./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/reducercommutativity/sep.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/reducercommutativity/sep.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 54d2da4a9e5a645ffa7361038eff25cc32e29a265e0324de9bda9a6d773becac --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 10:03:45,159 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 10:03:45,188 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 10:03:45,224 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 10:03:45,225 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 10:03:45,226 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 10:03:45,227 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 10:03:45,229 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 10:03:45,230 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 10:03:45,233 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 10:03:45,233 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 10:03:45,235 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 10:03:45,235 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 10:03:45,237 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 10:03:45,237 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 10:03:45,243 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 10:03:45,243 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 10:03:45,244 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 10:03:45,245 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 10:03:45,248 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 10:03:45,250 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 10:03:45,251 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 10:03:45,251 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 10:03:45,252 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 10:03:45,253 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 10:03:45,258 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 10:03:45,263 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 10:03:45,263 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 10:03:45,264 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 10:03:45,264 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 10:03:45,265 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 10:03:45,265 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 10:03:45,266 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 10:03:45,267 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 10:03:45,267 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 10:03:45,268 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 10:03:45,268 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 10:03:45,269 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 10:03:45,269 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 10:03:45,269 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 10:03:45,269 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 10:03:45,271 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 10:03:45,272 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 10:03:45,287 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 10:03:45,289 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 10:03:45,290 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 10:03:45,290 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 10:03:45,290 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 10:03:45,290 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 10:03:45,291 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 10:03:45,291 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 10:03:45,291 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 10:03:45,292 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 10:03:45,292 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 10:03:45,292 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 10:03:45,292 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 10:03:45,292 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 10:03:45,293 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 10:03:45,293 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 10:03:45,293 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 10:03:45,293 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 10:03:45,293 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 10:03:45,293 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 10:03:45,294 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 10:03:45,294 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 10:03:45,295 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 10:03:45,295 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 10:03:45,295 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 10:03:45,295 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 10:03:45,295 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 10:03:45,296 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 10:03:45,296 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 10:03:45,296 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 10:03:45,296 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 10:03:45,296 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 10:03:45,296 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 10:03:45,296 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 54d2da4a9e5a645ffa7361038eff25cc32e29a265e0324de9bda9a6d773becac [2022-07-13 10:03:45,453 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 10:03:45,466 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 10:03:45,468 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 10:03:45,469 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 10:03:45,470 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 10:03:45,471 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/sep.i [2022-07-13 10:03:45,515 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/267edc64d/d252e0a88fdd421ca8d5b8423b9bed68/FLAG0f9d17345 [2022-07-13 10:03:45,870 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 10:03:45,871 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/sep.i [2022-07-13 10:03:45,876 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/267edc64d/d252e0a88fdd421ca8d5b8423b9bed68/FLAG0f9d17345 [2022-07-13 10:03:45,884 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/267edc64d/d252e0a88fdd421ca8d5b8423b9bed68 [2022-07-13 10:03:45,886 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 10:03:45,888 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 10:03:45,890 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 10:03:45,890 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 10:03:45,892 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 10:03:45,892 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:03:45" (1/1) ... [2022-07-13 10:03:45,893 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fcd4704 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:03:45, skipping insertion in model container [2022-07-13 10:03:45,894 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:03:45" (1/1) ... [2022-07-13 10:03:45,898 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 10:03:45,910 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 10:03:46,039 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/reducercommutativity/sep.i[1298,1311] [2022-07-13 10:03:46,041 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 10:03:46,046 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 10:03:46,058 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/reducercommutativity/sep.i[1298,1311] [2022-07-13 10:03:46,059 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 10:03:46,067 INFO L208 MainTranslator]: Completed translation [2022-07-13 10:03:46,068 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:03:46 WrapperNode [2022-07-13 10:03:46,068 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 10:03:46,069 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 10:03:46,069 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 10:03:46,069 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 10:03:46,080 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:03:46" (1/1) ... [2022-07-13 10:03:46,085 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:03:46" (1/1) ... [2022-07-13 10:03:46,097 INFO L137 Inliner]: procedures = 16, calls = 26, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 65 [2022-07-13 10:03:46,097 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 10:03:46,098 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 10:03:46,098 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 10:03:46,098 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 10:03:46,103 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:03:46" (1/1) ... [2022-07-13 10:03:46,103 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:03:46" (1/1) ... [2022-07-13 10:03:46,105 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:03:46" (1/1) ... [2022-07-13 10:03:46,105 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:03:46" (1/1) ... [2022-07-13 10:03:46,108 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:03:46" (1/1) ... [2022-07-13 10:03:46,111 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:03:46" (1/1) ... [2022-07-13 10:03:46,112 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:03:46" (1/1) ... [2022-07-13 10:03:46,113 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 10:03:46,114 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 10:03:46,114 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 10:03:46,114 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 10:03:46,115 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:03:46" (1/1) ... [2022-07-13 10:03:46,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 10:03:46,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:03:46,138 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-13 10:03:46,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-13 10:03:46,195 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 10:03:46,195 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 10:03:46,195 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 10:03:46,195 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 10:03:46,196 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 10:03:46,196 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 10:03:46,196 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 10:03:46,196 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 10:03:46,196 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2022-07-13 10:03:46,196 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2022-07-13 10:03:46,257 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 10:03:46,258 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 10:03:46,387 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 10:03:46,406 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 10:03:46,406 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-13 10:03:46,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:03:46 BoogieIcfgContainer [2022-07-13 10:03:46,408 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 10:03:46,409 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 10:03:46,409 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 10:03:46,411 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 10:03:46,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 10:03:45" (1/3) ... [2022-07-13 10:03:46,412 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a6f7835 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:03:46, skipping insertion in model container [2022-07-13 10:03:46,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:03:46" (2/3) ... [2022-07-13 10:03:46,413 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a6f7835 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:03:46, skipping insertion in model container [2022-07-13 10:03:46,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:03:46" (3/3) ... [2022-07-13 10:03:46,414 INFO L111 eAbstractionObserver]: Analyzing ICFG sep.i [2022-07-13 10:03:46,423 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 10:03:46,423 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 10:03:46,466 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 10:03:46,471 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@34d0b37b, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7d54319 [2022-07-13 10:03:46,476 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 10:03:46,480 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 21 states have (on average 1.380952380952381) internal successors, (29), 22 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 10:03:46,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-13 10:03:46,487 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:03:46,487 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:03:46,488 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:03:46,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:03:46,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1158480486, now seen corresponding path program 1 times [2022-07-13 10:03:46,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:03:46,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340855619] [2022-07-13 10:03:46,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:03:46,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:03:46,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:46,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 10:03:46,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:46,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 10:03:46,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:46,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 10:03:46,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:46,753 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-13 10:03:46,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:03:46,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340855619] [2022-07-13 10:03:46,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340855619] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:03:46,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898983687] [2022-07-13 10:03:46,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:03:46,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:03:46,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:03:46,761 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:03:46,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 10:03:46,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:46,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 1 conjunts are in the unsatisfiable core [2022-07-13 10:03:46,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:03:46,841 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 10:03:46,841 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 10:03:46,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898983687] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 10:03:46,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 10:03:46,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 5 [2022-07-13 10:03:46,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065127031] [2022-07-13 10:03:46,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 10:03:46,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 10:03:46,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:03:46,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 10:03:46,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 10:03:46,867 INFO L87 Difference]: Start difference. First operand has 27 states, 21 states have (on average 1.380952380952381) internal successors, (29), 22 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-13 10:03:46,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:03:46,888 INFO L93 Difference]: Finished difference Result 50 states and 67 transitions. [2022-07-13 10:03:46,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 10:03:46,890 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2022-07-13 10:03:46,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:03:46,894 INFO L225 Difference]: With dead ends: 50 [2022-07-13 10:03:46,895 INFO L226 Difference]: Without dead ends: 22 [2022-07-13 10:03:46,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 10:03:46,901 INFO L413 NwaCegarLoop]: 32 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, 32 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 [2022-07-13 10:03:46,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 10:03:46,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-07-13 10:03:46,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-07-13 10:03:46,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 10:03:46,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2022-07-13 10:03:46,935 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 28 [2022-07-13 10:03:46,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:03:46,937 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2022-07-13 10:03:46,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-13 10:03:46,938 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2022-07-13 10:03:46,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-13 10:03:46,940 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:03:46,941 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:03:46,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 10:03:47,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-07-13 10:03:47,157 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:03:47,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:03:47,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1033293076, now seen corresponding path program 1 times [2022-07-13 10:03:47,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:03:47,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340530338] [2022-07-13 10:03:47,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:03:47,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:03:47,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:47,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 10:03:47,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:47,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 10:03:47,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:47,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 10:03:47,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:47,249 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-13 10:03:47,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:03:47,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340530338] [2022-07-13 10:03:47,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340530338] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:03:47,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021202417] [2022-07-13 10:03:47,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:03:47,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:03:47,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:03:47,251 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:03:47,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 10:03:47,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:47,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 10:03:47,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:03:47,338 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-13 10:03:47,338 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 10:03:47,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021202417] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 10:03:47,339 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 10:03:47,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2022-07-13 10:03:47,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889580911] [2022-07-13 10:03:47,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 10:03:47,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 10:03:47,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:03:47,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 10:03:47,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-13 10:03:47,341 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-13 10:03:47,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:03:47,379 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2022-07-13 10:03:47,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 10:03:47,380 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2022-07-13 10:03:47,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:03:47,380 INFO L225 Difference]: With dead ends: 43 [2022-07-13 10:03:47,380 INFO L226 Difference]: Without dead ends: 25 [2022-07-13 10:03:47,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-13 10:03:47,382 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 28 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 10:03:47,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 30 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 10:03:47,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-07-13 10:03:47,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2022-07-13 10:03:47,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 10:03:47,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-07-13 10:03:47,392 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 28 [2022-07-13 10:03:47,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:03:47,392 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-07-13 10:03:47,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-13 10:03:47,393 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-07-13 10:03:47,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-13 10:03:47,395 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:03:47,395 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:03:47,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 10:03:47,610 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,SelfDestructingSolverStorable1 [2022-07-13 10:03:47,611 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:03:47,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:03:47,611 INFO L85 PathProgramCache]: Analyzing trace with hash -14370886, now seen corresponding path program 1 times [2022-07-13 10:03:47,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:03:47,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522912061] [2022-07-13 10:03:47,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:03:47,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:03:47,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:47,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 10:03:47,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:47,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:03:47,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:47,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-13 10:03:47,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:47,712 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-13 10:03:47,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:03:47,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522912061] [2022-07-13 10:03:47,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522912061] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 10:03:47,713 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 10:03:47,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 10:03:47,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981400431] [2022-07-13 10:03:47,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 10:03:47,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 10:03:47,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:03:47,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 10:03:47,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 10:03:47,714 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-13 10:03:47,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:03:47,739 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2022-07-13 10:03:47,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 10:03:47,739 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2022-07-13 10:03:47,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:03:47,740 INFO L225 Difference]: With dead ends: 39 [2022-07-13 10:03:47,740 INFO L226 Difference]: Without dead ends: 25 [2022-07-13 10:03:47,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 10:03:47,742 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 21 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 10:03:47,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 30 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 10:03:47,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-07-13 10:03:47,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-07-13 10:03:47,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 10:03:47,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-07-13 10:03:47,746 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 37 [2022-07-13 10:03:47,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:03:47,746 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-07-13 10:03:47,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-13 10:03:47,746 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-07-13 10:03:47,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-13 10:03:47,747 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:03:47,748 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:03:47,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 10:03:47,748 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:03:47,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:03:47,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1444896732, now seen corresponding path program 1 times [2022-07-13 10:03:47,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:03:47,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202646263] [2022-07-13 10:03:47,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:03:47,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:03:47,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:47,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 10:03:47,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:47,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:03:47,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:47,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 10:03:47,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:47,856 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-13 10:03:47,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:03:47,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202646263] [2022-07-13 10:03:47,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202646263] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:03:47,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526972438] [2022-07-13 10:03:47,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:03:47,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:03:47,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:03:47,858 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:03:47,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 10:03:47,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:47,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 10:03:47,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:03:47,974 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-13 10:03:47,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:03:48,081 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-13 10:03:48,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526972438] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:03:48,082 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:03:48,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 10 [2022-07-13 10:03:48,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571798859] [2022-07-13 10:03:48,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:03:48,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 10:03:48,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:03:48,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 10:03:48,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-07-13 10:03:48,084 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-13 10:03:48,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:03:48,139 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2022-07-13 10:03:48,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 10:03:48,140 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2022-07-13 10:03:48,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:03:48,141 INFO L225 Difference]: With dead ends: 49 [2022-07-13 10:03:48,141 INFO L226 Difference]: Without dead ends: 29 [2022-07-13 10:03:48,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 77 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-07-13 10:03:48,142 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 28 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 10:03:48,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 65 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 10:03:48,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-07-13 10:03:48,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2022-07-13 10:03:48,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 10:03:48,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2022-07-13 10:03:48,147 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 39 [2022-07-13 10:03:48,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:03:48,147 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2022-07-13 10:03:48,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-13 10:03:48,147 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2022-07-13 10:03:48,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-13 10:03:48,148 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:03:48,148 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:03:48,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 10:03:48,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:03:48,364 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:03:48,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:03:48,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1089239822, now seen corresponding path program 2 times [2022-07-13 10:03:48,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:03:48,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086543971] [2022-07-13 10:03:48,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:03:48,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:03:48,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:48,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 10:03:48,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:48,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-13 10:03:48,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:48,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-13 10:03:48,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:48,911 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 3 proven. 48 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-13 10:03:48,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:03:48,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086543971] [2022-07-13 10:03:48,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086543971] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:03:48,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145236060] [2022-07-13 10:03:48,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 10:03:48,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:03:48,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:03:48,915 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:03:48,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 10:03:48,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 10:03:48,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:03:48,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-13 10:03:48,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:03:49,330 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-13 10:03:49,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:03:49,588 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-13 10:03:49,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145236060] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:03:49,588 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:03:49,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 18 [2022-07-13 10:03:49,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234310454] [2022-07-13 10:03:49,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:03:49,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 10:03:49,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:03:49,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 10:03:49,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-07-13 10:03:49,590 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 14 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-13 10:03:49,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:03:49,739 INFO L93 Difference]: Finished difference Result 73 states and 101 transitions. [2022-07-13 10:03:49,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-13 10:03:49,740 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 14 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 48 [2022-07-13 10:03:49,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:03:49,746 INFO L225 Difference]: With dead ends: 73 [2022-07-13 10:03:49,746 INFO L226 Difference]: Without dead ends: 69 [2022-07-13 10:03:49,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 87 SyntacticMatches, 14 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2022-07-13 10:03:49,749 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 35 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 10:03:49,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 478 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 10:03:49,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-07-13 10:03:49,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 49. [2022-07-13 10:03:49,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 42 states have internal predecessors, (52), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-07-13 10:03:49,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 66 transitions. [2022-07-13 10:03:49,774 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 66 transitions. Word has length 48 [2022-07-13 10:03:49,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:03:49,775 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 66 transitions. [2022-07-13 10:03:49,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 14 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-13 10:03:49,775 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 66 transitions. [2022-07-13 10:03:49,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-13 10:03:49,781 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:03:49,781 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:03:49,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 10:03:49,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:03:49,982 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:03:49,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:03:49,983 INFO L85 PathProgramCache]: Analyzing trace with hash -409181452, now seen corresponding path program 1 times [2022-07-13 10:03:49,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:03:49,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204802247] [2022-07-13 10:03:49,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:03:49,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:03:50,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:50,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 10:03:50,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:50,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-13 10:03:50,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:50,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-13 10:03:50,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:50,371 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 16 proven. 58 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 10:03:50,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:03:50,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204802247] [2022-07-13 10:03:50,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204802247] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:03:50,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731621811] [2022-07-13 10:03:50,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:03:50,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:03:50,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:03:50,374 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:03:50,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 10:03:50,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:50,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-13 10:03:50,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:03:50,635 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 11 [2022-07-13 10:03:50,662 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-07-13 10:03:51,048 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 69 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 10:03:51,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:03:51,212 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 19 treesize of output 17 [2022-07-13 10:03:51,217 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 38 treesize of output 34 [2022-07-13 10:03:51,306 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 10 treesize of output 6 [2022-07-13 10:03:51,428 INFO L356 Elim1Store]: treesize reduction 4, result has 73.3 percent of original size [2022-07-13 10:03:51,429 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-07-13 10:03:51,559 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 4 proven. 69 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 10:03:51,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731621811] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:03:51,560 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:03:51,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 18] total 45 [2022-07-13 10:03:51,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865451841] [2022-07-13 10:03:51,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:03:51,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-13 10:03:51,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:03:51,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-13 10:03:51,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=1701, Unknown=0, NotChecked=0, Total=1980 [2022-07-13 10:03:51,562 INFO L87 Difference]: Start difference. First operand 49 states and 66 transitions. Second operand has 45 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 42 states have internal predecessors, (101), 7 states have call successors, (9), 4 states have call predecessors, (9), 7 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) [2022-07-13 10:03:56,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:03:56,647 INFO L93 Difference]: Finished difference Result 274 states and 426 transitions. [2022-07-13 10:03:56,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-07-13 10:03:56,648 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 42 states have internal predecessors, (101), 7 states have call successors, (9), 4 states have call predecessors, (9), 7 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) Word has length 48 [2022-07-13 10:03:56,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:03:56,651 INFO L225 Difference]: With dead ends: 274 [2022-07-13 10:03:56,652 INFO L226 Difference]: Without dead ends: 225 [2022-07-13 10:03:56,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 79 SyntacticMatches, 6 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4146 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1967, Invalid=10240, Unknown=3, NotChecked=0, Total=12210 [2022-07-13 10:03:56,656 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 278 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 943 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 1524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 362 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-13 10:03:56,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 341 Invalid, 1524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 943 Invalid, 0 Unknown, 362 Unchecked, 0.6s Time] [2022-07-13 10:03:56,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-07-13 10:03:56,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 161. [2022-07-13 10:03:56,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 139 states have (on average 1.330935251798561) internal successors, (185), 143 states have internal predecessors, (185), 13 states have call successors, (13), 4 states have call predecessors, (13), 8 states have return successors, (54), 13 states have call predecessors, (54), 13 states have call successors, (54) [2022-07-13 10:03:56,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 252 transitions. [2022-07-13 10:03:56,685 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 252 transitions. Word has length 48 [2022-07-13 10:03:56,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:03:56,686 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 252 transitions. [2022-07-13 10:03:56,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 42 states have internal predecessors, (101), 7 states have call successors, (9), 4 states have call predecessors, (9), 7 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) [2022-07-13 10:03:56,686 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 252 transitions. [2022-07-13 10:03:56,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-13 10:03:56,693 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:03:56,693 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:03:56,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-13 10:03:56,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:03:56,924 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:03:56,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:03:56,924 INFO L85 PathProgramCache]: Analyzing trace with hash 296963572, now seen corresponding path program 2 times [2022-07-13 10:03:56,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:03:56,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77709633] [2022-07-13 10:03:56,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:03:56,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:03:56,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:56,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 10:03:56,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:57,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-13 10:03:57,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:57,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-13 10:03:57,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:57,108 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 2 proven. 67 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-13 10:03:57,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:03:57,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77709633] [2022-07-13 10:03:57,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77709633] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:03:57,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558873117] [2022-07-13 10:03:57,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 10:03:57,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:03:57,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:03:57,110 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:03:57,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 10:03:57,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 10:03:57,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:03:57,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-13 10:03:57,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:03:57,392 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 18 treesize of output 10 [2022-07-13 10:03:57,443 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-07-13 10:04:06,468 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 69 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 10:04:06,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:04:06,709 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 20 treesize of output 18 [2022-07-13 10:04:06,712 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 40 treesize of output 36 [2022-07-13 10:04:06,827 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 9 treesize of output 5 [2022-07-13 10:04:09,025 INFO L356 Elim1Store]: treesize reduction 4, result has 73.3 percent of original size [2022-07-13 10:04:09,026 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-07-13 10:04:09,195 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 4 proven. 69 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 10:04:09,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558873117] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:04:09,196 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:04:09,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20, 18] total 44 [2022-07-13 10:04:09,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135294651] [2022-07-13 10:04:09,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:04:09,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-13 10:04:09,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:04:09,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-13 10:04:09,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1649, Unknown=4, NotChecked=0, Total=1892 [2022-07-13 10:04:09,198 INFO L87 Difference]: Start difference. First operand 161 states and 252 transitions. Second operand has 44 states, 39 states have (on average 2.717948717948718) internal successors, (106), 40 states have internal predecessors, (106), 9 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-13 10:05:18,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:05:18,730 INFO L93 Difference]: Finished difference Result 613 states and 960 transitions. [2022-07-13 10:05:18,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-07-13 10:05:18,730 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 39 states have (on average 2.717948717948718) internal successors, (106), 40 states have internal predecessors, (106), 9 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) Word has length 48 [2022-07-13 10:05:18,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:05:18,736 INFO L225 Difference]: With dead ends: 613 [2022-07-13 10:05:18,736 INFO L226 Difference]: Without dead ends: 475 [2022-07-13 10:05:18,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 88 SyntacticMatches, 9 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6700 ImplicationChecksByTransitivity, 80.0s TimeCoverageRelationStatistics Valid=2657, Invalid=15944, Unknown=31, NotChecked=0, Total=18632 [2022-07-13 10:05:18,741 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 386 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 1170 mSolverCounterSat, 401 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 2272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 401 IncrementalHoareTripleChecker+Valid, 1170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 701 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-13 10:05:18,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [407 Valid, 435 Invalid, 2272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [401 Valid, 1170 Invalid, 0 Unknown, 701 Unchecked, 0.9s Time] [2022-07-13 10:05:18,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2022-07-13 10:05:18,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 280. [2022-07-13 10:05:18,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 242 states have (on average 1.3512396694214877) internal successors, (327), 252 states have internal predecessors, (327), 21 states have call successors, (21), 6 states have call predecessors, (21), 16 states have return successors, (119), 21 states have call predecessors, (119), 21 states have call successors, (119) [2022-07-13 10:05:18,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 467 transitions. [2022-07-13 10:05:18,785 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 467 transitions. Word has length 48 [2022-07-13 10:05:18,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:05:18,786 INFO L495 AbstractCegarLoop]: Abstraction has 280 states and 467 transitions. [2022-07-13 10:05:18,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 39 states have (on average 2.717948717948718) internal successors, (106), 40 states have internal predecessors, (106), 9 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-13 10:05:18,786 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 467 transitions. [2022-07-13 10:05:18,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-13 10:05:18,788 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:05:18,788 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:05:18,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-13 10:05:18,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:05:19,000 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:05:19,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:05:19,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1360360308, now seen corresponding path program 3 times [2022-07-13 10:05:19,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:05:19,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299080197] [2022-07-13 10:05:19,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:05:19,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:05:19,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:05:19,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 10:05:19,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:05:19,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-13 10:05:19,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:05:19,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-13 10:05:19,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:05:19,204 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 2 proven. 67 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-13 10:05:19,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:05:19,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299080197] [2022-07-13 10:05:19,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299080197] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:05:19,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183980232] [2022-07-13 10:05:19,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 10:05:19,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:05:19,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:05:19,207 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:05:19,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-13 10:05:19,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-13 10:05:19,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:05:19,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-13 10:05:19,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:05:19,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:05:19,498 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 35 treesize of output 23 [2022-07-13 10:05:19,621 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 18 treesize of output 10 [2022-07-13 10:05:19,661 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-07-13 10:05:20,058 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 2 proven. 71 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 10:05:20,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:05:20,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183980232] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:05:20,138 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:05:20,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 31 [2022-07-13 10:05:20,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84601988] [2022-07-13 10:05:20,139 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:05:20,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-13 10:05:20,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:05:20,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-13 10:05:20,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2022-07-13 10:05:20,140 INFO L87 Difference]: Start difference. First operand 280 states and 467 transitions. Second operand has 31 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 27 states have internal predecessors, (72), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-13 10:05:21,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:05:21,175 INFO L93 Difference]: Finished difference Result 665 states and 1063 transitions. [2022-07-13 10:05:21,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-13 10:05:21,180 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 27 states have internal predecessors, (72), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) Word has length 48 [2022-07-13 10:05:21,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:05:21,183 INFO L225 Difference]: With dead ends: 665 [2022-07-13 10:05:21,183 INFO L226 Difference]: Without dead ends: 407 [2022-07-13 10:05:21,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=418, Invalid=3122, Unknown=0, NotChecked=0, Total=3540 [2022-07-13 10:05:21,186 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 137 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 1262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 692 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 10:05:21,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 366 Invalid, 1262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 496 Invalid, 0 Unknown, 692 Unchecked, 0.3s Time] [2022-07-13 10:05:21,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-07-13 10:05:21,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 344. [2022-07-13 10:05:21,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 298 states have (on average 1.3389261744966443) internal successors, (399), 308 states have internal predecessors, (399), 26 states have call successors, (26), 9 states have call predecessors, (26), 19 states have return successors, (158), 26 states have call predecessors, (158), 26 states have call successors, (158) [2022-07-13 10:05:21,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 583 transitions. [2022-07-13 10:05:21,229 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 583 transitions. Word has length 48 [2022-07-13 10:05:21,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:05:21,229 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 583 transitions. [2022-07-13 10:05:21,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 27 states have internal predecessors, (72), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-13 10:05:21,230 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 583 transitions. [2022-07-13 10:05:21,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-13 10:05:21,232 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:05:21,232 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:05:21,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-13 10:05:21,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:05:21,440 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:05:21,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:05:21,440 INFO L85 PathProgramCache]: Analyzing trace with hash -868345224, now seen corresponding path program 4 times [2022-07-13 10:05:21,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:05:21,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048431909] [2022-07-13 10:05:21,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:05:21,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:05:21,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:05:21,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 10:05:21,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:05:21,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-13 10:05:21,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:05:21,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-13 10:05:21,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:05:21,634 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-13 10:05:21,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:05:21,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048431909] [2022-07-13 10:05:21,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048431909] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:05:21,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569452811] [2022-07-13 10:05:21,635 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 10:05:21,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:05:21,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:05:21,636 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:05:21,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-13 10:05:21,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 10:05:21,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:05:21,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-13 10:05:21,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:05:21,952 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-07-13 10:05:21,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:05:22,138 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-07-13 10:05:22,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569452811] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:05:22,138 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:05:22,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 18 [2022-07-13 10:05:22,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451640492] [2022-07-13 10:05:22,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:05:22,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 10:05:22,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:05:22,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 10:05:22,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-07-13 10:05:22,139 INFO L87 Difference]: Start difference. First operand 344 states and 583 transitions. Second operand has 18 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 14 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-13 10:05:22,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:05:22,299 INFO L93 Difference]: Finished difference Result 578 states and 1173 transitions. [2022-07-13 10:05:22,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-13 10:05:22,300 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 14 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 48 [2022-07-13 10:05:22,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:05:22,308 INFO L225 Difference]: With dead ends: 578 [2022-07-13 10:05:22,309 INFO L226 Difference]: Without dead ends: 574 [2022-07-13 10:05:22,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 89 SyntacticMatches, 12 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2022-07-13 10:05:22,312 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 26 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 10:05:22,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 606 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 10:05:22,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2022-07-13 10:05:22,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 446. [2022-07-13 10:05:22,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 388 states have (on average 1.3685567010309279) internal successors, (531), 403 states have internal predecessors, (531), 33 states have call successors, (33), 9 states have call predecessors, (33), 24 states have return successors, (259), 33 states have call predecessors, (259), 33 states have call successors, (259) [2022-07-13 10:05:22,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 823 transitions. [2022-07-13 10:05:22,381 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 823 transitions. Word has length 48 [2022-07-13 10:05:22,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:05:22,381 INFO L495 AbstractCegarLoop]: Abstraction has 446 states and 823 transitions. [2022-07-13 10:05:22,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 14 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-13 10:05:22,381 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 823 transitions. [2022-07-13 10:05:22,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-13 10:05:22,385 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:05:22,386 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:05:22,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-13 10:05:22,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-07-13 10:05:22,603 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:05:22,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:05:22,603 INFO L85 PathProgramCache]: Analyzing trace with hash -610179786, now seen corresponding path program 5 times [2022-07-13 10:05:22,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:05:22,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087512720] [2022-07-13 10:05:22,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:05:22,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:05:22,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:05:22,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 10:05:22,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:05:22,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-13 10:05:22,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:05:22,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-13 10:05:22,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:05:23,076 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 20 proven. 49 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-13 10:05:23,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:05:23,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087512720] [2022-07-13 10:05:23,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087512720] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:05:23,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969817614] [2022-07-13 10:05:23,076 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 10:05:23,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:05:23,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:05:23,084 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:05:23,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-13 10:05:23,143 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-13 10:05:23,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:05:23,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-13 10:05:23,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:05:23,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:05:23,203 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2022-07-13 10:05:23,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:05:23,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:05:23,361 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 10:05:23,362 INFO L356 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2022-07-13 10:05:23,363 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-07-13 10:05:23,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:05:23,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:05:23,437 INFO L356 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2022-07-13 10:05:23,437 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 43 [2022-07-13 10:05:23,585 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 19 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 10:05:23,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:05:25,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969817614] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:05:25,221 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:05:25,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20] total 34 [2022-07-13 10:05:25,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486217145] [2022-07-13 10:05:25,221 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:05:25,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-13 10:05:25,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:05:25,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-13 10:05:25,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1438, Unknown=2, NotChecked=0, Total=1640 [2022-07-13 10:05:25,222 INFO L87 Difference]: Start difference. First operand 446 states and 823 transitions. Second operand has 34 states, 32 states have (on average 2.3125) internal successors, (74), 32 states have internal predecessors, (74), 5 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-13 10:05:26,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:05:26,925 INFO L93 Difference]: Finished difference Result 972 states and 1642 transitions. [2022-07-13 10:05:26,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-07-13 10:05:26,926 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 2.3125) internal successors, (74), 32 states have internal predecessors, (74), 5 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 48 [2022-07-13 10:05:26,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:05:26,930 INFO L225 Difference]: With dead ends: 972 [2022-07-13 10:05:26,930 INFO L226 Difference]: Without dead ends: 673 [2022-07-13 10:05:26,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 49 SyntacticMatches, 7 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2138 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=842, Invalid=6128, Unknown=2, NotChecked=0, Total=6972 [2022-07-13 10:05:26,935 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 225 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 1231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 305 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-13 10:05:26,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 360 Invalid, 1231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 722 Invalid, 0 Unknown, 305 Unchecked, 0.6s Time] [2022-07-13 10:05:26,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2022-07-13 10:05:26,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 470. [2022-07-13 10:05:26,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 413 states have (on average 1.3438256658595642) internal successors, (555), 424 states have internal predecessors, (555), 32 states have call successors, (32), 15 states have call predecessors, (32), 24 states have return successors, (186), 30 states have call predecessors, (186), 32 states have call successors, (186) [2022-07-13 10:05:27,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 773 transitions. [2022-07-13 10:05:27,002 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 773 transitions. Word has length 48 [2022-07-13 10:05:27,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:05:27,002 INFO L495 AbstractCegarLoop]: Abstraction has 470 states and 773 transitions. [2022-07-13 10:05:27,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 2.3125) internal successors, (74), 32 states have internal predecessors, (74), 5 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-13 10:05:27,002 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 773 transitions. [2022-07-13 10:05:27,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-13 10:05:27,004 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:05:27,004 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:05:27,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-13 10:05:27,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-13 10:05:27,219 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:05:27,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:05:27,219 INFO L85 PathProgramCache]: Analyzing trace with hash -779053714, now seen corresponding path program 6 times [2022-07-13 10:05:27,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:05:27,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271110178] [2022-07-13 10:05:27,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:05:27,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:05:27,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:05:27,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 10:05:27,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:05:27,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-13 10:05:27,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:05:27,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-13 10:05:27,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:05:27,696 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 9 proven. 67 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 10:05:27,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:05:27,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271110178] [2022-07-13 10:05:27,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271110178] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:05:27,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660121165] [2022-07-13 10:05:27,697 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 10:05:27,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:05:27,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:05:27,699 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:05:27,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-13 10:05:27,839 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-13 10:05:27,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:05:27,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-13 10:05:27,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:05:27,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:05:27,973 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 31 treesize of output 23 [2022-07-13 10:05:28,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:05:28,109 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 30 treesize of output 23 [2022-07-13 10:05:28,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:05:28,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:05:28,168 INFO L356 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2022-07-13 10:05:28,169 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 44 [2022-07-13 10:05:28,317 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 1 proven. 69 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 10:05:28,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:05:29,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660121165] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:05:29,194 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:05:29,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17] total 35 [2022-07-13 10:05:29,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776344053] [2022-07-13 10:05:29,194 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:05:29,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-13 10:05:29,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:05:29,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-13 10:05:29,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1527, Unknown=1, NotChecked=0, Total=1722 [2022-07-13 10:05:29,195 INFO L87 Difference]: Start difference. First operand 470 states and 773 transitions. Second operand has 35 states, 33 states have (on average 2.242424242424242) internal successors, (74), 31 states have internal predecessors, (74), 5 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-13 10:05:31,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:05:31,827 INFO L93 Difference]: Finished difference Result 1182 states and 1849 transitions. [2022-07-13 10:05:31,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-07-13 10:05:31,828 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 2.242424242424242) internal successors, (74), 31 states have internal predecessors, (74), 5 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 48 [2022-07-13 10:05:31,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:05:31,833 INFO L225 Difference]: With dead ends: 1182 [2022-07-13 10:05:31,833 INFO L226 Difference]: Without dead ends: 984 [2022-07-13 10:05:31,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4732 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1290, Invalid=12281, Unknown=1, NotChecked=0, Total=13572 [2022-07-13 10:05:31,839 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 172 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 861 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 1982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 975 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 10:05:31,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 548 Invalid, 1982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 861 Invalid, 0 Unknown, 975 Unchecked, 0.5s Time] [2022-07-13 10:05:31,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2022-07-13 10:05:31,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 735. [2022-07-13 10:05:31,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 735 states, 649 states have (on average 1.3343605546995378) internal successors, (866), 671 states have internal predecessors, (866), 43 states have call successors, (43), 21 states have call predecessors, (43), 42 states have return successors, (255), 42 states have call predecessors, (255), 43 states have call successors, (255) [2022-07-13 10:05:31,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 1164 transitions. [2022-07-13 10:05:31,909 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 1164 transitions. Word has length 48 [2022-07-13 10:05:31,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:05:31,910 INFO L495 AbstractCegarLoop]: Abstraction has 735 states and 1164 transitions. [2022-07-13 10:05:31,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 2.242424242424242) internal successors, (74), 31 states have internal predecessors, (74), 5 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-13 10:05:31,910 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 1164 transitions. [2022-07-13 10:05:31,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-13 10:05:31,912 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:05:31,912 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:05:31,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-13 10:05:32,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-13 10:05:32,127 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:05:32,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:05:32,128 INFO L85 PathProgramCache]: Analyzing trace with hash -299993678, now seen corresponding path program 1 times [2022-07-13 10:05:32,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:05:32,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621647715] [2022-07-13 10:05:32,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:05:32,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:05:32,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:05:32,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 10:05:32,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:05:32,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-13 10:05:32,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:05:32,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-13 10:05:32,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:05:32,340 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-13 10:05:32,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:05:32,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621647715] [2022-07-13 10:05:32,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621647715] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:05:32,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156564698] [2022-07-13 10:05:32,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:05:32,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:05:32,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:05:32,342 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:05:32,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-13 10:05:32,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:05:32,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-13 10:05:32,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:05:32,764 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-13 10:05:32,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:05:32,999 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-13 10:05:33,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156564698] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:05:33,000 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:05:33,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 17 [2022-07-13 10:05:33,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165706025] [2022-07-13 10:05:33,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:05:33,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-13 10:05:33,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:05:33,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-13 10:05:33,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2022-07-13 10:05:33,001 INFO L87 Difference]: Start difference. First operand 735 states and 1164 transitions. Second operand has 17 states, 16 states have (on average 2.0625) internal successors, (33), 13 states have internal predecessors, (33), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-13 10:05:33,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:05:33,171 INFO L93 Difference]: Finished difference Result 1018 states and 1838 transitions. [2022-07-13 10:05:33,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-13 10:05:33,172 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 13 states have internal predecessors, (33), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 48 [2022-07-13 10:05:33,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:05:33,179 INFO L225 Difference]: With dead ends: 1018 [2022-07-13 10:05:33,179 INFO L226 Difference]: Without dead ends: 1014 [2022-07-13 10:05:33,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 89 SyntacticMatches, 13 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-07-13 10:05:33,182 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 28 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 10:05:33,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 615 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 10:05:33,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1014 states. [2022-07-13 10:05:33,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1014 to 889. [2022-07-13 10:05:33,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 788 states have (on average 1.3565989847715736) internal successors, (1069), 819 states have internal predecessors, (1069), 50 states have call successors, (50), 21 states have call predecessors, (50), 50 states have return successors, (341), 48 states have call predecessors, (341), 50 states have call successors, (341) [2022-07-13 10:05:33,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 1460 transitions. [2022-07-13 10:05:33,279 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 1460 transitions. Word has length 48 [2022-07-13 10:05:33,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:05:33,279 INFO L495 AbstractCegarLoop]: Abstraction has 889 states and 1460 transitions. [2022-07-13 10:05:33,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 13 states have internal predecessors, (33), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-13 10:05:33,280 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 1460 transitions. [2022-07-13 10:05:33,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-13 10:05:33,283 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:05:33,283 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:05:33,300 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-07-13 10:05:33,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-13 10:05:33,497 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:05:33,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:05:33,498 INFO L85 PathProgramCache]: Analyzing trace with hash 485005286, now seen corresponding path program 3 times [2022-07-13 10:05:33,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:05:33,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241424227] [2022-07-13 10:05:33,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:05:33,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:05:33,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:05:33,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 10:05:33,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:05:33,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-13 10:05:33,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:05:33,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-13 10:05:33,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:05:33,578 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 32 proven. 59 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 10:05:33,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:05:33,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241424227] [2022-07-13 10:05:33,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241424227] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:05:33,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159484377] [2022-07-13 10:05:33,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 10:05:33,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:05:33,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:05:33,581 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:05:33,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-13 10:05:33,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-13 10:05:33,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:05:33,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-13 10:05:33,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:05:33,697 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 68 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-13 10:05:33,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:05:33,790 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 66 proven. 1 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-13 10:05:33,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159484377] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:05:33,790 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:05:33,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 9] total 18 [2022-07-13 10:05:33,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029430379] [2022-07-13 10:05:33,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:05:33,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 10:05:33,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:05:33,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 10:05:33,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2022-07-13 10:05:33,792 INFO L87 Difference]: Start difference. First operand 889 states and 1460 transitions. Second operand has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-13 10:05:34,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:05:34,000 INFO L93 Difference]: Finished difference Result 1163 states and 1857 transitions. [2022-07-13 10:05:34,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-13 10:05:34,001 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 51 [2022-07-13 10:05:34,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:05:34,003 INFO L225 Difference]: With dead ends: 1163 [2022-07-13 10:05:34,003 INFO L226 Difference]: Without dead ends: 378 [2022-07-13 10:05:34,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=199, Invalid=793, Unknown=0, NotChecked=0, Total=992 [2022-07-13 10:05:34,008 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 99 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 10:05:34,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 214 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 10:05:34,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2022-07-13 10:05:34,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 260. [2022-07-13 10:05:34,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 229 states have (on average 1.3537117903930131) internal successors, (310), 240 states have internal predecessors, (310), 16 states have call successors, (16), 4 states have call predecessors, (16), 14 states have return successors, (84), 15 states have call predecessors, (84), 16 states have call successors, (84) [2022-07-13 10:05:34,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 410 transitions. [2022-07-13 10:05:34,050 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 410 transitions. Word has length 51 [2022-07-13 10:05:34,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:05:34,050 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 410 transitions. [2022-07-13 10:05:34,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-13 10:05:34,050 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 410 transitions. [2022-07-13 10:05:34,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-13 10:05:34,052 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:05:34,052 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:05:34,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-13 10:05:34,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-13 10:05:34,264 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:05:34,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:05:34,264 INFO L85 PathProgramCache]: Analyzing trace with hash 820316862, now seen corresponding path program 4 times [2022-07-13 10:05:34,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:05:34,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050193704] [2022-07-13 10:05:34,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:05:34,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:05:34,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:05:34,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 10:05:34,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:05:34,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 10:05:34,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:05:34,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-13 10:05:34,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:05:34,547 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-07-13 10:05:34,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:05:34,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050193704] [2022-07-13 10:05:34,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050193704] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:05:34,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903567896] [2022-07-13 10:05:34,548 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 10:05:34,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:05:34,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:05:34,549 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:05:34,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-13 10:05:34,610 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 10:05:34,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:05:34,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-13 10:05:34,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:05:35,010 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-07-13 10:05:35,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:05:35,307 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-07-13 10:05:35,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903567896] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:05:35,307 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:05:35,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 19 [2022-07-13 10:05:35,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333512942] [2022-07-13 10:05:35,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:05:35,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-13 10:05:35,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:05:35,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-13 10:05:35,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2022-07-13 10:05:35,309 INFO L87 Difference]: Start difference. First operand 260 states and 410 transitions. Second operand has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 15 states have internal predecessors, (39), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-13 10:05:35,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:05:35,495 INFO L93 Difference]: Finished difference Result 376 states and 668 transitions. [2022-07-13 10:05:35,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-13 10:05:35,495 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 15 states have internal predecessors, (39), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 59 [2022-07-13 10:05:35,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:05:35,497 INFO L225 Difference]: With dead ends: 376 [2022-07-13 10:05:35,498 INFO L226 Difference]: Without dead ends: 372 [2022-07-13 10:05:35,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 109 SyntacticMatches, 16 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-07-13 10:05:35,499 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 38 mSDsluCounter, 639 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 702 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 10:05:35,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 702 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 10:05:35,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2022-07-13 10:05:35,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 300. [2022-07-13 10:05:35,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 265 states have (on average 1.369811320754717) internal successors, (363), 278 states have internal predecessors, (363), 18 states have call successors, (18), 4 states have call predecessors, (18), 16 states have return successors, (115), 17 states have call predecessors, (115), 18 states have call successors, (115) [2022-07-13 10:05:35,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 496 transitions. [2022-07-13 10:05:35,537 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 496 transitions. Word has length 59 [2022-07-13 10:05:35,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:05:35,538 INFO L495 AbstractCegarLoop]: Abstraction has 300 states and 496 transitions. [2022-07-13 10:05:35,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 15 states have internal predecessors, (39), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-13 10:05:35,538 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 496 transitions. [2022-07-13 10:05:35,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-13 10:05:35,540 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:05:35,540 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:05:35,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-13 10:05:35,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-13 10:05:35,753 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:05:35,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:05:35,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1500375232, now seen corresponding path program 7 times [2022-07-13 10:05:35,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:05:35,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061159437] [2022-07-13 10:05:35,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:05:35,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:05:35,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:05:35,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 10:05:35,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:05:36,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 10:05:36,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:05:36,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-13 10:05:36,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:05:36,102 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 37 proven. 94 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-13 10:05:36,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:05:36,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061159437] [2022-07-13 10:05:36,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061159437] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:05:36,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134752497] [2022-07-13 10:05:36,102 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 10:05:36,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:05:36,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:05:36,104 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:05:36,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-13 10:05:36,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:05:36,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-13 10:05:36,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:05:36,431 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 11 [2022-07-13 10:05:36,459 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-13 10:05:36,742 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 14 proven. 129 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-13 10:05:36,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:05:36,963 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 19 treesize of output 17 [2022-07-13 10:05:36,965 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 38 treesize of output 34 [2022-07-13 10:05:37,069 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 10 treesize of output 6 [2022-07-13 10:05:37,210 INFO L356 Elim1Store]: treesize reduction 4, result has 73.3 percent of original size [2022-07-13 10:05:37,211 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-07-13 10:05:37,351 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 7 proven. 133 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-13 10:05:37,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134752497] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:05:37,353 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:05:37,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22, 19] total 47 [2022-07-13 10:05:37,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379902120] [2022-07-13 10:05:37,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:05:37,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-13 10:05:37,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:05:37,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-13 10:05:37,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1954, Unknown=0, NotChecked=0, Total=2162 [2022-07-13 10:05:37,355 INFO L87 Difference]: Start difference. First operand 300 states and 496 transitions. Second operand has 47 states, 43 states have (on average 2.488372093023256) internal successors, (107), 44 states have internal predecessors, (107), 8 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (9), 6 states have call predecessors, (9), 8 states have call successors, (9) [2022-07-13 10:05:41,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:05:41,874 INFO L93 Difference]: Finished difference Result 1230 states and 2018 transitions. [2022-07-13 10:05:41,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-07-13 10:05:41,880 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 43 states have (on average 2.488372093023256) internal successors, (107), 44 states have internal predecessors, (107), 8 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (9), 6 states have call predecessors, (9), 8 states have call successors, (9) Word has length 59 [2022-07-13 10:05:41,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:05:41,884 INFO L225 Difference]: With dead ends: 1230 [2022-07-13 10:05:41,885 INFO L226 Difference]: Without dead ends: 996 [2022-07-13 10:05:41,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 115 SyntacticMatches, 6 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7169 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=2262, Invalid=18908, Unknown=0, NotChecked=0, Total=21170 [2022-07-13 10:05:41,888 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 362 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 1612 mSolverCounterSat, 292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 2351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 1612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 447 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-13 10:05:41,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [379 Valid, 613 Invalid, 2351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [292 Valid, 1612 Invalid, 0 Unknown, 447 Unchecked, 1.1s Time] [2022-07-13 10:05:41,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 996 states. [2022-07-13 10:05:41,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 996 to 652. [2022-07-13 10:05:41,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 652 states, 585 states have (on average 1.3846153846153846) internal successors, (810), 613 states have internal predecessors, (810), 28 states have call successors, (28), 11 states have call predecessors, (28), 38 states have return successors, (262), 27 states have call predecessors, (262), 28 states have call successors, (262) [2022-07-13 10:05:41,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 1100 transitions. [2022-07-13 10:05:41,971 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 1100 transitions. Word has length 59 [2022-07-13 10:05:41,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:05:41,971 INFO L495 AbstractCegarLoop]: Abstraction has 652 states and 1100 transitions. [2022-07-13 10:05:41,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 43 states have (on average 2.488372093023256) internal successors, (107), 44 states have internal predecessors, (107), 8 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (9), 6 states have call predecessors, (9), 8 states have call successors, (9) [2022-07-13 10:05:41,972 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 1100 transitions. [2022-07-13 10:05:41,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-13 10:05:41,974 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:05:41,974 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:05:41,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-13 10:05:42,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:05:42,187 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:05:42,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:05:42,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1078482300, now seen corresponding path program 8 times [2022-07-13 10:05:42,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:05:42,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731679468] [2022-07-13 10:05:42,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:05:42,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:05:42,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:05:42,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 10:05:42,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:05:42,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 10:05:42,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:05:42,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-13 10:05:42,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:05:42,644 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 49 proven. 90 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-13 10:05:42,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:05:42,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731679468] [2022-07-13 10:05:42,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731679468] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:05:42,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615585920] [2022-07-13 10:05:42,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 10:05:42,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:05:42,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:05:42,646 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:05:42,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-13 10:05:42,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 10:05:42,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:05:42,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-13 10:05:42,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:05:43,129 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-13 10:05:43,130 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 26 [2022-07-13 10:05:43,173 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-13 10:05:43,173 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 31 treesize of output 24 [2022-07-13 10:05:43,234 INFO L356 Elim1Store]: treesize reduction 86, result has 9.5 percent of original size [2022-07-13 10:05:43,234 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 30 [2022-07-13 10:05:48,958 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 21 proven. 132 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 10:05:48,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:05:51,420 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 46 treesize of output 40 [2022-07-13 10:05:51,423 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 48 treesize of output 40 [2022-07-13 10:05:51,565 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 10:05:51,565 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 50 [2022-07-13 10:05:51,574 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 12 treesize of output 6 [2022-07-13 10:05:51,587 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 10:05:51,589 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 58 [2022-07-13 10:05:51,940 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 8 proven. 141 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 10:05:51,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615585920] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:05:51,940 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:05:51,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24, 23] total 62 [2022-07-13 10:05:51,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60994237] [2022-07-13 10:05:51,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:05:51,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-07-13 10:05:51,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:05:51,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-07-13 10:05:51,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=3395, Unknown=5, NotChecked=0, Total=3782 [2022-07-13 10:05:51,942 INFO L87 Difference]: Start difference. First operand 652 states and 1100 transitions. Second operand has 62 states, 59 states have (on average 2.305084745762712) internal successors, (136), 59 states have internal predecessors, (136), 7 states have call successors, (8), 3 states have call predecessors, (8), 8 states have return successors, (9), 6 states have call predecessors, (9), 7 states have call successors, (9)