./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/reducercommutativity/max20-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/reducercommutativity/max20-1.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 da9ac0c3f4abc9a6d9e8b4bf1276cf60fb65e65c55d9f94968d51682bf71ef87 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 09:37:24,176 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 09:37:24,178 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 09:37:24,212 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 09:37:24,213 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 09:37:24,214 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 09:37:24,215 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 09:37:24,216 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 09:37:24,218 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 09:37:24,221 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 09:37:24,221 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 09:37:24,223 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 09:37:24,223 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 09:37:24,224 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 09:37:24,225 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 09:37:24,227 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 09:37:24,228 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 09:37:24,229 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 09:37:24,230 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 09:37:24,234 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 09:37:24,235 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 09:37:24,236 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 09:37:24,236 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 09:37:24,237 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 09:37:24,238 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 09:37:24,243 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 09:37:24,243 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 09:37:24,243 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 09:37:24,244 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 09:37:24,244 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 09:37:24,245 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 09:37:24,245 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 09:37:24,246 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 09:37:24,247 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 09:37:24,248 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 09:37:24,248 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 09:37:24,249 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 09:37:24,249 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 09:37:24,250 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 09:37:24,250 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 09:37:24,250 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 09:37:24,251 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 09:37:24,252 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 09:37:24,274 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 09:37:24,274 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 09:37:24,275 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 09:37:24,275 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 09:37:24,275 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 09:37:24,275 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 09:37:24,276 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 09:37:24,276 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 09:37:24,276 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 09:37:24,277 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 09:37:24,277 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 09:37:24,277 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 09:37:24,278 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 09:37:24,278 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 09:37:24,278 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 09:37:24,278 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 09:37:24,278 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 09:37:24,279 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 09:37:24,279 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 09:37:24,280 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 09:37:24,280 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 09:37:24,280 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 09:37:24,280 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 09:37:24,281 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 09:37:24,281 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 09:37:24,281 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 09:37:24,281 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 09:37:24,281 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 09:37:24,281 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 09:37:24,281 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 09:37:24,282 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 09:37:24,282 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 09:37:24,282 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 09:37:24,282 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> da9ac0c3f4abc9a6d9e8b4bf1276cf60fb65e65c55d9f94968d51682bf71ef87 [2022-07-22 09:37:24,440 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 09:37:24,455 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 09:37:24,457 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 09:37:24,458 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 09:37:24,459 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 09:37:24,460 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/max20-1.i [2022-07-22 09:37:24,515 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74299ac84/9358d9114a0544fba86c8a05371965a3/FLAG8a9b99daf [2022-07-22 09:37:24,854 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 09:37:24,854 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/max20-1.i [2022-07-22 09:37:24,858 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74299ac84/9358d9114a0544fba86c8a05371965a3/FLAG8a9b99daf [2022-07-22 09:37:25,302 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74299ac84/9358d9114a0544fba86c8a05371965a3 [2022-07-22 09:37:25,304 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 09:37:25,305 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 09:37:25,308 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 09:37:25,308 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 09:37:25,310 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 09:37:25,311 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:37:25" (1/1) ... [2022-07-22 09:37:25,311 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a5ca393 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:37:25, skipping insertion in model container [2022-07-22 09:37:25,312 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:37:25" (1/1) ... [2022-07-22 09:37:25,316 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 09:37:25,328 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 09:37:25,430 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/max20-1.i[1290,1303] [2022-07-22 09:37:25,437 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 09:37:25,441 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 09:37:25,453 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/max20-1.i[1290,1303] [2022-07-22 09:37:25,456 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 09:37:25,465 INFO L208 MainTranslator]: Completed translation [2022-07-22 09:37:25,466 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:37:25 WrapperNode [2022-07-22 09:37:25,466 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 09:37:25,467 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 09:37:25,467 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 09:37:25,467 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 09:37:25,472 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:37:25" (1/1) ... [2022-07-22 09:37:25,476 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:37:25" (1/1) ... [2022-07-22 09:37:25,490 INFO L137 Inliner]: procedures = 16, calls = 23, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2022-07-22 09:37:25,490 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 09:37:25,491 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 09:37:25,491 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 09:37:25,491 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 09:37:25,497 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:37:25" (1/1) ... [2022-07-22 09:37:25,497 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:37:25" (1/1) ... [2022-07-22 09:37:25,504 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:37:25" (1/1) ... [2022-07-22 09:37:25,504 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:37:25" (1/1) ... [2022-07-22 09:37:25,508 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:37:25" (1/1) ... [2022-07-22 09:37:25,513 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:37:25" (1/1) ... [2022-07-22 09:37:25,514 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:37:25" (1/1) ... [2022-07-22 09:37:25,515 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 09:37:25,526 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 09:37:25,526 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 09:37:25,526 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 09:37:25,527 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:37:25" (1/1) ... [2022-07-22 09:37:25,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 09:37:25,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:37:25,548 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-22 09:37:25,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-22 09:37:25,571 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 09:37:25,571 INFO L130 BoogieDeclarations]: Found specification of procedure max [2022-07-22 09:37:25,571 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2022-07-22 09:37:25,571 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 09:37:25,571 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 09:37:25,571 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 09:37:25,572 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 09:37:25,572 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 09:37:25,572 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 09:37:25,572 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 09:37:25,616 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 09:37:25,617 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 09:37:25,716 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 09:37:25,720 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 09:37:25,720 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-22 09:37:25,722 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:37:25 BoogieIcfgContainer [2022-07-22 09:37:25,722 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 09:37:25,723 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 09:37:25,723 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 09:37:25,725 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 09:37:25,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:37:25" (1/3) ... [2022-07-22 09:37:25,726 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29c36553 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:37:25, skipping insertion in model container [2022-07-22 09:37:25,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:37:25" (2/3) ... [2022-07-22 09:37:25,726 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29c36553 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:37:25, skipping insertion in model container [2022-07-22 09:37:25,727 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:37:25" (3/3) ... [2022-07-22 09:37:25,727 INFO L111 eAbstractionObserver]: Analyzing ICFG max20-1.i [2022-07-22 09:37:25,736 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 09:37:25,737 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 09:37:25,765 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 09:37:25,770 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@506d2b83, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@332fb7df [2022-07-22 09:37:25,770 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 09:37:25,773 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 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) [2022-07-22 09:37:25,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-22 09:37:25,778 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:37:25,779 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] [2022-07-22 09:37:25,779 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:37:25,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:37:25,783 INFO L85 PathProgramCache]: Analyzing trace with hash -528134526, now seen corresponding path program 1 times [2022-07-22 09:37:25,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:37:25,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149082157] [2022-07-22 09:37:25,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:37:25,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:37:25,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:37:25,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 09:37:25,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:37:25,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 09:37:25,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:37:25,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-22 09:37:25,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:37:25,922 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 09:37:25,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:37:25,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149082157] [2022-07-22 09:37:25,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149082157] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 09:37:25,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 09:37:25,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 09:37:25,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088128712] [2022-07-22 09:37:25,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 09:37:25,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 09:37:25,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:37:25,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 09:37:25,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 09:37:25,950 INFO L87 Difference]: Start difference. First operand has 28 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 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 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 09:37:25,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:37:25,969 INFO L93 Difference]: Finished difference Result 52 states and 71 transitions. [2022-07-22 09:37:25,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 09:37:25,972 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2022-07-22 09:37:25,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:37:25,977 INFO L225 Difference]: With dead ends: 52 [2022-07-22 09:37:25,978 INFO L226 Difference]: Without dead ends: 24 [2022-07-22 09:37:25,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 09:37:25,990 INFO L413 NwaCegarLoop]: 33 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, 33 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 [2022-07-22 09:37:25,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:37:26,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-07-22 09:37:26,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-07-22 09:37:26,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 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) [2022-07-22 09:37:26,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2022-07-22 09:37:26,033 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 28 [2022-07-22 09:37:26,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:37:26,033 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2022-07-22 09:37:26,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 09:37:26,043 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2022-07-22 09:37:26,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-22 09:37:26,046 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:37:26,046 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] [2022-07-22 09:37:26,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 09:37:26,047 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:37:26,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:37:26,051 INFO L85 PathProgramCache]: Analyzing trace with hash -321958693, now seen corresponding path program 1 times [2022-07-22 09:37:26,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:37:26,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189509635] [2022-07-22 09:37:26,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:37:26,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:37:26,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:37:26,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 09:37:26,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:37:26,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 09:37:26,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:37:26,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-22 09:37:26,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:37:26,166 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-22 09:37:26,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:37:26,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189509635] [2022-07-22 09:37:26,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189509635] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:37:26,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246784152] [2022-07-22 09:37:26,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:37:26,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:37:26,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:37:26,175 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:37:26,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 09:37:26,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:37:26,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 09:37:26,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:37:26,339 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 09:37:26,339 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 09:37:26,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246784152] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 09:37:26,343 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 09:37:26,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-07-22 09:37:26,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034606432] [2022-07-22 09:37:26,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 09:37:26,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 09:37:26,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:37:26,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 09:37:26,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 09:37:26,349 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 09:37:26,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:37:26,363 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2022-07-22 09:37:26,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 09:37:26,364 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2022-07-22 09:37:26,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:37:26,365 INFO L225 Difference]: With dead ends: 46 [2022-07-22 09:37:26,365 INFO L226 Difference]: Without dead ends: 26 [2022-07-22 09:37:26,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 09:37:26,366 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 1 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:37:26,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 52 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:37:26,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-07-22 09:37:26,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-07-22 09:37:26,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 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) [2022-07-22 09:37:26,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2022-07-22 09:37:26,371 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 28 [2022-07-22 09:37:26,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:37:26,371 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2022-07-22 09:37:26,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 09:37:26,371 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2022-07-22 09:37:26,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-22 09:37:26,372 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:37:26,372 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, 1, 1] [2022-07-22 09:37:26,390 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-22 09:37:26,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:37:26,594 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:37:26,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:37:26,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1777476163, now seen corresponding path program 1 times [2022-07-22 09:37:26,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:37:26,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199304841] [2022-07-22 09:37:26,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:37:26,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:37:26,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:37:26,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-22 09:37:26,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:37:26,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 09:37:26,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:37:26,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-22 09:37:26,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:37:26,684 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 09:37:26,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:37:26,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199304841] [2022-07-22 09:37:26,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199304841] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:37:26,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936665797] [2022-07-22 09:37:26,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:37:26,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:37:26,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:37:26,686 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:37:26,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 09:37:26,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:37:26,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 09:37:26,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:37:26,742 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-22 09:37:26,742 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 09:37:26,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936665797] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 09:37:26,742 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 09:37:26,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-07-22 09:37:26,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987200050] [2022-07-22 09:37:26,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 09:37:26,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 09:37:26,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:37:26,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 09:37:26,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 09:37:26,744 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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) [2022-07-22 09:37:26,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:37:26,754 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2022-07-22 09:37:26,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 09:37:26,754 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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 30 [2022-07-22 09:37:26,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:37:26,755 INFO L225 Difference]: With dead ends: 48 [2022-07-22 09:37:26,755 INFO L226 Difference]: Without dead ends: 29 [2022-07-22 09:37:26,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 09:37:26,756 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 4 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:37:26,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 50 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:37:26,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-07-22 09:37:26,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2022-07-22 09:37:26,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 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) [2022-07-22 09:37:26,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2022-07-22 09:37:26,760 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 30 [2022-07-22 09:37:26,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:37:26,760 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2022-07-22 09:37:26,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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) [2022-07-22 09:37:26,761 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2022-07-22 09:37:26,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-22 09:37:26,762 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:37:26,762 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-07-22 09:37:26,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 09:37:26,978 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,SelfDestructingSolverStorable2 [2022-07-22 09:37:26,978 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:37:26,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:37:26,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1540631384, now seen corresponding path program 1 times [2022-07-22 09:37:26,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:37:26,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075860302] [2022-07-22 09:37:26,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:37:26,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:37:26,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:37:27,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-22 09:37:27,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:37:27,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 09:37:27,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:37:27,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-22 09:37:27,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:37:27,049 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 09:37:27,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:37:27,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075860302] [2022-07-22 09:37:27,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075860302] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:37:27,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659258621] [2022-07-22 09:37:27,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:37:27,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:37:27,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:37:27,067 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:37:27,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 09:37:27,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:37:27,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 09:37:27,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:37:27,138 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 09:37:27,139 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 09:37:27,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659258621] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 09:37:27,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 09:37:27,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-07-22 09:37:27,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167419494] [2022-07-22 09:37:27,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 09:37:27,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 09:37:27,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:37:27,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 09:37:27,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-22 09:37:27,141 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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) [2022-07-22 09:37:27,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:37:27,150 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2022-07-22 09:37:27,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 09:37:27,150 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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 42 [2022-07-22 09:37:27,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:37:27,151 INFO L225 Difference]: With dead ends: 43 [2022-07-22 09:37:27,151 INFO L226 Difference]: Without dead ends: 28 [2022-07-22 09:37:27,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-22 09:37:27,152 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 1 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:37:27,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 51 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:37:27,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-07-22 09:37:27,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-07-22 09:37:27,156 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) [2022-07-22 09:37:27,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2022-07-22 09:37:27,157 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 42 [2022-07-22 09:37:27,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:37:27,158 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2022-07-22 09:37:27,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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) [2022-07-22 09:37:27,159 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2022-07-22 09:37:27,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-22 09:37:27,159 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:37:27,160 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 1, 1] [2022-07-22 09:37:27,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 09:37:27,360 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 [2022-07-22 09:37:27,360 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:37:27,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:37:27,361 INFO L85 PathProgramCache]: Analyzing trace with hash -180199466, now seen corresponding path program 1 times [2022-07-22 09:37:27,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:37:27,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092218361] [2022-07-22 09:37:27,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:37:27,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:37:27,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:37:27,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-22 09:37:27,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:37:27,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 09:37:27,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:37:27,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-22 09:37:27,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:37:27,421 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-22 09:37:27,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:37:27,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092218361] [2022-07-22 09:37:27,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092218361] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:37:27,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742521818] [2022-07-22 09:37:27,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:37:27,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:37:27,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:37:27,422 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:37:27,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 09:37:27,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:37:27,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 09:37:27,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:37:27,532 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-07-22 09:37:27,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:37:27,562 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-07-22 09:37:27,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742521818] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:37:27,562 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:37:27,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2022-07-22 09:37:27,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954911190] [2022-07-22 09:37:27,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:37:27,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 09:37:27,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:37:27,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 09:37:27,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-22 09:37:27,564 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-22 09:37:27,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:37:27,591 INFO L93 Difference]: Finished difference Result 62 states and 80 transitions. [2022-07-22 09:37:27,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 09:37:27,592 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 44 [2022-07-22 09:37:27,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:37:27,592 INFO L225 Difference]: With dead ends: 62 [2022-07-22 09:37:27,592 INFO L226 Difference]: Without dead ends: 40 [2022-07-22 09:37:27,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-22 09:37:27,593 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 15 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:37:27,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 70 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:37:27,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-07-22 09:37:27,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2022-07-22 09:37:27,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.15625) internal successors, (37), 32 states have internal predecessors, (37), 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) [2022-07-22 09:37:27,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2022-07-22 09:37:27,598 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 44 [2022-07-22 09:37:27,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:37:27,598 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2022-07-22 09:37:27,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-22 09:37:27,598 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2022-07-22 09:37:27,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-22 09:37:27,599 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:37:27,599 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:37:27,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 09:37:27,816 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 [2022-07-22 09:37:27,817 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:37:27,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:37:27,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1875433, now seen corresponding path program 2 times [2022-07-22 09:37:27,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:37:27,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154106326] [2022-07-22 09:37:27,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:37:27,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:37:27,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:37:27,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-22 09:37:27,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:37:27,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-22 09:37:27,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:37:27,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-22 09:37:27,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:37:27,884 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-07-22 09:37:27,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:37:27,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154106326] [2022-07-22 09:37:27,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154106326] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:37:27,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087683974] [2022-07-22 09:37:27,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 09:37:27,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:37:27,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:37:27,886 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) [2022-07-22 09:37:27,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 09:37:27,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 09:37:27,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:37:27,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 09:37:27,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:37:27,987 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-07-22 09:37:27,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:37:28,048 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-07-22 09:37:28,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087683974] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:37:28,048 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:37:28,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2022-07-22 09:37:28,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547447199] [2022-07-22 09:37:28,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:37:28,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 09:37:28,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:37:28,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 09:37:28,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-07-22 09:37:28,050 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-22 09:37:28,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:37:28,090 INFO L93 Difference]: Finished difference Result 78 states and 96 transitions. [2022-07-22 09:37:28,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 09:37:28,091 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 62 [2022-07-22 09:37:28,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:37:28,092 INFO L225 Difference]: With dead ends: 78 [2022-07-22 09:37:28,092 INFO L226 Difference]: Without dead ends: 52 [2022-07-22 09:37:28,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-07-22 09:37:28,094 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 17 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:37:28,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 93 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:37:28,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-07-22 09:37:28,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2022-07-22 09:37:28,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.108695652173913) internal successors, (51), 46 states have internal predecessors, (51), 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) [2022-07-22 09:37:28,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2022-07-22 09:37:28,099 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 62 [2022-07-22 09:37:28,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:37:28,100 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2022-07-22 09:37:28,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-22 09:37:28,100 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2022-07-22 09:37:28,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-22 09:37:28,101 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:37:28,102 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 6, 6, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:37:28,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 09:37:28,327 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 [2022-07-22 09:37:28,327 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:37:28,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:37:28,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1341943393, now seen corresponding path program 3 times [2022-07-22 09:37:28,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:37:28,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046198702] [2022-07-22 09:37:28,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:37:28,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:37:28,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:37:28,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 09:37:28,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:37:28,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-22 09:37:28,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:37:28,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-22 09:37:28,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:37:28,501 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-07-22 09:37:28,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:37:28,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046198702] [2022-07-22 09:37:28,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046198702] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:37:28,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793965970] [2022-07-22 09:37:28,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 09:37:28,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:37:28,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:37:28,504 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) [2022-07-22 09:37:28,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 09:37:28,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-22 09:37:28,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:37:28,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 09:37:28,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:37:28,612 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 48 proven. 6 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2022-07-22 09:37:28,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:37:28,664 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 48 proven. 6 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2022-07-22 09:37:28,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793965970] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:37:28,664 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:37:28,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2022-07-22 09:37:28,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146009198] [2022-07-22 09:37:28,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:37:28,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-22 09:37:28,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:37:28,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-22 09:37:28,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-07-22 09:37:28,667 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-22 09:37:28,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:37:28,748 INFO L93 Difference]: Finished difference Result 98 states and 121 transitions. [2022-07-22 09:37:28,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-22 09:37:28,749 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 76 [2022-07-22 09:37:28,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:37:28,753 INFO L225 Difference]: With dead ends: 98 [2022-07-22 09:37:28,753 INFO L226 Difference]: Without dead ends: 70 [2022-07-22 09:37:28,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-07-22 09:37:28,757 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 39 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:37:28,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 160 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 09:37:28,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-07-22 09:37:28,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2022-07-22 09:37:28,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.140625) internal successors, (73), 64 states have internal predecessors, (73), 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) [2022-07-22 09:37:28,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 79 transitions. [2022-07-22 09:37:28,774 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 79 transitions. Word has length 76 [2022-07-22 09:37:28,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:37:28,776 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 79 transitions. [2022-07-22 09:37:28,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-22 09:37:28,778 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 79 transitions. [2022-07-22 09:37:28,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-07-22 09:37:28,781 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:37:28,782 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 11, 11, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:37:28,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-22 09:37:28,982 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 [2022-07-22 09:37:28,983 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:37:28,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:37:28,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1821282991, now seen corresponding path program 4 times [2022-07-22 09:37:28,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:37:28,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388238788] [2022-07-22 09:37:28,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:37:28,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:37:29,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:37:29,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-22 09:37:29,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:37:29,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-07-22 09:37:29,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:37:29,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-07-22 09:37:29,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:37:29,188 INFO L134 CoverageAnalysis]: Checked inductivity of 806 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2022-07-22 09:37:29,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:37:29,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388238788] [2022-07-22 09:37:29,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388238788] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:37:29,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666733686] [2022-07-22 09:37:29,188 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 09:37:29,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:37:29,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:37:29,190 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) [2022-07-22 09:37:29,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 09:37:29,293 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 09:37:29,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:37:29,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-22 09:37:29,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:37:29,352 INFO L134 CoverageAnalysis]: Checked inductivity of 806 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2022-07-22 09:37:29,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:37:29,503 INFO L134 CoverageAnalysis]: Checked inductivity of 806 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2022-07-22 09:37:29,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666733686] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:37:29,503 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:37:29,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 23 [2022-07-22 09:37:29,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295339073] [2022-07-22 09:37:29,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:37:29,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-22 09:37:29,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:37:29,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-22 09:37:29,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2022-07-22 09:37:29,505 INFO L87 Difference]: Start difference. First operand 69 states and 79 transitions. Second operand has 23 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 23 states have internal predecessors, (71), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-22 09:37:29,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:37:29,555 INFO L93 Difference]: Finished difference Result 131 states and 159 transitions. [2022-07-22 09:37:29,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-22 09:37:29,555 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 23 states have internal predecessors, (71), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 126 [2022-07-22 09:37:29,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:37:29,556 INFO L225 Difference]: With dead ends: 131 [2022-07-22 09:37:29,556 INFO L226 Difference]: Without dead ends: 87 [2022-07-22 09:37:29,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 248 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2022-07-22 09:37:29,557 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 20 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:37:29,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 77 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:37:29,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-07-22 09:37:29,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2022-07-22 09:37:29,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.1097560975609757) internal successors, (91), 82 states have internal predecessors, (91), 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) [2022-07-22 09:37:29,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 97 transitions. [2022-07-22 09:37:29,562 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 97 transitions. Word has length 126 [2022-07-22 09:37:29,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:37:29,562 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 97 transitions. [2022-07-22 09:37:29,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 23 states have internal predecessors, (71), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-22 09:37:29,563 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 97 transitions. [2022-07-22 09:37:29,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-07-22 09:37:29,564 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:37:29,564 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 18, 18, 18, 18, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:37:29,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-22 09:37:29,779 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 [2022-07-22 09:37:29,780 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:37:29,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:37:29,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1526385697, now seen corresponding path program 5 times [2022-07-22 09:37:29,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:37:29,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862666638] [2022-07-22 09:37:29,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:37:29,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:37:29,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:37:29,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-22 09:37:29,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:37:29,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-07-22 09:37:29,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:37:29,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-22 09:37:29,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:37:29,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1085 backedges. 0 proven. 386 refuted. 0 times theorem prover too weak. 699 trivial. 0 not checked. [2022-07-22 09:37:29,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:37:29,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862666638] [2022-07-22 09:37:29,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862666638] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:37:29,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383775782] [2022-07-22 09:37:29,890 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 09:37:29,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:37:29,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:37:29,904 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) [2022-07-22 09:37:29,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-22 09:37:30,939 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2022-07-22 09:37:30,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:37:30,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 09:37:30,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:37:30,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1085 backedges. 316 proven. 66 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2022-07-22 09:37:30,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:37:31,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1085 backedges. 0 proven. 386 refuted. 0 times theorem prover too weak. 699 trivial. 0 not checked. [2022-07-22 09:37:31,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383775782] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:37:31,082 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:37:31,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-07-22 09:37:31,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351410122] [2022-07-22 09:37:31,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:37:31,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-22 09:37:31,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:37:31,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-22 09:37:31,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2022-07-22 09:37:31,084 INFO L87 Difference]: Start difference. First operand 87 states and 97 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 09:37:31,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:37:31,135 INFO L93 Difference]: Finished difference Result 162 states and 199 transitions. [2022-07-22 09:37:31,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-22 09:37:31,136 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 144 [2022-07-22 09:37:31,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:37:31,137 INFO L225 Difference]: With dead ends: 162 [2022-07-22 09:37:31,137 INFO L226 Difference]: Without dead ends: 119 [2022-07-22 09:37:31,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 287 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2022-07-22 09:37:31,138 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 76 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:37:31,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 140 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:37:31,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-07-22 09:37:31,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2022-07-22 09:37:31,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 114 states have (on average 1.1491228070175439) internal successors, (131), 114 states have internal predecessors, (131), 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) [2022-07-22 09:37:31,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 137 transitions. [2022-07-22 09:37:31,176 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 137 transitions. Word has length 144 [2022-07-22 09:37:31,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:37:31,176 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 137 transitions. [2022-07-22 09:37:31,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 09:37:31,177 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 137 transitions. [2022-07-22 09:37:31,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2022-07-22 09:37:31,178 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:37:31,178 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 42, 20, 20, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:37:31,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-22 09:37:31,395 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 [2022-07-22 09:37:31,396 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:37:31,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:37:31,396 INFO L85 PathProgramCache]: Analyzing trace with hash -577234183, now seen corresponding path program 6 times [2022-07-22 09:37:31,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:37:31,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435133848] [2022-07-22 09:37:31,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:37:31,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:37:31,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:37:31,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-22 09:37:31,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:37:31,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-07-22 09:37:31,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:37:31,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2022-07-22 09:37:31,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:37:31,612 INFO L134 CoverageAnalysis]: Checked inductivity of 3989 backedges. 0 proven. 2010 refuted. 0 times theorem prover too weak. 1979 trivial. 0 not checked. [2022-07-22 09:37:31,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:37:31,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435133848] [2022-07-22 09:37:31,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435133848] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:37:31,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840388420] [2022-07-22 09:37:31,613 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 09:37:31,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:37:31,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:37:31,636 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) [2022-07-22 09:37:31,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-22 09:37:31,771 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-07-22 09:37:31,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:37:31,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 09:37:31,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:37:31,807 INFO L134 CoverageAnalysis]: Checked inductivity of 3989 backedges. 1634 proven. 4 refuted. 0 times theorem prover too weak. 2351 trivial. 0 not checked. [2022-07-22 09:37:31,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:37:31,858 INFO L134 CoverageAnalysis]: Checked inductivity of 3989 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3985 trivial. 0 not checked. [2022-07-22 09:37:31,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840388420] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:37:31,859 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:37:31,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 5, 5] total 23 [2022-07-22 09:37:31,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466322260] [2022-07-22 09:37:31,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:37:31,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-22 09:37:31,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:37:31,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-22 09:37:31,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2022-07-22 09:37:31,861 INFO L87 Difference]: Start difference. First operand 119 states and 137 transitions. Second operand has 23 states, 23 states have (on average 4.391304347826087) internal successors, (101), 23 states have internal predecessors, (101), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-22 09:37:31,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:37:31,958 INFO L93 Difference]: Finished difference Result 209 states and 253 transitions. [2022-07-22 09:37:31,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-22 09:37:31,958 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.391304347826087) internal successors, (101), 23 states have internal predecessors, (101), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 240 [2022-07-22 09:37:31,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:37:31,961 INFO L225 Difference]: With dead ends: 209 [2022-07-22 09:37:31,961 INFO L226 Difference]: Without dead ends: 134 [2022-07-22 09:37:31,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 480 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2022-07-22 09:37:31,963 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 96 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:37:31,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 115 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 09:37:31,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-07-22 09:37:31,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 131. [2022-07-22 09:37:31,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.1428571428571428) internal successors, (144), 126 states have internal predecessors, (144), 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) [2022-07-22 09:37:31,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 150 transitions. [2022-07-22 09:37:31,974 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 150 transitions. Word has length 240 [2022-07-22 09:37:31,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:37:31,975 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 150 transitions. [2022-07-22 09:37:31,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.391304347826087) internal successors, (101), 23 states have internal predecessors, (101), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-22 09:37:31,975 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 150 transitions. [2022-07-22 09:37:31,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2022-07-22 09:37:31,977 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:37:31,978 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 45, 20, 20, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:37:32,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-22 09:37:32,195 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 [2022-07-22 09:37:32,196 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:37:32,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:37:32,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1044531828, now seen corresponding path program 7 times [2022-07-22 09:37:32,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:37:32,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041628746] [2022-07-22 09:37:32,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:37:32,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:37:32,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:37:32,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-22 09:37:32,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:37:32,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-07-22 09:37:32,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:37:32,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2022-07-22 09:37:32,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:37:32,425 INFO L134 CoverageAnalysis]: Checked inductivity of 4546 backedges. 0 proven. 2303 refuted. 0 times theorem prover too weak. 2243 trivial. 0 not checked. [2022-07-22 09:37:32,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:37:32,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041628746] [2022-07-22 09:37:32,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041628746] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:37:32,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133810187] [2022-07-22 09:37:32,426 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 09:37:32,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:37:32,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:37:32,438 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) [2022-07-22 09:37:32,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-22 09:37:32,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:37:32,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 889 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-22 09:37:32,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:37:32,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4546 backedges. 1864 proven. 435 refuted. 0 times theorem prover too weak. 2247 trivial. 0 not checked. [2022-07-22 09:37:32,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:37:32,817 INFO L134 CoverageAnalysis]: Checked inductivity of 4546 backedges. 0 proven. 2303 refuted. 0 times theorem prover too weak. 2243 trivial. 0 not checked. [2022-07-22 09:37:32,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133810187] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:37:32,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:37:32,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 22 [2022-07-22 09:37:32,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423637361] [2022-07-22 09:37:32,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:37:32,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-22 09:37:32,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:37:32,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-22 09:37:32,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2022-07-22 09:37:32,820 INFO L87 Difference]: Start difference. First operand 131 states and 150 transitions. Second operand has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 09:37:32,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:37:32,870 INFO L93 Difference]: Finished difference Result 238 states and 287 transitions. [2022-07-22 09:37:32,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-22 09:37:32,871 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 260 [2022-07-22 09:37:32,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:37:32,872 INFO L225 Difference]: With dead ends: 238 [2022-07-22 09:37:32,872 INFO L226 Difference]: Without dead ends: 151 [2022-07-22 09:37:32,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 542 GetRequests, 521 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2022-07-22 09:37:32,873 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 105 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:37:32,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 196 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:37:32,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-07-22 09:37:32,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2022-07-22 09:37:32,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 146 states have (on average 1.1575342465753424) internal successors, (169), 146 states have internal predecessors, (169), 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) [2022-07-22 09:37:32,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 175 transitions. [2022-07-22 09:37:32,893 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 175 transitions. Word has length 260 [2022-07-22 09:37:32,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:37:32,893 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 175 transitions. [2022-07-22 09:37:32,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 09:37:32,894 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 175 transitions. [2022-07-22 09:37:32,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2022-07-22 09:37:32,896 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:37:32,896 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 60, 20, 20, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:37:32,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-22 09:37:33,103 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 [2022-07-22 09:37:33,104 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:37:33,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:37:33,104 INFO L85 PathProgramCache]: Analyzing trace with hash 259706899, now seen corresponding path program 8 times [2022-07-22 09:37:33,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:37:33,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176979625] [2022-07-22 09:37:33,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:37:33,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:37:33,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:37:33,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-22 09:37:33,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:37:33,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-07-22 09:37:33,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:37:33,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 231 [2022-07-22 09:37:33,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:37:33,323 INFO L134 CoverageAnalysis]: Checked inductivity of 7711 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 7675 trivial. 0 not checked. [2022-07-22 09:37:33,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:37:33,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176979625] [2022-07-22 09:37:33,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176979625] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:37:33,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072203191] [2022-07-22 09:37:33,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 09:37:33,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:37:33,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:37:33,325 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) [2022-07-22 09:37:33,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-22 09:37:33,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 09:37:33,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:37:33,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 1069 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 09:37:33,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:37:33,564 INFO L134 CoverageAnalysis]: Checked inductivity of 7711 backedges. 3290 proven. 36 refuted. 0 times theorem prover too weak. 4385 trivial. 0 not checked. [2022-07-22 09:37:33,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:37:33,648 INFO L134 CoverageAnalysis]: Checked inductivity of 7711 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 7675 trivial. 0 not checked. [2022-07-22 09:37:33,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072203191] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:37:33,649 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:37:33,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-07-22 09:37:33,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468888097] [2022-07-22 09:37:33,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:37:33,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-22 09:37:33,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:37:33,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-22 09:37:33,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-07-22 09:37:33,650 INFO L87 Difference]: Start difference. First operand 151 states and 175 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 09:37:33,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:37:33,682 INFO L93 Difference]: Finished difference Result 258 states and 310 transitions. [2022-07-22 09:37:33,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-22 09:37:33,683 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 320 [2022-07-22 09:37:33,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:37:33,684 INFO L225 Difference]: With dead ends: 258 [2022-07-22 09:37:33,684 INFO L226 Difference]: Without dead ends: 167 [2022-07-22 09:37:33,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 653 GetRequests, 638 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-07-22 09:37:33,685 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 21 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:37:33,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 75 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:37:33,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-07-22 09:37:33,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2022-07-22 09:37:33,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 162 states have (on average 1.1419753086419753) internal successors, (185), 162 states have internal predecessors, (185), 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) [2022-07-22 09:37:33,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 191 transitions. [2022-07-22 09:37:33,696 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 191 transitions. Word has length 320 [2022-07-22 09:37:33,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:37:33,697 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 191 transitions. [2022-07-22 09:37:33,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 09:37:33,697 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 191 transitions. [2022-07-22 09:37:33,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2022-07-22 09:37:33,699 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:37:33,699 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 60, 20, 20, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:37:33,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-22 09:37:33,916 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 [2022-07-22 09:37:33,916 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:37:33,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:37:33,917 INFO L85 PathProgramCache]: Analyzing trace with hash -849918461, now seen corresponding path program 9 times [2022-07-22 09:37:33,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:37:33,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799683173] [2022-07-22 09:37:33,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:37:33,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:37:34,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:37:34,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-22 09:37:34,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:37:34,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-07-22 09:37:34,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:37:34,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 247 [2022-07-22 09:37:34,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:37:34,215 INFO L134 CoverageAnalysis]: Checked inductivity of 7871 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 7675 trivial. 0 not checked. [2022-07-22 09:37:34,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:37:34,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799683173] [2022-07-22 09:37:34,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799683173] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:37:34,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775269681] [2022-07-22 09:37:34,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 09:37:34,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:37:34,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:37:34,217 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) [2022-07-22 09:37:34,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-22 09:37:35,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-07-22 09:37:35,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:37:35,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 676 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-22 09:37:35,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:37:35,441 INFO L134 CoverageAnalysis]: Checked inductivity of 7871 backedges. 3290 proven. 196 refuted. 0 times theorem prover too weak. 4385 trivial. 0 not checked. [2022-07-22 09:37:35,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:37:35,579 INFO L134 CoverageAnalysis]: Checked inductivity of 7871 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 7675 trivial. 0 not checked. [2022-07-22 09:37:35,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775269681] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:37:35,579 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:37:35,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 22 [2022-07-22 09:37:35,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155739375] [2022-07-22 09:37:35,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:37:35,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-22 09:37:35,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:37:35,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-22 09:37:35,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2022-07-22 09:37:35,581 INFO L87 Difference]: Start difference. First operand 167 states and 191 transitions. Second operand has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 22 states have internal predecessors, (69), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 09:37:35,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:37:35,628 INFO L93 Difference]: Finished difference Result 268 states and 317 transitions. [2022-07-22 09:37:35,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-22 09:37:35,629 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 22 states have internal predecessors, (69), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 336 [2022-07-22 09:37:35,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:37:35,630 INFO L225 Difference]: With dead ends: 268 [2022-07-22 09:37:35,630 INFO L226 Difference]: Without dead ends: 177 [2022-07-22 09:37:35,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 693 GetRequests, 672 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2022-07-22 09:37:35,631 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 19 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:37:35,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 75 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:37:35,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-07-22 09:37:35,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2022-07-22 09:37:35,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 172 states have (on average 1.1337209302325582) internal successors, (195), 172 states have internal predecessors, (195), 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) [2022-07-22 09:37:35,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 201 transitions. [2022-07-22 09:37:35,636 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 201 transitions. Word has length 336 [2022-07-22 09:37:35,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:37:35,637 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 201 transitions. [2022-07-22 09:37:35,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 22 states have internal predecessors, (69), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 09:37:35,637 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 201 transitions. [2022-07-22 09:37:35,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2022-07-22 09:37:35,639 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:37:35,639 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 60, 20, 20, 19, 19, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:37:35,662 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-07-22 09:37:35,858 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 [2022-07-22 09:37:35,858 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:37:35,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:37:35,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1596627961, now seen corresponding path program 10 times [2022-07-22 09:37:35,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:37:35,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839978880] [2022-07-22 09:37:35,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:37:35,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:37:36,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:37:36,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-22 09:37:36,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:37:36,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-07-22 09:37:36,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:37:36,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2022-07-22 09:37:36,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:37:36,977 INFO L134 CoverageAnalysis]: Checked inductivity of 8036 backedges. 88 proven. 4084 refuted. 0 times theorem prover too weak. 3864 trivial. 0 not checked. [2022-07-22 09:37:36,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:37:36,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839978880] [2022-07-22 09:37:36,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839978880] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:37:36,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277694087] [2022-07-22 09:37:36,978 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 09:37:36,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:37:36,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:37:36,979 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) [2022-07-22 09:37:36,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-22 09:37:37,215 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 09:37:37,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:37:37,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 1160 conjuncts, 225 conjunts are in the unsatisfiable core [2022-07-22 09:37:37,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:37:37,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:37:37,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:37:37,511 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 09:37:37,512 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 09:37:37,514 INFO L356 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2022-07-22 09:37:37,514 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 51 [2022-07-22 09:37:37,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:37:37,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:37:37,580 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-07-22 09:37:37,580 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 40 treesize of output 42 [2022-07-22 09:37:37,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:37:37,676 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 25 treesize of output 24 [2022-07-22 09:37:37,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:37:37,707 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 25 treesize of output 24 [2022-07-22 09:37:37,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:37:37,738 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 25 treesize of output 24 [2022-07-22 09:37:37,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:37:37,770 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 25 treesize of output 24 [2022-07-22 09:37:37,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:37:37,803 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 25 treesize of output 24 [2022-07-22 09:37:37,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:37:37,837 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 25 treesize of output 24 [2022-07-22 09:37:37,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:37:37,873 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 25 treesize of output 24 [2022-07-22 09:37:37,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:37:37,911 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 25 treesize of output 24 [2022-07-22 09:37:37,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:37:37,950 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 25 treesize of output 24 [2022-07-22 09:37:37,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:37:37,986 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 25 treesize of output 24 [2022-07-22 09:37:38,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:37:38,022 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 25 treesize of output 24 [2022-07-22 09:37:38,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:37:38,062 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 25 treesize of output 24 [2022-07-22 09:37:38,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:37:38,101 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 25 treesize of output 24 [2022-07-22 09:37:38,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:37:38,144 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 25 treesize of output 24 [2022-07-22 09:37:38,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:37:38,185 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 25 treesize of output 24 [2022-07-22 09:37:38,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:37:38,226 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 25 treesize of output 24 [2022-07-22 09:37:38,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:37:38,268 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 25 treesize of output 24 [2022-07-22 09:37:38,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:37:38,297 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 23 treesize of output 22 [2022-07-22 09:37:50,802 INFO L134 CoverageAnalysis]: Checked inductivity of 8036 backedges. 4962 proven. 1227 refuted. 0 times theorem prover too weak. 1847 trivial. 0 not checked. [2022-07-22 09:37:50,802 INFO L328 TraceCheckSpWp]: Computing backward predicates...