./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3dbbec33 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/nla-digbench-scaling/prodbin-ll_valuebound10.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 ca6b6f09277139d829682a6458fdcdacf72411331aa404fd46248e3dcb9a9e7f --- Real Ultimate output --- This is Ultimate 0.2.2-?-3dbbec3 [2023-02-14 12:51:40,303 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-14 12:51:40,305 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-14 12:51:40,339 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-14 12:51:40,340 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-14 12:51:40,343 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-14 12:51:40,344 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-14 12:51:40,346 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-14 12:51:40,350 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-14 12:51:40,353 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-14 12:51:40,354 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-14 12:51:40,355 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-14 12:51:40,355 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-14 12:51:40,356 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-14 12:51:40,356 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-14 12:51:40,357 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-14 12:51:40,357 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-14 12:51:40,358 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-14 12:51:40,359 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-14 12:51:40,360 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-14 12:51:40,361 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-14 12:51:40,364 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-14 12:51:40,366 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-14 12:51:40,367 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-14 12:51:40,375 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-14 12:51:40,377 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-14 12:51:40,377 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-14 12:51:40,378 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-14 12:51:40,378 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-14 12:51:40,379 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-14 12:51:40,379 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-14 12:51:40,380 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-14 12:51:40,380 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-14 12:51:40,381 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-14 12:51:40,381 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-14 12:51:40,382 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-14 12:51:40,382 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-14 12:51:40,383 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-14 12:51:40,383 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-14 12:51:40,389 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-14 12:51:40,391 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-14 12:51:40,392 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-14 12:51:40,432 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-14 12:51:40,433 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-14 12:51:40,433 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-14 12:51:40,433 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-14 12:51:40,434 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-14 12:51:40,434 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-14 12:51:40,435 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-14 12:51:40,436 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-14 12:51:40,436 INFO L138 SettingsManager]: * Use SBE=true [2023-02-14 12:51:40,436 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-14 12:51:40,437 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-14 12:51:40,437 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-14 12:51:40,437 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-14 12:51:40,437 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-14 12:51:40,438 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-14 12:51:40,438 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-14 12:51:40,438 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-14 12:51:40,438 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-14 12:51:40,438 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-14 12:51:40,439 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-14 12:51:40,439 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-14 12:51:40,439 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-14 12:51:40,439 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-14 12:51:40,439 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-14 12:51:40,440 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 12:51:40,440 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-14 12:51:40,440 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-14 12:51:40,440 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-14 12:51:40,440 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-14 12:51:40,441 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-14 12:51:40,441 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-14 12:51:40,441 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-14 12:51:40,441 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-14 12:51:40,441 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-14 12:51:40,442 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-14 12:51:40,442 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ca6b6f09277139d829682a6458fdcdacf72411331aa404fd46248e3dcb9a9e7f [2023-02-14 12:51:40,652 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-14 12:51:40,674 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-14 12:51:40,677 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-14 12:51:40,678 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-14 12:51:40,678 INFO L275 PluginConnector]: CDTParser initialized [2023-02-14 12:51:40,679 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound10.c [2023-02-14 12:51:41,825 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-14 12:51:41,981 INFO L351 CDTParser]: Found 1 translation units. [2023-02-14 12:51:41,982 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound10.c [2023-02-14 12:51:41,986 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c943e5664/45ab0e20a636434584ba61fcfc3a59d9/FLAGa5e55721e [2023-02-14 12:51:42,001 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c943e5664/45ab0e20a636434584ba61fcfc3a59d9 [2023-02-14 12:51:42,003 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-14 12:51:42,005 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-14 12:51:42,007 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-14 12:51:42,007 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-14 12:51:42,010 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-14 12:51:42,010 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 12:51:42" (1/1) ... [2023-02-14 12:51:42,011 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@730f4d8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:51:42, skipping insertion in model container [2023-02-14 12:51:42,011 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 12:51:42" (1/1) ... [2023-02-14 12:51:42,017 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-14 12:51:42,027 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-14 12:51:42,136 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound10.c[537,550] [2023-02-14 12:51:42,155 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 12:51:42,165 INFO L203 MainTranslator]: Completed pre-run [2023-02-14 12:51:42,174 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound10.c[537,550] [2023-02-14 12:51:42,178 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 12:51:42,187 INFO L208 MainTranslator]: Completed translation [2023-02-14 12:51:42,187 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:51:42 WrapperNode [2023-02-14 12:51:42,187 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-14 12:51:42,188 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-14 12:51:42,188 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-14 12:51:42,188 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-14 12:51:42,192 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:51:42" (1/1) ... [2023-02-14 12:51:42,198 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:51:42" (1/1) ... [2023-02-14 12:51:42,211 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 42 [2023-02-14 12:51:42,211 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-14 12:51:42,212 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-14 12:51:42,212 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-14 12:51:42,212 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-14 12:51:42,218 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:51:42" (1/1) ... [2023-02-14 12:51:42,219 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:51:42" (1/1) ... [2023-02-14 12:51:42,220 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:51:42" (1/1) ... [2023-02-14 12:51:42,220 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:51:42" (1/1) ... [2023-02-14 12:51:42,222 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:51:42" (1/1) ... [2023-02-14 12:51:42,225 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:51:42" (1/1) ... [2023-02-14 12:51:42,226 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:51:42" (1/1) ... [2023-02-14 12:51:42,226 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:51:42" (1/1) ... [2023-02-14 12:51:42,227 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-14 12:51:42,228 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-14 12:51:42,228 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-14 12:51:42,228 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-14 12:51:42,229 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:51:42" (1/1) ... [2023-02-14 12:51:42,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 12:51:42,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 12:51:42,255 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) [2023-02-14 12:51:42,282 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 [2023-02-14 12:51:42,297 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-14 12:51:42,297 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-14 12:51:42,297 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-14 12:51:42,297 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-14 12:51:42,297 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-14 12:51:42,298 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-14 12:51:42,298 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-14 12:51:42,298 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-14 12:51:42,351 INFO L235 CfgBuilder]: Building ICFG [2023-02-14 12:51:42,353 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-14 12:51:42,474 INFO L276 CfgBuilder]: Performing block encoding [2023-02-14 12:51:42,479 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-14 12:51:42,479 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2023-02-14 12:51:42,481 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 12:51:42 BoogieIcfgContainer [2023-02-14 12:51:42,481 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-14 12:51:42,483 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-14 12:51:42,483 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-14 12:51:42,485 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-14 12:51:42,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 12:51:42" (1/3) ... [2023-02-14 12:51:42,486 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16d23fa2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 12:51:42, skipping insertion in model container [2023-02-14 12:51:42,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:51:42" (2/3) ... [2023-02-14 12:51:42,487 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16d23fa2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 12:51:42, skipping insertion in model container [2023-02-14 12:51:42,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 12:51:42" (3/3) ... [2023-02-14 12:51:42,488 INFO L112 eAbstractionObserver]: Analyzing ICFG prodbin-ll_valuebound10.c [2023-02-14 12:51:42,501 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-14 12:51:42,502 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-14 12:51:42,587 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-14 12:51:42,593 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@9d48eff, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-14 12:51:42,593 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-14 12:51:42,609 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 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) [2023-02-14 12:51:42,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-14 12:51:42,616 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 12:51:42,617 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 12:51:42,617 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 12:51:42,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 12:51:42,621 INFO L85 PathProgramCache]: Analyzing trace with hash -861605892, now seen corresponding path program 1 times [2023-02-14 12:51:42,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 12:51:42,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388848079] [2023-02-14 12:51:42,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:51:42,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 12:51:42,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 12:51:42,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 12:51:42,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388848079] [2023-02-14 12:51:42,793 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-14 12:51:42,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209252428] [2023-02-14 12:51:42,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:51:42,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 12:51:42,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 12:51:42,797 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) [2023-02-14 12:51:42,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-14 12:51:42,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 12:51:42,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-14 12:51:42,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 12:51:42,908 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-14 12:51:42,908 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 12:51:42,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209252428] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 12:51:42,910 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 12:51:42,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-14 12:51:42,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099601982] [2023-02-14 12:51:42,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 12:51:42,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-14 12:51:42,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 12:51:42,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-14 12:51:42,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-14 12:51:42,966 INFO L87 Difference]: Start difference. First operand has 27 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 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) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 12:51:42,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 12:51:42,990 INFO L93 Difference]: Finished difference Result 51 states and 71 transitions. [2023-02-14 12:51:42,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-14 12:51:42,993 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), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2023-02-14 12:51:42,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 12:51:42,999 INFO L225 Difference]: With dead ends: 51 [2023-02-14 12:51:42,999 INFO L226 Difference]: Without dead ends: 23 [2023-02-14 12:51:43,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-14 12:51:43,008 INFO L413 NwaCegarLoop]: 31 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, 31 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 [2023-02-14 12:51:43,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 12:51:43,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-02-14 12:51:43,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-02-14 12:51:43,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-14 12:51:43,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2023-02-14 12:51:43,043 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 24 [2023-02-14 12:51:43,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 12:51:43,044 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2023-02-14 12:51:43,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 12:51:43,045 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2023-02-14 12:51:43,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-14 12:51:43,047 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 12:51:43,047 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 12:51:43,055 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-14 12:51:43,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-02-14 12:51:43,253 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 12:51:43,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 12:51:43,254 INFO L85 PathProgramCache]: Analyzing trace with hash -2010313222, now seen corresponding path program 1 times [2023-02-14 12:51:43,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 12:51:43,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708184944] [2023-02-14 12:51:43,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:51:43,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 12:51:43,282 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 12:51:43,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [707863880] [2023-02-14 12:51:43,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:51:43,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 12:51:43,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 12:51:43,289 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) [2023-02-14 12:51:43,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-14 12:51:43,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 12:51:43,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-14 12:51:43,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 12:51:43,435 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-14 12:51:43,435 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 12:51:43,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 12:51:43,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708184944] [2023-02-14 12:51:43,436 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 12:51:43,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707863880] [2023-02-14 12:51:43,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707863880] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 12:51:43,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 12:51:43,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-14 12:51:43,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708590354] [2023-02-14 12:51:43,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 12:51:43,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 12:51:43,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 12:51:43,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 12:51:43,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-14 12:51:43,441 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 12:51:43,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 12:51:43,529 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2023-02-14 12:51:43,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-14 12:51:43,530 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2023-02-14 12:51:43,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 12:51:43,531 INFO L225 Difference]: With dead ends: 35 [2023-02-14 12:51:43,531 INFO L226 Difference]: Without dead ends: 33 [2023-02-14 12:51:43,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-14 12:51:43,533 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 8 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 12:51:43,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 71 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 12:51:43,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-02-14 12:51:43,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2023-02-14 12:51:43,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 21 states have internal predecessors, (22), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-14 12:51:43,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2023-02-14 12:51:43,540 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 24 [2023-02-14 12:51:43,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 12:51:43,541 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2023-02-14 12:51:43,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 12:51:43,542 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2023-02-14 12:51:43,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-14 12:51:43,542 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 12:51:43,543 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 12:51:43,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-14 12:51:43,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-02-14 12:51:43,744 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 12:51:43,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 12:51:43,744 INFO L85 PathProgramCache]: Analyzing trace with hash -895979555, now seen corresponding path program 1 times [2023-02-14 12:51:43,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 12:51:43,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718118504] [2023-02-14 12:51:43,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:51:43,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 12:51:43,759 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 12:51:43,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [699080652] [2023-02-14 12:51:43,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:51:43,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 12:51:43,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 12:51:43,767 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) [2023-02-14 12:51:43,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-14 12:51:43,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 12:51:43,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-14 12:51:43,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 12:51:43,897 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 12:51:43,899 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 12:51:43,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 12:51:43,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718118504] [2023-02-14 12:51:43,900 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 12:51:43,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699080652] [2023-02-14 12:51:43,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699080652] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 12:51:43,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 12:51:43,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-14 12:51:43,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843013228] [2023-02-14 12:51:43,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 12:51:43,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-14 12:51:43,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 12:51:43,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-14 12:51:43,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-14 12:51:43,905 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-14 12:51:44,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 12:51:44,010 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2023-02-14 12:51:44,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 12:51:44,011 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2023-02-14 12:51:44,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 12:51:44,012 INFO L225 Difference]: With dead ends: 39 [2023-02-14 12:51:44,012 INFO L226 Difference]: Without dead ends: 32 [2023-02-14 12:51:44,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-02-14 12:51:44,014 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 15 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 12:51:44,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 69 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 12:51:44,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-02-14 12:51:44,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2023-02-14 12:51:44,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-14 12:51:44,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2023-02-14 12:51:44,020 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 30 [2023-02-14 12:51:44,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 12:51:44,021 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2023-02-14 12:51:44,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-14 12:51:44,021 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2023-02-14 12:51:44,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-14 12:51:44,022 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 12:51:44,022 INFO L195 NwaCegarLoop]: 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] [2023-02-14 12:51:44,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-14 12:51:44,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 12:51:44,228 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 12:51:44,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 12:51:44,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1371702355, now seen corresponding path program 1 times [2023-02-14 12:51:44,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 12:51:44,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709649673] [2023-02-14 12:51:44,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:51:44,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 12:51:44,247 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 12:51:44,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [445907958] [2023-02-14 12:51:44,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:51:44,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 12:51:44,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 12:51:44,253 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) [2023-02-14 12:51:44,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-14 12:51:44,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 12:51:44,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-14 12:51:44,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 12:51:44,623 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-14 12:51:44,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 12:51:47,828 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-14 12:51:47,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 12:51:47,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709649673] [2023-02-14 12:51:47,828 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 12:51:47,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445907958] [2023-02-14 12:51:47,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445907958] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-14 12:51:47,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-14 12:51:47,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2023-02-14 12:51:47,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206407130] [2023-02-14 12:51:47,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 12:51:47,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-14 12:51:47,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 12:51:47,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-14 12:51:47,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-02-14 12:51:47,831 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-14 12:51:48,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 12:51:48,357 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2023-02-14 12:51:48,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-14 12:51:48,358 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 33 [2023-02-14 12:51:48,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 12:51:48,359 INFO L225 Difference]: With dead ends: 43 [2023-02-14 12:51:48,359 INFO L226 Difference]: Without dead ends: 41 [2023-02-14 12:51:48,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2023-02-14 12:51:48,360 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 11 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-14 12:51:48,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 79 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-14 12:51:48,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-02-14 12:51:48,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2023-02-14 12:51:48,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 28 states have internal predecessors, (32), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-14 12:51:48,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2023-02-14 12:51:48,369 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 33 [2023-02-14 12:51:48,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 12:51:48,370 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2023-02-14 12:51:48,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-14 12:51:48,370 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2023-02-14 12:51:48,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-14 12:51:48,373 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 12:51:48,373 INFO L195 NwaCegarLoop]: 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] [2023-02-14 12:51:48,383 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-14 12:51:48,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 12:51:48,579 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 12:51:48,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 12:51:48,580 INFO L85 PathProgramCache]: Analyzing trace with hash 403305007, now seen corresponding path program 1 times [2023-02-14 12:51:48,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 12:51:48,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479562542] [2023-02-14 12:51:48,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:51:48,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 12:51:48,592 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 12:51:48,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2063715414] [2023-02-14 12:51:48,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:51:48,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 12:51:48,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 12:51:48,608 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) [2023-02-14 12:51:48,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-14 12:51:48,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 12:51:48,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-14 12:51:48,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 12:51:48,858 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 12:51:48,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 12:51:49,446 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 12:51:49,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 12:51:49,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479562542] [2023-02-14 12:51:49,447 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 12:51:49,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063715414] [2023-02-14 12:51:49,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063715414] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 12:51:49,447 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 12:51:49,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2023-02-14 12:51:49,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802690804] [2023-02-14 12:51:49,448 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 12:51:49,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-14 12:51:49,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 12:51:49,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-14 12:51:49,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2023-02-14 12:51:49,450 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 13 states have internal predecessors, (31), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-14 12:51:50,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 12:51:50,452 INFO L93 Difference]: Finished difference Result 68 states and 83 transitions. [2023-02-14 12:51:50,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-14 12:51:50,453 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 13 states have internal predecessors, (31), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 33 [2023-02-14 12:51:50,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 12:51:50,454 INFO L225 Difference]: With dead ends: 68 [2023-02-14 12:51:50,454 INFO L226 Difference]: Without dead ends: 61 [2023-02-14 12:51:50,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2023-02-14 12:51:50,455 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 27 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-14 12:51:50,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 120 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-14 12:51:50,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-02-14 12:51:50,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2023-02-14 12:51:50,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 43 states have (on average 1.255813953488372) internal successors, (54), 44 states have internal predecessors, (54), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-14 12:51:50,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 73 transitions. [2023-02-14 12:51:50,469 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 73 transitions. Word has length 33 [2023-02-14 12:51:50,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 12:51:50,470 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 73 transitions. [2023-02-14 12:51:50,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 13 states have internal predecessors, (31), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-14 12:51:50,470 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 73 transitions. [2023-02-14 12:51:50,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-14 12:51:50,471 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 12:51:50,471 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-02-14 12:51:50,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-14 12:51:50,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 12:51:50,678 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 12:51:50,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 12:51:50,678 INFO L85 PathProgramCache]: Analyzing trace with hash 685673296, now seen corresponding path program 1 times [2023-02-14 12:51:50,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 12:51:50,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116260095] [2023-02-14 12:51:50,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:51:50,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 12:51:50,690 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 12:51:50,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1988190126] [2023-02-14 12:51:50,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:51:50,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 12:51:50,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 12:51:50,692 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) [2023-02-14 12:51:50,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-14 12:51:50,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 12:51:50,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-14 12:51:50,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 12:51:50,792 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-14 12:51:50,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 12:51:50,873 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-14 12:51:50,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 12:51:50,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116260095] [2023-02-14 12:51:50,874 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 12:51:50,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988190126] [2023-02-14 12:51:50,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988190126] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 12:51:50,874 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 12:51:50,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2023-02-14 12:51:50,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787924157] [2023-02-14 12:51:50,875 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 12:51:50,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-14 12:51:50,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 12:51:50,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-14 12:51:50,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-02-14 12:51:50,876 INFO L87 Difference]: Start difference. First operand 59 states and 73 transitions. Second operand has 11 states, 10 states have (on average 2.6) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-14 12:51:51,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 12:51:51,056 INFO L93 Difference]: Finished difference Result 67 states and 80 transitions. [2023-02-14 12:51:51,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-14 12:51:51,057 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.6) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) Word has length 39 [2023-02-14 12:51:51,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 12:51:51,058 INFO L225 Difference]: With dead ends: 67 [2023-02-14 12:51:51,058 INFO L226 Difference]: Without dead ends: 60 [2023-02-14 12:51:51,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2023-02-14 12:51:51,060 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 13 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 12:51:51,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 111 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 12:51:51,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-02-14 12:51:51,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2023-02-14 12:51:51,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 43 states have internal predecessors, (50), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-14 12:51:51,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2023-02-14 12:51:51,070 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 39 [2023-02-14 12:51:51,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 12:51:51,071 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2023-02-14 12:51:51,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.6) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-14 12:51:51,071 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2023-02-14 12:51:51,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-14 12:51:51,072 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 12:51:51,072 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 12:51:51,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-14 12:51:51,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 12:51:51,279 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 12:51:51,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 12:51:51,279 INFO L85 PathProgramCache]: Analyzing trace with hash -662815268, now seen corresponding path program 1 times [2023-02-14 12:51:51,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 12:51:51,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336191580] [2023-02-14 12:51:51,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:51:51,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 12:51:51,292 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 12:51:51,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1116030406] [2023-02-14 12:51:51,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:51:51,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 12:51:51,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 12:51:51,294 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) [2023-02-14 12:51:51,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-14 12:51:51,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 12:51:51,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 29 conjunts are in the unsatisfiable core [2023-02-14 12:51:51,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 12:51:51,690 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-14 12:51:51,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 12:52:09,827 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-14 12:52:09,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 12:52:09,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336191580] [2023-02-14 12:52:09,827 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 12:52:09,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116030406] [2023-02-14 12:52:09,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116030406] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 12:52:09,827 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 12:52:09,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2023-02-14 12:52:09,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963095342] [2023-02-14 12:52:09,828 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 12:52:09,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-14 12:52:09,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 12:52:09,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-14 12:52:09,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=215, Unknown=2, NotChecked=0, Total=272 [2023-02-14 12:52:09,829 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 7 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-02-14 12:52:11,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 12:52:14,890 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 12:52:17,568 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 12:52:24,866 WARN L233 SmtUtils]: Spent 6.44s on a formula simplification. DAG size of input: 63 DAG size of output: 29 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 12:52:36,555 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 12:52:38,337 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 12:52:40,309 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 12:52:44,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 12:52:44,753 INFO L93 Difference]: Finished difference Result 86 states and 103 transitions. [2023-02-14 12:52:44,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-14 12:52:44,754 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 7 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 42 [2023-02-14 12:52:44,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 12:52:44,755 INFO L225 Difference]: With dead ends: 86 [2023-02-14 12:52:44,755 INFO L226 Difference]: Without dead ends: 84 [2023-02-14 12:52:44,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 38.6s TimeCoverageRelationStatistics Valid=119, Invalid=430, Unknown=3, NotChecked=0, Total=552 [2023-02-14 12:52:44,756 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 18 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 20 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.2s IncrementalHoareTripleChecker+Time [2023-02-14 12:52:44,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 171 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 267 Invalid, 1 Unknown, 0 Unchecked, 13.2s Time] [2023-02-14 12:52:44,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-02-14 12:52:44,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 82. [2023-02-14 12:52:44,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 62 states have (on average 1.1774193548387097) internal successors, (73), 62 states have internal predecessors, (73), 13 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-14 12:52:44,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 99 transitions. [2023-02-14 12:52:44,769 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 99 transitions. Word has length 42 [2023-02-14 12:52:44,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 12:52:44,770 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 99 transitions. [2023-02-14 12:52:44,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 7 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-02-14 12:52:44,770 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 99 transitions. [2023-02-14 12:52:44,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-14 12:52:44,771 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 12:52:44,772 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 12:52:44,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-14 12:52:44,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 12:52:44,978 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 12:52:44,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 12:52:44,978 INFO L85 PathProgramCache]: Analyzing trace with hash -55550255, now seen corresponding path program 2 times [2023-02-14 12:52:44,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 12:52:44,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439186574] [2023-02-14 12:52:44,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:52:44,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 12:52:44,990 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 12:52:44,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1851707037] [2023-02-14 12:52:44,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 12:52:44,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 12:52:44,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 12:52:44,992 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) [2023-02-14 12:52:44,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-14 12:52:45,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 12:52:45,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 12:52:45,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 45 conjunts are in the unsatisfiable core [2023-02-14 12:52:45,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 12:52:55,464 WARN L233 SmtUtils]: Spent 9.02s on a formula simplification. DAG size of input: 5060 DAG size of output: 3073 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)