./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-industry-pattern/array_single_elem_init.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-industry-pattern/array_single_elem_init.i -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 783ac259376d0d4b331b84c9ee3bd0ed2042af56d21e98db70a8bebb07aee3c2 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-20 20:58:19,950 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 20:58:19,957 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 20:58:20,010 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 20:58:20,011 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 20:58:20,012 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 20:58:20,015 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 20:58:20,018 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 20:58:20,019 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 20:58:20,022 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 20:58:20,025 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 20:58:20,026 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 20:58:20,026 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 20:58:20,028 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 20:58:20,029 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 20:58:20,030 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 20:58:20,034 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 20:58:20,034 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 20:58:20,037 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 20:58:20,038 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 20:58:20,042 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 20:58:20,044 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 20:58:20,045 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 20:58:20,045 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 20:58:20,046 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 20:58:20,049 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 20:58:20,050 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 20:58:20,050 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 20:58:20,051 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 20:58:20,052 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 20:58:20,052 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 20:58:20,053 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 20:58:20,054 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 20:58:20,055 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 20:58:20,055 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 20:58:20,056 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 20:58:20,056 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 20:58:20,057 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 20:58:20,057 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 20:58:20,057 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 20:58:20,058 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 20:58:20,059 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 20:58:20,060 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-20 20:58:20,086 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 20:58:20,087 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 20:58:20,087 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 20:58:20,087 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 20:58:20,088 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 20:58:20,088 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 20:58:20,089 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 20:58:20,089 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 20:58:20,089 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 20:58:20,090 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 20:58:20,090 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 20:58:20,090 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 20:58:20,091 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 20:58:20,091 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 20:58:20,091 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-20 20:58:20,091 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 20:58:20,091 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-20 20:58:20,091 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 20:58:20,092 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-20 20:58:20,092 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 20:58:20,092 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-20 20:58:20,092 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 20:58:20,092 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 20:58:20,093 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 20:58:20,093 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 20:58:20,093 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 20:58:20,093 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 20:58:20,093 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-20 20:58:20,094 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 20:58:20,094 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 20:58:20,094 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-20 20:58:20,094 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-20 20:58:20,094 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-20 20:58:20,095 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 783ac259376d0d4b331b84c9ee3bd0ed2042af56d21e98db70a8bebb07aee3c2 [2022-07-20 20:58:20,310 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 20:58:20,328 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 20:58:20,330 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 20:58:20,331 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 20:58:20,331 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 20:58:20,332 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-industry-pattern/array_single_elem_init.i [2022-07-20 20:58:20,383 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71c4cce2b/6e32c01aa77c4087af1f9f5b7a7a6eeb/FLAG53fd3dc2d [2022-07-20 20:58:20,759 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 20:58:20,759 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/array_single_elem_init.i [2022-07-20 20:58:20,765 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71c4cce2b/6e32c01aa77c4087af1f9f5b7a7a6eeb/FLAG53fd3dc2d [2022-07-20 20:58:20,780 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71c4cce2b/6e32c01aa77c4087af1f9f5b7a7a6eeb [2022-07-20 20:58:20,783 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 20:58:20,784 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 20:58:20,785 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 20:58:20,785 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 20:58:20,788 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 20:58:20,789 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 08:58:20" (1/1) ... [2022-07-20 20:58:20,790 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fe75ee6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:58:20, skipping insertion in model container [2022-07-20 20:58:20,790 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 08:58:20" (1/1) ... [2022-07-20 20:58:20,795 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 20:58:20,807 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 20:58:20,957 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/array-industry-pattern/array_single_elem_init.i[815,828] [2022-07-20 20:58:20,974 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 20:58:20,980 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 20:58:20,994 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/array-industry-pattern/array_single_elem_init.i[815,828] [2022-07-20 20:58:21,012 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 20:58:21,022 INFO L208 MainTranslator]: Completed translation [2022-07-20 20:58:21,022 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:58:21 WrapperNode [2022-07-20 20:58:21,022 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 20:58:21,024 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 20:58:21,024 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 20:58:21,024 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 20:58:21,029 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:58:21" (1/1) ... [2022-07-20 20:58:21,043 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:58:21" (1/1) ... [2022-07-20 20:58:21,057 INFO L137 Inliner]: procedures = 16, calls = 25, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 70 [2022-07-20 20:58:21,057 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 20:58:21,058 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 20:58:21,058 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 20:58:21,058 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 20:58:21,064 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:58:21" (1/1) ... [2022-07-20 20:58:21,064 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:58:21" (1/1) ... [2022-07-20 20:58:21,065 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:58:21" (1/1) ... [2022-07-20 20:58:21,066 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:58:21" (1/1) ... [2022-07-20 20:58:21,070 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:58:21" (1/1) ... [2022-07-20 20:58:21,073 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:58:21" (1/1) ... [2022-07-20 20:58:21,073 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:58:21" (1/1) ... [2022-07-20 20:58:21,075 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 20:58:21,076 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 20:58:21,076 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 20:58:21,076 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 20:58:21,077 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:58:21" (1/1) ... [2022-07-20 20:58:21,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 20:58:21,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:58:21,104 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) [2022-07-20 20:58:21,108 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 [2022-07-20 20:58:21,146 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 20:58:21,146 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-20 20:58:21,146 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-20 20:58:21,146 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-20 20:58:21,146 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 20:58:21,146 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 20:58:21,146 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-20 20:58:21,146 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-20 20:58:21,194 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 20:58:21,195 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 20:58:21,317 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 20:58:21,323 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 20:58:21,323 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-20 20:58:21,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 08:58:21 BoogieIcfgContainer [2022-07-20 20:58:21,325 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 20:58:21,327 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 20:58:21,327 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 20:58:21,330 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 20:58:21,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 08:58:20" (1/3) ... [2022-07-20 20:58:21,331 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dd6ca6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 08:58:21, skipping insertion in model container [2022-07-20 20:58:21,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:58:21" (2/3) ... [2022-07-20 20:58:21,332 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dd6ca6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 08:58:21, skipping insertion in model container [2022-07-20 20:58:21,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 08:58:21" (3/3) ... [2022-07-20 20:58:21,333 INFO L111 eAbstractionObserver]: Analyzing ICFG array_single_elem_init.i [2022-07-20 20:58:21,346 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 20:58:21,346 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-20 20:58:21,386 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 20:58:21,393 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@31cb8e30, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3324eb8d [2022-07-20 20:58:21,393 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-20 20:58:21,400 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:21,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-20 20:58:21,411 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:58:21,411 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:58:21,412 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:58:21,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:58:21,420 INFO L85 PathProgramCache]: Analyzing trace with hash 916381450, now seen corresponding path program 1 times [2022-07-20 20:58:21,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:58:21,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204588573] [2022-07-20 20:58:21,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:58:21,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:58:21,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:58:21,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:58:21,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:58:21,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204588573] [2022-07-20 20:58:21,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204588573] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 20:58:21,599 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 20:58:21,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 20:58:21,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616428725] [2022-07-20 20:58:21,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 20:58:21,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-20 20:58:21,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:58:21,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-20 20:58:21,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-20 20:58:21,628 INFO L87 Difference]: Start difference. First operand has 20 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:21,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:58:21,639 INFO L93 Difference]: Finished difference Result 32 states and 43 transitions. [2022-07-20 20:58:21,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-20 20:58:21,640 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-20 20:58:21,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:58:21,646 INFO L225 Difference]: With dead ends: 32 [2022-07-20 20:58:21,646 INFO L226 Difference]: Without dead ends: 16 [2022-07-20 20:58:21,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-20 20:58:21,654 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 20:58:21,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 20:58:21,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-07-20 20:58:21,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-07-20 20:58:21,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:21,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 21 transitions. [2022-07-20 20:58:21,679 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 21 transitions. Word has length 8 [2022-07-20 20:58:21,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:58:21,679 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 21 transitions. [2022-07-20 20:58:21,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:21,680 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 21 transitions. [2022-07-20 20:58:21,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-20 20:58:21,680 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:58:21,681 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:58:21,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-20 20:58:21,681 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:58:21,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:58:21,682 INFO L85 PathProgramCache]: Analyzing trace with hash 229281826, now seen corresponding path program 1 times [2022-07-20 20:58:21,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:58:21,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170036558] [2022-07-20 20:58:21,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:58:21,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:58:21,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:58:21,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:58:21,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:58:21,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170036558] [2022-07-20 20:58:21,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170036558] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 20:58:21,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 20:58:21,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 20:58:21,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907834017] [2022-07-20 20:58:21,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 20:58:21,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 20:58:21,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:58:21,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 20:58:21,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 20:58:21,779 INFO L87 Difference]: Start difference. First operand 16 states and 21 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:21,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:58:21,838 INFO L93 Difference]: Finished difference Result 33 states and 44 transitions. [2022-07-20 20:58:21,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 20:58:21,839 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-20 20:58:21,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:58:21,840 INFO L225 Difference]: With dead ends: 33 [2022-07-20 20:58:21,840 INFO L226 Difference]: Without dead ends: 25 [2022-07-20 20:58:21,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 20:58:21,841 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 20:58:21,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 18 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 20:58:21,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-07-20 20:58:21,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 19. [2022-07-20 20:58:21,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:21,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2022-07-20 20:58:21,847 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 8 [2022-07-20 20:58:21,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:58:21,848 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2022-07-20 20:58:21,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:21,849 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2022-07-20 20:58:21,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-20 20:58:21,850 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:58:21,850 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:58:21,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-20 20:58:21,860 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:58:21,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:58:21,861 INFO L85 PathProgramCache]: Analyzing trace with hash -528137142, now seen corresponding path program 1 times [2022-07-20 20:58:21,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:58:21,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078271397] [2022-07-20 20:58:21,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:58:21,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:58:21,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:58:21,954 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 20:58:21,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:58:21,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078271397] [2022-07-20 20:58:21,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078271397] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:58:21,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442345045] [2022-07-20 20:58:21,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:58:21,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:58:21,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:58:21,957 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) [2022-07-20 20:58:21,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-20 20:58:22,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:58:22,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 20:58:22,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:58:22,079 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 20:58:22,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:58:22,116 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 20:58:22,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442345045] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:58:22,117 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:58:22,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-20 20:58:22,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126679475] [2022-07-20 20:58:22,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:58:22,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 20:58:22,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:58:22,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 20:58:22,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-20 20:58:22,124 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:22,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:58:22,218 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2022-07-20 20:58:22,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 20:58:22,218 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-20 20:58:22,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:58:22,220 INFO L225 Difference]: With dead ends: 55 [2022-07-20 20:58:22,220 INFO L226 Difference]: Without dead ends: 45 [2022-07-20 20:58:22,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-20 20:58:22,223 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 51 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 20:58:22,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 29 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 20:58:22,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-07-20 20:58:22,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 40. [2022-07-20 20:58:22,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.3846153846153846) internal successors, (54), 39 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:22,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2022-07-20 20:58:22,239 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 16 [2022-07-20 20:58:22,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:58:22,240 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2022-07-20 20:58:22,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:22,240 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2022-07-20 20:58:22,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-20 20:58:22,241 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:58:22,241 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:58:22,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-20 20:58:22,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:58:22,466 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:58:22,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:58:22,466 INFO L85 PathProgramCache]: Analyzing trace with hash 310337378, now seen corresponding path program 2 times [2022-07-20 20:58:22,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:58:22,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82394727] [2022-07-20 20:58:22,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:58:22,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:58:22,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:58:22,578 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-20 20:58:22,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:58:22,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82394727] [2022-07-20 20:58:22,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82394727] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:58:22,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643148491] [2022-07-20 20:58:22,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 20:58:22,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:58:22,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:58:22,584 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) [2022-07-20 20:58:22,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-20 20:58:22,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 20:58:22,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:58:22,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-20 20:58:22,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:58:22,754 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-20 20:58:22,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:58:22,861 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-20 20:58:22,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643148491] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:58:22,862 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:58:22,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 13 [2022-07-20 20:58:22,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11115347] [2022-07-20 20:58:22,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:58:22,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-20 20:58:22,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:58:22,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-20 20:58:22,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-07-20 20:58:22,864 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:23,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:58:23,019 INFO L93 Difference]: Finished difference Result 112 states and 158 transitions. [2022-07-20 20:58:23,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-20 20:58:23,020 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-07-20 20:58:23,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:58:23,024 INFO L225 Difference]: With dead ends: 112 [2022-07-20 20:58:23,024 INFO L226 Difference]: Without dead ends: 99 [2022-07-20 20:58:23,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-07-20 20:58:23,028 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 210 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 20:58:23,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 46 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 20:58:23,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-07-20 20:58:23,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 85. [2022-07-20 20:58:23,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.3928571428571428) internal successors, (117), 84 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:23,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 117 transitions. [2022-07-20 20:58:23,053 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 117 transitions. Word has length 34 [2022-07-20 20:58:23,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:58:23,053 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 117 transitions. [2022-07-20 20:58:23,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:23,055 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 117 transitions. [2022-07-20 20:58:23,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-20 20:58:23,057 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:58:23,058 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:58:23,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-20 20:58:23,263 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,SelfDestructingSolverStorable3 [2022-07-20 20:58:23,264 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:58:23,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:58:23,264 INFO L85 PathProgramCache]: Analyzing trace with hash -708297260, now seen corresponding path program 3 times [2022-07-20 20:58:23,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:58:23,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2262117] [2022-07-20 20:58:23,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:58:23,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:58:23,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:58:23,511 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2022-07-20 20:58:23,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:58:23,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2262117] [2022-07-20 20:58:23,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2262117] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:58:23,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938412966] [2022-07-20 20:58:23,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 20:58:23,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:58:23,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:58:23,520 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) [2022-07-20 20:58:23,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-20 20:58:23,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-20 20:58:23,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:58:23,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-20 20:58:23,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:58:23,666 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-20 20:58:23,753 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 18 [2022-07-20 20:58:23,760 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-20 20:58:23,781 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-20 20:58:23,792 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 19 proven. 18 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2022-07-20 20:58:23,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:58:23,825 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 20:58:23,826 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2022-07-20 20:58:23,831 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2022-07-20 20:58:23,907 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 19 proven. 18 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2022-07-20 20:58:23,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938412966] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:58:23,908 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:58:23,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 13 [2022-07-20 20:58:23,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963488389] [2022-07-20 20:58:23,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:58:23,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-20 20:58:23,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:58:23,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-20 20:58:23,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-07-20 20:58:23,911 INFO L87 Difference]: Start difference. First operand 85 states and 117 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:24,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:58:24,269 INFO L93 Difference]: Finished difference Result 207 states and 289 transitions. [2022-07-20 20:58:24,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-20 20:58:24,270 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2022-07-20 20:58:24,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:58:24,271 INFO L225 Difference]: With dead ends: 207 [2022-07-20 20:58:24,271 INFO L226 Difference]: Without dead ends: 129 [2022-07-20 20:58:24,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=332, Invalid=724, Unknown=0, NotChecked=0, Total=1056 [2022-07-20 20:58:24,273 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 160 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 20:58:24,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 55 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 20:58:24,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-07-20 20:58:24,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 108. [2022-07-20 20:58:24,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.308411214953271) internal successors, (140), 107 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:24,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 140 transitions. [2022-07-20 20:58:24,281 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 140 transitions. Word has length 73 [2022-07-20 20:58:24,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:58:24,281 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 140 transitions. [2022-07-20 20:58:24,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:24,281 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 140 transitions. [2022-07-20 20:58:24,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-20 20:58:24,283 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:58:24,284 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:58:24,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-20 20:58:24,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:58:24,488 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:58:24,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:58:24,488 INFO L85 PathProgramCache]: Analyzing trace with hash -422151838, now seen corresponding path program 1 times [2022-07-20 20:58:24,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:58:24,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274724031] [2022-07-20 20:58:24,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:58:24,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:58:24,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:58:24,640 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-07-20 20:58:24,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:58:24,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274724031] [2022-07-20 20:58:24,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274724031] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:58:24,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843251564] [2022-07-20 20:58:24,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:58:24,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:58:24,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:58:24,644 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) [2022-07-20 20:58:24,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-20 20:58:24,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:58:24,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-20 20:58:24,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:58:24,817 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-07-20 20:58:24,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:58:25,024 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-07-20 20:58:25,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843251564] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:58:25,024 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:58:25,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-07-20 20:58:25,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591851518] [2022-07-20 20:58:25,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:58:25,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-20 20:58:25,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:58:25,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-20 20:58:25,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-07-20 20:58:25,027 INFO L87 Difference]: Start difference. First operand 108 states and 140 transitions. Second operand has 25 states, 25 states have (on average 4.72) internal successors, (118), 25 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:25,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:58:25,314 INFO L93 Difference]: Finished difference Result 276 states and 372 transitions. [2022-07-20 20:58:25,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-20 20:58:25,315 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.72) internal successors, (118), 25 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-07-20 20:58:25,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:58:25,316 INFO L225 Difference]: With dead ends: 276 [2022-07-20 20:58:25,316 INFO L226 Difference]: Without dead ends: 251 [2022-07-20 20:58:25,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-07-20 20:58:25,317 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 413 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 20:58:25,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [413 Valid, 78 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 20:58:25,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-07-20 20:58:25,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 219. [2022-07-20 20:58:25,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 1.31651376146789) internal successors, (287), 218 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:25,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 287 transitions. [2022-07-20 20:58:25,332 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 287 transitions. Word has length 76 [2022-07-20 20:58:25,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:58:25,332 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 287 transitions. [2022-07-20 20:58:25,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.72) internal successors, (118), 25 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:25,332 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 287 transitions. [2022-07-20 20:58:25,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-07-20 20:58:25,334 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:58:25,335 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:58:25,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-20 20:58:25,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:58:25,548 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:58:25,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:58:25,549 INFO L85 PathProgramCache]: Analyzing trace with hash 5109204, now seen corresponding path program 2 times [2022-07-20 20:58:25,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:58:25,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627288503] [2022-07-20 20:58:25,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:58:25,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:58:25,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:58:25,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1364 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2022-07-20 20:58:25,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:58:25,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627288503] [2022-07-20 20:58:25,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627288503] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:58:25,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976337884] [2022-07-20 20:58:25,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 20:58:25,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:58:25,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:58:25,885 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) [2022-07-20 20:58:25,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-20 20:58:26,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 20:58:26,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:58:26,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-20 20:58:26,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:58:26,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1364 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2022-07-20 20:58:26,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:58:26,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1364 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2022-07-20 20:58:26,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976337884] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:58:26,919 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:58:26,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2022-07-20 20:58:26,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398088910] [2022-07-20 20:58:26,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:58:26,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-20 20:58:26,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:58:26,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-20 20:58:26,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-07-20 20:58:26,922 INFO L87 Difference]: Start difference. First operand 219 states and 287 transitions. Second operand has 49 states, 49 states have (on average 4.857142857142857) internal successors, (238), 49 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:27,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:58:27,620 INFO L93 Difference]: Finished difference Result 555 states and 754 transitions. [2022-07-20 20:58:27,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-07-20 20:58:27,621 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 4.857142857142857) internal successors, (238), 49 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2022-07-20 20:58:27,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:58:27,626 INFO L225 Difference]: With dead ends: 555 [2022-07-20 20:58:27,627 INFO L226 Difference]: Without dead ends: 515 [2022-07-20 20:58:27,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-07-20 20:58:27,631 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 1017 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 275 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1017 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 275 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 20:58:27,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1017 Valid, 127 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [275 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-20 20:58:27,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2022-07-20 20:58:27,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 447. [2022-07-20 20:58:27,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 446 states have (on average 1.3161434977578474) internal successors, (587), 446 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:27,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 587 transitions. [2022-07-20 20:58:27,664 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 587 transitions. Word has length 151 [2022-07-20 20:58:27,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:58:27,684 INFO L495 AbstractCegarLoop]: Abstraction has 447 states and 587 transitions. [2022-07-20 20:58:27,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 4.857142857142857) internal successors, (238), 49 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:27,685 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 587 transitions. [2022-07-20 20:58:27,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2022-07-20 20:58:27,694 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:58:27,694 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 46, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:58:27,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-20 20:58:27,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:58:27,919 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:58:27,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:58:27,920 INFO L85 PathProgramCache]: Analyzing trace with hash 749201748, now seen corresponding path program 3 times [2022-07-20 20:58:27,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:58:27,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412540945] [2022-07-20 20:58:27,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:58:27,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:58:27,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:58:28,915 INFO L134 CoverageAnalysis]: Checked inductivity of 6026 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2022-07-20 20:58:28,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:58:28,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412540945] [2022-07-20 20:58:28,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412540945] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:58:28,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217210834] [2022-07-20 20:58:28,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 20:58:28,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:58:28,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:58:28,917 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) [2022-07-20 20:58:28,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-20 20:58:29,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2022-07-20 20:58:29,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:58:29,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-20 20:58:29,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:58:29,647 INFO L134 CoverageAnalysis]: Checked inductivity of 6026 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 5221 trivial. 0 not checked. [2022-07-20 20:58:29,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:58:30,715 INFO L134 CoverageAnalysis]: Checked inductivity of 6026 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 5221 trivial. 0 not checked. [2022-07-20 20:58:30,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217210834] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:58:30,716 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:58:30,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 26, 26] total 74 [2022-07-20 20:58:30,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980055841] [2022-07-20 20:58:30,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:58:30,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-07-20 20:58:30,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:58:30,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-07-20 20:58:30,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2022-07-20 20:58:30,721 INFO L87 Difference]: Start difference. First operand 447 states and 587 transitions. Second operand has 74 states, 74 states have (on average 5.283783783783784) internal successors, (391), 74 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:32,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:58:32,196 INFO L93 Difference]: Finished difference Result 875 states and 1167 transitions. [2022-07-20 20:58:32,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-07-20 20:58:32,197 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 5.283783783783784) internal successors, (391), 74 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 307 [2022-07-20 20:58:32,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:58:32,201 INFO L225 Difference]: With dead ends: 875 [2022-07-20 20:58:32,201 INFO L226 Difference]: Without dead ends: 799 [2022-07-20 20:58:32,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 661 GetRequests, 589 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2022-07-20 20:58:32,207 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 2197 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 347 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2197 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 1075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 347 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-20 20:58:32,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2197 Valid, 173 Invalid, 1075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [347 Valid, 728 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-20 20:58:32,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2022-07-20 20:58:32,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 791. [2022-07-20 20:58:32,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 790 states have (on average 1.2734177215189872) internal successors, (1006), 790 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:32,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 1006 transitions. [2022-07-20 20:58:32,249 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 1006 transitions. Word has length 307 [2022-07-20 20:58:32,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:58:32,250 INFO L495 AbstractCegarLoop]: Abstraction has 791 states and 1006 transitions. [2022-07-20 20:58:32,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 5.283783783783784) internal successors, (391), 74 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:32,251 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 1006 transitions. [2022-07-20 20:58:32,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 577 [2022-07-20 20:58:32,260 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:58:32,261 INFO L195 NwaCegarLoop]: trace histogram [72, 71, 71, 71, 71, 71, 71, 71, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:58:32,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-20 20:58:32,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:58:32,476 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:58:32,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:58:32,476 INFO L85 PathProgramCache]: Analyzing trace with hash 823095820, now seen corresponding path program 4 times [2022-07-20 20:58:32,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:58:32,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798009587] [2022-07-20 20:58:32,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:58:32,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:58:32,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:58:34,579 INFO L134 CoverageAnalysis]: Checked inductivity of 20093 backedges. 0 proven. 12496 refuted. 0 times theorem prover too weak. 7597 trivial. 0 not checked. [2022-07-20 20:58:34,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:58:34,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798009587] [2022-07-20 20:58:34,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798009587] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:58:34,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78201923] [2022-07-20 20:58:34,581 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 20:58:34,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:58:34,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:58:34,584 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) [2022-07-20 20:58:34,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-20 20:58:34,870 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 20:58:34,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:58:34,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 1500 conjuncts, 73 conjunts are in the unsatisfiable core [2022-07-20 20:58:34,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:58:35,295 INFO L134 CoverageAnalysis]: Checked inductivity of 20093 backedges. 0 proven. 12496 refuted. 0 times theorem prover too weak. 7597 trivial. 0 not checked. [2022-07-20 20:58:35,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:58:40,500 INFO L134 CoverageAnalysis]: Checked inductivity of 20093 backedges. 0 proven. 12496 refuted. 0 times theorem prover too weak. 7597 trivial. 0 not checked. [2022-07-20 20:58:40,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78201923] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:58:40,500 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:58:40,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74, 74] total 147 [2022-07-20 20:58:40,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488536672] [2022-07-20 20:58:40,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:58:40,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 147 states [2022-07-20 20:58:40,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:58:40,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2022-07-20 20:58:40,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10731, Invalid=10731, Unknown=0, NotChecked=0, Total=21462 [2022-07-20 20:58:40,513 INFO L87 Difference]: Start difference. First operand 791 states and 1006 transitions. Second operand has 147 states, 147 states have (on average 4.9523809523809526) internal successors, (728), 147 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:49,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:58:49,216 INFO L93 Difference]: Finished difference Result 1813 states and 2393 transitions. [2022-07-20 20:58:49,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2022-07-20 20:58:49,217 INFO L78 Accepts]: Start accepts. Automaton has has 147 states, 147 states have (on average 4.9523809523809526) internal successors, (728), 147 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 576 [2022-07-20 20:58:49,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:58:49,228 INFO L225 Difference]: With dead ends: 1813 [2022-07-20 20:58:49,228 INFO L226 Difference]: Without dead ends: 1593 [2022-07-20 20:58:49,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1224 GetRequests, 1079 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=10731, Invalid=10731, Unknown=0, NotChecked=0, Total=21462 [2022-07-20 20:58:49,234 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 5266 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 1461 mSolverCounterSat, 1060 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5266 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 2521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1060 IncrementalHoareTripleChecker+Valid, 1461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-20 20:58:49,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5266 Valid, 315 Invalid, 2521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1060 Valid, 1461 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-20 20:58:49,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1593 states. [2022-07-20 20:58:49,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1593 to 1378. [2022-07-20 20:58:49,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1378 states, 1377 states have (on average 1.3159041394335511) internal successors, (1812), 1377 states have internal predecessors, (1812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:49,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1378 states to 1378 states and 1812 transitions. [2022-07-20 20:58:49,280 INFO L78 Accepts]: Start accepts. Automaton has 1378 states and 1812 transitions. Word has length 576 [2022-07-20 20:58:49,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:58:49,281 INFO L495 AbstractCegarLoop]: Abstraction has 1378 states and 1812 transitions. [2022-07-20 20:58:49,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 147 states, 147 states have (on average 4.9523809523809526) internal successors, (728), 147 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:49,281 INFO L276 IsEmpty]: Start isEmpty. Operand 1378 states and 1812 transitions. [2022-07-20 20:58:49,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 945 [2022-07-20 20:58:49,310 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:58:49,311 INFO L195 NwaCegarLoop]: trace histogram [144, 144, 144, 144, 144, 73, 72, 72, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:58:49,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-20 20:58:49,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:58:49,530 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:58:49,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:58:49,531 INFO L85 PathProgramCache]: Analyzing trace with hash -361923806, now seen corresponding path program 5 times [2022-07-20 20:58:49,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:58:49,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791510193] [2022-07-20 20:58:49,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:58:49,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:58:49,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:58:56,591 INFO L134 CoverageAnalysis]: Checked inductivity of 59436 backedges. 0 proven. 51624 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2022-07-20 20:58:56,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:58:56,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791510193] [2022-07-20 20:58:56,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791510193] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:58:56,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446527250] [2022-07-20 20:58:56,593 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 20:58:56,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:58:56,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:58:56,600 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) [2022-07-20 20:58:56,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process