./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/reducercommutativity/sep.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/reducercommutativity/sep.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 54d2da4a9e5a645ffa7361038eff25cc32e29a265e0324de9bda9a6d773becac --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 22:32:00,154 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 22:32:00,157 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 22:32:00,227 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 22:32:00,228 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 22:32:00,232 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 22:32:00,233 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 22:32:00,236 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 22:32:00,237 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 22:32:00,241 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 22:32:00,242 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 22:32:00,243 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 22:32:00,243 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 22:32:00,246 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 22:32:00,249 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 22:32:00,253 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 22:32:00,254 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 22:32:00,255 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 22:32:00,257 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 22:32:00,261 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 22:32:00,262 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 22:32:00,263 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 22:32:00,265 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 22:32:00,266 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 22:32:00,273 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 22:32:00,273 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 22:32:00,273 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 22:32:00,275 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 22:32:00,275 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 22:32:00,276 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 22:32:00,276 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 22:32:00,277 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 22:32:00,278 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 22:32:00,280 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 22:32:00,281 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 22:32:00,281 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 22:32:00,281 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 22:32:00,282 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 22:32:00,282 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 22:32:00,283 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 22:32:00,283 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 22:32:00,284 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 22:32:00,314 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 22:32:00,314 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 22:32:00,315 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 22:32:00,315 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 22:32:00,316 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 22:32:00,316 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 22:32:00,317 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 22:32:00,317 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 22:32:00,317 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 22:32:00,317 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 22:32:00,318 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 22:32:00,318 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 22:32:00,318 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 22:32:00,319 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 22:32:00,319 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 22:32:00,319 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 22:32:00,319 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 22:32:00,319 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 22:32:00,320 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 22:32:00,320 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 22:32:00,320 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 22:32:00,320 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 22:32:00,320 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 22:32:00,321 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 22:32:00,321 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 22:32:00,321 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 22:32:00,321 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 22:32:00,321 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 22:32:00,322 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 22:32:00,322 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 22:32:00,322 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 22:32:00,322 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 22:32:00,322 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 22:32:00,323 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 22:32:00,323 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 54d2da4a9e5a645ffa7361038eff25cc32e29a265e0324de9bda9a6d773becac [2021-12-16 22:32:00,564 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 22:32:00,581 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 22:32:00,584 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 22:32:00,585 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 22:32:00,585 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 22:32:00,586 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/sep.i [2021-12-16 22:32:00,654 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e65a195de/65cfdff1f6fc4c19b08f3f27c5fab1db/FLAG3a14deb44 [2021-12-16 22:32:01,004 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 22:32:01,004 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/sep.i [2021-12-16 22:32:01,009 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e65a195de/65cfdff1f6fc4c19b08f3f27c5fab1db/FLAG3a14deb44 [2021-12-16 22:32:01,020 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e65a195de/65cfdff1f6fc4c19b08f3f27c5fab1db [2021-12-16 22:32:01,022 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 22:32:01,023 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 22:32:01,024 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 22:32:01,024 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 22:32:01,027 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 22:32:01,027 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 10:32:01" (1/1) ... [2021-12-16 22:32:01,028 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@181fe28d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:32:01, skipping insertion in model container [2021-12-16 22:32:01,028 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 10:32:01" (1/1) ... [2021-12-16 22:32:01,034 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 22:32:01,044 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 22:32:01,227 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/sep.i[1298,1311] [2021-12-16 22:32:01,229 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 22:32:01,236 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 22:32:01,271 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/sep.i[1298,1311] [2021-12-16 22:32:01,272 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 22:32:01,284 INFO L208 MainTranslator]: Completed translation [2021-12-16 22:32:01,285 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:32:01 WrapperNode [2021-12-16 22:32:01,285 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 22:32:01,286 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 22:32:01,286 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 22:32:01,286 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 22:32:01,292 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:32:01" (1/1) ... [2021-12-16 22:32:01,305 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:32:01" (1/1) ... [2021-12-16 22:32:01,325 INFO L137 Inliner]: procedures = 16, calls = 26, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 65 [2021-12-16 22:32:01,326 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 22:32:01,327 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 22:32:01,327 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 22:32:01,327 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 22:32:01,334 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:32:01" (1/1) ... [2021-12-16 22:32:01,334 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:32:01" (1/1) ... [2021-12-16 22:32:01,339 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:32:01" (1/1) ... [2021-12-16 22:32:01,339 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:32:01" (1/1) ... [2021-12-16 22:32:01,356 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:32:01" (1/1) ... [2021-12-16 22:32:01,360 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:32:01" (1/1) ... [2021-12-16 22:32:01,365 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:32:01" (1/1) ... [2021-12-16 22:32:01,367 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 22:32:01,369 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 22:32:01,370 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 22:32:01,370 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 22:32:01,371 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:32:01" (1/1) ... [2021-12-16 22:32:01,383 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 22:32:01,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:32:01,404 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) [2021-12-16 22:32:01,419 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 [2021-12-16 22:32:01,452 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 22:32:01,453 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 22:32:01,453 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-16 22:32:01,453 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-16 22:32:01,453 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 22:32:01,453 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 22:32:01,453 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-16 22:32:01,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 22:32:01,454 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2021-12-16 22:32:01,454 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2021-12-16 22:32:01,522 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 22:32:01,523 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 22:32:01,627 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 22:32:01,632 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 22:32:01,632 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-16 22:32:01,634 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 10:32:01 BoogieIcfgContainer [2021-12-16 22:32:01,634 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 22:32:01,635 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 22:32:01,635 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 22:32:01,638 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 22:32:01,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 10:32:01" (1/3) ... [2021-12-16 22:32:01,639 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d77f956 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 10:32:01, skipping insertion in model container [2021-12-16 22:32:01,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:32:01" (2/3) ... [2021-12-16 22:32:01,639 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d77f956 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 10:32:01, skipping insertion in model container [2021-12-16 22:32:01,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 10:32:01" (3/3) ... [2021-12-16 22:32:01,641 INFO L111 eAbstractionObserver]: Analyzing ICFG sep.i [2021-12-16 22:32:01,644 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 22:32:01,645 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-16 22:32:01,680 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 22:32:01,700 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-16 22:32:01,701 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-16 22:32:01,713 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 21 states have (on average 1.380952380952381) internal successors, (29), 22 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 22:32:01,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-16 22:32:01,718 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:32:01,719 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:32:01,720 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:32:01,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:32:01,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1158480486, now seen corresponding path program 1 times [2021-12-16 22:32:01,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:32:01,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041162487] [2021-12-16 22:32:01,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:32:01,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:32:01,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:01,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 22:32:02,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:02,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 22:32:02,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:02,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 22:32:02,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:02,074 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-16 22:32:02,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:32:02,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041162487] [2021-12-16 22:32:02,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041162487] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:32:02,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80240176] [2021-12-16 22:32:02,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:32:02,079 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:32:02,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:32:02,084 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) [2021-12-16 22:32:02,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 22:32:02,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:02,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-16 22:32:02,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:32:02,264 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 22:32:02,264 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 22:32:02,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80240176] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 22:32:02,265 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 22:32:02,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 5 [2021-12-16 22:32:02,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151863775] [2021-12-16 22:32:02,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 22:32:02,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-16 22:32:02,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:32:02,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-16 22:32:02,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 22:32:02,294 INFO L87 Difference]: Start difference. First operand has 27 states, 21 states have (on average 1.380952380952381) internal successors, (29), 22 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-16 22:32:02,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:32:02,317 INFO L93 Difference]: Finished difference Result 50 states and 67 transitions. [2021-12-16 22:32:02,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-16 22:32:02,319 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2021-12-16 22:32:02,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:32:02,325 INFO L225 Difference]: With dead ends: 50 [2021-12-16 22:32:02,326 INFO L226 Difference]: Without dead ends: 22 [2021-12-16 22:32:02,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 22:32:02,335 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:32:02,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 22:32:02,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-12-16 22:32:02,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-12-16 22:32:02,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 22:32:02,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2021-12-16 22:32:02,375 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 28 [2021-12-16 22:32:02,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:32:02,377 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2021-12-16 22:32:02,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-16 22:32:02,378 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2021-12-16 22:32:02,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-16 22:32:02,380 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:32:02,381 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:32:02,404 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-16 22:32:02,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-12-16 22:32:02,586 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:32:02,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:32:02,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1033293076, now seen corresponding path program 1 times [2021-12-16 22:32:02,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:32:02,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073839541] [2021-12-16 22:32:02,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:32:02,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:32:02,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:02,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 22:32:02,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:02,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 22:32:02,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:02,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 22:32:02,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:02,701 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-16 22:32:02,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:32:02,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073839541] [2021-12-16 22:32:02,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073839541] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:32:02,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198179480] [2021-12-16 22:32:02,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:32:02,705 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:32:02,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:32:02,706 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) [2021-12-16 22:32:02,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 22:32:02,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:02,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 22:32:02,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:32:02,853 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-16 22:32:02,854 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 22:32:02,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198179480] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 22:32:02,854 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 22:32:02,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2021-12-16 22:32:02,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314713329] [2021-12-16 22:32:02,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 22:32:02,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 22:32:02,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:32:02,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 22:32:02,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-16 22:32:02,857 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-16 22:32:02,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:32:02,885 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2021-12-16 22:32:02,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 22:32:02,885 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2021-12-16 22:32:02,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:32:02,886 INFO L225 Difference]: With dead ends: 43 [2021-12-16 22:32:02,886 INFO L226 Difference]: Without dead ends: 25 [2021-12-16 22:32:02,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-16 22:32:02,888 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 28 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:32:02,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 30 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 22:32:02,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-12-16 22:32:02,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2021-12-16 22:32:02,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 22:32:02,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-12-16 22:32:02,894 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 28 [2021-12-16 22:32:02,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:32:02,894 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-12-16 22:32:02,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-16 22:32:02,894 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-12-16 22:32:02,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-16 22:32:02,895 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:32:02,895 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:32:02,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-16 22:32:03,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-12-16 22:32:03,111 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:32:03,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:32:03,112 INFO L85 PathProgramCache]: Analyzing trace with hash -14370886, now seen corresponding path program 1 times [2021-12-16 22:32:03,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:32:03,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914697610] [2021-12-16 22:32:03,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:32:03,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:32:03,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:03,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 22:32:03,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:03,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 22:32:03,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:03,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-16 22:32:03,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:03,240 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-16 22:32:03,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:32:03,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914697610] [2021-12-16 22:32:03,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914697610] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 22:32:03,241 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 22:32:03,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 22:32:03,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529977742] [2021-12-16 22:32:03,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 22:32:03,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 22:32:03,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:32:03,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 22:32:03,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-16 22:32:03,243 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-16 22:32:03,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:32:03,269 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2021-12-16 22:32:03,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 22:32:03,269 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2021-12-16 22:32:03,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:32:03,270 INFO L225 Difference]: With dead ends: 39 [2021-12-16 22:32:03,270 INFO L226 Difference]: Without dead ends: 25 [2021-12-16 22:32:03,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-16 22:32:03,272 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 21 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:32:03,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 30 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 22:32:03,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-12-16 22:32:03,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-12-16 22:32:03,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 22:32:03,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-12-16 22:32:03,277 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 37 [2021-12-16 22:32:03,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:32:03,278 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-12-16 22:32:03,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-16 22:32:03,278 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-12-16 22:32:03,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-16 22:32:03,279 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:32:03,279 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:32:03,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-16 22:32:03,279 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:32:03,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:32:03,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1444896732, now seen corresponding path program 1 times [2021-12-16 22:32:03,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:32:03,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594269558] [2021-12-16 22:32:03,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:32:03,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:32:03,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:03,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 22:32:03,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:03,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 22:32:03,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:03,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 22:32:03,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:03,387 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-16 22:32:03,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:32:03,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594269558] [2021-12-16 22:32:03,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594269558] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:32:03,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023620559] [2021-12-16 22:32:03,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:32:03,390 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:32:03,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:32:03,392 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) [2021-12-16 22:32:03,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 22:32:03,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:03,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 22:32:03,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:32:03,607 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-16 22:32:03,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:32:03,727 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-16 22:32:03,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023620559] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:32:03,728 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:32:03,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 10 [2021-12-16 22:32:03,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738056295] [2021-12-16 22:32:03,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:32:03,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-16 22:32:03,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:32:03,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-16 22:32:03,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-16 22:32:03,730 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-16 22:32:03,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:32:03,789 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2021-12-16 22:32:03,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 22:32:03,790 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2021-12-16 22:32:03,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:32:03,790 INFO L225 Difference]: With dead ends: 49 [2021-12-16 22:32:03,791 INFO L226 Difference]: Without dead ends: 29 [2021-12-16 22:32:03,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 77 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-12-16 22:32:03,792 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 28 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:32:03,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 65 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 22:32:03,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-16 22:32:03,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2021-12-16 22:32:03,795 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) [2021-12-16 22:32:03,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2021-12-16 22:32:03,796 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 39 [2021-12-16 22:32:03,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:32:03,797 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2021-12-16 22:32:03,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-16 22:32:03,797 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2021-12-16 22:32:03,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-16 22:32:03,798 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:32:03,798 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:32:03,820 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-16 22:32:04,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:32:04,020 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:32:04,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:32:04,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1089239822, now seen corresponding path program 2 times [2021-12-16 22:32:04,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:32:04,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889510763] [2021-12-16 22:32:04,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:32:04,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:32:04,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:04,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 22:32:04,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:04,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-16 22:32:04,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:04,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-16 22:32:04,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:04,530 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-16 22:32:04,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:32:04,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889510763] [2021-12-16 22:32:04,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889510763] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:32:04,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553033692] [2021-12-16 22:32:04,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 22:32:04,532 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:32:04,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:32:04,533 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) [2021-12-16 22:32:04,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 22:32:04,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 22:32:04,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:32:04,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-16 22:32:04,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:32:05,033 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-16 22:32:05,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:32:05,407 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-16 22:32:05,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553033692] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:32:05,407 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:32:05,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 20 [2021-12-16 22:32:05,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576604154] [2021-12-16 22:32:05,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:32:05,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-16 22:32:05,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:32:05,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-16 22:32:05,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-12-16 22:32:05,409 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 15 states have internal predecessors, (40), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-16 22:32:05,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:32:05,580 INFO L93 Difference]: Finished difference Result 73 states and 101 transitions. [2021-12-16 22:32:05,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-16 22:32:05,581 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 15 states have internal predecessors, (40), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 48 [2021-12-16 22:32:05,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:32:05,583 INFO L225 Difference]: With dead ends: 73 [2021-12-16 22:32:05,583 INFO L226 Difference]: Without dead ends: 69 [2021-12-16 22:32:05,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 82 SyntacticMatches, 17 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-12-16 22:32:05,584 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 35 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:32:05,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 461 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 22:32:05,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-12-16 22:32:05,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 49. [2021-12-16 22:32:05,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 42 states have internal predecessors, (52), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2021-12-16 22:32:05,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 66 transitions. [2021-12-16 22:32:05,599 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 66 transitions. Word has length 48 [2021-12-16 22:32:05,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:32:05,599 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 66 transitions. [2021-12-16 22:32:05,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 15 states have internal predecessors, (40), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-16 22:32:05,599 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 66 transitions. [2021-12-16 22:32:05,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-16 22:32:05,603 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:32:05,603 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:32:05,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-16 22:32:05,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:32:05,811 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:32:05,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:32:05,812 INFO L85 PathProgramCache]: Analyzing trace with hash -409181452, now seen corresponding path program 1 times [2021-12-16 22:32:05,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:32:05,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000832560] [2021-12-16 22:32:05,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:32:05,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:32:05,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:06,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 22:32:06,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:06,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-16 22:32:06,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:06,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-16 22:32:06,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:06,227 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 20 proven. 46 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-16 22:32:06,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:32:06,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000832560] [2021-12-16 22:32:06,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000832560] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:32:06,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706221896] [2021-12-16 22:32:06,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:32:06,228 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:32:06,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:32:06,229 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) [2021-12-16 22:32:06,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-16 22:32:06,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:06,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-16 22:32:06,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:32:06,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 22:32:06,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-12-16 22:32:06,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-12-16 22:32:07,026 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 69 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-16 22:32:07,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:32:07,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2021-12-16 22:32:07,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2021-12-16 22:32:07,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-12-16 22:32:07,729 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 6 proven. 67 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-16 22:32:07,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706221896] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:32:07,730 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:32:07,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 20, 19] total 43 [2021-12-16 22:32:07,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658716426] [2021-12-16 22:32:07,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:32:07,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-16 22:32:07,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:32:07,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-16 22:32:07,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=1554, Unknown=0, NotChecked=0, Total=1806 [2021-12-16 22:32:07,732 INFO L87 Difference]: Start difference. First operand 49 states and 66 transitions. Second operand has 43 states, 39 states have (on average 2.5128205128205128) internal successors, (98), 41 states have internal predecessors, (98), 8 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 6 states have call predecessors, (9), 8 states have call successors, (9) [2021-12-16 22:32:10,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:32:10,753 INFO L93 Difference]: Finished difference Result 298 states and 450 transitions. [2021-12-16 22:32:10,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-12-16 22:32:10,754 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 39 states have (on average 2.5128205128205128) internal successors, (98), 41 states have internal predecessors, (98), 8 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 6 states have call predecessors, (9), 8 states have call successors, (9) Word has length 48 [2021-12-16 22:32:10,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:32:10,758 INFO L225 Difference]: With dead ends: 298 [2021-12-16 22:32:10,758 INFO L226 Difference]: Without dead ends: 257 [2021-12-16 22:32:10,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 86 SyntacticMatches, 6 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3830 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1994, Invalid=10888, Unknown=0, NotChecked=0, Total=12882 [2021-12-16 22:32:10,764 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 351 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 1095 mSolverCounterSat, 329 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 1680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 329 IncrementalHoareTripleChecker+Valid, 1095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 256 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-16 22:32:10,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [373 Valid, 357 Invalid, 1680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [329 Valid, 1095 Invalid, 0 Unknown, 256 Unchecked, 0.8s Time] [2021-12-16 22:32:10,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-12-16 22:32:10,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 163. [2021-12-16 22:32:10,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 141 states have (on average 1.3191489361702127) internal successors, (186), 144 states have internal predecessors, (186), 13 states have call successors, (13), 5 states have call predecessors, (13), 8 states have return successors, (55), 13 states have call predecessors, (55), 13 states have call successors, (55) [2021-12-16 22:32:10,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 254 transitions. [2021-12-16 22:32:10,796 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 254 transitions. Word has length 48 [2021-12-16 22:32:10,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:32:10,796 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 254 transitions. [2021-12-16 22:32:10,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 39 states have (on average 2.5128205128205128) internal successors, (98), 41 states have internal predecessors, (98), 8 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 6 states have call predecessors, (9), 8 states have call successors, (9) [2021-12-16 22:32:10,797 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 254 transitions. [2021-12-16 22:32:10,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-16 22:32:10,800 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:32:10,800 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:32:10,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-16 22:32:11,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:32:11,021 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:32:11,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:32:11,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1360360308, now seen corresponding path program 2 times [2021-12-16 22:32:11,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:32:11,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601185007] [2021-12-16 22:32:11,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:32:11,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:32:11,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:11,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 22:32:11,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:11,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-16 22:32:11,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:11,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-16 22:32:11,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:11,318 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 2 proven. 67 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-16 22:32:11,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:32:11,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601185007] [2021-12-16 22:32:11,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601185007] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:32:11,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987768227] [2021-12-16 22:32:11,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 22:32:11,319 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:32:11,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:32:11,320 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) [2021-12-16 22:32:11,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-16 22:32:11,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 22:32:11,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:32:11,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-16 22:32:11,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:32:11,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:32:11,485 INFO L388 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 46 treesize of output 28 [2021-12-16 22:32:11,661 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 44 proven. 27 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-16 22:32:11,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:32:11,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 30 [2021-12-16 22:32:11,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2021-12-16 22:32:11,971 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-12-16 22:32:11,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 32 [2021-12-16 22:32:12,032 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 3 proven. 65 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-16 22:32:12,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987768227] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:32:12,032 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:32:12,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 11] total 24 [2021-12-16 22:32:12,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936092574] [2021-12-16 22:32:12,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:32:12,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-16 22:32:12,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:32:12,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-16 22:32:12,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-12-16 22:32:12,034 INFO L87 Difference]: Start difference. First operand 163 states and 254 transitions. Second operand has 24 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 states have internal predecessors, (66), 5 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2021-12-16 22:32:12,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:32:12,546 INFO L93 Difference]: Finished difference Result 375 states and 569 transitions. [2021-12-16 22:32:12,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-16 22:32:12,547 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 states have internal predecessors, (66), 5 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) Word has length 48 [2021-12-16 22:32:12,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:32:12,550 INFO L225 Difference]: With dead ends: 375 [2021-12-16 22:32:12,550 INFO L226 Difference]: Without dead ends: 234 [2021-12-16 22:32:12,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 86 SyntacticMatches, 9 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=203, Invalid=1057, Unknown=0, NotChecked=0, Total=1260 [2021-12-16 22:32:12,552 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 55 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 152 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 22:32:12,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 321 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 397 Invalid, 0 Unknown, 152 Unchecked, 0.3s Time] [2021-12-16 22:32:12,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-12-16 22:32:12,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 204. [2021-12-16 22:32:12,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 177 states have (on average 1.3220338983050848) internal successors, (234), 181 states have internal predecessors, (234), 14 states have call successors, (14), 8 states have call predecessors, (14), 12 states have return successors, (72), 14 states have call predecessors, (72), 14 states have call successors, (72) [2021-12-16 22:32:12,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 320 transitions. [2021-12-16 22:32:12,601 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 320 transitions. Word has length 48 [2021-12-16 22:32:12,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:32:12,602 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 320 transitions. [2021-12-16 22:32:12,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 states have internal predecessors, (66), 5 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2021-12-16 22:32:12,602 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 320 transitions. [2021-12-16 22:32:12,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-16 22:32:12,609 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:32:12,609 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:32:12,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-16 22:32:12,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:32:12,823 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:32:12,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:32:12,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1548403594, now seen corresponding path program 3 times [2021-12-16 22:32:12,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:32:12,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61952746] [2021-12-16 22:32:12,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:32:12,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:32:12,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:13,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 22:32:13,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:13,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-16 22:32:13,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:13,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-16 22:32:13,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:13,202 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 20 proven. 46 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-16 22:32:13,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:32:13,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61952746] [2021-12-16 22:32:13,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61952746] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:32:13,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999541462] [2021-12-16 22:32:13,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 22:32:13,203 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:32:13,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:32:13,208 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) [2021-12-16 22:32:13,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-16 22:32:13,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-16 22:32:13,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:32:13,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-16 22:32:13,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:32:13,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:32:13,388 INFO L388 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 22 treesize of output 17 [2021-12-16 22:32:13,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-12-16 22:32:13,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-12-16 22:32:14,048 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 22 proven. 52 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 22:32:14,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:32:14,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999541462] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:32:14,133 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 22:32:14,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 18] total 29 [2021-12-16 22:32:14,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499006048] [2021-12-16 22:32:14,133 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 22:32:14,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-16 22:32:14,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:32:14,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-16 22:32:14,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-12-16 22:32:14,134 INFO L87 Difference]: Start difference. First operand 204 states and 320 transitions. Second operand has 29 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 4 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-16 22:32:15,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:32:15,695 INFO L93 Difference]: Finished difference Result 332 states and 500 transitions. [2021-12-16 22:32:15,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-12-16 22:32:15,695 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 4 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 48 [2021-12-16 22:32:15,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:32:15,698 INFO L225 Difference]: With dead ends: 332 [2021-12-16 22:32:15,698 INFO L226 Difference]: Without dead ends: 301 [2021-12-16 22:32:15,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1232 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=460, Invalid=3962, Unknown=0, NotChecked=0, Total=4422 [2021-12-16 22:32:15,700 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 99 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 919 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 1487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 503 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-16 22:32:15,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 492 Invalid, 1487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 919 Invalid, 0 Unknown, 503 Unchecked, 0.6s Time] [2021-12-16 22:32:15,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-12-16 22:32:15,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 236. [2021-12-16 22:32:15,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 206 states have (on average 1.2864077669902914) internal successors, (265), 209 states have internal predecessors, (265), 16 states have call successors, (16), 10 states have call predecessors, (16), 13 states have return successors, (87), 16 states have call predecessors, (87), 16 states have call successors, (87) [2021-12-16 22:32:15,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 368 transitions. [2021-12-16 22:32:15,744 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 368 transitions. Word has length 48 [2021-12-16 22:32:15,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:32:15,745 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 368 transitions. [2021-12-16 22:32:15,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 4 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-16 22:32:15,745 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 368 transitions. [2021-12-16 22:32:15,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-16 22:32:15,747 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:32:15,747 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:32:15,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-16 22:32:15,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:32:15,971 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:32:15,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:32:15,972 INFO L85 PathProgramCache]: Analyzing trace with hash -868345224, now seen corresponding path program 4 times [2021-12-16 22:32:15,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:32:15,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561647033] [2021-12-16 22:32:15,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:32:15,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:32:16,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:16,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 22:32:16,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:16,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-16 22:32:16,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:16,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-16 22:32:16,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:16,278 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 4 proven. 55 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-16 22:32:16,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:32:16,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561647033] [2021-12-16 22:32:16,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561647033] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:32:16,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799069731] [2021-12-16 22:32:16,279 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 22:32:16,280 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:32:16,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:32:16,284 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) [2021-12-16 22:32:16,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-16 22:32:16,357 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 22:32:16,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:32:16,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-16 22:32:16,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:32:16,664 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-16 22:32:16,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:32:16,947 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-16 22:32:16,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799069731] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:32:16,948 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:32:16,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 20 [2021-12-16 22:32:16,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175144641] [2021-12-16 22:32:16,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:32:16,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-16 22:32:16,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:32:16,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-16 22:32:16,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-12-16 22:32:16,951 INFO L87 Difference]: Start difference. First operand 236 states and 368 transitions. Second operand has 20 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 16 states have internal predecessors, (50), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-16 22:32:17,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:32:17,130 INFO L93 Difference]: Finished difference Result 390 states and 731 transitions. [2021-12-16 22:32:17,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 22:32:17,131 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 16 states have internal predecessors, (50), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 48 [2021-12-16 22:32:17,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:32:17,137 INFO L225 Difference]: With dead ends: 390 [2021-12-16 22:32:17,137 INFO L226 Difference]: Without dead ends: 386 [2021-12-16 22:32:17,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 83 SyntacticMatches, 17 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-12-16 22:32:17,140 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 28 mSDsluCounter, 676 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 743 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:32:17,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 743 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 22:32:17,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-12-16 22:32:17,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 324. [2021-12-16 22:32:17,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 283 states have (on average 1.325088339222615) internal successors, (375), 290 states have internal predecessors, (375), 23 states have call successors, (23), 10 states have call predecessors, (23), 17 states have return successors, (151), 23 states have call predecessors, (151), 23 states have call successors, (151) [2021-12-16 22:32:17,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 549 transitions. [2021-12-16 22:32:17,195 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 549 transitions. Word has length 48 [2021-12-16 22:32:17,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:32:17,196 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 549 transitions. [2021-12-16 22:32:17,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 16 states have internal predecessors, (50), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-16 22:32:17,196 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 549 transitions. [2021-12-16 22:32:17,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-16 22:32:17,199 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:32:17,200 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:32:17,226 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-16 22:32:17,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-16 22:32:17,414 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:32:17,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:32:17,414 INFO L85 PathProgramCache]: Analyzing trace with hash -610179786, now seen corresponding path program 5 times [2021-12-16 22:32:17,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:32:17,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530728713] [2021-12-16 22:32:17,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:32:17,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:32:17,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:17,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 22:32:17,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:17,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-16 22:32:17,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:17,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-16 22:32:17,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:17,803 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 40 proven. 31 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-16 22:32:17,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:32:17,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530728713] [2021-12-16 22:32:17,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530728713] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:32:17,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871987215] [2021-12-16 22:32:17,803 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 22:32:17,803 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:32:17,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:32:17,804 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) [2021-12-16 22:32:17,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-16 22:32:17,970 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-16 22:32:17,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:32:17,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-16 22:32:17,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:32:18,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 22:32:18,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:32:18,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 22:32:18,241 INFO L354 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2021-12-16 22:32:18,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 31 [2021-12-16 22:32:18,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:32:18,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 22:32:18,311 INFO L354 Elim1Store]: treesize reduction 59, result has 24.4 percent of original size [2021-12-16 22:32:18,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 45 treesize of output 48 [2021-12-16 22:32:18,508 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 43 proven. 28 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-16 22:32:18,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:32:20,332 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 43 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-16 22:32:20,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871987215] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:32:20,332 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:32:20,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 13] total 38 [2021-12-16 22:32:20,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396665406] [2021-12-16 22:32:20,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:32:20,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-16 22:32:20,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:32:20,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-16 22:32:20,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1261, Unknown=2, NotChecked=0, Total=1406 [2021-12-16 22:32:20,334 INFO L87 Difference]: Start difference. First operand 324 states and 549 transitions. Second operand has 38 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 states have internal predecessors, (89), 5 states have call successors, (9), 2 states have call predecessors, (9), 7 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2021-12-16 22:32:20,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:32:20,924 INFO L93 Difference]: Finished difference Result 430 states and 728 transitions. [2021-12-16 22:32:20,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-16 22:32:20,925 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 states have internal predecessors, (89), 5 states have call successors, (9), 2 states have call predecessors, (9), 7 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 48 [2021-12-16 22:32:20,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:32:20,929 INFO L225 Difference]: With dead ends: 430 [2021-12-16 22:32:20,929 INFO L226 Difference]: Without dead ends: 420 [2021-12-16 22:32:20,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 78 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=283, Invalid=2067, Unknown=2, NotChecked=0, Total=2352 [2021-12-16 22:32:20,931 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 47 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 242 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 22:32:20,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 345 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 301 Invalid, 0 Unknown, 242 Unchecked, 0.2s Time] [2021-12-16 22:32:20,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-12-16 22:32:20,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 383. [2021-12-16 22:32:20,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 335 states have (on average 1.3223880597014925) internal successors, (443), 345 states have internal predecessors, (443), 27 states have call successors, (27), 12 states have call predecessors, (27), 20 states have return successors, (185), 25 states have call predecessors, (185), 27 states have call successors, (185) [2021-12-16 22:32:20,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 655 transitions. [2021-12-16 22:32:20,976 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 655 transitions. Word has length 48 [2021-12-16 22:32:20,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:32:20,976 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 655 transitions. [2021-12-16 22:32:20,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 states have internal predecessors, (89), 5 states have call successors, (9), 2 states have call predecessors, (9), 7 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2021-12-16 22:32:20,977 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 655 transitions. [2021-12-16 22:32:20,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-16 22:32:20,979 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:32:20,979 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:32:21,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-16 22:32:21,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-16 22:32:21,204 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:32:21,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:32:21,204 INFO L85 PathProgramCache]: Analyzing trace with hash -841093328, now seen corresponding path program 6 times [2021-12-16 22:32:21,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:32:21,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348979954] [2021-12-16 22:32:21,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:32:21,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:32:21,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:21,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 22:32:21,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:21,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-16 22:32:21,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:21,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-16 22:32:21,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:21,812 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 20 proven. 51 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-16 22:32:21,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:32:21,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348979954] [2021-12-16 22:32:21,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348979954] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:32:21,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752115906] [2021-12-16 22:32:21,813 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 22:32:21,813 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:32:21,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:32:21,814 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) [2021-12-16 22:32:21,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-16 22:32:21,961 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-12-16 22:32:21,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:32:21,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-16 22:32:21,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:32:22,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:32:22,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-12-16 22:32:22,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:32:22,291 INFO L388 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 41 treesize of output 28 [2021-12-16 22:32:22,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:32:22,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:32:22,367 INFO L354 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2021-12-16 22:32:22,368 INFO L388 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 49 treesize of output 49 [2021-12-16 22:32:22,566 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 1 proven. 69 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-16 22:32:22,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:32:23,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752115906] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:32:23,529 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 22:32:23,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17] total 33 [2021-12-16 22:32:23,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146922062] [2021-12-16 22:32:23,530 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 22:32:23,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-16 22:32:23,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:32:23,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-16 22:32:23,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1389, Unknown=1, NotChecked=0, Total=1560 [2021-12-16 22:32:23,531 INFO L87 Difference]: Start difference. First operand 383 states and 655 transitions. Second operand has 33 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 29 states have internal predecessors, (70), 4 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-16 22:32:24,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:32:24,808 INFO L93 Difference]: Finished difference Result 789 states and 1288 transitions. [2021-12-16 22:32:24,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-16 22:32:24,809 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 29 states have internal predecessors, (70), 4 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 48 [2021-12-16 22:32:24,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:32:24,813 INFO L225 Difference]: With dead ends: 789 [2021-12-16 22:32:24,813 INFO L226 Difference]: Without dead ends: 628 [2021-12-16 22:32:24,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 61 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=501, Invalid=3788, Unknown=1, NotChecked=0, Total=4290 [2021-12-16 22:32:24,816 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 102 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 263 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 22:32:24,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 417 Invalid, 962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 631 Invalid, 0 Unknown, 263 Unchecked, 0.4s Time] [2021-12-16 22:32:24,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2021-12-16 22:32:24,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 533. [2021-12-16 22:32:24,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 468 states have (on average 1.3183760683760684) internal successors, (617), 479 states have internal predecessors, (617), 38 states have call successors, (38), 16 states have call predecessors, (38), 26 states have return successors, (221), 37 states have call predecessors, (221), 38 states have call successors, (221) [2021-12-16 22:32:24,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 876 transitions. [2021-12-16 22:32:24,858 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 876 transitions. Word has length 48 [2021-12-16 22:32:24,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:32:24,858 INFO L470 AbstractCegarLoop]: Abstraction has 533 states and 876 transitions. [2021-12-16 22:32:24,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 29 states have internal predecessors, (70), 4 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-16 22:32:24,858 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 876 transitions. [2021-12-16 22:32:24,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-16 22:32:24,861 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:32:24,861 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:32:24,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-16 22:32:25,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-16 22:32:25,088 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:32:25,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:32:25,088 INFO L85 PathProgramCache]: Analyzing trace with hash -299993678, now seen corresponding path program 1 times [2021-12-16 22:32:25,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:32:25,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417668289] [2021-12-16 22:32:25,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:32:25,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:32:25,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:25,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 22:32:25,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:25,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-16 22:32:25,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:25,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-16 22:32:25,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:25,342 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-16 22:32:25,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:32:25,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417668289] [2021-12-16 22:32:25,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417668289] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:32:25,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932924873] [2021-12-16 22:32:25,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:32:25,343 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:32:25,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:32:25,348 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) [2021-12-16 22:32:25,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-16 22:32:25,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:25,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-16 22:32:25,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:32:25,936 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-16 22:32:25,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:32:26,276 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-16 22:32:26,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932924873] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:32:26,277 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:32:26,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 17 [2021-12-16 22:32:26,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380608571] [2021-12-16 22:32:26,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:32:26,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-16 22:32:26,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:32:26,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-16 22:32:26,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-12-16 22:32:26,278 INFO L87 Difference]: Start difference. First operand 533 states and 876 transitions. Second operand has 17 states, 16 states have (on average 2.0625) internal successors, (33), 13 states have internal predecessors, (33), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-16 22:32:26,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:32:26,428 INFO L93 Difference]: Finished difference Result 723 states and 1458 transitions. [2021-12-16 22:32:26,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-16 22:32:26,428 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 13 states have internal predecessors, (33), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 48 [2021-12-16 22:32:26,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:32:26,434 INFO L225 Difference]: With dead ends: 723 [2021-12-16 22:32:26,434 INFO L226 Difference]: Without dead ends: 719 [2021-12-16 22:32:26,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 84 SyntacticMatches, 18 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-12-16 22:32:26,436 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 28 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:32:26,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 657 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 22:32:26,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2021-12-16 22:32:26,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 619. [2021-12-16 22:32:26,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 545 states have (on average 1.343119266055046) internal successors, (732), 561 states have internal predecessors, (732), 43 states have call successors, (43), 16 states have call predecessors, (43), 30 states have return successors, (313), 41 states have call predecessors, (313), 43 states have call successors, (313) [2021-12-16 22:32:26,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 1088 transitions. [2021-12-16 22:32:26,513 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 1088 transitions. Word has length 48 [2021-12-16 22:32:26,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:32:26,514 INFO L470 AbstractCegarLoop]: Abstraction has 619 states and 1088 transitions. [2021-12-16 22:32:26,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 13 states have internal predecessors, (33), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-16 22:32:26,514 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 1088 transitions. [2021-12-16 22:32:26,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-16 22:32:26,518 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:32:26,518 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:32:26,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-16 22:32:26,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-16 22:32:26,732 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:32:26,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:32:26,732 INFO L85 PathProgramCache]: Analyzing trace with hash 485005286, now seen corresponding path program 3 times [2021-12-16 22:32:26,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:32:26,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450224521] [2021-12-16 22:32:26,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:32:26,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:32:26,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:26,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 22:32:26,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:26,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-16 22:32:26,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:26,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-16 22:32:26,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:26,815 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 32 proven. 59 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-16 22:32:26,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:32:26,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450224521] [2021-12-16 22:32:26,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450224521] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:32:26,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003456122] [2021-12-16 22:32:26,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 22:32:26,816 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:32:26,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:32:26,817 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) [2021-12-16 22:32:26,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-16 22:32:26,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-16 22:32:26,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:32:26,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 22:32:26,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:32:27,005 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 68 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-16 22:32:27,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:32:27,134 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 66 proven. 1 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-16 22:32:27,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003456122] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:32:27,134 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:32:27,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 9] total 18 [2021-12-16 22:32:27,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653041381] [2021-12-16 22:32:27,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:32:27,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-16 22:32:27,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:32:27,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-16 22:32:27,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-12-16 22:32:27,136 INFO L87 Difference]: Start difference. First operand 619 states and 1088 transitions. Second operand has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-16 22:32:27,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:32:27,372 INFO L93 Difference]: Finished difference Result 904 states and 1522 transitions. [2021-12-16 22:32:27,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-16 22:32:27,373 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 51 [2021-12-16 22:32:27,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:32:27,376 INFO L225 Difference]: With dead ends: 904 [2021-12-16 22:32:27,376 INFO L226 Difference]: Without dead ends: 366 [2021-12-16 22:32:27,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=199, Invalid=793, Unknown=0, NotChecked=0, Total=992 [2021-12-16 22:32:27,379 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 110 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:32:27,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 286 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 22:32:27,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-12-16 22:32:27,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 294. [2021-12-16 22:32:27,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 258 states have (on average 1.310077519379845) internal successors, (338), 267 states have internal predecessors, (338), 20 states have call successors, (20), 7 states have call predecessors, (20), 15 states have return successors, (122), 19 states have call predecessors, (122), 20 states have call successors, (122) [2021-12-16 22:32:27,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 480 transitions. [2021-12-16 22:32:27,416 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 480 transitions. Word has length 51 [2021-12-16 22:32:27,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:32:27,416 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 480 transitions. [2021-12-16 22:32:27,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-16 22:32:27,417 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 480 transitions. [2021-12-16 22:32:27,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-16 22:32:27,419 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:32:27,419 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:32:27,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-16 22:32:27,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-16 22:32:27,635 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:32:27,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:32:27,636 INFO L85 PathProgramCache]: Analyzing trace with hash 287990514, now seen corresponding path program 7 times [2021-12-16 22:32:27,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:32:27,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708218751] [2021-12-16 22:32:27,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:32:27,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:32:27,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:27,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 22:32:27,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:27,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-16 22:32:27,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:27,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-16 22:32:27,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:27,743 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 6 proven. 48 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-16 22:32:27,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:32:27,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708218751] [2021-12-16 22:32:27,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708218751] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:32:27,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538298149] [2021-12-16 22:32:27,744 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-16 22:32:27,744 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:32:27,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:32:27,745 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) [2021-12-16 22:32:27,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-16 22:32:27,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:27,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 22:32:27,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:32:27,910 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 50 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-16 22:32:27,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:32:28,009 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 7 proven. 45 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-16 22:32:28,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538298149] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:32:28,009 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:32:28,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 12 [2021-12-16 22:32:28,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413291877] [2021-12-16 22:32:28,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:32:28,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-16 22:32:28,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:32:28,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-16 22:32:28,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-12-16 22:32:28,011 INFO L87 Difference]: Start difference. First operand 294 states and 480 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 12 states have internal predecessors, (56), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-16 22:32:28,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:32:28,093 INFO L93 Difference]: Finished difference Result 320 states and 510 transitions. [2021-12-16 22:32:28,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-16 22:32:28,093 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 12 states have internal predecessors, (56), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 52 [2021-12-16 22:32:28,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:32:28,095 INFO L225 Difference]: With dead ends: 320 [2021-12-16 22:32:28,095 INFO L226 Difference]: Without dead ends: 266 [2021-12-16 22:32:28,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-12-16 22:32:28,096 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 18 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:32:28,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 134 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 22:32:28,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-12-16 22:32:28,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 234. [2021-12-16 22:32:28,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 204 states have (on average 1.3529411764705883) internal successors, (276), 214 states have internal predecessors, (276), 17 states have call successors, (17), 3 states have call predecessors, (17), 12 states have return successors, (117), 16 states have call predecessors, (117), 17 states have call successors, (117) [2021-12-16 22:32:28,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 410 transitions. [2021-12-16 22:32:28,117 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 410 transitions. Word has length 52 [2021-12-16 22:32:28,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:32:28,118 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 410 transitions. [2021-12-16 22:32:28,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 12 states have internal predecessors, (56), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-16 22:32:28,118 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 410 transitions. [2021-12-16 22:32:28,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-16 22:32:28,120 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:32:28,120 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:32:28,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-16 22:32:28,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-16 22:32:28,347 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:32:28,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:32:28,348 INFO L85 PathProgramCache]: Analyzing trace with hash 820316862, now seen corresponding path program 4 times [2021-12-16 22:32:28,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:32:28,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509391810] [2021-12-16 22:32:28,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:32:28,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:32:28,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:28,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 22:32:28,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:28,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 22:32:28,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:28,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-16 22:32:28,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:28,701 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-12-16 22:32:28,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:32:28,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509391810] [2021-12-16 22:32:28,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509391810] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:32:28,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305693207] [2021-12-16 22:32:28,702 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 22:32:28,702 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:32:28,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:32:28,704 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:32:28,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-16 22:32:28,797 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 22:32:28,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:32:28,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-16 22:32:28,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:32:29,174 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-12-16 22:32:29,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:32:29,568 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-12-16 22:32:29,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305693207] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:32:29,568 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:32:29,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 19 [2021-12-16 22:32:29,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881239983] [2021-12-16 22:32:29,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:32:29,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-16 22:32:29,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:32:29,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-16 22:32:29,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-12-16 22:32:29,570 INFO L87 Difference]: Start difference. First operand 234 states and 410 transitions. Second operand has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 15 states have internal predecessors, (39), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-16 22:32:29,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:32:29,741 INFO L93 Difference]: Finished difference Result 350 states and 678 transitions. [2021-12-16 22:32:29,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-16 22:32:29,742 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 15 states have internal predecessors, (39), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 59 [2021-12-16 22:32:29,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:32:29,745 INFO L225 Difference]: With dead ends: 350 [2021-12-16 22:32:29,745 INFO L226 Difference]: Without dead ends: 346 [2021-12-16 22:32:29,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 107 SyntacticMatches, 18 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-12-16 22:32:29,748 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 32 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 771 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:32:29,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 771 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 22:32:29,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-12-16 22:32:29,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 274. [2021-12-16 22:32:29,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 240 states have (on average 1.3708333333333333) internal successors, (329), 252 states have internal predecessors, (329), 19 states have call successors, (19), 3 states have call predecessors, (19), 14 states have return successors, (153), 18 states have call predecessors, (153), 19 states have call successors, (153) [2021-12-16 22:32:29,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 501 transitions. [2021-12-16 22:32:29,783 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 501 transitions. Word has length 59 [2021-12-16 22:32:29,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:32:29,783 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 501 transitions. [2021-12-16 22:32:29,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 15 states have internal predecessors, (39), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-16 22:32:29,784 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 501 transitions. [2021-12-16 22:32:29,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-16 22:32:29,786 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:32:29,786 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:32:29,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-16 22:32:30,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:32:30,007 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:32:30,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:32:30,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1500375232, now seen corresponding path program 8 times [2021-12-16 22:32:30,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:32:30,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053219415] [2021-12-16 22:32:30,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:32:30,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:32:30,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:30,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 22:32:30,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:30,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 22:32:30,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:30,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-16 22:32:30,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:30,427 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 37 proven. 94 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-16 22:32:30,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:32:30,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053219415] [2021-12-16 22:32:30,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053219415] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:32:30,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540794633] [2021-12-16 22:32:30,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 22:32:30,428 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:32:30,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:32:30,429 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:32:30,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-16 22:32:30,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 22:32:30,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:32:30,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-16 22:32:30,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:32:30,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 22:32:30,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-12-16 22:32:30,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-12-16 22:32:31,157 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 14 proven. 129 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-16 22:32:31,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:32:31,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2021-12-16 22:32:31,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2021-12-16 22:32:31,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-12-16 22:32:31,769 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 10 proven. 130 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-16 22:32:31,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540794633] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:32:31,769 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:32:31,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22, 20] total 48 [2021-12-16 22:32:31,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326707558] [2021-12-16 22:32:31,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:32:31,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-16 22:32:31,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:32:31,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-16 22:32:31,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=2032, Unknown=0, NotChecked=0, Total=2256 [2021-12-16 22:32:31,772 INFO L87 Difference]: Start difference. First operand 274 states and 501 transitions. Second operand has 48 states, 43 states have (on average 2.488372093023256) internal successors, (107), 45 states have internal predecessors, (107), 8 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (9), 6 states have call predecessors, (9), 8 states have call successors, (9) [2021-12-16 22:32:37,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:32:37,776 INFO L93 Difference]: Finished difference Result 1228 states and 2160 transitions. [2021-12-16 22:32:37,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2021-12-16 22:32:37,776 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 43 states have (on average 2.488372093023256) internal successors, (107), 45 states have internal predecessors, (107), 8 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (9), 6 states have call predecessors, (9), 8 states have call successors, (9) Word has length 59 [2021-12-16 22:32:37,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:32:37,784 INFO L225 Difference]: With dead ends: 1228 [2021-12-16 22:32:37,784 INFO L226 Difference]: Without dead ends: 1047 [2021-12-16 22:32:37,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 118 SyntacticMatches, 8 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11124 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=3722, Invalid=27078, Unknown=0, NotChecked=0, Total=30800 [2021-12-16 22:32:37,792 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 349 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 1829 mSolverCounterSat, 296 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 2679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 296 IncrementalHoareTripleChecker+Valid, 1829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 554 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-16 22:32:37,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 639 Invalid, 2679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [296 Valid, 1829 Invalid, 0 Unknown, 554 Unchecked, 1.2s Time] [2021-12-16 22:32:37,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2021-12-16 22:32:37,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 582. [2021-12-16 22:32:37,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 521 states have (on average 1.3877159309021114) internal successors, (723), 544 states have internal predecessors, (723), 29 states have call successors, (29), 9 states have call predecessors, (29), 31 states have return successors, (288), 28 states have call predecessors, (288), 29 states have call successors, (288) [2021-12-16 22:32:37,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 1040 transitions. [2021-12-16 22:32:37,867 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 1040 transitions. Word has length 59 [2021-12-16 22:32:37,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:32:37,868 INFO L470 AbstractCegarLoop]: Abstraction has 582 states and 1040 transitions. [2021-12-16 22:32:37,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 43 states have (on average 2.488372093023256) internal successors, (107), 45 states have internal predecessors, (107), 8 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (9), 6 states have call predecessors, (9), 8 states have call successors, (9) [2021-12-16 22:32:37,868 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 1040 transitions. [2021-12-16 22:32:37,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-16 22:32:37,874 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:32:37,874 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:32:37,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-16 22:32:38,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-16 22:32:38,087 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:32:38,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:32:38,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1078482300, now seen corresponding path program 9 times [2021-12-16 22:32:38,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:32:38,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563867886] [2021-12-16 22:32:38,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:32:38,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:32:38,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:38,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 22:32:38,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:38,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 22:32:38,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:38,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-16 22:32:38,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:38,617 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 49 proven. 90 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-16 22:32:38,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:32:38,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563867886] [2021-12-16 22:32:38,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563867886] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:32:38,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130955592] [2021-12-16 22:32:38,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 22:32:38,617 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:32:38,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:32:38,620 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:32:38,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-16 22:32:38,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-12-16 22:32:38,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:32:38,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-16 22:32:38,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:32:38,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 22:32:39,053 INFO L354 Elim1Store]: treesize reduction 29, result has 39.6 percent of original size [2021-12-16 22:32:39,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 36 [2021-12-16 22:32:39,221 INFO L354 Elim1Store]: treesize reduction 92, result has 20.7 percent of original size [2021-12-16 22:32:39,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 46 [2021-12-16 22:32:39,470 INFO L354 Elim1Store]: treesize reduction 187, result has 7.4 percent of original size [2021-12-16 22:32:39,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 35 [2021-12-16 22:32:56,259 WARN L322 ript$VariableManager]: TermVariabe aux_div_v_arrayElimCell_25_26 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 22:32:56,283 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 89 proven. 46 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-16 22:32:56,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:33:00,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130955592] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:33:00,415 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 22:33:00,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 41 [2021-12-16 22:33:00,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218679828] [2021-12-16 22:33:00,415 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 22:33:00,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-16 22:33:00,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:33:00,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-16 22:33:00,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1569, Unknown=10, NotChecked=0, Total=1722 [2021-12-16 22:33:00,416 INFO L87 Difference]: Start difference. First operand 582 states and 1040 transitions. Second operand has 41 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 40 states have internal predecessors, (79), 5 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-16 22:35:37,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:35:37,425 INFO L93 Difference]: Finished difference Result 1433 states and 2951 transitions. [2021-12-16 22:35:37,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-12-16 22:35:37,425 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 40 states have internal predecessors, (79), 5 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 59 [2021-12-16 22:35:37,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:35:37,434 INFO L225 Difference]: With dead ends: 1433 [2021-12-16 22:35:37,434 INFO L226 Difference]: Without dead ends: 1369 [2021-12-16 22:35:37,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3268 ImplicationChecksByTransitivity, 177.9s TimeCoverageRelationStatistics Valid=880, Invalid=9770, Unknown=62, NotChecked=0, Total=10712 [2021-12-16 22:35:37,439 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 9 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 577 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:35:37,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 286 Invalid, 901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 298 Invalid, 0 Unknown, 577 Unchecked, 0.1s Time] [2021-12-16 22:35:37,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2021-12-16 22:35:37,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 1290. [2021-12-16 22:35:37,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1290 states, 1178 states have (on average 1.3726655348047538) internal successors, (1617), 1214 states have internal predecessors, (1617), 65 states have call successors, (65), 14 states have call predecessors, (65), 46 states have return successors, (776), 61 states have call predecessors, (776), 65 states have call successors, (776) [2021-12-16 22:35:37,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1290 states to 1290 states and 2458 transitions. [2021-12-16 22:35:37,620 INFO L78 Accepts]: Start accepts. Automaton has 1290 states and 2458 transitions. Word has length 59 [2021-12-16 22:35:37,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:35:37,621 INFO L470 AbstractCegarLoop]: Abstraction has 1290 states and 2458 transitions. [2021-12-16 22:35:37,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 40 states have internal predecessors, (79), 5 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-16 22:35:37,621 INFO L276 IsEmpty]: Start isEmpty. Operand 1290 states and 2458 transitions. [2021-12-16 22:35:37,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-16 22:35:37,630 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:35:37,631 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:35:37,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-16 22:35:37,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-16 22:35:37,854 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:35:37,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:35:37,855 INFO L85 PathProgramCache]: Analyzing trace with hash -459546816, now seen corresponding path program 10 times [2021-12-16 22:35:37,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:35:37,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504023498] [2021-12-16 22:35:37,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:35:37,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:35:37,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:35:38,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 22:35:38,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:35:38,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 22:35:38,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:35:38,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-16 22:35:38,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:35:38,418 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 8 proven. 142 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 22:35:38,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:35:38,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504023498] [2021-12-16 22:35:38,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504023498] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:35:38,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350495890] [2021-12-16 22:35:38,419 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 22:35:38,419 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:35:38,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:35:38,420 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:35:38,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-16 22:35:38,484 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 22:35:38,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:35:38,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 59 conjunts are in the unsatisfiable core [2021-12-16 22:35:38,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:35:38,856 INFO L354 Elim1Store]: treesize reduction 78, result has 26.4 percent of original size [2021-12-16 22:35:38,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 44 [2021-12-16 22:35:38,969 INFO L354 Elim1Store]: treesize reduction 99, result has 27.7 percent of original size [2021-12-16 22:35:38,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 53 treesize of output 63 [2021-12-16 22:35:39,160 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-12-16 22:35:39,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-16 22:35:39,584 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 15 proven. 135 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 22:35:39,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:35:54,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 88 [2021-12-16 22:35:54,480 INFO L354 Elim1Store]: treesize reduction 21, result has 46.2 percent of original size [2021-12-16 22:35:54,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1019 treesize of output 985 [2021-12-16 22:35:55,166 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 22:35:55,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 98 [2021-12-16 22:35:55,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2021-12-16 22:35:55,236 INFO L354 Elim1Store]: treesize reduction 51, result has 37.8 percent of original size [2021-12-16 22:35:55,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 2736 treesize of output 2636 [2021-12-16 22:35:57,287 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 23 proven. 124 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-16 22:35:57,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350495890] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:35:57,287 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:35:57,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 25] total 67 [2021-12-16 22:35:57,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946273213] [2021-12-16 22:35:57,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:35:57,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-12-16 22:35:57,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:35:57,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-12-16 22:35:57,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=4067, Unknown=6, NotChecked=0, Total=4422 [2021-12-16 22:35:57,289 INFO L87 Difference]: Start difference. First operand 1290 states and 2458 transitions. Second operand has 67 states, 63 states have (on average 2.0317460317460316) internal successors, (128), 65 states have internal predecessors, (128), 7 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-16 22:36:07,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:36:07,223 INFO L93 Difference]: Finished difference Result 2492 states and 4738 transitions. [2021-12-16 22:36:07,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-12-16 22:36:07,224 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 63 states have (on average 2.0317460317460316) internal successors, (128), 65 states have internal predecessors, (128), 7 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) Word has length 59 [2021-12-16 22:36:07,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:36:07,241 INFO L225 Difference]: With dead ends: 2492 [2021-12-16 22:36:07,241 INFO L226 Difference]: Without dead ends: 2428 [2021-12-16 22:36:07,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 93 SyntacticMatches, 23 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9602 ImplicationChecksByTransitivity, 24.8s TimeCoverageRelationStatistics Valid=2135, Invalid=20811, Unknown=6, NotChecked=0, Total=22952 [2021-12-16 22:36:07,251 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 280 mSDsluCounter, 741 mSDsCounter, 0 mSdLazyCounter, 1225 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 768 SdHoareTripleChecker+Invalid, 2461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 1225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1057 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-16 22:36:07,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 768 Invalid, 2461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 1225 Invalid, 0 Unknown, 1057 Unchecked, 0.8s Time] [2021-12-16 22:36:07,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2428 states. [2021-12-16 22:36:07,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2428 to 2056. [2021-12-16 22:36:07,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2056 states, 1877 states have (on average 1.3287160362280235) internal successors, (2494), 1910 states have internal predecessors, (2494), 114 states have call successors, (114), 34 states have call predecessors, (114), 64 states have return successors, (1282), 111 states have call predecessors, (1282), 114 states have call successors, (1282) [2021-12-16 22:36:07,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2056 states to 2056 states and 3890 transitions. [2021-12-16 22:36:07,551 INFO L78 Accepts]: Start accepts. Automaton has 2056 states and 3890 transitions. Word has length 59 [2021-12-16 22:36:07,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:36:07,552 INFO L470 AbstractCegarLoop]: Abstraction has 2056 states and 3890 transitions. [2021-12-16 22:36:07,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 63 states have (on average 2.0317460317460316) internal successors, (128), 65 states have internal predecessors, (128), 7 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-16 22:36:07,552 INFO L276 IsEmpty]: Start isEmpty. Operand 2056 states and 3890 transitions. [2021-12-16 22:36:07,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-16 22:36:07,569 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:36:07,569 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:36:07,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-16 22:36:07,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-16 22:36:07,783 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:36:07,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:36:07,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1521916736, now seen corresponding path program 11 times [2021-12-16 22:36:07,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:36:07,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856551296] [2021-12-16 22:36:07,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:36:07,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:36:07,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:36:07,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 22:36:07,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:36:07,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 22:36:07,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:36:08,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-16 22:36:08,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:36:08,141 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 12 proven. 123 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-16 22:36:08,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:36:08,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856551296] [2021-12-16 22:36:08,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856551296] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:36:08,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893012231] [2021-12-16 22:36:08,142 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 22:36:08,142 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:36:08,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:36:08,152 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:36:08,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-16 22:36:08,376 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-12-16 22:36:08,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:36:08,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-16 22:36:08,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:36:08,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 22:36:08,680 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-16 22:36:08,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-12-16 22:36:08,721 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-16 22:36:08,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 25 [2021-12-16 22:36:08,780 INFO L354 Elim1Store]: treesize reduction 70, result has 26.3 percent of original size [2021-12-16 22:36:08,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 46 [2021-12-16 22:36:16,825 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 37 proven. 115 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 22:36:16,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:36:35,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893012231] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:36:35,436 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 22:36:35,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 21] total 35 [2021-12-16 22:36:35,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642898642] [2021-12-16 22:36:35,436 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 22:36:35,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-16 22:36:35,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:36:35,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-16 22:36:35,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1770, Unknown=14, NotChecked=0, Total=1980 [2021-12-16 22:36:35,437 INFO L87 Difference]: Start difference. First operand 2056 states and 3890 transitions. Second operand has 35 states, 33 states have (on average 2.787878787878788) internal successors, (92), 33 states have internal predecessors, (92), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-16 22:38:05,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:38:05,839 INFO L93 Difference]: Finished difference Result 6270 states and 13046 transitions. [2021-12-16 22:38:05,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-12-16 22:38:05,840 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 2.787878787878788) internal successors, (92), 33 states have internal predecessors, (92), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) Word has length 59 [2021-12-16 22:38:05,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:38:05,880 INFO L225 Difference]: With dead ends: 6270 [2021-12-16 22:38:05,881 INFO L226 Difference]: Without dead ends: 4319 [2021-12-16 22:38:05,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 83 SyntacticMatches, 3 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3081 ImplicationChecksByTransitivity, 115.9s TimeCoverageRelationStatistics Valid=1299, Invalid=9351, Unknown=62, NotChecked=0, Total=10712 [2021-12-16 22:38:05,913 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 204 mSDsluCounter, 835 mSDsCounter, 0 mSdLazyCounter, 1691 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 896 SdHoareTripleChecker+Invalid, 2563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 1691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 723 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:38:05,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 896 Invalid, 2563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 1691 Invalid, 0 Unknown, 723 Unchecked, 1.0s Time] [2021-12-16 22:38:05,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4319 states. [2021-12-16 22:38:06,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4319 to 3900. [2021-12-16 22:38:06,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3900 states, 3572 states have (on average 1.3012318029115342) internal successors, (4648), 3623 states have internal predecessors, (4648), 209 states have call successors, (209), 88 states have call predecessors, (209), 118 states have return successors, (3216), 188 states have call predecessors, (3216), 209 states have call successors, (3216) [2021-12-16 22:38:06,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3900 states to 3900 states and 8073 transitions. [2021-12-16 22:38:06,537 INFO L78 Accepts]: Start accepts. Automaton has 3900 states and 8073 transitions. Word has length 59 [2021-12-16 22:38:06,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:38:06,537 INFO L470 AbstractCegarLoop]: Abstraction has 3900 states and 8073 transitions. [2021-12-16 22:38:06,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 2.787878787878788) internal successors, (92), 33 states have internal predecessors, (92), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-16 22:38:06,538 INFO L276 IsEmpty]: Start isEmpty. Operand 3900 states and 8073 transitions. [2021-12-16 22:38:06,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-16 22:38:06,558 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:38:06,558 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 6, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:38:06,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-16 22:38:06,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:38:06,772 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:38:06,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:38:06,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1426993792, now seen corresponding path program 12 times [2021-12-16 22:38:06,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:38:06,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665751314] [2021-12-16 22:38:06,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:38:06,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:38:06,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:38:06,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 22:38:06,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:38:06,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 22:38:06,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:38:06,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-16 22:38:07,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:38:07,060 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 2 proven. 106 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-12-16 22:38:07,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:38:07,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665751314] [2021-12-16 22:38:07,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665751314] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:38:07,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789531990] [2021-12-16 22:38:07,061 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 22:38:07,062 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:38:07,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:38:07,063 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:38:07,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-16 22:38:07,265 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-12-16 22:38:07,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:38:07,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-16 22:38:07,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:38:07,595 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-16 22:38:07,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:38:07,897 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-16 22:38:07,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789531990] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:38:07,897 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:38:07,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 20 [2021-12-16 22:38:07,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862093904] [2021-12-16 22:38:07,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:38:07,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-16 22:38:07,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:38:07,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-16 22:38:07,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-12-16 22:38:07,899 INFO L87 Difference]: Start difference. First operand 3900 states and 8073 transitions. Second operand has 20 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 15 states have internal predecessors, (49), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-16 22:38:08,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:38:08,377 INFO L93 Difference]: Finished difference Result 4565 states and 10834 transitions. [2021-12-16 22:38:08,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-16 22:38:08,378 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 15 states have internal predecessors, (49), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 59 [2021-12-16 22:38:08,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:38:08,427 INFO L225 Difference]: With dead ends: 4565 [2021-12-16 22:38:08,427 INFO L226 Difference]: Without dead ends: 4561 [2021-12-16 22:38:08,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 109 SyntacticMatches, 15 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-12-16 22:38:08,442 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 28 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:38:08,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 647 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 22:38:08,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4561 states. [2021-12-16 22:38:09,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4561 to 4088. [2021-12-16 22:38:09,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4088 states, 3737 states have (on average 1.3042547497993042) internal successors, (4874), 3802 states have internal predecessors, (4874), 224 states have call successors, (224), 88 states have call predecessors, (224), 126 states have return successors, (3700), 197 states have call predecessors, (3700), 224 states have call successors, (3700) [2021-12-16 22:38:09,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4088 states to 4088 states and 8798 transitions. [2021-12-16 22:38:09,200 INFO L78 Accepts]: Start accepts. Automaton has 4088 states and 8798 transitions. Word has length 59 [2021-12-16 22:38:09,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:38:09,200 INFO L470 AbstractCegarLoop]: Abstraction has 4088 states and 8798 transitions. [2021-12-16 22:38:09,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 15 states have internal predecessors, (49), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-16 22:38:09,201 INFO L276 IsEmpty]: Start isEmpty. Operand 4088 states and 8798 transitions. [2021-12-16 22:38:09,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-16 22:38:09,219 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:38:09,219 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 7, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:38:09,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-16 22:38:09,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:38:09,420 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:38:09,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:38:09,420 INFO L85 PathProgramCache]: Analyzing trace with hash 998768126, now seen corresponding path program 13 times [2021-12-16 22:38:09,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:38:09,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151031531] [2021-12-16 22:38:09,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:38:09,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:38:09,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:38:09,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 22:38:09,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:38:09,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 22:38:09,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:38:09,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-16 22:38:09,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:38:09,936 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 37 proven. 98 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-16 22:38:09,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:38:09,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151031531] [2021-12-16 22:38:09,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151031531] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:38:09,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265022191] [2021-12-16 22:38:09,937 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-16 22:38:09,937 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:38:09,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:38:09,940 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:38:09,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-16 22:38:10,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:38:10,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-16 22:38:10,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:38:10,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 22:38:10,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-12-16 22:38:10,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-12-16 22:38:10,708 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 14 proven. 129 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-16 22:38:10,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:38:10,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-16 22:38:10,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2021-12-16 22:38:11,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-16 22:38:11,350 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 10 proven. 130 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-16 22:38:11,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265022191] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:38:11,351 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:38:11,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22, 20] total 51 [2021-12-16 22:38:11,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55816130] [2021-12-16 22:38:11,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:38:11,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-16 22:38:11,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:38:11,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-16 22:38:11,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=2323, Unknown=0, NotChecked=0, Total=2550 [2021-12-16 22:38:11,352 INFO L87 Difference]: Start difference. First operand 4088 states and 8798 transitions. Second operand has 51 states, 46 states have (on average 2.4782608695652173) internal successors, (114), 47 states have internal predecessors, (114), 8 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2021-12-16 22:38:18,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:38:18,163 INFO L93 Difference]: Finished difference Result 7026 states and 14071 transitions. [2021-12-16 22:38:18,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2021-12-16 22:38:18,164 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 46 states have (on average 2.4782608695652173) internal successors, (114), 47 states have internal predecessors, (114), 8 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) Word has length 59 [2021-12-16 22:38:18,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:38:18,212 INFO L225 Difference]: With dead ends: 7026 [2021-12-16 22:38:18,213 INFO L226 Difference]: Without dead ends: 4725 [2021-12-16 22:38:18,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 93 SyntacticMatches, 7 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10405 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=2602, Invalid=26468, Unknown=0, NotChecked=0, Total=29070 [2021-12-16 22:38:18,236 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 340 mSDsluCounter, 1004 mSDsCounter, 0 mSdLazyCounter, 3468 mSolverCounterSat, 324 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 1054 SdHoareTripleChecker+Invalid, 4406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 324 IncrementalHoareTripleChecker+Valid, 3468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 614 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:38:18,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [354 Valid, 1054 Invalid, 4406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [324 Valid, 3468 Invalid, 0 Unknown, 614 Unchecked, 2.0s Time] [2021-12-16 22:38:18,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4725 states. [2021-12-16 22:38:18,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4725 to 4113. [2021-12-16 22:38:18,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4113 states, 3755 states have (on average 1.292676431424767) internal successors, (4854), 3824 states have internal predecessors, (4854), 226 states have call successors, (226), 91 states have call predecessors, (226), 131 states have return successors, (3238), 197 states have call predecessors, (3238), 226 states have call successors, (3238) [2021-12-16 22:38:18,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4113 states to 4113 states and 8318 transitions. [2021-12-16 22:38:18,875 INFO L78 Accepts]: Start accepts. Automaton has 4113 states and 8318 transitions. Word has length 59 [2021-12-16 22:38:18,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:38:18,875 INFO L470 AbstractCegarLoop]: Abstraction has 4113 states and 8318 transitions. [2021-12-16 22:38:18,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 46 states have (on average 2.4782608695652173) internal successors, (114), 47 states have internal predecessors, (114), 8 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2021-12-16 22:38:18,876 INFO L276 IsEmpty]: Start isEmpty. Operand 4113 states and 8318 transitions. [2021-12-16 22:38:18,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-16 22:38:18,887 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:38:18,887 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 6, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:38:18,903 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-12-16 22:38:19,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-12-16 22:38:19,088 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:38:19,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:38:19,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1678826496, now seen corresponding path program 14 times [2021-12-16 22:38:19,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:38:19,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286074384] [2021-12-16 22:38:19,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:38:19,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:38:19,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:38:19,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 22:38:19,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:38:19,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 22:38:19,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:38:19,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-16 22:38:19,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:38:19,423 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 2 proven. 108 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-16 22:38:19,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:38:19,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286074384] [2021-12-16 22:38:19,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286074384] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:38:19,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781170015] [2021-12-16 22:38:19,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 22:38:19,424 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:38:19,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:38:19,428 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:38:19,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-16 22:38:19,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 22:38:19,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:38:19,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-16 22:38:19,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:38:19,832 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-12-16 22:38:19,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:38:20,170 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-12-16 22:38:20,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781170015] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:38:20,171 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:38:20,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 20 [2021-12-16 22:38:20,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787161348] [2021-12-16 22:38:20,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:38:20,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-16 22:38:20,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:38:20,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-16 22:38:20,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-12-16 22:38:20,172 INFO L87 Difference]: Start difference. First operand 4113 states and 8318 transitions. Second operand has 20 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 16 states have internal predecessors, (54), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-16 22:38:20,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:38:20,779 INFO L93 Difference]: Finished difference Result 6193 states and 17578 transitions. [2021-12-16 22:38:20,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-16 22:38:20,781 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 16 states have internal predecessors, (54), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 59 [2021-12-16 22:38:20,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:38:20,833 INFO L225 Difference]: With dead ends: 6193 [2021-12-16 22:38:20,833 INFO L226 Difference]: Without dead ends: 6189 [2021-12-16 22:38:20,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 107 SyntacticMatches, 17 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-12-16 22:38:20,851 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 35 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 670 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:38:20,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 670 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 22:38:20,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6189 states. [2021-12-16 22:38:22,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6189 to 5364. [2021-12-16 22:38:22,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5364 states, 4915 states have (on average 1.323702950152594) internal successors, (6506), 5031 states have internal predecessors, (6506), 278 states have call successors, (278), 91 states have call predecessors, (278), 170 states have return successors, (4850), 241 states have call predecessors, (4850), 278 states have call successors, (4850) [2021-12-16 22:38:22,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5364 states to 5364 states and 11634 transitions. [2021-12-16 22:38:22,290 INFO L78 Accepts]: Start accepts. Automaton has 5364 states and 11634 transitions. Word has length 59 [2021-12-16 22:38:22,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:38:22,290 INFO L470 AbstractCegarLoop]: Abstraction has 5364 states and 11634 transitions. [2021-12-16 22:38:22,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 16 states have internal predecessors, (54), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-16 22:38:22,291 INFO L276 IsEmpty]: Start isEmpty. Operand 5364 states and 11634 transitions. [2021-12-16 22:38:22,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-16 22:38:22,304 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:38:22,305 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 5, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:38:22,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-16 22:38:22,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-16 22:38:22,518 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:38:22,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:38:22,518 INFO L85 PathProgramCache]: Analyzing trace with hash 2027337988, now seen corresponding path program 15 times [2021-12-16 22:38:22,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:38:22,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378601013] [2021-12-16 22:38:22,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:38:22,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:38:22,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:38:22,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 22:38:22,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:38:22,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 22:38:22,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:38:22,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-16 22:38:22,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:38:23,169 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 43 proven. 96 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-16 22:38:23,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:38:23,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378601013] [2021-12-16 22:38:23,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378601013] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:38:23,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736123190] [2021-12-16 22:38:23,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 22:38:23,170 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:38:23,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:38:23,171 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:38:23,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-16 22:38:23,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-12-16 22:38:23,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:38:23,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-16 22:38:23,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:38:23,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 22:38:23,569 INFO L354 Elim1Store]: treesize reduction 29, result has 39.6 percent of original size [2021-12-16 22:38:23,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 37 [2021-12-16 22:38:23,806 INFO L354 Elim1Store]: treesize reduction 92, result has 20.7 percent of original size [2021-12-16 22:38:23,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 56 [2021-12-16 22:38:24,018 INFO L354 Elim1Store]: treesize reduction 187, result has 7.4 percent of original size [2021-12-16 22:38:24,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 68 treesize of output 45 [2021-12-16 22:38:43,732 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 89 proven. 46 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-16 22:38:43,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:38:43,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736123190] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:38:43,840 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 22:38:43,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 41 [2021-12-16 22:38:43,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759861405] [2021-12-16 22:38:43,840 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 22:38:43,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-16 22:38:43,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:38:43,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-16 22:38:43,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1577, Unknown=10, NotChecked=0, Total=1722 [2021-12-16 22:38:43,841 INFO L87 Difference]: Start difference. First operand 5364 states and 11634 transitions. Second operand has 41 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 40 states have internal predecessors, (81), 5 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-16 22:41:40,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:41:40,772 INFO L93 Difference]: Finished difference Result 6193 states and 13931 transitions. [2021-12-16 22:41:40,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-12-16 22:41:40,772 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 40 states have internal predecessors, (81), 5 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 59 [2021-12-16 22:41:40,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:41:40,836 INFO L225 Difference]: With dead ends: 6193 [2021-12-16 22:41:40,836 INFO L226 Difference]: Without dead ends: 6138 [2021-12-16 22:41:40,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 4324 ImplicationChecksByTransitivity, 196.2s TimeCoverageRelationStatistics Valid=1077, Invalid=11958, Unknown=75, NotChecked=0, Total=13110 [2021-12-16 22:41:40,859 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 59 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 1670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1063 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 22:41:40,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 349 Invalid, 1670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 567 Invalid, 0 Unknown, 1063 Unchecked, 0.3s Time] [2021-12-16 22:41:40,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6138 states. [2021-12-16 22:41:41,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6138 to 5503. [2021-12-16 22:41:41,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5503 states, 5057 states have (on average 1.326478149100257) internal successors, (6708), 5172 states have internal predecessors, (6708), 266 states have call successors, (266), 89 states have call predecessors, (266), 179 states have return successors, (4381), 241 states have call predecessors, (4381), 266 states have call successors, (4381) [2021-12-16 22:41:41,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5503 states to 5503 states and 11355 transitions. [2021-12-16 22:41:41,973 INFO L78 Accepts]: Start accepts. Automaton has 5503 states and 11355 transitions. Word has length 59 [2021-12-16 22:41:41,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:41:41,973 INFO L470 AbstractCegarLoop]: Abstraction has 5503 states and 11355 transitions. [2021-12-16 22:41:41,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 40 states have internal predecessors, (81), 5 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-16 22:41:41,973 INFO L276 IsEmpty]: Start isEmpty. Operand 5503 states and 11355 transitions. [2021-12-16 22:41:41,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-16 22:41:41,989 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:41:41,989 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 6, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:41:42,006 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-12-16 22:41:42,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:41:42,195 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:41:42,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:41:42,196 INFO L85 PathProgramCache]: Analyzing trace with hash -2009463870, now seen corresponding path program 16 times [2021-12-16 22:41:42,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:41:42,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794504887] [2021-12-16 22:41:42,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:41:42,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:41:42,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:41:42,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 22:41:42,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:41:42,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 22:41:42,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:41:42,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-16 22:41:42,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:41:42,410 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-16 22:41:42,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:41:42,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794504887] [2021-12-16 22:41:42,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794504887] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:41:42,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107084184] [2021-12-16 22:41:42,411 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 22:41:42,411 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:41:42,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:41:42,416 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:41:42,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-16 22:41:42,659 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 22:41:42,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:41:42,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-16 22:41:42,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:41:43,021 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-16 22:41:43,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:41:43,412 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 2 proven. 94 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-12-16 22:41:43,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107084184] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:41:43,412 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:41:43,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 14] total 23 [2021-12-16 22:41:43,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468824812] [2021-12-16 22:41:43,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:41:43,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-16 22:41:43,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:41:43,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-16 22:41:43,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-12-16 22:41:43,413 INFO L87 Difference]: Start difference. First operand 5503 states and 11355 transitions. Second operand has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 16 states have internal predecessors, (49), 3 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-16 22:41:44,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:41:44,067 INFO L93 Difference]: Finished difference Result 6157 states and 14384 transitions. [2021-12-16 22:41:44,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-16 22:41:44,068 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 16 states have internal predecessors, (49), 3 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) Word has length 59 [2021-12-16 22:41:44,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:41:44,148 INFO L225 Difference]: With dead ends: 6157 [2021-12-16 22:41:44,149 INFO L226 Difference]: Without dead ends: 6153 [2021-12-16 22:41:44,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 108 SyntacticMatches, 13 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-12-16 22:41:44,176 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 23 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 790 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:41:44,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 790 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 22:41:44,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6153 states. [2021-12-16 22:41:45,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6153 to 5709. [2021-12-16 22:41:45,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5709 states, 5236 states have (on average 1.3262032085561497) internal successors, (6944), 5365 states have internal predecessors, (6944), 281 states have call successors, (281), 89 states have call predecessors, (281), 191 states have return successors, (5109), 254 states have call predecessors, (5109), 281 states have call successors, (5109) [2021-12-16 22:41:45,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5709 states to 5709 states and 12334 transitions. [2021-12-16 22:41:45,298 INFO L78 Accepts]: Start accepts. Automaton has 5709 states and 12334 transitions. Word has length 59 [2021-12-16 22:41:45,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:41:45,298 INFO L470 AbstractCegarLoop]: Abstraction has 5709 states and 12334 transitions. [2021-12-16 22:41:45,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 16 states have internal predecessors, (49), 3 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-16 22:41:45,299 INFO L276 IsEmpty]: Start isEmpty. Operand 5709 states and 12334 transitions. [2021-12-16 22:41:45,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-16 22:41:45,317 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:41:45,318 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 5, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:41:45,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-16 22:41:45,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:41:45,531 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:41:45,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:41:45,532 INFO L85 PathProgramCache]: Analyzing trace with hash -920039548, now seen corresponding path program 17 times [2021-12-16 22:41:45,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:41:45,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577882348] [2021-12-16 22:41:45,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:41:45,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:41:45,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:41:45,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 22:41:45,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:41:45,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 22:41:45,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:41:45,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-16 22:41:45,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:41:45,818 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 2 proven. 131 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-16 22:41:45,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:41:45,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577882348] [2021-12-16 22:41:45,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577882348] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:41:45,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958022621] [2021-12-16 22:41:45,819 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 22:41:45,819 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:41:45,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:41:45,820 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:41:45,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-16 22:41:45,994 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-12-16 22:41:45,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:41:45,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-16 22:41:45,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:41:46,144 INFO L354 Elim1Store]: treesize reduction 31, result has 18.4 percent of original size [2021-12-16 22:41:46,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 28 [2021-12-16 22:41:46,365 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 78 proven. 51 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-16 22:41:46,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:41:46,619 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-12-16 22:41:46,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 31 [2021-12-16 22:41:46,673 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 6 proven. 120 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-16 22:41:46,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958022621] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:41:46,674 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:41:46,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 11] total 27 [2021-12-16 22:41:46,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784446178] [2021-12-16 22:41:46,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:41:46,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-16 22:41:46,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:41:46,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-16 22:41:46,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2021-12-16 22:41:46,676 INFO L87 Difference]: Start difference. First operand 5709 states and 12334 transitions. Second operand has 27 states, 24 states have (on average 3.2916666666666665) internal successors, (79), 24 states have internal predecessors, (79), 5 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2021-12-16 22:41:47,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:41:47,572 INFO L93 Difference]: Finished difference Result 8269 states and 16504 transitions. [2021-12-16 22:41:47,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-16 22:41:47,572 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 3.2916666666666665) internal successors, (79), 24 states have internal predecessors, (79), 5 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) Word has length 59 [2021-12-16 22:41:47,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:41:47,620 INFO L225 Difference]: With dead ends: 8269 [2021-12-16 22:41:47,620 INFO L226 Difference]: Without dead ends: 5358 [2021-12-16 22:41:47,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 108 SyntacticMatches, 8 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=228, Invalid=1104, Unknown=0, NotChecked=0, Total=1332 [2021-12-16 22:41:47,651 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 72 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 208 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 22:41:47,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 248 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 224 Invalid, 0 Unknown, 208 Unchecked, 0.2s Time] [2021-12-16 22:41:47,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5358 states. [2021-12-16 22:41:48,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5358 to 5270. [2021-12-16 22:41:48,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5270 states, 4846 states have (on average 1.336772595955427) internal successors, (6478), 4975 states have internal predecessors, (6478), 238 states have call successors, (238), 80 states have call predecessors, (238), 185 states have return successors, (3737), 214 states have call predecessors, (3737), 238 states have call successors, (3737) [2021-12-16 22:41:48,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5270 states to 5270 states and 10453 transitions. [2021-12-16 22:41:48,833 INFO L78 Accepts]: Start accepts. Automaton has 5270 states and 10453 transitions. Word has length 59 [2021-12-16 22:41:48,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:41:48,833 INFO L470 AbstractCegarLoop]: Abstraction has 5270 states and 10453 transitions. [2021-12-16 22:41:48,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 3.2916666666666665) internal successors, (79), 24 states have internal predecessors, (79), 5 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2021-12-16 22:41:48,833 INFO L276 IsEmpty]: Start isEmpty. Operand 5270 states and 10453 transitions. [2021-12-16 22:41:48,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-16 22:41:48,848 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:41:48,848 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 6, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:41:48,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-12-16 22:41:49,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-16 22:41:49,071 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:41:49,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:41:49,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1652952510, now seen corresponding path program 18 times [2021-12-16 22:41:49,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:41:49,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642442748] [2021-12-16 22:41:49,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:41:49,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:41:49,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:41:49,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 22:41:49,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:41:49,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 22:41:49,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:41:49,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-16 22:41:49,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:41:49,315 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-12-16 22:41:49,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:41:49,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642442748] [2021-12-16 22:41:49,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642442748] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:41:49,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284523189] [2021-12-16 22:41:49,316 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 22:41:49,316 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:41:49,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:41:49,318 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:41:49,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-16 22:41:49,562 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-12-16 22:41:49,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:41:49,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-16 22:41:49,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:41:49,948 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-12-16 22:41:49,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:41:50,306 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 4 proven. 96 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-16 22:41:50,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284523189] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:41:50,307 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:41:50,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 14] total 21 [2021-12-16 22:41:50,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689649177] [2021-12-16 22:41:50,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:41:50,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-16 22:41:50,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:41:50,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-16 22:41:50,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-12-16 22:41:50,308 INFO L87 Difference]: Start difference. First operand 5270 states and 10453 transitions. Second operand has 21 states, 20 states have (on average 2.6) internal successors, (52), 16 states have internal predecessors, (52), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-16 22:41:51,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:41:51,081 INFO L93 Difference]: Finished difference Result 7074 states and 17826 transitions. [2021-12-16 22:41:51,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-16 22:41:51,082 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.6) internal successors, (52), 16 states have internal predecessors, (52), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 59 [2021-12-16 22:41:51,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:41:51,164 INFO L225 Difference]: With dead ends: 7074 [2021-12-16 22:41:51,165 INFO L226 Difference]: Without dead ends: 7070 [2021-12-16 22:41:51,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 107 SyntacticMatches, 16 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-12-16 22:41:51,193 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 28 mSDsluCounter, 917 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 984 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:41:51,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 984 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 22:41:51,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7070 states. [2021-12-16 22:41:52,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7070 to 6177. [2021-12-16 22:41:52,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6177 states, 5699 states have (on average 1.3493595367608353) internal successors, (7690), 5842 states have internal predecessors, (7690), 278 states have call successors, (278), 80 states have call predecessors, (278), 199 states have return successors, (4558), 254 states have call predecessors, (4558), 278 states have call successors, (4558) [2021-12-16 22:41:52,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6177 states to 6177 states and 12526 transitions. [2021-12-16 22:41:52,659 INFO L78 Accepts]: Start accepts. Automaton has 6177 states and 12526 transitions. Word has length 59 [2021-12-16 22:41:52,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:41:52,660 INFO L470 AbstractCegarLoop]: Abstraction has 6177 states and 12526 transitions. [2021-12-16 22:41:52,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.6) internal successors, (52), 16 states have internal predecessors, (52), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-16 22:41:52,660 INFO L276 IsEmpty]: Start isEmpty. Operand 6177 states and 12526 transitions. [2021-12-16 22:41:52,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-16 22:41:52,678 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:41:52,678 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:41:52,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-12-16 22:41:52,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-16 22:41:52,902 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:41:52,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:41:52,903 INFO L85 PathProgramCache]: Analyzing trace with hash -794442876, now seen corresponding path program 2 times [2021-12-16 22:41:52,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:41:52,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156007564] [2021-12-16 22:41:52,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:41:52,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:41:52,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:41:52,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 22:41:53,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:41:53,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 22:41:53,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:41:53,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-16 22:41:53,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:41:53,174 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-12-16 22:41:53,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:41:53,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156007564] [2021-12-16 22:41:53,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156007564] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:41:53,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875940412] [2021-12-16 22:41:53,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 22:41:53,175 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:41:53,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:41:53,176 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:41:53,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-16 22:41:53,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 22:41:53,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:41:53,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-16 22:41:53,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:41:53,945 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-12-16 22:41:53,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:41:54,333 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-12-16 22:41:54,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875940412] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:41:54,334 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:41:54,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 19 [2021-12-16 22:41:54,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59311374] [2021-12-16 22:41:54,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:41:54,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-16 22:41:54,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:41:54,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-16 22:41:54,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-12-16 22:41:54,335 INFO L87 Difference]: Start difference. First operand 6177 states and 12526 transitions. Second operand has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 15 states have internal predecessors, (39), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-16 22:41:55,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:41:55,078 INFO L93 Difference]: Finished difference Result 7225 states and 17439 transitions. [2021-12-16 22:41:55,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-16 22:41:55,078 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 15 states have internal predecessors, (39), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 59 [2021-12-16 22:41:55,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:41:55,192 INFO L225 Difference]: With dead ends: 7225 [2021-12-16 22:41:55,193 INFO L226 Difference]: Without dead ends: 7221 [2021-12-16 22:41:55,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 107 SyntacticMatches, 18 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-12-16 22:41:55,207 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 35 mSDsluCounter, 756 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 829 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:41:55,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 829 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 22:41:55,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7221 states. [2021-12-16 22:41:56,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7221 to 6633. [2021-12-16 22:41:56,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6633 states, 6131 states have (on average 1.359810797586038) internal successors, (8337), 6292 states have internal predecessors, (8337), 288 states have call successors, (288), 80 states have call predecessors, (288), 213 states have return successors, (5350), 260 states have call predecessors, (5350), 288 states have call successors, (5350) [2021-12-16 22:41:56,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6633 states to 6633 states and 13975 transitions. [2021-12-16 22:41:56,393 INFO L78 Accepts]: Start accepts. Automaton has 6633 states and 13975 transitions. Word has length 59 [2021-12-16 22:41:56,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:41:56,393 INFO L470 AbstractCegarLoop]: Abstraction has 6633 states and 13975 transitions. [2021-12-16 22:41:56,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 15 states have internal predecessors, (39), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-16 22:41:56,393 INFO L276 IsEmpty]: Start isEmpty. Operand 6633 states and 13975 transitions. [2021-12-16 22:41:56,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-16 22:41:56,413 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:41:56,413 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 5, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:41:56,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-12-16 22:41:56,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-16 22:41:56,614 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:41:56,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:41:56,614 INFO L85 PathProgramCache]: Analyzing trace with hash -898397088, now seen corresponding path program 19 times [2021-12-16 22:41:56,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:41:56,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233948601] [2021-12-16 22:41:56,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:41:56,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:41:56,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:41:56,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 22:41:56,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:41:56,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 22:41:56,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:41:56,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-16 22:41:56,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:41:56,695 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-16 22:41:56,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:41:56,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233948601] [2021-12-16 22:41:56,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233948601] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:41:56,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8404458] [2021-12-16 22:41:56,696 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-16 22:41:56,696 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:41:56,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:41:56,700 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:41:56,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-16 22:41:56,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:41:56,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-16 22:41:56,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:41:56,916 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 86 proven. 46 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-16 22:41:56,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:41:57,019 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 9 proven. 86 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-16 22:41:57,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8404458] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:41:57,019 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:41:57,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 14 [2021-12-16 22:41:57,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028186722] [2021-12-16 22:41:57,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:41:57,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-16 22:41:57,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:41:57,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-16 22:41:57,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-12-16 22:41:57,021 INFO L87 Difference]: Start difference. First operand 6633 states and 13975 transitions. Second operand has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-16 22:41:57,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:41:57,652 INFO L93 Difference]: Finished difference Result 8674 states and 16834 transitions. [2021-12-16 22:41:57,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-16 22:41:57,653 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 61 [2021-12-16 22:41:57,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:41:57,693 INFO L225 Difference]: With dead ends: 8674 [2021-12-16 22:41:57,693 INFO L226 Difference]: Without dead ends: 6356 [2021-12-16 22:41:57,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-12-16 22:41:57,714 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 61 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:41:57,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 103 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 22:41:57,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6356 states. [2021-12-16 22:41:58,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6356 to 5924. [2021-12-16 22:41:58,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5924 states, 5483 states have (on average 1.3474375341966076) internal successors, (7388), 5605 states have internal predecessors, (7388), 240 states have call successors, (240), 69 states have call predecessors, (240), 200 states have return successors, (4390), 249 states have call predecessors, (4390), 240 states have call successors, (4390) [2021-12-16 22:41:58,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5924 states to 5924 states and 12018 transitions. [2021-12-16 22:41:58,497 INFO L78 Accepts]: Start accepts. Automaton has 5924 states and 12018 transitions. Word has length 61 [2021-12-16 22:41:58,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:41:58,497 INFO L470 AbstractCegarLoop]: Abstraction has 5924 states and 12018 transitions. [2021-12-16 22:41:58,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-16 22:41:58,497 INFO L276 IsEmpty]: Start isEmpty. Operand 5924 states and 12018 transitions. [2021-12-16 22:41:58,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-16 22:41:58,513 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:41:58,513 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:41:58,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-12-16 22:41:58,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-16 22:41:58,714 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:41:58,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:41:58,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1246342810, now seen corresponding path program 5 times [2021-12-16 22:41:58,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:41:58,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099649421] [2021-12-16 22:41:58,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:41:58,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:41:58,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:41:58,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 22:41:58,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:41:58,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 22:41:58,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:41:58,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-16 22:41:58,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:41:58,810 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 59 proven. 106 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-16 22:41:58,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:41:58,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099649421] [2021-12-16 22:41:58,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099649421] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:41:58,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808800369] [2021-12-16 22:41:58,811 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 22:41:58,811 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:41:58,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:41:58,816 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:41:58,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-16 22:41:59,173 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-12-16 22:41:59,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:41:59,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-16 22:41:59,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:41:59,350 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 84 proven. 80 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-16 22:41:59,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:41:59,556 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 69 proven. 96 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-16 22:41:59,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808800369] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:41:59,556 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:41:59,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12] total 20 [2021-12-16 22:41:59,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129660311] [2021-12-16 22:41:59,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:41:59,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-16 22:41:59,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:41:59,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-16 22:41:59,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2021-12-16 22:41:59,558 INFO L87 Difference]: Start difference. First operand 5924 states and 12018 transitions. Second operand has 20 states, 20 states have (on average 4.0) internal successors, (80), 20 states have internal predecessors, (80), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 22:42:00,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:42:00,097 INFO L93 Difference]: Finished difference Result 6252 states and 12418 transitions. [2021-12-16 22:42:00,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-16 22:42:00,098 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.0) internal successors, (80), 20 states have internal predecessors, (80), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 62 [2021-12-16 22:42:00,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:42:00,124 INFO L225 Difference]: With dead ends: 6252 [2021-12-16 22:42:00,125 INFO L226 Difference]: Without dead ends: 3725 [2021-12-16 22:42:00,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 131 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2021-12-16 22:42:00,140 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 98 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:42:00,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 254 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 22:42:00,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3725 states. [2021-12-16 22:42:01,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3725 to 3355. [2021-12-16 22:42:01,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3355 states, 3103 states have (on average 1.3480502739284563) internal successors, (4183), 3144 states have internal predecessors, (4183), 143 states have call successors, (143), 29 states have call predecessors, (143), 108 states have return successors, (3550), 181 states have call predecessors, (3550), 143 states have call successors, (3550) [2021-12-16 22:42:01,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3355 states to 3355 states and 7876 transitions. [2021-12-16 22:42:01,109 INFO L78 Accepts]: Start accepts. Automaton has 3355 states and 7876 transitions. Word has length 62 [2021-12-16 22:42:01,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:42:01,109 INFO L470 AbstractCegarLoop]: Abstraction has 3355 states and 7876 transitions. [2021-12-16 22:42:01,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.0) internal successors, (80), 20 states have internal predecessors, (80), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 22:42:01,110 INFO L276 IsEmpty]: Start isEmpty. Operand 3355 states and 7876 transitions. [2021-12-16 22:42:01,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-16 22:42:01,123 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:42:01,124 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:42:01,139 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-12-16 22:42:01,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-16 22:42:01,324 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:42:01,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:42:01,325 INFO L85 PathProgramCache]: Analyzing trace with hash 355115088, now seen corresponding path program 6 times [2021-12-16 22:42:01,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:42:01,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041793980] [2021-12-16 22:42:01,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:42:01,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:42:01,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:42:01,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 22:42:01,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:42:01,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-16 22:42:01,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:42:01,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-16 22:42:01,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:42:01,409 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 12 proven. 134 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-12-16 22:42:01,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:42:01,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041793980] [2021-12-16 22:42:01,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041793980] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:42:01,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375692965] [2021-12-16 22:42:01,410 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 22:42:01,410 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:42:01,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:42:01,412 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:42:01,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-16 22:42:01,582 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-12-16 22:42:01,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:42:01,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-16 22:42:01,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:42:01,789 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 144 proven. 4 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-12-16 22:42:01,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:42:01,981 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 142 proven. 4 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-12-16 22:42:01,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375692965] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:42:01,982 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:42:01,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11] total 22 [2021-12-16 22:42:01,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122873895] [2021-12-16 22:42:01,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:42:01,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-16 22:42:01,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:42:01,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-16 22:42:01,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2021-12-16 22:42:01,983 INFO L87 Difference]: Start difference. First operand 3355 states and 7876 transitions. Second operand has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 22 states have internal predecessors, (72), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-16 22:42:02,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:42:02,343 INFO L93 Difference]: Finished difference Result 4739 states and 9795 transitions. [2021-12-16 22:42:02,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-16 22:42:02,344 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 22 states have internal predecessors, (72), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 68 [2021-12-16 22:42:02,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:42:02,357 INFO L225 Difference]: With dead ends: 4739 [2021-12-16 22:42:02,358 INFO L226 Difference]: Without dead ends: 2966 [2021-12-16 22:42:02,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2021-12-16 22:42:02,366 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 42 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:42:02,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 190 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 22:42:02,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2966 states. [2021-12-16 22:42:02,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2966 to 2228. [2021-12-16 22:42:02,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2228 states, 2072 states have (on average 1.3923745173745175) internal successors, (2885), 2150 states have internal predecessors, (2885), 62 states have call successors, (62), 18 states have call predecessors, (62), 93 states have return successors, (2349), 59 states have call predecessors, (2349), 62 states have call successors, (2349) [2021-12-16 22:42:02,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2228 states to 2228 states and 5296 transitions. [2021-12-16 22:42:02,886 INFO L78 Accepts]: Start accepts. Automaton has 2228 states and 5296 transitions. Word has length 68 [2021-12-16 22:42:02,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:42:02,887 INFO L470 AbstractCegarLoop]: Abstraction has 2228 states and 5296 transitions. [2021-12-16 22:42:02,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 22 states have internal predecessors, (72), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-16 22:42:02,887 INFO L276 IsEmpty]: Start isEmpty. Operand 2228 states and 5296 transitions. [2021-12-16 22:42:02,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-16 22:42:02,894 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:42:02,894 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:42:02,910 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-12-16 22:42:03,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:42:03,095 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:42:03,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:42:03,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1254578670, now seen corresponding path program 7 times [2021-12-16 22:42:03,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:42:03,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634299320] [2021-12-16 22:42:03,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:42:03,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:42:03,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:42:03,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 22:42:03,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:42:03,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-16 22:42:03,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:42:03,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-16 22:42:03,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:42:03,447 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 3 proven. 201 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-16 22:42:03,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:42:03,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634299320] [2021-12-16 22:42:03,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634299320] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:42:03,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943732152] [2021-12-16 22:42:03,448 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-16 22:42:03,448 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:42:03,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:42:03,449 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:42:03,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-12-16 22:42:03,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:42:03,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-16 22:42:03,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:42:03,937 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-16 22:42:03,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:42:04,373 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-16 22:42:04,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943732152] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:42:04,374 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:42:04,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 22 [2021-12-16 22:42:04,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284462549] [2021-12-16 22:42:04,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:42:04,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-16 22:42:04,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:42:04,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-16 22:42:04,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-12-16 22:42:04,375 INFO L87 Difference]: Start difference. First operand 2228 states and 5296 transitions. Second operand has 22 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 18 states have internal predecessors, (49), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-16 22:42:04,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:42:04,781 INFO L93 Difference]: Finished difference Result 2752 states and 8022 transitions. [2021-12-16 22:42:04,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 22:42:04,782 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 18 states have internal predecessors, (49), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 70 [2021-12-16 22:42:04,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:42:04,800 INFO L225 Difference]: With dead ends: 2752 [2021-12-16 22:42:04,800 INFO L226 Difference]: Without dead ends: 2748 [2021-12-16 22:42:04,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 128 SyntacticMatches, 19 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-12-16 22:42:04,804 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 30 mSDsluCounter, 1121 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 1201 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 22:42:04,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 1201 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 22:42:04,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2748 states. [2021-12-16 22:42:05,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2748 to 2444. [2021-12-16 22:42:05,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2444 states, 2279 states have (on average 1.39929793769197) internal successors, (3189), 2362 states have internal predecessors, (3189), 66 states have call successors, (66), 18 states have call predecessors, (66), 98 states have return successors, (2649), 63 states have call predecessors, (2649), 66 states have call successors, (2649) [2021-12-16 22:42:05,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2444 states to 2444 states and 5904 transitions. [2021-12-16 22:42:05,700 INFO L78 Accepts]: Start accepts. Automaton has 2444 states and 5904 transitions. Word has length 70 [2021-12-16 22:42:05,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:42:05,700 INFO L470 AbstractCegarLoop]: Abstraction has 2444 states and 5904 transitions. [2021-12-16 22:42:05,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 18 states have internal predecessors, (49), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-16 22:42:05,701 INFO L276 IsEmpty]: Start isEmpty. Operand 2444 states and 5904 transitions. [2021-12-16 22:42:05,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-16 22:42:05,709 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:42:05,709 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:42:05,725 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-12-16 22:42:05,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-12-16 22:42:05,910 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:42:05,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:42:05,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1934637040, now seen corresponding path program 20 times [2021-12-16 22:42:05,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:42:05,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366617780] [2021-12-16 22:42:05,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:42:05,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:42:05,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:42:06,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 22:42:06,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:42:06,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-16 22:42:06,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:42:06,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-16 22:42:06,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:42:06,393 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 13 proven. 227 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-16 22:42:06,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:42:06,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366617780] [2021-12-16 22:42:06,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366617780] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:42:06,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918786056] [2021-12-16 22:42:06,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 22:42:06,393 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:42:06,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:42:06,395 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:42:06,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-12-16 22:42:06,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 22:42:06,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:42:06,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 55 conjunts are in the unsatisfiable core [2021-12-16 22:42:06,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:42:06,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 22:42:06,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-12-16 22:42:06,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-12-16 22:42:07,237 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 19 proven. 218 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-16 22:42:07,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:42:07,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2021-12-16 22:42:07,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2021-12-16 22:42:07,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-12-16 22:42:07,973 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 14 proven. 217 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-16 22:42:07,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918786056] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:42:07,974 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:42:07,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 22] total 50 [2021-12-16 22:42:07,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077020254] [2021-12-16 22:42:07,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:42:07,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-16 22:42:07,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:42:07,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-16 22:42:07,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=2205, Unknown=0, NotChecked=0, Total=2450 [2021-12-16 22:42:07,975 INFO L87 Difference]: Start difference. First operand 2444 states and 5904 transitions. Second operand has 50 states, 45 states have (on average 2.511111111111111) internal successors, (113), 47 states have internal predecessors, (113), 7 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (8), 5 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-16 22:42:13,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:42:13,320 INFO L93 Difference]: Finished difference Result 8959 states and 22370 transitions. [2021-12-16 22:42:13,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2021-12-16 22:42:13,321 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 45 states have (on average 2.511111111111111) internal successors, (113), 47 states have internal predecessors, (113), 7 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (8), 5 states have call predecessors, (8), 7 states have call successors, (8) Word has length 70 [2021-12-16 22:42:13,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:42:13,384 INFO L225 Difference]: With dead ends: 8959 [2021-12-16 22:42:13,385 INFO L226 Difference]: Without dead ends: 8943 [2021-12-16 22:42:13,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 121 SyntacticMatches, 10 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8432 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=2760, Invalid=20496, Unknown=0, NotChecked=0, Total=23256 [2021-12-16 22:42:13,401 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 276 mSDsluCounter, 711 mSDsCounter, 0 mSdLazyCounter, 1442 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 747 SdHoareTripleChecker+Invalid, 2081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 1442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 464 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-16 22:42:13,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 747 Invalid, 2081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 1442 Invalid, 0 Unknown, 464 Unchecked, 0.9s Time] [2021-12-16 22:42:13,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8943 states. [2021-12-16 22:42:14,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8943 to 6147. [2021-12-16 22:42:14,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6147 states, 5853 states have (on average 1.4655732103194943) internal successors, (8578), 6005 states have internal predecessors, (8578), 107 states have call successors, (107), 39 states have call predecessors, (107), 186 states have return successors, (4571), 102 states have call predecessors, (4571), 107 states have call successors, (4571) [2021-12-16 22:42:15,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6147 states to 6147 states and 13256 transitions. [2021-12-16 22:42:15,023 INFO L78 Accepts]: Start accepts. Automaton has 6147 states and 13256 transitions. Word has length 70 [2021-12-16 22:42:15,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:42:15,024 INFO L470 AbstractCegarLoop]: Abstraction has 6147 states and 13256 transitions. [2021-12-16 22:42:15,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 45 states have (on average 2.511111111111111) internal successors, (113), 47 states have internal predecessors, (113), 7 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (8), 5 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-16 22:42:15,024 INFO L276 IsEmpty]: Start isEmpty. Operand 6147 states and 13256 transitions. [2021-12-16 22:42:15,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-16 22:42:15,041 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:42:15,041 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:42:15,057 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-12-16 22:42:15,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:42:15,241 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:42:15,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:42:15,242 INFO L85 PathProgramCache]: Analyzing trace with hash -25285008, now seen corresponding path program 21 times [2021-12-16 22:42:15,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:42:15,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095446410] [2021-12-16 22:42:15,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:42:15,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:42:15,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:42:15,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 22:42:15,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:42:15,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-16 22:42:15,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:42:15,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-16 22:42:15,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:42:16,028 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 66 proven. 166 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-16 22:42:16,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:42:16,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095446410] [2021-12-16 22:42:16,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095446410] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:42:16,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357001511] [2021-12-16 22:42:16,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 22:42:16,031 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:42:16,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:42:16,031 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:42:16,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-12-16 22:42:16,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-16 22:42:16,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:42:16,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 61 conjunts are in the unsatisfiable core [2021-12-16 22:42:16,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:42:16,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 22:42:16,581 INFO L354 Elim1Store]: treesize reduction 30, result has 42.3 percent of original size [2021-12-16 22:42:16,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 39 [2021-12-16 22:42:16,725 INFO L354 Elim1Store]: treesize reduction 70, result has 28.6 percent of original size [2021-12-16 22:42:16,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 48 [2021-12-16 22:42:16,886 INFO L354 Elim1Store]: treesize reduction 99, result has 42.4 percent of original size [2021-12-16 22:42:16,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 103 [2021-12-16 22:42:17,949 INFO L354 Elim1Store]: treesize reduction 64, result has 32.6 percent of original size [2021-12-16 22:42:17,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 75 [2021-12-16 22:43:27,464 WARN L227 SmtUtils]: Spent 28.08s on a formula simplification that was a NOOP. DAG size: 33 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-16 22:43:51,656 WARN L227 SmtUtils]: Spent 24.10s on a formula simplification that was a NOOP. DAG size: 42 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-16 22:44:17,885 WARN L227 SmtUtils]: Spent 26.08s on a formula simplification that was a NOOP. DAG size: 43 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-16 22:44:44,077 WARN L227 SmtUtils]: Spent 26.10s on a formula simplification that was a NOOP. DAG size: 45 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-16 22:45:10,304 WARN L227 SmtUtils]: Spent 26.08s on a formula simplification that was a NOOP. DAG size: 46 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-16 22:45:36,530 WARN L227 SmtUtils]: Spent 26.11s on a formula simplification that was a NOOP. DAG size: 44 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) Killed by 15