./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/hard-u_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/hard-u_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 acfb876dde79fce1275c4e206713974ad548aff8bf1022b4ac21a21145aaa523 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3dbbec3 [2023-02-14 12:29:58,436 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-14 12:29:58,437 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-14 12:29:58,459 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-14 12:29:58,459 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-14 12:29:58,462 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-14 12:29:58,465 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-14 12:29:58,467 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-14 12:29:58,469 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-14 12:29:58,472 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-14 12:29:58,473 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-14 12:29:58,475 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-14 12:29:58,476 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-14 12:29:58,479 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-14 12:29:58,480 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-14 12:29:58,481 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-14 12:29:58,481 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-14 12:29:58,482 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-14 12:29:58,483 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-14 12:29:58,484 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-14 12:29:58,484 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-14 12:29:58,485 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-14 12:29:58,486 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-14 12:29:58,486 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-14 12:29:58,488 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-14 12:29:58,488 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-14 12:29:58,489 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-14 12:29:58,489 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-14 12:29:58,489 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-14 12:29:58,490 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-14 12:29:58,490 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-14 12:29:58,491 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-14 12:29:58,491 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-14 12:29:58,492 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-14 12:29:58,492 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-14 12:29:58,492 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-14 12:29:58,493 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-14 12:29:58,493 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-14 12:29:58,493 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-14 12:29:58,494 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-14 12:29:58,494 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-14 12:29:58,495 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-14 12:29:58,510 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-14 12:29:58,510 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-14 12:29:58,510 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-14 12:29:58,511 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-14 12:29:58,511 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-14 12:29:58,511 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-14 12:29:58,512 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-14 12:29:58,512 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-14 12:29:58,512 INFO L138 SettingsManager]: * Use SBE=true [2023-02-14 12:29:58,512 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-14 12:29:58,513 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-14 12:29:58,513 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-14 12:29:58,513 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-14 12:29:58,513 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-14 12:29:58,513 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-14 12:29:58,514 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-14 12:29:58,514 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-14 12:29:58,514 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-14 12:29:58,514 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-14 12:29:58,514 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-14 12:29:58,514 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-14 12:29:58,515 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-14 12:29:58,515 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-14 12:29:58,515 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-14 12:29:58,515 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 12:29:58,515 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-14 12:29:58,515 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-14 12:29:58,516 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-14 12:29:58,516 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-14 12:29:58,516 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-14 12:29:58,516 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-14 12:29:58,516 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-14 12:29:58,516 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-14 12:29:58,517 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-14 12:29:58,517 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-14 12:29:58,517 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> acfb876dde79fce1275c4e206713974ad548aff8bf1022b4ac21a21145aaa523 [2023-02-14 12:29:58,653 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-14 12:29:58,665 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-14 12:29:58,667 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-14 12:29:58,668 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-14 12:29:58,668 INFO L275 PluginConnector]: CDTParser initialized [2023-02-14 12:29:58,669 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound10.c [2023-02-14 12:29:59,610 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-14 12:29:59,725 INFO L351 CDTParser]: Found 1 translation units. [2023-02-14 12:29:59,725 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound10.c [2023-02-14 12:29:59,729 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9048006f3/b954f818e41f45c192282808246f15d4/FLAG3733052b8 [2023-02-14 12:30:00,153 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9048006f3/b954f818e41f45c192282808246f15d4 [2023-02-14 12:30:00,155 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-14 12:30:00,157 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-14 12:30:00,158 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-14 12:30:00,158 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-14 12:30:00,161 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-14 12:30:00,161 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 12:30:00" (1/1) ... [2023-02-14 12:30:00,164 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a143d0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:30:00, skipping insertion in model container [2023-02-14 12:30:00,164 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 12:30:00" (1/1) ... [2023-02-14 12:30:00,169 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-14 12:30:00,184 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-14 12:30:00,264 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/hard-u_valuebound10.c[537,550] [2023-02-14 12:30:00,274 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 12:30:00,279 INFO L203 MainTranslator]: Completed pre-run [2023-02-14 12:30:00,286 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/hard-u_valuebound10.c[537,550] [2023-02-14 12:30:00,290 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 12:30:00,298 INFO L208 MainTranslator]: Completed translation [2023-02-14 12:30:00,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:30:00 WrapperNode [2023-02-14 12:30:00,299 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-14 12:30:00,300 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-14 12:30:00,300 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-14 12:30:00,300 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-14 12:30:00,304 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:30:00" (1/1) ... [2023-02-14 12:30:00,308 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:30:00" (1/1) ... [2023-02-14 12:30:00,318 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 55 [2023-02-14 12:30:00,319 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-14 12:30:00,319 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-14 12:30:00,319 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-14 12:30:00,319 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-14 12:30:00,325 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:30:00" (1/1) ... [2023-02-14 12:30:00,325 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:30:00" (1/1) ... [2023-02-14 12:30:00,326 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:30:00" (1/1) ... [2023-02-14 12:30:00,326 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:30:00" (1/1) ... [2023-02-14 12:30:00,328 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:30:00" (1/1) ... [2023-02-14 12:30:00,330 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:30:00" (1/1) ... [2023-02-14 12:30:00,331 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:30:00" (1/1) ... [2023-02-14 12:30:00,331 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:30:00" (1/1) ... [2023-02-14 12:30:00,332 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-14 12:30:00,333 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-14 12:30:00,333 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-14 12:30:00,333 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-14 12:30:00,333 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:30:00" (1/1) ... [2023-02-14 12:30:00,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 12:30:00,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 12:30:00,364 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 12:30:00,366 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 12:30:00,396 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-14 12:30:00,397 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-14 12:30:00,397 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-14 12:30:00,397 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-14 12:30:00,397 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-14 12:30:00,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-14 12:30:00,401 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-14 12:30:00,401 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-14 12:30:00,445 INFO L235 CfgBuilder]: Building ICFG [2023-02-14 12:30:00,446 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-14 12:30:00,574 INFO L276 CfgBuilder]: Performing block encoding [2023-02-14 12:30:00,578 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-14 12:30:00,578 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-14 12:30:00,580 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 12:30:00 BoogieIcfgContainer [2023-02-14 12:30:00,580 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-14 12:30:00,581 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-14 12:30:00,581 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-14 12:30:00,584 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-14 12:30:00,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 12:30:00" (1/3) ... [2023-02-14 12:30:00,585 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bd1cef5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 12:30:00, skipping insertion in model container [2023-02-14 12:30:00,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:30:00" (2/3) ... [2023-02-14 12:30:00,585 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bd1cef5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 12:30:00, skipping insertion in model container [2023-02-14 12:30:00,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 12:30:00" (3/3) ... [2023-02-14 12:30:00,586 INFO L112 eAbstractionObserver]: Analyzing ICFG hard-u_valuebound10.c [2023-02-14 12:30:00,598 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-14 12:30:00,598 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-14 12:30:00,628 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-14 12:30:00,632 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;@2578b19f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-14 12:30:00,632 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-14 12:30:00,635 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-14 12:30:00,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-14 12:30:00,640 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 12:30:00,640 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 12:30:00,641 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 12:30:00,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 12:30:00,644 INFO L85 PathProgramCache]: Analyzing trace with hash -487550744, now seen corresponding path program 1 times [2023-02-14 12:30:00,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 12:30:00,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990388750] [2023-02-14 12:30:00,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:30:00,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 12:30:00,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 12:30:00,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 12:30:00,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 12:30:00,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 12:30:00,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 12:30:00,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-14 12:30:00,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 12:30:00,746 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 12:30:00,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 12:30:00,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990388750] [2023-02-14 12:30:00,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990388750] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 12:30:00,747 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 12:30:00,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-14 12:30:00,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376582332] [2023-02-14 12:30:00,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 12:30:00,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-14 12:30:00,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 12:30:00,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-14 12:30:00,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-14 12:30:00,769 INFO L87 Difference]: Start difference. First operand has 33 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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), 2 states have call successors, (3) [2023-02-14 12:30:00,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 12:30:00,784 INFO L93 Difference]: Finished difference Result 63 states and 104 transitions. [2023-02-14 12:30:00,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-14 12:30:00,785 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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), 2 states have call successors, (3) Word has length 24 [2023-02-14 12:30:00,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 12:30:00,789 INFO L225 Difference]: With dead ends: 63 [2023-02-14 12:30:00,789 INFO L226 Difference]: Without dead ends: 29 [2023-02-14 12:30:00,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-14 12:30:00,794 INFO L413 NwaCegarLoop]: 43 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, 43 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 12:30:00,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 12:30:00,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-02-14 12:30:00,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-02-14 12:30:00,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-14 12:30:00,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2023-02-14 12:30:00,827 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 24 [2023-02-14 12:30:00,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 12:30:00,834 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2023-02-14 12:30:00,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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), 2 states have call successors, (3) [2023-02-14 12:30:00,835 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2023-02-14 12:30:00,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-14 12:30:00,836 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 12:30:00,836 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 12:30:00,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-14 12:30:00,837 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 12:30:00,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 12:30:00,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1636258074, now seen corresponding path program 1 times [2023-02-14 12:30:00,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 12:30:00,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232672686] [2023-02-14 12:30:00,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:30:00,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 12:30:00,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 12:30:00,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 12:30:00,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 12:30:00,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 12:30:00,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 12:30:00,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-14 12:30:00,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 12:30:00,988 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 12:30:00,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 12:30:00,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232672686] [2023-02-14 12:30:00,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232672686] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 12:30:00,988 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 12:30:00,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-14 12:30:00,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295999470] [2023-02-14 12:30:00,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 12:30:00,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 12:30:00,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 12:30:00,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 12:30:00,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-14 12:30:00,991 INFO L87 Difference]: Start difference. First operand 29 states and 39 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 12:30:01,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 12:30:01,033 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2023-02-14 12:30:01,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 12:30:01,034 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 12:30:01,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 12:30:01,035 INFO L225 Difference]: With dead ends: 42 [2023-02-14 12:30:01,035 INFO L226 Difference]: Without dead ends: 40 [2023-02-14 12:30:01,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 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 12:30:01,036 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 12 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 12:30:01,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 128 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 12:30:01,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-02-14 12:30:01,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2023-02-14 12:30:01,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-14 12:30:01,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2023-02-14 12:30:01,044 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 24 [2023-02-14 12:30:01,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 12:30:01,045 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2023-02-14 12:30:01,045 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 12:30:01,045 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2023-02-14 12:30:01,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-14 12:30:01,046 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 12:30:01,046 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] [2023-02-14 12:30:01,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-14 12:30:01,046 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 12:30:01,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 12:30:01,047 INFO L85 PathProgramCache]: Analyzing trace with hash 906849917, now seen corresponding path program 1 times [2023-02-14 12:30:01,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 12:30:01,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664504492] [2023-02-14 12:30:01,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:30:01,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 12:30:01,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 12:30:01,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 12:30:01,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 12:30:01,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 12:30:01,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 12:30:01,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-14 12:30:01,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 12:30:01,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-14 12:30:01,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 12:30:01,353 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-14 12:30:01,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 12:30:01,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664504492] [2023-02-14 12:30:01,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664504492] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 12:30:01,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 12:30:01,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-14 12:30:01,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835815216] [2023-02-14 12:30:01,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 12:30:01,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 12:30:01,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 12:30:01,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 12:30:01,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-14 12:30:01,360 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 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 12:30:01,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 12:30:01,434 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2023-02-14 12:30:01,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 12:30:01,435 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 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 29 [2023-02-14 12:30:01,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 12:30:01,436 INFO L225 Difference]: With dead ends: 46 [2023-02-14 12:30:01,437 INFO L226 Difference]: Without dead ends: 44 [2023-02-14 12:30:01,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 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 12:30:01,438 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 10 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 12:30:01,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 123 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 12:30:01,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-02-14 12:30:01,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2023-02-14 12:30:01,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-14 12:30:01,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2023-02-14 12:30:01,445 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 29 [2023-02-14 12:30:01,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 12:30:01,446 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2023-02-14 12:30:01,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 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 12:30:01,446 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2023-02-14 12:30:01,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-14 12:30:01,447 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 12:30:01,447 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 12:30:01,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-14 12:30:01,447 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 12:30:01,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 12:30:01,448 INFO L85 PathProgramCache]: Analyzing trace with hash 710995206, now seen corresponding path program 1 times [2023-02-14 12:30:01,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 12:30:01,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945909747] [2023-02-14 12:30:01,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:30:01,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 12:30:01,456 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 12:30:01,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [504949982] [2023-02-14 12:30:01,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:30:01,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 12:30:01,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 12:30:01,468 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 12:30:01,495 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 12:30:01,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 12:30:01,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-14 12:30:01,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 12:30:01,636 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-14 12:30:01,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 12:30:01,847 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-14 12:30:01,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 12:30:01,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945909747] [2023-02-14 12:30:01,847 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 12:30:01,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504949982] [2023-02-14 12:30:01,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504949982] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 12:30:01,848 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 12:30:01,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-02-14 12:30:01,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59956970] [2023-02-14 12:30:01,848 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 12:30:01,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-14 12:30:01,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 12:30:01,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-14 12:30:01,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-02-14 12:30:01,855 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 12 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2023-02-14 12:30:04,011 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 12:30:06,025 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 12:30:07,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 12:30:07,066 INFO L93 Difference]: Finished difference Result 76 states and 100 transitions. [2023-02-14 12:30:07,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-14 12:30:07,066 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 34 [2023-02-14 12:30:07,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 12:30:07,068 INFO L225 Difference]: With dead ends: 76 [2023-02-14 12:30:07,068 INFO L226 Difference]: Without dead ends: 62 [2023-02-14 12:30:07,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-02-14 12:30:07,069 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 17 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 11 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2023-02-14 12:30:07,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 164 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 256 Invalid, 2 Unknown, 0 Unchecked, 5.2s Time] [2023-02-14 12:30:07,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-02-14 12:30:07,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2023-02-14 12:30:07,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 38 states have internal predecessors, (39), 21 states have call successors, (21), 6 states have call predecessors, (21), 6 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2023-02-14 12:30:07,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 79 transitions. [2023-02-14 12:30:07,084 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 79 transitions. Word has length 34 [2023-02-14 12:30:07,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 12:30:07,084 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 79 transitions. [2023-02-14 12:30:07,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2023-02-14 12:30:07,084 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 79 transitions. [2023-02-14 12:30:07,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-14 12:30:07,085 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 12:30:07,085 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 12:30:07,108 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 12:30:07,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 12:30:07,290 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 12:30:07,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 12:30:07,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1829555286, now seen corresponding path program 1 times [2023-02-14 12:30:07,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 12:30:07,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727583570] [2023-02-14 12:30:07,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:30:07,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 12:30:07,298 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 12:30:07,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2118232136] [2023-02-14 12:30:07,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:30:07,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 12:30:07,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 12:30:07,300 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 12:30:07,302 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 12:30:07,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 12:30:07,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2023-02-14 12:30:07,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 12:30:07,491 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-14 12:30:07,491 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 12:30:07,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 12:30:07,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727583570] [2023-02-14 12:30:07,491 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 12:30:07,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118232136] [2023-02-14 12:30:07,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118232136] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 12:30:07,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 12:30:07,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-14 12:30:07,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402524740] [2023-02-14 12:30:07,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 12:30:07,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-14 12:30:07,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 12:30:07,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-14 12:30:07,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-02-14 12:30:07,494 INFO L87 Difference]: Start difference. First operand 62 states and 79 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-14 12:30:07,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 12:30:07,992 INFO L93 Difference]: Finished difference Result 72 states and 87 transitions. [2023-02-14 12:30:07,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-14 12:30:07,993 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 41 [2023-02-14 12:30:07,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 12:30:07,994 INFO L225 Difference]: With dead ends: 72 [2023-02-14 12:30:07,994 INFO L226 Difference]: Without dead ends: 61 [2023-02-14 12:30:07,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-02-14 12:30:07,995 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 20 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-14 12:30:07,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 147 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-14 12:30:08,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-02-14 12:30:08,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2023-02-14 12:30:08,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 38 states have internal predecessors, (39), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2023-02-14 12:30:08,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2023-02-14 12:30:08,020 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 41 [2023-02-14 12:30:08,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 12:30:08,020 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2023-02-14 12:30:08,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-14 12:30:08,020 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2023-02-14 12:30:08,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-02-14 12:30:08,021 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 12:30:08,021 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 12:30:08,028 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 12:30:08,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 12:30:08,226 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 12:30:08,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 12:30:08,226 INFO L85 PathProgramCache]: Analyzing trace with hash -421337323, now seen corresponding path program 1 times [2023-02-14 12:30:08,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 12:30:08,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549456922] [2023-02-14 12:30:08,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:30:08,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 12:30:08,233 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 12:30:08,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [933160957] [2023-02-14 12:30:08,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:30:08,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 12:30:08,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 12:30:08,240 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 12:30:08,241 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 12:30:08,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 12:30:08,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-14 12:30:08,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 12:30:08,586 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 17 proven. 21 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-02-14 12:30:08,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 12:30:09,837 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 19 proven. 13 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-02-14 12:30:09,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 12:30:09,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549456922] [2023-02-14 12:30:09,837 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 12:30:09,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933160957] [2023-02-14 12:30:09,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933160957] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 12:30:09,838 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 12:30:09,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 17 [2023-02-14 12:30:09,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961075642] [2023-02-14 12:30:09,838 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 12:30:09,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-14 12:30:09,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 12:30:09,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-14 12:30:09,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2023-02-14 12:30:09,839 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 14 states have internal predecessors, (35), 7 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 8 states have call predecessors, (18), 7 states have call successors, (18) [2023-02-14 12:30:12,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 12:30:12,415 INFO L93 Difference]: Finished difference Result 76 states and 94 transitions. [2023-02-14 12:30:12,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-14 12:30:12,415 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 14 states have internal predecessors, (35), 7 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 8 states have call predecessors, (18), 7 states have call successors, (18) Word has length 58 [2023-02-14 12:30:12,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 12:30:12,416 INFO L225 Difference]: With dead ends: 76 [2023-02-14 12:30:12,416 INFO L226 Difference]: Without dead ends: 74 [2023-02-14 12:30:12,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2023-02-14 12:30:12,417 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 55 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-02-14 12:30:12,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 106 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-02-14 12:30:12,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-02-14 12:30:12,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2023-02-14 12:30:12,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 47 states have internal predecessors, (48), 22 states have call successors, (22), 8 states have call predecessors, (22), 8 states have return successors, (21), 17 states have call predecessors, (21), 21 states have call successors, (21) [2023-02-14 12:30:12,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 91 transitions. [2023-02-14 12:30:12,441 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 91 transitions. Word has length 58 [2023-02-14 12:30:12,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 12:30:12,442 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 91 transitions. [2023-02-14 12:30:12,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 14 states have internal predecessors, (35), 7 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 8 states have call predecessors, (18), 7 states have call successors, (18) [2023-02-14 12:30:12,442 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 91 transitions. [2023-02-14 12:30:12,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-02-14 12:30:12,443 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 12:30:12,443 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 12:30:12,454 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 12:30:12,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 12:30:12,653 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 12:30:12,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 12:30:12,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1609951834, now seen corresponding path program 1 times [2023-02-14 12:30:12,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 12:30:12,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465605219] [2023-02-14 12:30:12,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:30:12,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 12:30:12,660 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 12:30:12,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1134338808] [2023-02-14 12:30:12,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:30:12,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 12:30:12,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 12:30:12,670 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 12:30:12,672 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 12:30:13,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 12:30:13,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 39 conjunts are in the unsatisfiable core [2023-02-14 12:30:13,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 12:30:13,907 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 21 proven. 35 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-02-14 12:30:13,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 12:30:16,349 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 31 proven. 19 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2023-02-14 12:30:16,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 12:30:16,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465605219] [2023-02-14 12:30:16,349 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 12:30:16,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134338808] [2023-02-14 12:30:16,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134338808] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 12:30:16,349 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 12:30:16,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 20 [2023-02-14 12:30:16,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151444858] [2023-02-14 12:30:16,350 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 12:30:16,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-14 12:30:16,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 12:30:16,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-14 12:30:16,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2023-02-14 12:30:16,351 INFO L87 Difference]: Start difference. First operand 73 states and 91 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 16 states have internal predecessors, (35), 10 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 11 states have call predecessors, (22), 10 states have call successors, (22) [2023-02-14 12:30:24,006 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 12:30:26,008 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 12:30:28,011 WARN L539 Checker$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 12:30:33,076 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 12:30:35,096 WARN L539 Checker$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 12:30:36,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 12:30:36,090 INFO L93 Difference]: Finished difference Result 114 states and 150 transitions. [2023-02-14 12:30:36,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-14 12:30:36,091 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 16 states have internal predecessors, (35), 10 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 11 states have call predecessors, (22), 10 states have call successors, (22) Word has length 68 [2023-02-14 12:30:36,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 12:30:36,093 INFO L225 Difference]: With dead ends: 114 [2023-02-14 12:30:36,093 INFO L226 Difference]: Without dead ends: 102 [2023-02-14 12:30:36,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2023-02-14 12:30:36,094 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 72 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 83 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.1s IncrementalHoareTripleChecker+Time [2023-02-14 12:30:36,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 194 Invalid, 690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 603 Invalid, 4 Unknown, 0 Unchecked, 19.1s Time] [2023-02-14 12:30:36,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-02-14 12:30:36,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 98. [2023-02-14 12:30:36,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 55 states have (on average 1.1636363636363636) internal successors, (64), 61 states have internal predecessors, (64), 33 states have call successors, (33), 9 states have call predecessors, (33), 9 states have return successors, (32), 27 states have call predecessors, (32), 32 states have call successors, (32) [2023-02-14 12:30:36,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 129 transitions. [2023-02-14 12:30:36,142 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 129 transitions. Word has length 68 [2023-02-14 12:30:36,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 12:30:36,143 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 129 transitions. [2023-02-14 12:30:36,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 16 states have internal predecessors, (35), 10 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 11 states have call predecessors, (22), 10 states have call successors, (22) [2023-02-14 12:30:36,144 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 129 transitions. [2023-02-14 12:30:36,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-14 12:30:36,147 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 12:30:36,147 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 12:30:36,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-14 12:30:36,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 12:30:36,353 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 12:30:36,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 12:30:36,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1754894755, now seen corresponding path program 1 times [2023-02-14 12:30:36,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 12:30:36,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534820133] [2023-02-14 12:30:36,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:30:36,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 12:30:36,360 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 12:30:36,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1541516732] [2023-02-14 12:30:36,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 12:30:36,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 12:30:36,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 12:30:36,361 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 12:30:36,363 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 12:30:37,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 12:30:37,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 52 conjunts are in the unsatisfiable core [2023-02-14 12:30:37,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 12:30:38,069 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2023-02-14 12:30:38,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 12:31:27,458 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse1 (mod |c_ULTIMATE.start_main_~d~0#1| 4294967296))) (let ((.cse2 (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296)) (.cse0 (mod |c_ULTIMATE.start_main_~p~0#1| 4294967296)) (.cse3 (div .cse1 2))) (or (= .cse0 1) (<= .cse1 .cse2) (not (= .cse1 (mod (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~B~0#1|) 4294967296))) (not (<= (mod .cse3 4294967296) .cse2)) (= (mod |c_ULTIMATE.start_main_~A~0#1| 4294967296) (mod (+ (* |c_ULTIMATE.start_main_~B~0#1| (div .cse0 2)) (* |c_ULTIMATE.start_main_~B~0#1| |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~r~0#1| (* 4294967295 .cse3)) 4294967296))))) is different from true [2023-02-14 12:33:07,596 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 35 proven. 17 refuted. 2 times theorem prover too weak. 88 trivial. 5 not checked. [2023-02-14 12:33:07,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 12:33:07,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534820133] [2023-02-14 12:33:07,596 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 12:33:07,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541516732] [2023-02-14 12:33:07,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541516732] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 12:33:07,596 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 12:33:07,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 24 [2023-02-14 12:33:07,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354801015] [2023-02-14 12:33:07,596 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 12:33:07,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-14 12:33:07,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 12:33:07,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-14 12:33:07,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=409, Unknown=11, NotChecked=42, Total=552 [2023-02-14 12:33:07,598 INFO L87 Difference]: Start difference. First operand 98 states and 129 transitions. Second operand has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 20 states have internal predecessors, (41), 11 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 11 states have call predecessors, (22), 9 states have call successors, (22) [2023-02-14 12:33:11,027 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 12:33:14,240 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 12:33:25,114 WARN L539 Checker$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 12:33:26,717 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 12:33:28,722 WARN L539 Checker$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 12:33:46,123 WARN L233 SmtUtils]: Spent 12.40s on a formula simplification. DAG size of input: 47 DAG size of output: 43 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 12:33:48,127 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 12:33:50,237 WARN L539 Checker$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 12:33:52,889 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 12:33:58,520 WARN L539 Checker$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 12:34:01,353 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 []