./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-patterns/array13_pattern.c --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/array-patterns/array13_pattern.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 78699f7813351c3df7f7fcab3bf98fffd7a92c5cc679034a9d139e9169232d7e --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 00:29:27,144 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 00:29:27,146 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 00:29:27,210 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 00:29:27,210 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 00:29:27,211 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 00:29:27,213 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 00:29:27,215 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 00:29:27,217 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 00:29:27,218 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 00:29:27,218 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 00:29:27,220 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 00:29:27,220 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 00:29:27,223 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 00:29:27,225 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 00:29:27,226 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 00:29:27,227 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 00:29:27,229 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 00:29:27,230 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 00:29:27,233 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 00:29:27,236 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 00:29:27,238 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 00:29:27,239 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 00:29:27,240 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 00:29:27,242 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 00:29:27,245 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 00:29:27,245 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 00:29:27,246 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 00:29:27,247 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 00:29:27,248 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 00:29:27,248 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 00:29:27,249 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 00:29:27,250 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 00:29:27,251 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 00:29:27,252 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 00:29:27,252 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 00:29:27,252 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 00:29:27,252 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 00:29:27,253 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 00:29:27,253 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 00:29:27,254 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 00:29:27,255 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 00:29:27,282 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 00:29:27,283 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 00:29:27,283 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 00:29:27,283 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 00:29:27,284 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 00:29:27,284 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 00:29:27,285 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 00:29:27,285 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 00:29:27,285 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 00:29:27,285 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 00:29:27,286 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 00:29:27,286 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 00:29:27,286 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 00:29:27,286 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 00:29:27,286 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 00:29:27,286 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 00:29:27,286 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 00:29:27,287 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 00:29:27,287 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 00:29:27,287 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 00:29:27,287 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 00:29:27,287 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 00:29:27,287 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 00:29:27,287 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 00:29:27,288 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 00:29:27,288 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 00:29:27,288 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 00:29:27,288 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 00:29:27,288 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 00:29:27,288 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 00:29:27,288 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 00:29:27,289 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 00:29:27,289 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 00:29:27,289 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 00:29:27,289 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 78699f7813351c3df7f7fcab3bf98fffd7a92c5cc679034a9d139e9169232d7e [2021-12-17 00:29:27,472 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 00:29:27,486 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 00:29:27,488 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 00:29:27,489 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 00:29:27,490 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 00:29:27,491 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array13_pattern.c [2021-12-17 00:29:27,535 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02cc12059/fedb36f8f55f4e95a66139525d969167/FLAG8b07ce4e8 [2021-12-17 00:29:27,926 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 00:29:27,926 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array13_pattern.c [2021-12-17 00:29:27,935 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02cc12059/fedb36f8f55f4e95a66139525d969167/FLAG8b07ce4e8 [2021-12-17 00:29:27,947 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02cc12059/fedb36f8f55f4e95a66139525d969167 [2021-12-17 00:29:27,949 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 00:29:27,951 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 00:29:27,954 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 00:29:27,954 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 00:29:27,956 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 00:29:27,957 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 12:29:27" (1/1) ... [2021-12-17 00:29:27,958 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28c05c30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:29:27, skipping insertion in model container [2021-12-17 00:29:27,958 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 12:29:27" (1/1) ... [2021-12-17 00:29:27,964 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 00:29:27,979 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 00:29:28,127 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array13_pattern.c[1342,1355] [2021-12-17 00:29:28,160 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 00:29:28,165 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 00:29:28,176 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array13_pattern.c[1342,1355] [2021-12-17 00:29:28,184 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 00:29:28,192 INFO L208 MainTranslator]: Completed translation [2021-12-17 00:29:28,193 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:29:28 WrapperNode [2021-12-17 00:29:28,193 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 00:29:28,194 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 00:29:28,194 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 00:29:28,194 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 00:29:28,199 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:29:28" (1/1) ... [2021-12-17 00:29:28,210 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:29:28" (1/1) ... [2021-12-17 00:29:28,228 INFO L137 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 95 [2021-12-17 00:29:28,229 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 00:29:28,230 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 00:29:28,230 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 00:29:28,230 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 00:29:28,236 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:29:28" (1/1) ... [2021-12-17 00:29:28,236 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:29:28" (1/1) ... [2021-12-17 00:29:28,239 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:29:28" (1/1) ... [2021-12-17 00:29:28,240 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:29:28" (1/1) ... [2021-12-17 00:29:28,251 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:29:28" (1/1) ... [2021-12-17 00:29:28,254 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:29:28" (1/1) ... [2021-12-17 00:29:28,255 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:29:28" (1/1) ... [2021-12-17 00:29:28,260 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 00:29:28,262 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 00:29:28,263 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 00:29:28,263 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 00:29:28,264 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:29:28" (1/1) ... [2021-12-17 00:29:28,269 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 00:29:28,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:29:28,292 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) [2021-12-17 00:29:28,307 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 [2021-12-17 00:29:28,319 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 00:29:28,319 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-17 00:29:28,319 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-17 00:29:28,320 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 00:29:28,320 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-17 00:29:28,320 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-17 00:29:28,320 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 00:29:28,320 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 00:29:28,320 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-17 00:29:28,320 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-17 00:29:28,372 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 00:29:28,373 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 00:29:28,519 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 00:29:28,523 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 00:29:28,523 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-12-17 00:29:28,524 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 12:29:28 BoogieIcfgContainer [2021-12-17 00:29:28,524 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 00:29:28,525 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 00:29:28,525 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 00:29:28,528 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 00:29:28,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 12:29:27" (1/3) ... [2021-12-17 00:29:28,528 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d07a6e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 12:29:28, skipping insertion in model container [2021-12-17 00:29:28,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:29:28" (2/3) ... [2021-12-17 00:29:28,529 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d07a6e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 12:29:28, skipping insertion in model container [2021-12-17 00:29:28,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 12:29:28" (3/3) ... [2021-12-17 00:29:28,530 INFO L111 eAbstractionObserver]: Analyzing ICFG array13_pattern.c [2021-12-17 00:29:28,533 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 00:29:28,533 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 00:29:28,561 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 00:29:28,580 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 [2021-12-17 00:29:28,580 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 00:29:28,595 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 25 states have (on average 1.6) internal successors, (40), 26 states have internal predecessors, (40), 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) [2021-12-17 00:29:28,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-17 00:29:28,611 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:29:28,612 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:29:28,612 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:29:28,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:29:28,616 INFO L85 PathProgramCache]: Analyzing trace with hash -152131175, now seen corresponding path program 1 times [2021-12-17 00:29:28,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:29:28,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875673361] [2021-12-17 00:29:28,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:29:28,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:29:28,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:29:28,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 00:29:28,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:29:28,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 00:29:28,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:29:28,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875673361] [2021-12-17 00:29:28,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875673361] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 00:29:28,725 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 00:29:28,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 00:29:28,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482378576] [2021-12-17 00:29:28,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 00:29:28,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 00:29:28,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:29:28,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 00:29:28,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 00:29:28,746 INFO L87 Difference]: Start difference. First operand has 31 states, 25 states have (on average 1.6) internal successors, (40), 26 states have internal predecessors, (40), 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 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 00:29:28,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:29:28,759 INFO L93 Difference]: Finished difference Result 59 states and 91 transitions. [2021-12-17 00:29:28,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 00:29:28,760 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-12-17 00:29:28,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:29:28,764 INFO L225 Difference]: With dead ends: 59 [2021-12-17 00:29:28,764 INFO L226 Difference]: Without dead ends: 27 [2021-12-17 00:29:28,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 00:29:28,768 INFO L933 BasicCegarLoop]: 38 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, 38 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 [2021-12-17 00:29:28,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 00:29:28,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-17 00:29:28,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-12-17 00:29:28,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 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) [2021-12-17 00:29:28,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2021-12-17 00:29:28,796 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 15 [2021-12-17 00:29:28,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:29:28,797 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2021-12-17 00:29:28,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 00:29:28,798 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2021-12-17 00:29:28,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-17 00:29:28,800 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:29:28,800 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:29:28,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 00:29:28,802 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:29:28,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:29:28,805 INFO L85 PathProgramCache]: Analyzing trace with hash -2136147464, now seen corresponding path program 1 times [2021-12-17 00:29:28,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:29:28,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466903286] [2021-12-17 00:29:28,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:29:28,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:29:28,832 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:29:28,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1013492398] [2021-12-17 00:29:28,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:29:28,835 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:29:28,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:29:28,837 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) [2021-12-17 00:29:28,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 00:29:28,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:29:28,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 00:29:28,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:29:29,083 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 00:29:29,083 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 00:29:29,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:29:29,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466903286] [2021-12-17 00:29:29,084 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:29:29,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013492398] [2021-12-17 00:29:29,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013492398] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 00:29:29,086 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 00:29:29,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 00:29:29,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673350297] [2021-12-17 00:29:29,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 00:29:29,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 00:29:29,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:29:29,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 00:29:29,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 00:29:29,092 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 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) [2021-12-17 00:29:29,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:29:29,216 INFO L93 Difference]: Finished difference Result 58 states and 72 transitions. [2021-12-17 00:29:29,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 00:29:29,219 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 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 [2021-12-17 00:29:29,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:29:29,220 INFO L225 Difference]: With dead ends: 58 [2021-12-17 00:29:29,221 INFO L226 Difference]: Without dead ends: 39 [2021-12-17 00:29:29,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-12-17 00:29:29,224 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 37 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 00:29:29,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 56 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 00:29:29,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-12-17 00:29:29,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2021-12-17 00:29:29,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-17 00:29:29,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2021-12-17 00:29:29,239 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 28 [2021-12-17 00:29:29,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:29:29,240 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2021-12-17 00:29:29,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 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) [2021-12-17 00:29:29,240 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2021-12-17 00:29:29,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-17 00:29:29,241 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:29:29,242 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:29:29,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 00:29:29,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:29:29,456 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:29:29,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:29:29,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1984127527, now seen corresponding path program 1 times [2021-12-17 00:29:29,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:29:29,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347535733] [2021-12-17 00:29:29,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:29:29,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:29:29,468 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:29:29,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1771321953] [2021-12-17 00:29:29,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:29:29,469 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:29:29,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:29:29,474 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) [2021-12-17 00:29:29,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 00:29:29,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:29:29,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-17 00:29:29,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:29:29,617 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 00:29:29,617 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 00:29:29,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:29:29,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347535733] [2021-12-17 00:29:29,617 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:29:29,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771321953] [2021-12-17 00:29:29,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771321953] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 00:29:29,618 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 00:29:29,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 00:29:29,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922146456] [2021-12-17 00:29:29,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 00:29:29,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 00:29:29,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:29:29,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 00:29:29,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 00:29:29,620 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 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) [2021-12-17 00:29:29,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:29:29,655 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2021-12-17 00:29:29,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 00:29:29,655 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 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 34 [2021-12-17 00:29:29,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:29:29,656 INFO L225 Difference]: With dead ends: 61 [2021-12-17 00:29:29,656 INFO L226 Difference]: Without dead ends: 37 [2021-12-17 00:29:29,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 00:29:29,657 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 23 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 00:29:29,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 48 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 00:29:29,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-12-17 00:29:29,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2021-12-17 00:29:29,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-17 00:29:29,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2021-12-17 00:29:29,662 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 34 [2021-12-17 00:29:29,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:29:29,663 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2021-12-17 00:29:29,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 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) [2021-12-17 00:29:29,670 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2021-12-17 00:29:29,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-17 00:29:29,671 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:29:29,672 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:29:29,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 00:29:29,891 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,SelfDestructingSolverStorable2 [2021-12-17 00:29:29,892 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:29:29,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:29:29,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1380575367, now seen corresponding path program 1 times [2021-12-17 00:29:29,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:29:29,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779167294] [2021-12-17 00:29:29,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:29:29,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:29:29,901 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:29:29,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [740561388] [2021-12-17 00:29:29,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:29:29,901 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:29:29,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:29:29,903 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) [2021-12-17 00:29:29,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 00:29:29,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:29:29,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-17 00:29:29,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:29:30,109 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 00:29:30,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:29:30,341 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 00:29:30,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:29:30,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779167294] [2021-12-17 00:29:30,341 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:29:30,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740561388] [2021-12-17 00:29:30,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740561388] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:29:30,342 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:29:30,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-12-17 00:29:30,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994290375] [2021-12-17 00:29:30,342 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:29:30,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-17 00:29:30,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:29:30,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-17 00:29:30,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-12-17 00:29:30,344 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 18 states, 16 states have (on average 2.4375) internal successors, (39), 13 states have internal predecessors, (39), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-17 00:29:30,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:29:30,741 INFO L93 Difference]: Finished difference Result 129 states and 152 transitions. [2021-12-17 00:29:30,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-17 00:29:30,742 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.4375) internal successors, (39), 13 states have internal predecessors, (39), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 38 [2021-12-17 00:29:30,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:29:30,747 INFO L225 Difference]: With dead ends: 129 [2021-12-17 00:29:30,747 INFO L226 Difference]: Without dead ends: 108 [2021-12-17 00:29:30,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2021-12-17 00:29:30,750 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 137 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 00:29:30,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 178 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 00:29:30,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-12-17 00:29:30,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 58. [2021-12-17 00:29:30,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 48 states have internal predecessors, (57), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-17 00:29:30,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 69 transitions. [2021-12-17 00:29:30,781 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 69 transitions. Word has length 38 [2021-12-17 00:29:30,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:29:30,781 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 69 transitions. [2021-12-17 00:29:30,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.4375) internal successors, (39), 13 states have internal predecessors, (39), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-17 00:29:30,783 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 69 transitions. [2021-12-17 00:29:30,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-17 00:29:30,785 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:29:30,785 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:29:30,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 00:29:31,003 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 [2021-12-17 00:29:31,003 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:29:31,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:29:31,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1967381381, now seen corresponding path program 1 times [2021-12-17 00:29:31,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:29:31,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443364174] [2021-12-17 00:29:31,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:29:31,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:29:31,028 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:29:31,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [155217740] [2021-12-17 00:29:31,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:29:31,029 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:29:31,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:29:31,030 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) [2021-12-17 00:29:31,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 00:29:31,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:29:31,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-17 00:29:31,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:29:31,162 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 0 case distinctions, treesize of input 44 treesize of output 39 [2021-12-17 00:29:31,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-12-17 00:29:31,437 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 0 case distinctions, treesize of input 97 treesize of output 86 [2021-12-17 00:29:31,472 INFO L354 Elim1Store]: treesize reduction 152, result has 22.1 percent of original size [2021-12-17 00:29:31,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 85 treesize of output 103 [2021-12-17 00:29:31,553 INFO L354 Elim1Store]: treesize reduction 47, result has 2.1 percent of original size [2021-12-17 00:29:31,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 28 [2021-12-17 00:29:31,647 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 39 treesize of output 27 [2021-12-17 00:29:31,722 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 00:29:31,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:29:40,684 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 55 treesize of output 51 [2021-12-17 00:29:40,694 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 00:29:40,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 58 [2021-12-17 00:29:40,712 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 32 treesize of output 17 [2021-12-17 00:29:40,751 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 00:29:40,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 52 [2021-12-17 00:29:40,852 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 00:29:40,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 78 [2021-12-17 00:29:41,561 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 00:29:41,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:29:41,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443364174] [2021-12-17 00:29:41,562 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:29:41,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155217740] [2021-12-17 00:29:41,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155217740] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:29:41,562 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:29:41,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-12-17 00:29:41,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569081187] [2021-12-17 00:29:41,563 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:29:41,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-17 00:29:41,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:29:41,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-17 00:29:41,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=360, Unknown=1, NotChecked=0, Total=462 [2021-12-17 00:29:41,564 INFO L87 Difference]: Start difference. First operand 58 states and 69 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-17 00:29:43,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:29:43,991 INFO L93 Difference]: Finished difference Result 130 states and 158 transitions. [2021-12-17 00:29:43,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-17 00:29:43,991 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 38 [2021-12-17 00:29:43,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:29:43,993 INFO L225 Difference]: With dead ends: 130 [2021-12-17 00:29:43,993 INFO L226 Difference]: Without dead ends: 124 [2021-12-17 00:29:43,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 51 SyntacticMatches, 6 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=386, Invalid=1335, Unknown=1, NotChecked=0, Total=1722 [2021-12-17 00:29:43,994 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 104 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-17 00:29:43,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 214 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 356 Invalid, 0 Unknown, 108 Unchecked, 1.0s Time] [2021-12-17 00:29:43,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-12-17 00:29:44,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 70. [2021-12-17 00:29:44,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 57 states have (on average 1.2280701754385965) internal successors, (70), 58 states have internal predecessors, (70), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-17 00:29:44,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 86 transitions. [2021-12-17 00:29:44,001 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 86 transitions. Word has length 38 [2021-12-17 00:29:44,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:29:44,002 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 86 transitions. [2021-12-17 00:29:44,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-17 00:29:44,002 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 86 transitions. [2021-12-17 00:29:44,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-17 00:29:44,002 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:29:44,002 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:29:44,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 00:29:44,220 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 [2021-12-17 00:29:44,221 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:29:44,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:29:44,221 INFO L85 PathProgramCache]: Analyzing trace with hash -707639139, now seen corresponding path program 2 times [2021-12-17 00:29:44,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:29:44,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738969403] [2021-12-17 00:29:44,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:29:44,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:29:44,231 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:29:44,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1092687338] [2021-12-17 00:29:44,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 00:29:44,231 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:29:44,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:29:44,239 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) [2021-12-17 00:29:44,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 00:29:44,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 00:29:44,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:29:44,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-17 00:29:44,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:29:44,370 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 00:29:44,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:29:44,426 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 00:29:44,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:29:44,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738969403] [2021-12-17 00:29:44,426 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:29:44,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092687338] [2021-12-17 00:29:44,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092687338] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:29:44,426 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:29:44,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-12-17 00:29:44,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052182896] [2021-12-17 00:29:44,426 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:29:44,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 00:29:44,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:29:44,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 00:29:44,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-17 00:29:44,427 INFO L87 Difference]: Start difference. First operand 70 states and 86 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 00:29:44,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:29:44,539 INFO L93 Difference]: Finished difference Result 146 states and 176 transitions. [2021-12-17 00:29:44,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 00:29:44,540 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 40 [2021-12-17 00:29:44,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:29:44,541 INFO L225 Difference]: With dead ends: 146 [2021-12-17 00:29:44,541 INFO L226 Difference]: Without dead ends: 109 [2021-12-17 00:29:44,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-12-17 00:29:44,542 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 133 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 00:29:44,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 98 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 00:29:44,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-12-17 00:29:44,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 83. [2021-12-17 00:29:44,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 70 states have (on average 1.2) internal successors, (84), 71 states have internal predecessors, (84), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-17 00:29:44,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 100 transitions. [2021-12-17 00:29:44,552 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 100 transitions. Word has length 40 [2021-12-17 00:29:44,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:29:44,553 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 100 transitions. [2021-12-17 00:29:44,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 00:29:44,553 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 100 transitions. [2021-12-17 00:29:44,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-17 00:29:44,554 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:29:44,554 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:29:44,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-17 00:29:44,775 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 [2021-12-17 00:29:44,775 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:29:44,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:29:44,776 INFO L85 PathProgramCache]: Analyzing trace with hash -291961609, now seen corresponding path program 2 times [2021-12-17 00:29:44,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:29:44,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196505256] [2021-12-17 00:29:44,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:29:44,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:29:44,783 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:29:44,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [369447368] [2021-12-17 00:29:44,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 00:29:44,784 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:29:44,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:29:44,785 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) [2021-12-17 00:29:44,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 00:29:44,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 00:29:44,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:29:44,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-17 00:29:44,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:29:44,916 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 00:29:44,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:29:45,000 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-17 00:29:45,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:29:45,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196505256] [2021-12-17 00:29:45,001 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:29:45,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369447368] [2021-12-17 00:29:45,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369447368] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:29:45,001 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:29:45,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-12-17 00:29:45,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683438984] [2021-12-17 00:29:45,002 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:29:45,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-17 00:29:45,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:29:45,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-17 00:29:45,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-12-17 00:29:45,003 INFO L87 Difference]: Start difference. First operand 83 states and 100 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 00:29:45,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:29:45,139 INFO L93 Difference]: Finished difference Result 154 states and 192 transitions. [2021-12-17 00:29:45,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-17 00:29:45,140 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 40 [2021-12-17 00:29:45,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:29:45,140 INFO L225 Difference]: With dead ends: 154 [2021-12-17 00:29:45,140 INFO L226 Difference]: Without dead ends: 113 [2021-12-17 00:29:45,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-12-17 00:29:45,141 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 45 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 00:29:45,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 96 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 00:29:45,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-12-17 00:29:45,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 97. [2021-12-17 00:29:45,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 84 states have (on average 1.2142857142857142) internal successors, (102), 85 states have internal predecessors, (102), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-17 00:29:45,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 118 transitions. [2021-12-17 00:29:45,151 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 118 transitions. Word has length 40 [2021-12-17 00:29:45,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:29:45,152 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 118 transitions. [2021-12-17 00:29:45,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 00:29:45,152 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 118 transitions. [2021-12-17 00:29:45,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-17 00:29:45,153 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:29:45,153 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:29:45,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-17 00:29:45,370 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 [2021-12-17 00:29:45,371 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:29:45,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:29:45,371 INFO L85 PathProgramCache]: Analyzing trace with hash -967924134, now seen corresponding path program 3 times [2021-12-17 00:29:45,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:29:45,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700251164] [2021-12-17 00:29:45,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:29:45,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:29:45,378 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:29:45,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1482597309] [2021-12-17 00:29:45,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 00:29:45,379 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:29:45,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:29:45,396 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) [2021-12-17 00:29:45,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-17 00:29:45,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-17 00:29:45,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:29:45,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-17 00:29:45,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:29:45,567 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 00:29:45,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:29:45,639 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 00:29:45,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:29:45,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700251164] [2021-12-17 00:29:45,640 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:29:45,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482597309] [2021-12-17 00:29:45,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482597309] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:29:45,640 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:29:45,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-12-17 00:29:45,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704323672] [2021-12-17 00:29:45,641 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:29:45,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 00:29:45,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:29:45,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 00:29:45,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-17 00:29:45,642 INFO L87 Difference]: Start difference. First operand 97 states and 118 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-17 00:29:45,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:29:45,740 INFO L93 Difference]: Finished difference Result 136 states and 160 transitions. [2021-12-17 00:29:45,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 00:29:45,740 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2021-12-17 00:29:45,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:29:45,741 INFO L225 Difference]: With dead ends: 136 [2021-12-17 00:29:45,741 INFO L226 Difference]: Without dead ends: 68 [2021-12-17 00:29:45,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-12-17 00:29:45,742 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 33 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 00:29:45,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 92 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 00:29:45,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-12-17 00:29:45,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2021-12-17 00:29:45,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 58 states have (on average 1.1896551724137931) internal successors, (69), 58 states have internal predecessors, (69), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-17 00:29:45,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2021-12-17 00:29:45,748 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 43 [2021-12-17 00:29:45,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:29:45,748 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2021-12-17 00:29:45,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-17 00:29:45,748 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2021-12-17 00:29:45,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-17 00:29:45,749 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:29:45,749 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:29:45,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-17 00:29:45,955 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 [2021-12-17 00:29:45,955 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:29:45,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:29:45,956 INFO L85 PathProgramCache]: Analyzing trace with hash 441313725, now seen corresponding path program 3 times [2021-12-17 00:29:45,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:29:45,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132534576] [2021-12-17 00:29:45,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:29:45,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:29:45,962 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:29:45,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1750138380] [2021-12-17 00:29:45,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 00:29:45,963 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:29:45,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:29:45,964 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) [2021-12-17 00:29:46,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-17 00:29:46,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-17 00:29:46,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:29:46,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-17 00:29:46,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:29:46,171 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-17 00:29:46,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:29:46,377 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-17 00:29:46,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:29:46,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132534576] [2021-12-17 00:29:46,378 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:29:46,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750138380] [2021-12-17 00:29:46,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750138380] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:29:46,378 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:29:46,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-12-17 00:29:46,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333042028] [2021-12-17 00:29:46,380 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:29:46,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 00:29:46,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:29:46,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 00:29:46,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-12-17 00:29:46,382 INFO L87 Difference]: Start difference. First operand 66 states and 79 transitions. Second operand has 19 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 14 states have internal predecessors, (45), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-17 00:29:46,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:29:46,621 INFO L93 Difference]: Finished difference Result 96 states and 110 transitions. [2021-12-17 00:29:46,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-17 00:29:46,622 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 14 states have internal predecessors, (45), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 47 [2021-12-17 00:29:46,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:29:46,624 INFO L225 Difference]: With dead ends: 96 [2021-12-17 00:29:46,624 INFO L226 Difference]: Without dead ends: 90 [2021-12-17 00:29:46,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=211, Invalid=659, Unknown=0, NotChecked=0, Total=870 [2021-12-17 00:29:46,626 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 106 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 00:29:46,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 123 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 00:29:46,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-12-17 00:29:46,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 53. [2021-12-17 00:29:46,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 47 states have internal predecessors, (55), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-17 00:29:46,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2021-12-17 00:29:46,635 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 47 [2021-12-17 00:29:46,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:29:46,636 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2021-12-17 00:29:46,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 14 states have internal predecessors, (45), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-17 00:29:46,637 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2021-12-17 00:29:46,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-17 00:29:46,637 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:29:46,637 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:29:46,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-17 00:29:46,856 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 [2021-12-17 00:29:46,856 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:29:46,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:29:46,857 INFO L85 PathProgramCache]: Analyzing trace with hash -4709032, now seen corresponding path program 4 times [2021-12-17 00:29:46,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:29:46,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189190683] [2021-12-17 00:29:46,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:29:46,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:29:46,874 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:29:46,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1547096995] [2021-12-17 00:29:46,876 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 00:29:46,877 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:29:46,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:29:46,892 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) [2021-12-17 00:29:46,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-17 00:29:47,047 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 00:29:47,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:29:47,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 65 conjunts are in the unsatisfiable core [2021-12-17 00:29:47,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:29:47,176 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 0 case distinctions, treesize of input 60 treesize of output 55 [2021-12-17 00:29:47,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 00:29:47,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 56 [2021-12-17 00:29:47,190 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 29 treesize of output 16 [2021-12-17 00:29:47,205 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 48 treesize of output 22 [2021-12-17 00:29:47,265 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 0 case distinctions, treesize of input 79 treesize of output 72 [2021-12-17 00:29:47,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:29:47,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:29:47,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 00:29:47,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 93 [2021-12-17 00:29:47,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:29:47,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 21 [2021-12-17 00:29:47,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:29:47,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 26 [2021-12-17 00:29:47,469 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 0 case distinctions, treesize of input 76 treesize of output 67 [2021-12-17 00:29:47,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:29:47,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:29:47,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:29:47,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:29:47,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:29:47,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:29:47,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 88 [2021-12-17 00:29:47,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:29:47,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:29:47,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:29:47,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 12 [2021-12-17 00:29:47,616 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 0 case distinctions, treesize of input 79 treesize of output 68 [2021-12-17 00:29:47,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:29:47,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:29:47,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:29:47,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:29:47,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:29:47,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:29:47,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:29:47,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:29:47,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:29:47,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:29:47,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 103 [2021-12-17 00:29:47,647 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-17 00:29:47,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:29:47,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:29:47,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:29:47,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:29:47,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:29:47,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:29:47,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 53 [2021-12-17 00:29:48,236 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 0 case distinctions, treesize of input 103 treesize of output 90 [2021-12-17 00:29:48,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:29:48,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:29:48,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:29:48,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:29:48,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:29:48,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:29:48,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:29:48,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:29:48,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:29:48,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:29:48,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:29:48,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:29:48,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:29:48,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:29:48,348 INFO L244 Elim1Store]: Index analysis took 107 ms [2021-12-17 00:29:48,619 INFO L354 Elim1Store]: treesize reduction 37, result has 43.9 percent of original size [2021-12-17 00:29:48,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 14 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 158 [2021-12-17 00:29:49,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:29:49,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:29:49,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:29:49,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:29:49,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:29:49,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:29:49,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:29:49,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:29:49,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:29:49,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:29:49,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 58 [2021-12-17 00:29:49,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:29:49,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:29:49,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:29:49,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:29:49,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:29:49,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:29:49,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:29:49,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:29:49,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:29:49,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:29:49,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 47 [2021-12-17 00:29:58,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:29:58,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:29:58,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:29:58,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:29:58,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:29:58,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:29:58,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:29:58,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:29:58,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:29:58,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:29:58,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:29:58,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:29:58,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:29:58,271 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 00:29:58,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 185 treesize of output 99 [2021-12-17 00:29:59,142 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 00:29:59,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:30:33,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:30:33,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189190683] [2021-12-17 00:30:33,502 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:30:33,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547096995] [2021-12-17 00:30:33,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547096995] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:30:33,502 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 00:30:33,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2021-12-17 00:30:33,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932622187] [2021-12-17 00:30:33,502 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 00:30:33,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-17 00:30:33,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:30:33,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-17 00:30:33,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=1765, Unknown=10, NotChecked=0, Total=2070 [2021-12-17 00:30:33,504 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 32 states, 32 states have (on average 1.5625) internal successors, (50), 31 states have internal predecessors, (50), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 00:30:34,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:30:34,006 INFO L93 Difference]: Finished difference Result 101 states and 118 transitions. [2021-12-17 00:30:34,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-17 00:30:34,007 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.5625) internal successors, (50), 31 states have internal predecessors, (50), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 56 [2021-12-17 00:30:34,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:30:34,008 INFO L225 Difference]: With dead ends: 101 [2021-12-17 00:30:34,008 INFO L226 Difference]: Without dead ends: 97 [2021-12-17 00:30:34,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1024 ImplicationChecksByTransitivity, 29.3s TimeCoverageRelationStatistics Valid=323, Invalid=2019, Unknown=10, NotChecked=0, Total=2352 [2021-12-17 00:30:34,009 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 30 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 208 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 00:30:34,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 183 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 185 Invalid, 0 Unknown, 208 Unchecked, 0.2s Time] [2021-12-17 00:30:34,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-12-17 00:30:34,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 88. [2021-12-17 00:30:34,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 79 states have (on average 1.1898734177215189) internal successors, (94), 79 states have internal predecessors, (94), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-17 00:30:34,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 104 transitions. [2021-12-17 00:30:34,019 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 104 transitions. Word has length 56 [2021-12-17 00:30:34,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:30:34,020 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 104 transitions. [2021-12-17 00:30:34,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.5625) internal successors, (50), 31 states have internal predecessors, (50), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 00:30:34,020 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 104 transitions. [2021-12-17 00:30:34,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-17 00:30:34,021 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:30:34,021 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:30:34,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-17 00:30:34,238 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 [2021-12-17 00:30:34,238 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:30:34,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:30:34,239 INFO L85 PathProgramCache]: Analyzing trace with hash 214145686, now seen corresponding path program 4 times [2021-12-17 00:30:34,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:30:34,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689780604] [2021-12-17 00:30:34,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:30:34,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:30:34,245 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:30:34,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [556720263] [2021-12-17 00:30:34,246 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 00:30:34,246 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:30:34,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:30:34,247 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) [2021-12-17 00:30:34,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-17 00:30:34,581 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 00:30:34,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:30:34,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-17 00:30:34,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:30:34,668 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 0 case distinctions, treesize of input 60 treesize of output 55 [2021-12-17 00:30:34,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 00:30:34,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 56 [2021-12-17 00:30:34,677 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 29 treesize of output 16 [2021-12-17 00:30:34,700 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 48 treesize of output 22 [2021-12-17 00:30:34,750 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 0 case distinctions, treesize of input 75 treesize of output 68 [2021-12-17 00:30:34,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:30:34,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:30:34,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 00:30:34,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 85 [2021-12-17 00:30:34,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:30:34,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 30 [2021-12-17 00:30:34,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:30:34,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 40 [2021-12-17 00:30:34,967 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 0 case distinctions, treesize of input 95 treesize of output 86 [2021-12-17 00:30:34,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:30:34,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:30:34,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:30:34,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:30:34,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:30:34,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:30:34,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 126 [2021-12-17 00:30:35,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:30:35,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:30:35,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:30:35,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 51 [2021-12-17 00:30:35,108 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 0 case distinctions, treesize of input 79 treesize of output 68 [2021-12-17 00:30:35,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:30:35,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:30:35,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:30:35,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:30:35,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:30:35,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:30:35,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:30:35,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:30:35,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:30:35,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:30:35,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 103 [2021-12-17 00:30:35,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:30:35,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:30:35,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:30:35,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:30:35,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:30:35,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:30:35,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 39 [2021-12-17 00:30:35,638 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 0 case distinctions, treesize of input 133 treesize of output 116 [2021-12-17 00:30:35,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:30:35,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:30:35,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:30:35,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:30:35,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:30:35,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:30:35,828 INFO L354 Elim1Store]: treesize reduction 479, result has 25.7 percent of original size [2021-12-17 00:30:35,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 13 case distinctions, treesize of input 115 treesize of output 235 [2021-12-17 00:30:36,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:30:36,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:30:36,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:30:36,561 INFO L354 Elim1Store]: treesize reduction 274, result has 0.4 percent of original size [2021-12-17 00:30:36,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 152 treesize of output 57 [2021-12-17 00:30:37,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:30:37,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:30:37,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:30:37,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:30:37,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:30:37,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:30:37,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:30:37,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:30:37,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:30:37,491 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 00:30:37,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 104 treesize of output 42 [2021-12-17 00:30:37,571 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 50 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 00:30:37,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:31:24,555 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 55 treesize of output 51 [2021-12-17 00:31:24,938 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 00:31:24,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 58 [2021-12-17 00:31:25,426 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 32 treesize of output 17 [2021-12-17 00:31:27,140 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 49 treesize of output 23 [2021-12-17 00:31:32,591 INFO L354 Elim1Store]: treesize reduction 260, result has 56.4 percent of original size [2021-12-17 00:31:32,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 26567599 treesize of output 25404642 [2021-12-17 00:32:09,184 WARN L227 SmtUtils]: Spent 36.58s on a formula simplification that was a NOOP. DAG size: 5864 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-17 00:32:09,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:32:09,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689780604] [2021-12-17 00:32:09,270 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:32:09,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556720263] [2021-12-17 00:32:09,271 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-12-17 00:32:09,271 INFO L186 FreeRefinementEngine]: Found 0 perfect and 0 imperfect interpolant sequences. [2021-12-17 00:32:09,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-12-17 00:32:09,271 ERROR L172 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-12-17 00:32:09,271 INFO L628 BasicCegarLoop]: Counterexample might be feasible [2021-12-17 00:32:09,275 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-17 00:32:09,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-17 00:32:09,496 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 [2021-12-17 00:32:09,499 INFO L732 BasicCegarLoop]: Path program histogram: [4, 4, 1, 1, 1] [2021-12-17 00:32:09,500 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-17 00:32:09,514 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.12 12:32:09 BoogieIcfgContainer [2021-12-17 00:32:09,514 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-17 00:32:09,515 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-17 00:32:09,515 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-17 00:32:09,515 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-17 00:32:09,515 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 12:29:28" (3/4) ... [2021-12-17 00:32:09,517 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-17 00:32:09,517 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-17 00:32:09,517 INFO L158 Benchmark]: Toolchain (without parser) took 161566.19ms. Allocated memory was 167.8MB in the beginning and 841.0MB in the end (delta: 673.2MB). Free memory was 136.5MB in the beginning and 456.4MB in the end (delta: -319.9MB). Peak memory consumption was 351.9MB. Max. memory is 16.1GB. [2021-12-17 00:32:09,518 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 83.9MB. Free memory is still 41.5MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 00:32:09,519 INFO L158 Benchmark]: CACSL2BoogieTranslator took 239.51ms. Allocated memory is still 167.8MB. Free memory was 135.8MB in the beginning and 140.5MB in the end (delta: -4.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-17 00:32:09,519 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.38ms. Allocated memory is still 167.8MB. Free memory was 140.5MB in the beginning and 138.4MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 00:32:09,520 INFO L158 Benchmark]: Boogie Preprocessor took 31.83ms. Allocated memory is still 167.8MB. Free memory was 138.4MB in the beginning and 137.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 00:32:09,520 INFO L158 Benchmark]: RCFGBuilder took 261.88ms. Allocated memory is still 167.8MB. Free memory was 137.0MB in the beginning and 125.8MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-17 00:32:09,520 INFO L158 Benchmark]: TraceAbstraction took 160989.03ms. Allocated memory was 167.8MB in the beginning and 841.0MB in the end (delta: 673.2MB). Free memory was 125.1MB in the beginning and 456.4MB in the end (delta: -331.3MB). Peak memory consumption was 496.1MB. Max. memory is 16.1GB. [2021-12-17 00:32:09,520 INFO L158 Benchmark]: Witness Printer took 2.30ms. Allocated memory is still 841.0MB. Free memory is still 456.4MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 00:32:09,521 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 83.9MB. Free memory is still 41.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 239.51ms. Allocated memory is still 167.8MB. Free memory was 135.8MB in the beginning and 140.5MB in the end (delta: -4.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 35.38ms. Allocated memory is still 167.8MB. Free memory was 140.5MB in the beginning and 138.4MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 31.83ms. Allocated memory is still 167.8MB. Free memory was 138.4MB in the beginning and 137.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 261.88ms. Allocated memory is still 167.8MB. Free memory was 137.0MB in the beginning and 125.8MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 160989.03ms. Allocated memory was 167.8MB in the beginning and 841.0MB in the end (delta: 673.2MB). Free memory was 125.1MB in the beginning and 456.4MB in the end (delta: -331.3MB). Peak memory consumption was 496.1MB. Max. memory is 16.1GB. * Witness Printer took 2.30ms. Allocated memory is still 841.0MB. Free memory is still 456.4MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 33]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L37] signed long long ARR_SIZE ; [L41] ARR_SIZE = (signed long long)__VERIFIER_nondet_short() [L42] CALL assume_abort_if_not(ARR_SIZE > 0) [L31] COND FALSE !(!cond) [L42] RET assume_abort_if_not(ARR_SIZE > 0) [L44] int array[ARR_SIZE][ARR_SIZE] ; [L46] int row = 0, column = 0, num = -1; [L47] signed long long sum = 0 ; [L48] int temp ; [L49] short index1,index2 ; [L51] row=0 [L51] COND TRUE row=0 && index1 < ARR_SIZE) [L31] COND FALSE !(!cond) [L60] RET assume_abort_if_not(index1>=0 && index1 < ARR_SIZE) [L61] CALL assume_abort_if_not(index2>=0 && index2 < ARR_SIZE) [L31] COND FALSE !(!cond) [L61] RET assume_abort_if_not(index2>=0 && index2 < ARR_SIZE) [L63] EXPR (index1 > index2) ? (num*num*num*num) : array[index1][index2] [L63] EXPR array[index1][index2] [L63] EXPR (index1 > index2) ? (num*num*num*num) : array[index1][index2] [L63] array[index1][index2] = (index1 > index2) ? (num*num*num*num) : array[index1][index2] [L66] temp = __VERIFIER_nondet_int() [L67] COND TRUE temp == 0 [L70] row=0 [L70] COND TRUE row 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 -> 78699f7813351c3df7f7fcab3bf98fffd7a92c5cc679034a9d139e9169232d7e [2021-12-17 00:32:11,809 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 00:32:11,830 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 00:32:11,832 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 00:32:11,832 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 00:32:11,833 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 00:32:11,834 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array13_pattern.c [2021-12-17 00:32:11,877 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8362f1b75/8cbad721023b49bb8346531705bb60ae/FLAG3a0558732 [2021-12-17 00:32:12,225 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 00:32:12,225 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array13_pattern.c [2021-12-17 00:32:12,230 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8362f1b75/8cbad721023b49bb8346531705bb60ae/FLAG3a0558732 [2021-12-17 00:32:12,244 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8362f1b75/8cbad721023b49bb8346531705bb60ae [2021-12-17 00:32:12,246 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 00:32:12,248 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 00:32:12,249 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 00:32:12,250 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 00:32:12,252 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 00:32:12,252 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 12:32:12" (1/1) ... [2021-12-17 00:32:12,253 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@486204dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:32:12, skipping insertion in model container [2021-12-17 00:32:12,253 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 12:32:12" (1/1) ... [2021-12-17 00:32:12,257 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 00:32:12,270 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 00:32:12,387 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array13_pattern.c[1342,1355] [2021-12-17 00:32:12,441 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 00:32:12,453 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 00:32:12,464 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array13_pattern.c[1342,1355] [2021-12-17 00:32:12,487 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 00:32:12,499 INFO L208 MainTranslator]: Completed translation [2021-12-17 00:32:12,500 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:32:12 WrapperNode [2021-12-17 00:32:12,500 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 00:32:12,501 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 00:32:12,501 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 00:32:12,501 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 00:32:12,505 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:32:12" (1/1) ... [2021-12-17 00:32:12,516 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:32:12" (1/1) ... [2021-12-17 00:32:12,535 INFO L137 Inliner]: procedures = 18, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 91 [2021-12-17 00:32:12,535 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 00:32:12,536 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 00:32:12,536 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 00:32:12,536 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 00:32:12,541 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:32:12" (1/1) ... [2021-12-17 00:32:12,542 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:32:12" (1/1) ... [2021-12-17 00:32:12,547 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:32:12" (1/1) ... [2021-12-17 00:32:12,547 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:32:12" (1/1) ... [2021-12-17 00:32:12,561 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:32:12" (1/1) ... [2021-12-17 00:32:12,565 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:32:12" (1/1) ... [2021-12-17 00:32:12,569 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:32:12" (1/1) ... [2021-12-17 00:32:12,571 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 00:32:12,572 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 00:32:12,572 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 00:32:12,573 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 00:32:12,574 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:32:12" (1/1) ... [2021-12-17 00:32:12,578 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 00:32:12,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:32:12,593 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) [2021-12-17 00:32:12,614 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 [2021-12-17 00:32:12,642 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 00:32:12,643 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-17 00:32:12,643 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-17 00:32:12,643 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-17 00:32:12,643 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-17 00:32:12,643 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-17 00:32:12,643 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 00:32:12,644 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 00:32:12,644 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-17 00:32:12,644 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-17 00:32:12,698 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 00:32:12,699 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 00:32:13,084 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 00:32:13,088 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 00:32:13,089 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-12-17 00:32:13,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 12:32:13 BoogieIcfgContainer [2021-12-17 00:32:13,090 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 00:32:13,091 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 00:32:13,091 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 00:32:13,095 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 00:32:13,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 12:32:12" (1/3) ... [2021-12-17 00:32:13,096 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f4133d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 12:32:13, skipping insertion in model container [2021-12-17 00:32:13,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:32:12" (2/3) ... [2021-12-17 00:32:13,096 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f4133d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 12:32:13, skipping insertion in model container [2021-12-17 00:32:13,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 12:32:13" (3/3) ... [2021-12-17 00:32:13,097 INFO L111 eAbstractionObserver]: Analyzing ICFG array13_pattern.c [2021-12-17 00:32:13,101 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 00:32:13,101 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 00:32:13,143 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 00:32:13,151 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 [2021-12-17 00:32:13,152 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 00:32:13,163 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 25 states have (on average 1.6) internal successors, (40), 26 states have internal predecessors, (40), 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) [2021-12-17 00:32:13,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-17 00:32:13,167 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:32:13,167 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:32:13,168 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:32:13,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:32:13,172 INFO L85 PathProgramCache]: Analyzing trace with hash -152131175, now seen corresponding path program 1 times [2021-12-17 00:32:13,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:32:13,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1697723435] [2021-12-17 00:32:13,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:32:13,181 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:32:13,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:32:13,182 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:32:13,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-17 00:32:13,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:32:13,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-17 00:32:13,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:32:13,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 00:32:13,324 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 00:32:13,325 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:32:13,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1697723435] [2021-12-17 00:32:13,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1697723435] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 00:32:13,326 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 00:32:13,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 00:32:13,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013796278] [2021-12-17 00:32:13,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 00:32:13,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 00:32:13,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:32:13,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 00:32:13,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 00:32:13,354 INFO L87 Difference]: Start difference. First operand has 31 states, 25 states have (on average 1.6) internal successors, (40), 26 states have internal predecessors, (40), 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 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 00:32:13,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:32:13,370 INFO L93 Difference]: Finished difference Result 59 states and 91 transitions. [2021-12-17 00:32:13,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 00:32:13,373 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-12-17 00:32:13,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:32:13,377 INFO L225 Difference]: With dead ends: 59 [2021-12-17 00:32:13,377 INFO L226 Difference]: Without dead ends: 27 [2021-12-17 00:32:13,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 00:32:13,382 INFO L933 BasicCegarLoop]: 38 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, 38 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 [2021-12-17 00:32:13,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 00:32:13,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-17 00:32:13,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-12-17 00:32:13,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 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) [2021-12-17 00:32:13,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2021-12-17 00:32:13,413 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 15 [2021-12-17 00:32:13,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:32:13,414 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2021-12-17 00:32:13,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 00:32:13,415 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2021-12-17 00:32:13,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-17 00:32:13,416 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:32:13,416 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:32:13,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-17 00:32:13,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:32:13,625 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:32:13,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:32:13,631 INFO L85 PathProgramCache]: Analyzing trace with hash -2136147464, now seen corresponding path program 1 times [2021-12-17 00:32:13,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:32:13,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [584881577] [2021-12-17 00:32:13,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:32:13,634 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:32:13,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:32:13,635 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:32:13,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-17 00:32:13,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:32:13,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-17 00:32:13,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:32:13,931 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 00:32:13,932 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 00:32:13,932 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:32:13,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [584881577] [2021-12-17 00:32:13,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [584881577] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 00:32:13,933 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 00:32:13,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 00:32:13,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135373178] [2021-12-17 00:32:13,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 00:32:13,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 00:32:13,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:32:13,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 00:32:13,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-12-17 00:32:13,935 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 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) [2021-12-17 00:32:13,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:32:13,943 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2021-12-17 00:32:13,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 00:32:13,943 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 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 [2021-12-17 00:32:13,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:32:13,944 INFO L225 Difference]: With dead ends: 51 [2021-12-17 00:32:13,944 INFO L226 Difference]: Without dead ends: 32 [2021-12-17 00:32:13,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-12-17 00:32:13,945 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 2 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 00:32:13,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 79 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 36 Unchecked, 0.0s Time] [2021-12-17 00:32:13,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-12-17 00:32:13,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-12-17 00:32:13,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-17 00:32:13,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2021-12-17 00:32:13,951 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 28 [2021-12-17 00:32:13,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:32:13,951 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2021-12-17 00:32:13,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 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) [2021-12-17 00:32:13,952 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2021-12-17 00:32:13,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-17 00:32:13,952 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:32:13,952 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:32:13,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-17 00:32:14,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:32:14,162 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:32:14,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:32:14,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1062070342, now seen corresponding path program 1 times [2021-12-17 00:32:14,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:32:14,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1862172731] [2021-12-17 00:32:14,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:32:14,164 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:32:14,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:32:14,174 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:32:14,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-17 00:32:14,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:32:14,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-17 00:32:14,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:32:14,480 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 00:32:14,481 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 00:32:14,481 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:32:14,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1862172731] [2021-12-17 00:32:14,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1862172731] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 00:32:14,481 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 00:32:14,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 00:32:14,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729548225] [2021-12-17 00:32:14,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 00:32:14,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 00:32:14,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:32:14,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 00:32:14,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-12-17 00:32:14,483 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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) [2021-12-17 00:32:14,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:32:14,489 INFO L93 Difference]: Finished difference Result 56 states and 69 transitions. [2021-12-17 00:32:14,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 00:32:14,489 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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 31 [2021-12-17 00:32:14,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:32:14,490 INFO L225 Difference]: With dead ends: 56 [2021-12-17 00:32:14,490 INFO L226 Difference]: Without dead ends: 33 [2021-12-17 00:32:14,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-12-17 00:32:14,491 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 2 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 00:32:14,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 106 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 72 Unchecked, 0.0s Time] [2021-12-17 00:32:14,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-12-17 00:32:14,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-12-17 00:32:14,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-17 00:32:14,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2021-12-17 00:32:14,496 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 31 [2021-12-17 00:32:14,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:32:14,496 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2021-12-17 00:32:14,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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) [2021-12-17 00:32:14,497 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2021-12-17 00:32:14,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-17 00:32:14,497 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:32:14,497 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:32:14,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-17 00:32:14,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:32:14,708 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:32:14,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:32:14,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1662239748, now seen corresponding path program 1 times [2021-12-17 00:32:14,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:32:14,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1594746883] [2021-12-17 00:32:14,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:32:14,710 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:32:14,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:32:14,711 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:32:14,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-17 00:32:14,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:32:14,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-17 00:32:14,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:32:15,263 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 00:32:15,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:32:15,368 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:32:15,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1594746883] [2021-12-17 00:32:15,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1594746883] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:32:15,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [166026547] [2021-12-17 00:32:15,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:32:15,368 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-17 00:32:15,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-17 00:32:15,370 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-17 00:32:15,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-12-17 00:32:15,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:32:15,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-17 00:32:15,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:32:15,809 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 00:32:15,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:32:16,051 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 00:32:16,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [166026547] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:32:16,051 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 00:32:16,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 7] total 20 [2021-12-17 00:32:16,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033496040] [2021-12-17 00:32:16,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 00:32:16,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 00:32:16,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:32:16,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 00:32:16,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-12-17 00:32:16,053 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 20 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 5 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) [2021-12-17 00:32:16,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:32:16,783 INFO L93 Difference]: Finished difference Result 102 states and 130 transitions. [2021-12-17 00:32:16,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-17 00:32:16,792 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 5 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) Word has length 33 [2021-12-17 00:32:16,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:32:16,793 INFO L225 Difference]: With dead ends: 102 [2021-12-17 00:32:16,793 INFO L226 Difference]: Without dead ends: 83 [2021-12-17 00:32:16,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 83 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=215, Invalid=655, Unknown=0, NotChecked=0, Total=870 [2021-12-17 00:32:16,795 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 211 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 144 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 00:32:16,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 136 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 103 Invalid, 0 Unknown, 144 Unchecked, 0.4s Time] [2021-12-17 00:32:16,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-12-17 00:32:16,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 61. [2021-12-17 00:32:16,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 50 states have (on average 1.3) internal successors, (65), 50 states have internal predecessors, (65), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-17 00:32:16,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 79 transitions. [2021-12-17 00:32:16,810 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 79 transitions. Word has length 33 [2021-12-17 00:32:16,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:32:16,810 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 79 transitions. [2021-12-17 00:32:16,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 5 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) [2021-12-17 00:32:16,811 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 79 transitions. [2021-12-17 00:32:16,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-17 00:32:16,811 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:32:16,812 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:32:16,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-17 00:32:17,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2021-12-17 00:32:17,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-17 00:32:17,215 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:32:17,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:32:17,216 INFO L85 PathProgramCache]: Analyzing trace with hash -980983847, now seen corresponding path program 1 times [2021-12-17 00:32:17,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:32:17,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1985481763] [2021-12-17 00:32:17,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:32:17,216 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:32:17,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:32:17,218 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:32:17,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-17 00:32:17,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:32:17,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-17 00:32:17,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:32:17,622 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 00:32:17,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:32:17,886 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-17 00:32:17,886 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:32:17,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1985481763] [2021-12-17 00:32:17,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1985481763] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:32:17,886 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:32:17,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-12-17 00:32:17,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834964534] [2021-12-17 00:32:17,886 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:32:17,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-17 00:32:17,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:32:17,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-17 00:32:17,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-12-17 00:32:17,887 INFO L87 Difference]: Start difference. First operand 61 states and 79 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-17 00:32:18,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:32:18,279 INFO L93 Difference]: Finished difference Result 87 states and 110 transitions. [2021-12-17 00:32:18,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-17 00:32:18,280 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 36 [2021-12-17 00:32:18,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:32:18,282 INFO L225 Difference]: With dead ends: 87 [2021-12-17 00:32:18,282 INFO L226 Difference]: Without dead ends: 79 [2021-12-17 00:32:18,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2021-12-17 00:32:18,282 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 89 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 00:32:18,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 109 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 47 Invalid, 0 Unknown, 54 Unchecked, 0.3s Time] [2021-12-17 00:32:18,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-12-17 00:32:18,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 62. [2021-12-17 00:32:18,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 51 states have (on average 1.2941176470588236) internal successors, (66), 51 states have internal predecessors, (66), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-17 00:32:18,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 80 transitions. [2021-12-17 00:32:18,289 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 80 transitions. Word has length 36 [2021-12-17 00:32:18,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:32:18,289 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 80 transitions. [2021-12-17 00:32:18,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-17 00:32:18,289 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 80 transitions. [2021-12-17 00:32:18,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-17 00:32:18,290 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:32:18,290 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:32:18,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-17 00:32:18,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:32:18,504 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:32:18,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:32:18,505 INFO L85 PathProgramCache]: Analyzing trace with hash -2124903680, now seen corresponding path program 2 times [2021-12-17 00:32:18,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:32:18,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1985570311] [2021-12-17 00:32:18,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 00:32:18,506 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:32:18,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:32:18,507 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:32:18,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-17 00:32:18,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 00:32:18,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:32:18,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-17 00:32:18,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:32:18,915 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-17 00:32:18,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:32:19,083 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-17 00:32:19,083 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:32:19,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1985570311] [2021-12-17 00:32:19,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1985570311] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:32:19,083 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:32:19,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-12-17 00:32:19,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551497688] [2021-12-17 00:32:19,084 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:32:19,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-17 00:32:19,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:32:19,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-17 00:32:19,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-12-17 00:32:19,085 INFO L87 Difference]: Start difference. First operand 62 states and 80 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 2 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-17 00:32:19,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:32:19,258 INFO L93 Difference]: Finished difference Result 110 states and 141 transitions. [2021-12-17 00:32:19,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-17 00:32:19,259 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 2 states have call predecessors, (6), 4 states have call successors, (6) Word has length 37 [2021-12-17 00:32:19,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:32:19,260 INFO L225 Difference]: With dead ends: 110 [2021-12-17 00:32:19,260 INFO L226 Difference]: Without dead ends: 106 [2021-12-17 00:32:19,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-12-17 00:32:19,261 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 44 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 00:32:19,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 90 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 24 Invalid, 0 Unknown, 51 Unchecked, 0.1s Time] [2021-12-17 00:32:19,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-12-17 00:32:19,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 66. [2021-12-17 00:32:19,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 55 states have (on average 1.290909090909091) internal successors, (71), 55 states have internal predecessors, (71), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-17 00:32:19,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 85 transitions. [2021-12-17 00:32:19,269 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 85 transitions. Word has length 37 [2021-12-17 00:32:19,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:32:19,269 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 85 transitions. [2021-12-17 00:32:19,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 2 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-17 00:32:19,271 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 85 transitions. [2021-12-17 00:32:19,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-17 00:32:19,272 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:32:19,272 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:32:19,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-17 00:32:19,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:32:19,479 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:32:19,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:32:19,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1360716990, now seen corresponding path program 1 times [2021-12-17 00:32:19,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:32:19,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1692668593] [2021-12-17 00:32:19,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:32:19,479 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:32:19,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:32:19,480 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:32:19,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-17 00:32:19,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:32:19,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-17 00:32:19,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:32:20,019 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 00:32:20,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:32:20,611 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 00:32:20,611 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:32:20,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1692668593] [2021-12-17 00:32:20,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1692668593] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:32:20,611 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:32:20,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 24 [2021-12-17 00:32:20,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715067932] [2021-12-17 00:32:20,611 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:32:20,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-17 00:32:20,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:32:20,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-17 00:32:20,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=400, Unknown=0, NotChecked=0, Total=552 [2021-12-17 00:32:20,613 INFO L87 Difference]: Start difference. First operand 66 states and 85 transitions. Second operand has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 states have internal predecessors, (43), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-17 00:32:23,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:32:23,163 INFO L93 Difference]: Finished difference Result 140 states and 186 transitions. [2021-12-17 00:32:23,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-17 00:32:23,164 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 states have internal predecessors, (43), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 37 [2021-12-17 00:32:23,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:32:23,166 INFO L225 Difference]: With dead ends: 140 [2021-12-17 00:32:23,166 INFO L226 Difference]: Without dead ends: 108 [2021-12-17 00:32:23,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=441, Invalid=1281, Unknown=0, NotChecked=0, Total=1722 [2021-12-17 00:32:23,167 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 29 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 136 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-17 00:32:23,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 176 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 163 Invalid, 0 Unknown, 136 Unchecked, 0.8s Time] [2021-12-17 00:32:23,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-12-17 00:32:23,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 99. [2021-12-17 00:32:23,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 88 states have (on average 1.3409090909090908) internal successors, (118), 88 states have internal predecessors, (118), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-17 00:32:23,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 132 transitions. [2021-12-17 00:32:23,194 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 132 transitions. Word has length 37 [2021-12-17 00:32:23,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:32:23,194 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 132 transitions. [2021-12-17 00:32:23,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 states have internal predecessors, (43), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-17 00:32:23,195 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 132 transitions. [2021-12-17 00:32:23,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-17 00:32:23,197 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:32:23,197 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:32:23,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-12-17 00:32:23,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:32:23,406 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:32:23,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:32:23,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1967381381, now seen corresponding path program 1 times [2021-12-17 00:32:23,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:32:23,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [43775460] [2021-12-17 00:32:23,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:32:23,407 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:32:23,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:32:23,410 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:32:23,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-17 00:32:23,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:32:23,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-17 00:32:23,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:32:23,750 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 15 treesize of output 11 [2021-12-17 00:32:24,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 00:32:24,786 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 00:32:24,786 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 1 case distinctions, treesize of input 47 treesize of output 33 [2021-12-17 00:32:25,030 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 16 treesize of output 8 [2021-12-17 00:32:25,213 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 00:32:25,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:32:41,199 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:32:41,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [43775460] [2021-12-17 00:32:41,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [43775460] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:32:41,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [662942406] [2021-12-17 00:32:41,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:32:41,200 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-17 00:32:41,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-17 00:32:41,201 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-17 00:32:41,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-12-17 00:32:41,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:32:41,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-17 00:32:41,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:32:44,574 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 15 treesize of output 11 [2021-12-17 00:32:49,328 INFO L354 Elim1Store]: treesize reduction 61, result has 10.3 percent of original size [2021-12-17 00:32:49,328 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 2 case distinctions, treesize of input 47 treesize of output 30 [2021-12-17 00:32:50,062 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 16 treesize of output 8 [2021-12-17 00:32:50,234 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 00:32:50,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:32:59,933 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 31 treesize of output 29 [2021-12-17 00:32:59,946 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 60 treesize of output 58 [2021-12-17 00:33:10,999 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 00:33:10,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [662942406] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:33:10,999 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 00:33:11,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 14, 12] total 40 [2021-12-17 00:33:11,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668302879] [2021-12-17 00:33:11,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 00:33:11,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-17 00:33:11,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:33:11,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-17 00:33:11,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=1337, Unknown=1, NotChecked=0, Total=1640 [2021-12-17 00:33:11,001 INFO L87 Difference]: Start difference. First operand 99 states and 132 transitions. Second operand has 40 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 36 states have internal predecessors, (73), 6 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2021-12-17 00:33:13,229 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 00:33:21,704 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 00:33:28,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:33:28,357 INFO L93 Difference]: Finished difference Result 162 states and 217 transitions. [2021-12-17 00:33:28,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-17 00:33:28,365 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 36 states have internal predecessors, (73), 6 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) Word has length 38 [2021-12-17 00:33:28,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:33:28,366 INFO L225 Difference]: With dead ends: 162 [2021-12-17 00:33:28,366 INFO L226 Difference]: Without dead ends: 156 [2021-12-17 00:33:28,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 77 SyntacticMatches, 9 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 941 ImplicationChecksByTransitivity, 47.8s TimeCoverageRelationStatistics Valid=347, Invalid=1722, Unknown=1, NotChecked=0, Total=2070 [2021-12-17 00:33:28,367 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 88 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 190 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2021-12-17 00:33:28,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 318 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 160 Invalid, 0 Unknown, 190 Unchecked, 8.3s Time] [2021-12-17 00:33:28,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-12-17 00:33:28,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 146. [2021-12-17 00:33:28,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 128 states have (on average 1.359375) internal successors, (174), 128 states have internal predecessors, (174), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-17 00:33:28,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 200 transitions. [2021-12-17 00:33:28,382 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 200 transitions. Word has length 38 [2021-12-17 00:33:28,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:33:28,383 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 200 transitions. [2021-12-17 00:33:28,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 36 states have internal predecessors, (73), 6 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2021-12-17 00:33:28,383 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 200 transitions. [2021-12-17 00:33:28,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-17 00:33:28,384 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:33:28,384 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:33:28,388 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (11)] Ended with exit code 0 [2021-12-17 00:33:28,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-12-17 00:33:28,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:33:28,796 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:33:28,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:33:28,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1291056626, now seen corresponding path program 2 times [2021-12-17 00:33:28,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:33:28,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1439290991] [2021-12-17 00:33:28,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 00:33:28,797 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:33:28,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:33:28,798 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:33:28,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-17 00:33:28,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 00:33:28,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:33:28,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-17 00:33:28,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:33:29,198 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 00:33:29,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:33:29,389 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-17 00:33:29,390 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:33:29,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1439290991] [2021-12-17 00:33:29,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1439290991] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:33:29,390 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:33:29,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-12-17 00:33:29,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647640564] [2021-12-17 00:33:29,390 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:33:29,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-17 00:33:29,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:33:29,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-17 00:33:29,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-12-17 00:33:29,391 INFO L87 Difference]: Start difference. First operand 146 states and 200 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 2 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-17 00:33:29,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:33:29,580 INFO L93 Difference]: Finished difference Result 150 states and 203 transitions. [2021-12-17 00:33:29,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 00:33:29,593 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 2 states have call predecessors, (6), 4 states have call successors, (6) Word has length 38 [2021-12-17 00:33:29,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:33:29,594 INFO L225 Difference]: With dead ends: 150 [2021-12-17 00:33:29,594 INFO L226 Difference]: Without dead ends: 146 [2021-12-17 00:33:29,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-12-17 00:33:29,594 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 18 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 00:33:29,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 74 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 38 Unchecked, 0.2s Time] [2021-12-17 00:33:29,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-12-17 00:33:29,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 142. [2021-12-17 00:33:29,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 124 states have (on average 1.346774193548387) internal successors, (167), 124 states have internal predecessors, (167), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-17 00:33:29,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 193 transitions. [2021-12-17 00:33:29,614 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 193 transitions. Word has length 38 [2021-12-17 00:33:29,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:33:29,614 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 193 transitions. [2021-12-17 00:33:29,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 2 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-17 00:33:29,615 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 193 transitions. [2021-12-17 00:33:29,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-17 00:33:29,616 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:33:29,616 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:33:29,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-12-17 00:33:29,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:33:29,825 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:33:29,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:33:29,825 INFO L85 PathProgramCache]: Analyzing trace with hash -707639139, now seen corresponding path program 2 times [2021-12-17 00:33:29,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:33:29,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [585205153] [2021-12-17 00:33:29,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 00:33:29,826 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:33:29,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:33:29,827 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:33:29,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-17 00:33:29,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 00:33:29,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:33:29,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-17 00:33:29,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:33:30,424 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 00:33:30,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:33:30,711 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-17 00:33:30,711 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:33:30,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [585205153] [2021-12-17 00:33:30,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [585205153] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:33:30,711 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:33:30,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 16 [2021-12-17 00:33:30,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742870757] [2021-12-17 00:33:30,711 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:33:30,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-17 00:33:30,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:33:30,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-17 00:33:30,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-12-17 00:33:30,712 INFO L87 Difference]: Start difference. First operand 142 states and 193 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-17 00:33:30,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:33:30,966 INFO L93 Difference]: Finished difference Result 154 states and 207 transitions. [2021-12-17 00:33:30,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-17 00:33:30,977 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 40 [2021-12-17 00:33:30,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:33:30,978 INFO L225 Difference]: With dead ends: 154 [2021-12-17 00:33:30,978 INFO L226 Difference]: Without dead ends: 150 [2021-12-17 00:33:30,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-12-17 00:33:30,979 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 16 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 00:33:30,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 90 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 49 Unchecked, 0.2s Time] [2021-12-17 00:33:30,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-12-17 00:33:30,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 137. [2021-12-17 00:33:30,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 119 states have (on average 1.3361344537815125) internal successors, (159), 119 states have internal predecessors, (159), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-17 00:33:30,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 185 transitions. [2021-12-17 00:33:30,989 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 185 transitions. Word has length 40 [2021-12-17 00:33:30,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:33:30,990 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 185 transitions. [2021-12-17 00:33:30,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-17 00:33:30,990 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 185 transitions. [2021-12-17 00:33:30,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-17 00:33:30,991 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:33:30,991 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:33:31,000 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-12-17 00:33:31,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:33:31,200 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:33:31,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:33:31,200 INFO L85 PathProgramCache]: Analyzing trace with hash 2039013503, now seen corresponding path program 1 times [2021-12-17 00:33:31,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:33:31,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1349403156] [2021-12-17 00:33:31,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:33:31,201 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:33:31,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:33:31,202 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:33:31,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-17 00:33:31,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:33:31,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-17 00:33:31,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:33:31,702 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 00:33:31,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:33:32,016 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-17 00:33:32,016 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:33:32,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1349403156] [2021-12-17 00:33:32,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1349403156] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:33:32,016 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:33:32,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 16 [2021-12-17 00:33:32,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851225750] [2021-12-17 00:33:32,016 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:33:32,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-17 00:33:32,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:33:32,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-17 00:33:32,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-12-17 00:33:32,017 INFO L87 Difference]: Start difference. First operand 137 states and 185 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-17 00:33:32,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:33:32,423 INFO L93 Difference]: Finished difference Result 185 states and 250 transitions. [2021-12-17 00:33:32,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 00:33:32,424 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 41 [2021-12-17 00:33:32,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:33:32,425 INFO L225 Difference]: With dead ends: 185 [2021-12-17 00:33:32,425 INFO L226 Difference]: Without dead ends: 101 [2021-12-17 00:33:32,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-12-17 00:33:32,426 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 17 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 00:33:32,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 122 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 76 Invalid, 0 Unknown, 46 Unchecked, 0.4s Time] [2021-12-17 00:33:32,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-12-17 00:33:32,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 98. [2021-12-17 00:33:32,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 87 states have (on average 1.2988505747126438) internal successors, (113), 87 states have internal predecessors, (113), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-17 00:33:32,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 127 transitions. [2021-12-17 00:33:32,433 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 127 transitions. Word has length 41 [2021-12-17 00:33:32,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:33:32,433 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 127 transitions. [2021-12-17 00:33:32,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-17 00:33:32,433 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 127 transitions. [2021-12-17 00:33:32,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-17 00:33:32,434 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:33:32,434 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:33:32,445 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-12-17 00:33:32,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:33:32,646 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:33:32,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:33:32,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1159073567, now seen corresponding path program 1 times [2021-12-17 00:33:32,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:33:32,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [753739903] [2021-12-17 00:33:32,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:33:32,647 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:33:32,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:33:32,648 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:33:32,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-17 00:33:32,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:33:32,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-17 00:33:32,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:33:33,115 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 00:33:33,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:33:33,451 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-17 00:33:33,451 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:33:33,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [753739903] [2021-12-17 00:33:33,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [753739903] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:33:33,452 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:33:33,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-12-17 00:33:33,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215855328] [2021-12-17 00:33:33,452 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:33:33,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-17 00:33:33,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:33:33,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-17 00:33:33,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2021-12-17 00:33:33,453 INFO L87 Difference]: Start difference. First operand 98 states and 127 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 3 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-17 00:33:34,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:33:34,050 INFO L93 Difference]: Finished difference Result 186 states and 244 transitions. [2021-12-17 00:33:34,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-17 00:33:34,061 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 3 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 41 [2021-12-17 00:33:34,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:33:34,061 INFO L225 Difference]: With dead ends: 186 [2021-12-17 00:33:34,062 INFO L226 Difference]: Without dead ends: 152 [2021-12-17 00:33:34,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=189, Invalid=411, Unknown=0, NotChecked=0, Total=600 [2021-12-17 00:33:34,062 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 130 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 00:33:34,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 149 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 78 Invalid, 0 Unknown, 132 Unchecked, 0.3s Time] [2021-12-17 00:33:34,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-12-17 00:33:34,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 102. [2021-12-17 00:33:34,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 91 states have (on average 1.2527472527472527) internal successors, (114), 92 states have internal predecessors, (114), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-17 00:33:34,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 126 transitions. [2021-12-17 00:33:34,069 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 126 transitions. Word has length 41 [2021-12-17 00:33:34,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:33:34,069 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 126 transitions. [2021-12-17 00:33:34,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 3 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-17 00:33:34,069 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 126 transitions. [2021-12-17 00:33:34,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-17 00:33:34,070 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:33:34,070 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:33:34,081 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-12-17 00:33:34,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:33:34,279 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:33:34,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:33:34,279 INFO L85 PathProgramCache]: Analyzing trace with hash -967924134, now seen corresponding path program 3 times [2021-12-17 00:33:34,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:33:34,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [288615558] [2021-12-17 00:33:34,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 00:33:34,280 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:33:34,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:33:34,280 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:33:34,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-17 00:33:34,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-17 00:33:34,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:33:34,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-17 00:33:34,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:33:34,934 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 00:33:34,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:33:35,272 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 00:33:35,272 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:33:35,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [288615558] [2021-12-17 00:33:35,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [288615558] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:33:35,272 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:33:35,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 18 [2021-12-17 00:33:35,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296069684] [2021-12-17 00:33:35,273 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:33:35,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-17 00:33:35,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:33:35,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-17 00:33:35,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-12-17 00:33:35,273 INFO L87 Difference]: Start difference. First operand 102 states and 126 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-17 00:33:35,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:33:35,654 INFO L93 Difference]: Finished difference Result 150 states and 183 transitions. [2021-12-17 00:33:35,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-17 00:33:35,664 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 43 [2021-12-17 00:33:35,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:33:35,665 INFO L225 Difference]: With dead ends: 150 [2021-12-17 00:33:35,665 INFO L226 Difference]: Without dead ends: 122 [2021-12-17 00:33:35,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-12-17 00:33:35,668 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 56 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 00:33:35,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 155 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 89 Invalid, 0 Unknown, 92 Unchecked, 0.3s Time] [2021-12-17 00:33:35,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-12-17 00:33:35,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 116. [2021-12-17 00:33:35,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 103 states have (on average 1.2524271844660195) internal successors, (129), 105 states have internal predecessors, (129), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-17 00:33:35,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 143 transitions. [2021-12-17 00:33:35,676 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 143 transitions. Word has length 43 [2021-12-17 00:33:35,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:33:35,676 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 143 transitions. [2021-12-17 00:33:35,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-17 00:33:35,676 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 143 transitions. [2021-12-17 00:33:35,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-17 00:33:35,678 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:33:35,678 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:33:35,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-12-17 00:33:35,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:33:35,888 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:33:35,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:33:35,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1355380159, now seen corresponding path program 2 times [2021-12-17 00:33:35,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:33:35,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1120792125] [2021-12-17 00:33:35,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 00:33:35,889 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:33:35,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:33:35,890 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:33:35,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-17 00:33:36,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 00:33:36,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:33:36,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-17 00:33:36,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:33:36,616 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-17 00:33:36,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:33:36,914 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-17 00:33:36,915 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:33:36,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1120792125] [2021-12-17 00:33:36,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1120792125] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:33:36,915 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:33:36,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 16 [2021-12-17 00:33:36,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093971942] [2021-12-17 00:33:36,915 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:33:36,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-17 00:33:36,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:33:36,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-17 00:33:36,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-12-17 00:33:36,916 INFO L87 Difference]: Start difference. First operand 116 states and 143 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 16 states have internal predecessors, (59), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-17 00:33:37,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:33:37,159 INFO L93 Difference]: Finished difference Result 163 states and 201 transitions. [2021-12-17 00:33:37,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 00:33:37,171 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 16 states have internal predecessors, (59), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 45 [2021-12-17 00:33:37,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:33:37,172 INFO L225 Difference]: With dead ends: 163 [2021-12-17 00:33:37,172 INFO L226 Difference]: Without dead ends: 152 [2021-12-17 00:33:37,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2021-12-17 00:33:37,173 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 33 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 00:33:37,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 160 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 48 Unchecked, 0.1s Time] [2021-12-17 00:33:37,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-12-17 00:33:37,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 139. [2021-12-17 00:33:37,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 120 states have (on average 1.2416666666666667) internal successors, (149), 122 states have internal predecessors, (149), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-17 00:33:37,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 171 transitions. [2021-12-17 00:33:37,183 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 171 transitions. Word has length 45 [2021-12-17 00:33:37,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:33:37,184 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 171 transitions. [2021-12-17 00:33:37,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 16 states have internal predecessors, (59), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-17 00:33:37,184 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 171 transitions. [2021-12-17 00:33:37,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-17 00:33:37,185 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:33:37,185 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:33:37,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-12-17 00:33:37,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:33:37,390 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:33:37,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:33:37,391 INFO L85 PathProgramCache]: Analyzing trace with hash 768574145, now seen corresponding path program 4 times [2021-12-17 00:33:37,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:33:37,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [76538904] [2021-12-17 00:33:37,391 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 00:33:37,391 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:33:37,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:33:37,411 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:33:37,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-12-17 00:33:37,591 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 00:33:37,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:33:37,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-17 00:33:37,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:33:38,081 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 00:33:38,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:33:38,508 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-17 00:33:38,509 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:33:38,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [76538904] [2021-12-17 00:33:38,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [76538904] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:33:38,509 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:33:38,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2021-12-17 00:33:38,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117120611] [2021-12-17 00:33:38,509 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:33:38,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 00:33:38,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:33:38,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 00:33:38,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2021-12-17 00:33:38,511 INFO L87 Difference]: Start difference. First operand 139 states and 171 transitions. Second operand has 20 states, 20 states have (on average 2.6) internal successors, (52), 20 states have internal predecessors, (52), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-17 00:33:39,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:33:39,264 INFO L93 Difference]: Finished difference Result 245 states and 312 transitions. [2021-12-17 00:33:39,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-17 00:33:39,286 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.6) internal successors, (52), 20 states have internal predecessors, (52), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 45 [2021-12-17 00:33:39,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:33:39,287 INFO L225 Difference]: With dead ends: 245 [2021-12-17 00:33:39,287 INFO L226 Difference]: Without dead ends: 187 [2021-12-17 00:33:39,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2021-12-17 00:33:39,291 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 47 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 00:33:39,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 157 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 82 Invalid, 0 Unknown, 77 Unchecked, 0.4s Time] [2021-12-17 00:33:39,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-12-17 00:33:39,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 151. [2021-12-17 00:33:39,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 132 states have (on average 1.2424242424242424) internal successors, (164), 134 states have internal predecessors, (164), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-17 00:33:39,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 186 transitions. [2021-12-17 00:33:39,303 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 186 transitions. Word has length 45 [2021-12-17 00:33:39,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:33:39,303 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 186 transitions. [2021-12-17 00:33:39,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.6) internal successors, (52), 20 states have internal predecessors, (52), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-17 00:33:39,304 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 186 transitions. [2021-12-17 00:33:39,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-17 00:33:39,304 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:33:39,304 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:33:39,316 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-12-17 00:33:39,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:33:39,514 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:33:39,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:33:39,515 INFO L85 PathProgramCache]: Analyzing trace with hash -145492289, now seen corresponding path program 5 times [2021-12-17 00:33:39,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:33:39,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [376765185] [2021-12-17 00:33:39,515 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 00:33:39,515 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:33:39,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:33:39,516 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:33:39,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-12-17 00:33:39,650 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-12-17 00:33:39,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:33:39,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-17 00:33:39,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:33:39,929 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 00:33:39,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:33:40,176 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-17 00:33:40,176 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:33:40,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [376765185] [2021-12-17 00:33:40,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [376765185] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:33:40,176 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:33:40,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 18 [2021-12-17 00:33:40,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315207290] [2021-12-17 00:33:40,176 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:33:40,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-17 00:33:40,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:33:40,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-17 00:33:40,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-12-17 00:33:40,177 INFO L87 Difference]: Start difference. First operand 151 states and 186 transitions. Second operand has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-17 00:33:40,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:33:40,973 INFO L93 Difference]: Finished difference Result 288 states and 358 transitions. [2021-12-17 00:33:40,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-17 00:33:40,977 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 47 [2021-12-17 00:33:40,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:33:40,977 INFO L225 Difference]: With dead ends: 288 [2021-12-17 00:33:40,978 INFO L226 Difference]: Without dead ends: 185 [2021-12-17 00:33:40,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2021-12-17 00:33:40,978 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 139 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 00:33:40,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 165 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 00:33:40,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-12-17 00:33:41,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 135. [2021-12-17 00:33:41,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 122 states have (on average 1.180327868852459) internal successors, (144), 124 states have internal predecessors, (144), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-17 00:33:41,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 158 transitions. [2021-12-17 00:33:41,002 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 158 transitions. Word has length 47 [2021-12-17 00:33:41,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:33:41,003 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 158 transitions. [2021-12-17 00:33:41,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-17 00:33:41,003 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 158 transitions. [2021-12-17 00:33:41,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-17 00:33:41,004 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:33:41,008 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:33:41,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-12-17 00:33:41,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:33:41,217 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:33:41,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:33:41,218 INFO L85 PathProgramCache]: Analyzing trace with hash -4709032, now seen corresponding path program 3 times [2021-12-17 00:33:41,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:33:41,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [499033683] [2021-12-17 00:33:41,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 00:33:41,218 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:33:41,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:33:41,219 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:33:41,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-12-17 00:33:41,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-17 00:33:41,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:33:41,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-17 00:33:41,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:33:42,038 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 21 treesize of output 17 [2021-12-17 00:33:42,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:33:42,403 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 34 treesize of output 33 [2021-12-17 00:33:43,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:33:43,221 INFO L354 Elim1Store]: treesize reduction 107, result has 34.4 percent of original size [2021-12-17 00:33:43,221 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 3 case distinctions, treesize of input 55 treesize of output 79 [2021-12-17 00:33:43,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:33:43,787 INFO L354 Elim1Store]: treesize reduction 62, result has 21.5 percent of original size [2021-12-17 00:33:43,788 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 3 case distinctions, treesize of input 41 treesize of output 43 [2021-12-17 00:33:48,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:34:00,406 WARN L227 SmtUtils]: Spent 12.35s on a formula simplification. DAG size of input: 51 DAG size of output: 37 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-12-17 00:34:00,407 INFO L354 Elim1Store]: treesize reduction 90, result has 55.9 percent of original size [2021-12-17 00:34:00,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 142 Killed by 15