051822) internal successors, (137908), 102033 states have internal predecessors, (137908), 8601 states have call successors, (8601), 6080 states have call predecessors, (8601), 6848 states have return successors, (18420), 8497 states have call predecessors, (18420), 8601 states have call successors, (18420) [2022-07-13 21:08:06,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116547 states to 116547 states and 164929 transitions. [2022-07-13 21:08:06,029 INFO L78 Accepts]: Start accepts. Automaton has 116547 states and 164929 transitions. Word has length 185 [2022-07-13 21:08:06,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:08:06,030 INFO L495 AbstractCegarLoop]: Abstraction has 116547 states and 164929 transitions. [2022-07-13 21:08:06,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-07-13 21:08:06,030 INFO L276 IsEmpty]: Start isEmpty. Operand 116547 states and 164929 transitions. [2022-07-13 21:08:06,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-07-13 21:08:06,206 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:08:06,206 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:08:06,224 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-07-13 21:08:06,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-07-13 21:08:06,410 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:08:06,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:08:06,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1959075529, now seen corresponding path program 1 times [2022-07-13 21:08:06,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:08:06,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804449236] [2022-07-13 21:08:06,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:08:06,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:08:06,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:06,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:08:06,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:06,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 21:08:06,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:06,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-13 21:08:06,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:06,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-13 21:08:06,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:06,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-13 21:08:06,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:06,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-13 21:08:06,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:06,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-13 21:08:06,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:06,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-13 21:08:06,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:06,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-07-13 21:08:06,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:06,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-13 21:08:06,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:06,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2022-07-13 21:08:06,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:06,513 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-07-13 21:08:06,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:08:06,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804449236] [2022-07-13 21:08:06,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804449236] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:08:06,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909090247] [2022-07-13 21:08:06,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:08:06,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:08:06,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:08:06,516 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:08:06,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-13 21:08:06,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:06,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 21:08:06,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:08:06,739 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-07-13 21:08:06,739 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 21:08:06,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909090247] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:08:06,739 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 21:08:06,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-07-13 21:08:06,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885411941] [2022-07-13 21:08:06,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:08:06,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:08:06,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:08:06,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:08:06,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-13 21:08:06,742 INFO L87 Difference]: Start difference. First operand 116547 states and 164929 transitions. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10)