./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5317dae 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-ll_unwindbound5.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 1eba5bc7e50ef659abfe155713ae512eb1ae4032ecb78db63a02f9acbcdf9dbe --- Real Ultimate output --- This is Ultimate 0.2.2-?-b5317da-m [2023-02-16 02:18:19,341 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-16 02:18:19,343 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-16 02:18:19,382 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-16 02:18:19,382 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-16 02:18:19,385 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-16 02:18:19,387 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-16 02:18:19,389 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-16 02:18:19,391 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-16 02:18:19,395 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-16 02:18:19,396 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-16 02:18:19,398 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-16 02:18:19,399 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-16 02:18:19,400 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-16 02:18:19,402 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-16 02:18:19,403 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-16 02:18:19,404 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-16 02:18:19,409 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-16 02:18:19,410 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-16 02:18:19,414 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-16 02:18:19,415 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-16 02:18:19,416 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-16 02:18:19,417 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-16 02:18:19,418 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-16 02:18:19,422 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-16 02:18:19,422 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-16 02:18:19,422 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-16 02:18:19,423 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-16 02:18:19,423 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-16 02:18:19,424 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-16 02:18:19,424 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-16 02:18:19,424 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-16 02:18:19,425 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-16 02:18:19,426 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-16 02:18:19,427 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-16 02:18:19,427 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-16 02:18:19,427 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-16 02:18:19,428 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-16 02:18:19,428 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-16 02:18:19,428 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-16 02:18:19,429 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-16 02:18:19,431 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-16 02:18:19,450 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-16 02:18:19,451 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-16 02:18:19,451 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-16 02:18:19,451 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-16 02:18:19,452 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-16 02:18:19,452 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-16 02:18:19,452 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-16 02:18:19,453 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-16 02:18:19,453 INFO L138 SettingsManager]: * Use SBE=true [2023-02-16 02:18:19,453 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-16 02:18:19,453 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-16 02:18:19,453 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-16 02:18:19,453 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-16 02:18:19,454 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-16 02:18:19,454 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-16 02:18:19,454 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-16 02:18:19,454 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-16 02:18:19,454 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-16 02:18:19,454 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-16 02:18:19,455 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-16 02:18:19,455 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-16 02:18:19,455 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-16 02:18:19,455 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-16 02:18:19,455 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-16 02:18:19,455 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 02:18:19,456 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-16 02:18:19,456 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-16 02:18:19,456 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-16 02:18:19,456 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-16 02:18:19,456 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-16 02:18:19,456 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-16 02:18:19,457 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-16 02:18:19,457 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-16 02:18:19,457 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-16 02:18:19,457 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-16 02:18:19,457 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1eba5bc7e50ef659abfe155713ae512eb1ae4032ecb78db63a02f9acbcdf9dbe [2023-02-16 02:18:19,672 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-16 02:18:19,698 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-16 02:18:19,700 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-16 02:18:19,701 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-16 02:18:19,701 INFO L275 PluginConnector]: CDTParser initialized [2023-02-16 02:18:19,702 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound5.c [2023-02-16 02:18:20,827 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-16 02:18:21,006 INFO L351 CDTParser]: Found 1 translation units. [2023-02-16 02:18:21,007 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound5.c [2023-02-16 02:18:21,012 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f25dd803/2ca50c811c8d44e580fc68fcc412fb03/FLAGf6e28d1b2 [2023-02-16 02:18:21,031 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f25dd803/2ca50c811c8d44e580fc68fcc412fb03 [2023-02-16 02:18:21,033 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-16 02:18:21,035 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-16 02:18:21,038 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-16 02:18:21,038 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-16 02:18:21,041 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-16 02:18:21,042 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 02:18:21" (1/1) ... [2023-02-16 02:18:21,045 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@402f8293 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:18:21, skipping insertion in model container [2023-02-16 02:18:21,045 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 02:18:21" (1/1) ... [2023-02-16 02:18:21,050 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-16 02:18:21,065 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-16 02:18:21,232 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-ll_unwindbound5.c[538,551] [2023-02-16 02:18:21,259 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 02:18:21,269 INFO L203 MainTranslator]: Completed pre-run [2023-02-16 02:18:21,280 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-ll_unwindbound5.c[538,551] [2023-02-16 02:18:21,289 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 02:18:21,300 INFO L208 MainTranslator]: Completed translation [2023-02-16 02:18:21,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:18:21 WrapperNode [2023-02-16 02:18:21,301 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-16 02:18:21,301 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-16 02:18:21,302 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-16 02:18:21,302 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-16 02:18:21,306 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:18:21" (1/1) ... [2023-02-16 02:18:21,311 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:18:21" (1/1) ... [2023-02-16 02:18:21,323 INFO L138 Inliner]: procedures = 14, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 65 [2023-02-16 02:18:21,324 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-16 02:18:21,324 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-16 02:18:21,324 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-16 02:18:21,325 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-16 02:18:21,335 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:18:21" (1/1) ... [2023-02-16 02:18:21,335 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:18:21" (1/1) ... [2023-02-16 02:18:21,337 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:18:21" (1/1) ... [2023-02-16 02:18:21,338 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:18:21" (1/1) ... [2023-02-16 02:18:21,342 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:18:21" (1/1) ... [2023-02-16 02:18:21,350 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:18:21" (1/1) ... [2023-02-16 02:18:21,351 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:18:21" (1/1) ... [2023-02-16 02:18:21,352 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:18:21" (1/1) ... [2023-02-16 02:18:21,353 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-16 02:18:21,354 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-16 02:18:21,354 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-16 02:18:21,354 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-16 02:18:21,355 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:18:21" (1/1) ... [2023-02-16 02:18:21,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 02:18:21,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:18:21,382 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) [2023-02-16 02:18:21,387 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 [2023-02-16 02:18:21,418 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-16 02:18:21,418 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-16 02:18:21,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-16 02:18:21,418 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-16 02:18:21,419 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-16 02:18:21,419 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-16 02:18:21,474 INFO L235 CfgBuilder]: Building ICFG [2023-02-16 02:18:21,476 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-16 02:18:21,657 INFO L276 CfgBuilder]: Performing block encoding [2023-02-16 02:18:21,669 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-16 02:18:21,669 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-16 02:18:21,671 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 02:18:21 BoogieIcfgContainer [2023-02-16 02:18:21,671 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-16 02:18:21,673 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-16 02:18:21,673 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-16 02:18:21,676 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-16 02:18:21,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.02 02:18:21" (1/3) ... [2023-02-16 02:18:21,676 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24bcb0a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 02:18:21, skipping insertion in model container [2023-02-16 02:18:21,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:18:21" (2/3) ... [2023-02-16 02:18:21,677 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24bcb0a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 02:18:21, skipping insertion in model container [2023-02-16 02:18:21,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 02:18:21" (3/3) ... [2023-02-16 02:18:21,678 INFO L112 eAbstractionObserver]: Analyzing ICFG hard-ll_unwindbound5.c [2023-02-16 02:18:21,708 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-16 02:18:21,708 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-16 02:18:21,763 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-16 02:18:21,768 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;@5157ee2d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-16 02:18:21,769 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-16 02:18:21,772 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-16 02:18:21,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-16 02:18:21,778 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:18:21,779 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:18:21,781 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:18:21,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:18:21,787 INFO L85 PathProgramCache]: Analyzing trace with hash -712527539, now seen corresponding path program 1 times [2023-02-16 02:18:21,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:18:21,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706957267] [2023-02-16 02:18:21,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:18:21,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:18:21,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:18:21,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:18:21,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706957267] [2023-02-16 02:18:21,925 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-16 02:18:21,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511487931] [2023-02-16 02:18:21,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:18:21,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:18:21,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:18:21,933 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) [2023-02-16 02:18:21,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-16 02:18:22,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:18:22,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-16 02:18:22,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:18:22,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 02:18:22,036 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 02:18:22,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511487931] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 02:18:22,037 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 02:18:22,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-16 02:18:22,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421732334] [2023-02-16 02:18:22,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 02:18:22,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-16 02:18:22,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:18:22,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-16 02:18:22,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-16 02:18:22,067 INFO L87 Difference]: Start difference. First operand has 28 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 02:18:22,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:18:22,086 INFO L93 Difference]: Finished difference Result 53 states and 87 transitions. [2023-02-16 02:18:22,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-16 02:18:22,088 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-16 02:18:22,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:18:22,094 INFO L225 Difference]: With dead ends: 53 [2023-02-16 02:18:22,094 INFO L226 Difference]: Without dead ends: 24 [2023-02-16 02:18:22,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-16 02:18:22,099 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 02:18:22,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 02:18:22,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-02-16 02:18:22,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-02-16 02:18:22,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-16 02:18:22,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2023-02-16 02:18:22,130 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 10 [2023-02-16 02:18:22,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:18:22,130 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2023-02-16 02:18:22,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 02:18:22,131 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2023-02-16 02:18:22,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-16 02:18:22,131 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:18:22,131 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:18:22,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-16 02:18:22,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-02-16 02:18:22,337 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:18:22,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:18:22,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1983932575, now seen corresponding path program 1 times [2023-02-16 02:18:22,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:18:22,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622185271] [2023-02-16 02:18:22,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:18:22,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:18:22,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:18:22,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 02:18:22,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:18:22,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622185271] [2023-02-16 02:18:22,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622185271] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 02:18:22,540 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 02:18:22,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-16 02:18:22,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483084425] [2023-02-16 02:18:22,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 02:18:22,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-16 02:18:22,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:18:22,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-16 02:18:22,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-16 02:18:22,543 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 02:18:22,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:18:22,602 INFO L93 Difference]: Finished difference Result 38 states and 53 transitions. [2023-02-16 02:18:22,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-16 02:18:22,604 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-16 02:18:22,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:18:22,605 INFO L225 Difference]: With dead ends: 38 [2023-02-16 02:18:22,606 INFO L226 Difference]: Without dead ends: 36 [2023-02-16 02:18:22,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-16 02:18:22,608 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 15 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 106 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 [2023-02-16 02:18:22,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 106 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 02:18:22,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-02-16 02:18:22,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 28. [2023-02-16 02:18:22,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-16 02:18:22,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2023-02-16 02:18:22,621 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 10 [2023-02-16 02:18:22,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:18:22,621 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2023-02-16 02:18:22,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 02:18:22,622 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2023-02-16 02:18:22,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-16 02:18:22,622 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:18:22,622 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:18:22,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-16 02:18:22,623 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:18:22,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:18:22,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1787143384, now seen corresponding path program 1 times [2023-02-16 02:18:22,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:18:22,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953940821] [2023-02-16 02:18:22,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:18:22,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:18:22,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:18:22,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:18:22,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953940821] [2023-02-16 02:18:22,640 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-16 02:18:22,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209865789] [2023-02-16 02:18:22,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:18:22,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:18:22,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:18:22,642 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) [2023-02-16 02:18:22,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-16 02:18:22,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:18:22,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-16 02:18:22,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:18:22,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 02:18:22,739 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 02:18:22,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209865789] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 02:18:22,740 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 02:18:22,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-16 02:18:22,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728425113] [2023-02-16 02:18:22,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 02:18:22,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-16 02:18:22,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:18:22,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-16 02:18:22,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-16 02:18:22,742 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 02:18:22,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:18:22,756 INFO L93 Difference]: Finished difference Result 44 states and 59 transitions. [2023-02-16 02:18:22,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-16 02:18:22,757 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-02-16 02:18:22,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:18:22,758 INFO L225 Difference]: With dead ends: 44 [2023-02-16 02:18:22,758 INFO L226 Difference]: Without dead ends: 30 [2023-02-16 02:18:22,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-16 02:18:22,759 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 02:18:22,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 89 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 02:18:22,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-02-16 02:18:22,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-02-16 02:18:22,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-16 02:18:22,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2023-02-16 02:18:22,766 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 12 [2023-02-16 02:18:22,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:18:22,766 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2023-02-16 02:18:22,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 02:18:22,766 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2023-02-16 02:18:22,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-16 02:18:22,767 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:18:22,767 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:18:22,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-16 02:18:22,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-02-16 02:18:22,973 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:18:22,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:18:22,974 INFO L85 PathProgramCache]: Analyzing trace with hash 472519838, now seen corresponding path program 1 times [2023-02-16 02:18:22,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:18:22,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022425556] [2023-02-16 02:18:22,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:18:22,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:18:22,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:18:23,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-16 02:18:23,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:18:23,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 02:18:23,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:18:23,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022425556] [2023-02-16 02:18:23,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022425556] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 02:18:23,124 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 02:18:23,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-16 02:18:23,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341948879] [2023-02-16 02:18:23,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 02:18:23,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-16 02:18:23,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:18:23,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-16 02:18:23,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-16 02:18:23,126 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 02:18:23,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:18:23,205 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2023-02-16 02:18:23,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-16 02:18:23,206 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-02-16 02:18:23,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:18:23,207 INFO L225 Difference]: With dead ends: 44 [2023-02-16 02:18:23,207 INFO L226 Difference]: Without dead ends: 42 [2023-02-16 02:18:23,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-16 02:18:23,209 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 13 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 02:18:23,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 102 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 02:18:23,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-02-16 02:18:23,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 34. [2023-02-16 02:18:23,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-16 02:18:23,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2023-02-16 02:18:23,219 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 15 [2023-02-16 02:18:23,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:18:23,219 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2023-02-16 02:18:23,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 02:18:23,220 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2023-02-16 02:18:23,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-16 02:18:23,220 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:18:23,220 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:18:23,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-16 02:18:23,221 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:18:23,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:18:23,221 INFO L85 PathProgramCache]: Analyzing trace with hash 838495553, now seen corresponding path program 1 times [2023-02-16 02:18:23,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:18:23,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158689165] [2023-02-16 02:18:23,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:18:23,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:18:23,247 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 02:18:23,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1180310054] [2023-02-16 02:18:23,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:18:23,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:18:23,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:18:23,249 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) [2023-02-16 02:18:23,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-16 02:18:23,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:18:23,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-16 02:18:23,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:18:23,396 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-16 02:18:23,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:18:23,592 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-16 02:18:23,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:18:23,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158689165] [2023-02-16 02:18:23,593 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 02:18:23,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180310054] [2023-02-16 02:18:23,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180310054] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:18:23,593 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 02:18:23,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-02-16 02:18:23,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511719038] [2023-02-16 02:18:23,594 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 02:18:23,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-16 02:18:23,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:18:23,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-16 02:18:23,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-02-16 02:18:23,598 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 12 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-16 02:18:23,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:18:23,842 INFO L93 Difference]: Finished difference Result 75 states and 101 transitions. [2023-02-16 02:18:23,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-16 02:18:23,843 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Word has length 20 [2023-02-16 02:18:23,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:18:23,845 INFO L225 Difference]: With dead ends: 75 [2023-02-16 02:18:23,845 INFO L226 Difference]: Without dead ends: 59 [2023-02-16 02:18:23,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-02-16 02:18:23,846 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 39 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 02:18:23,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 73 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 02:18:23,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-02-16 02:18:23,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2023-02-16 02:18:23,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 38 states have internal predecessors, (44), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-16 02:18:23,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 72 transitions. [2023-02-16 02:18:23,860 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 72 transitions. Word has length 20 [2023-02-16 02:18:23,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:18:23,860 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 72 transitions. [2023-02-16 02:18:23,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-16 02:18:23,861 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 72 transitions. [2023-02-16 02:18:23,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-16 02:18:23,861 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:18:23,861 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:18:23,869 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-16 02:18:24,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:18:24,066 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:18:24,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:18:24,067 INFO L85 PathProgramCache]: Analyzing trace with hash 414140572, now seen corresponding path program 1 times [2023-02-16 02:18:24,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:18:24,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001226473] [2023-02-16 02:18:24,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:18:24,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:18:24,075 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 02:18:24,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [790119827] [2023-02-16 02:18:24,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:18:24,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:18:24,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:18:24,082 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) [2023-02-16 02:18:24,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-16 02:18:24,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:18:24,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-16 02:18:24,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:18:24,206 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-16 02:18:24,206 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 02:18:24,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:18:24,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001226473] [2023-02-16 02:18:24,206 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 02:18:24,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790119827] [2023-02-16 02:18:24,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790119827] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 02:18:24,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 02:18:24,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-16 02:18:24,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805391414] [2023-02-16 02:18:24,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 02:18:24,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-16 02:18:24,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:18:24,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-16 02:18:24,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-16 02:18:24,208 INFO L87 Difference]: Start difference. First operand 56 states and 72 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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) [2023-02-16 02:18:24,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:18:24,238 INFO L93 Difference]: Finished difference Result 72 states and 85 transitions. [2023-02-16 02:18:24,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-16 02:18:24,253 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 28 [2023-02-16 02:18:24,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:18:24,254 INFO L225 Difference]: With dead ends: 72 [2023-02-16 02:18:24,254 INFO L226 Difference]: Without dead ends: 65 [2023-02-16 02:18:24,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-16 02:18:24,255 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 1 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 02:18:24,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 117 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 02:18:24,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-02-16 02:18:24,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2023-02-16 02:18:24,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 44 states have internal predecessors, (49), 15 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-16 02:18:24,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2023-02-16 02:18:24,276 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 28 [2023-02-16 02:18:24,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:18:24,276 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2023-02-16 02:18:24,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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) [2023-02-16 02:18:24,276 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2023-02-16 02:18:24,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-16 02:18:24,277 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:18:24,277 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:18:24,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-16 02:18:24,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:18:24,478 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:18:24,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:18:24,478 INFO L85 PathProgramCache]: Analyzing trace with hash 415868450, now seen corresponding path program 1 times [2023-02-16 02:18:24,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:18:24,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165202457] [2023-02-16 02:18:24,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:18:24,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:18:24,486 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 02:18:24,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1404754985] [2023-02-16 02:18:24,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:18:24,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:18:24,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:18:24,491 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) [2023-02-16 02:18:24,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-16 02:18:24,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:18:24,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-16 02:18:24,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:18:24,699 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-16 02:18:24,700 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 02:18:24,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:18:24,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165202457] [2023-02-16 02:18:24,700 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 02:18:24,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404754985] [2023-02-16 02:18:24,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404754985] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 02:18:24,701 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 02:18:24,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-16 02:18:24,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696155941] [2023-02-16 02:18:24,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 02:18:24,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-16 02:18:24,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:18:24,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-16 02:18:24,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-02-16 02:18:24,702 INFO L87 Difference]: Start difference. First operand 64 states and 77 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 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) [2023-02-16 02:18:24,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:18:24,917 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2023-02-16 02:18:24,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-16 02:18:24,918 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 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 28 [2023-02-16 02:18:24,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:18:24,918 INFO L225 Difference]: With dead ends: 71 [2023-02-16 02:18:24,919 INFO L226 Difference]: Without dead ends: 59 [2023-02-16 02:18:24,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-02-16 02:18:24,920 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 44 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 02:18:24,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 111 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 02:18:24,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-02-16 02:18:24,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2023-02-16 02:18:24,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 41 states have internal predecessors, (45), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2023-02-16 02:18:24,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2023-02-16 02:18:24,932 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 28 [2023-02-16 02:18:24,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:18:24,932 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2023-02-16 02:18:24,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 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) [2023-02-16 02:18:24,932 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2023-02-16 02:18:24,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-16 02:18:24,933 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:18:24,933 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:18:24,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-16 02:18:25,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:18:25,137 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:18:25,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:18:25,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1040101153, now seen corresponding path program 1 times [2023-02-16 02:18:25,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:18:25,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049103027] [2023-02-16 02:18:25,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:18:25,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:18:25,145 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 02:18:25,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1156367220] [2023-02-16 02:18:25,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:18:25,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:18:25,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:18:25,153 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:18:25,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-16 02:18:25,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:18:25,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-16 02:18:25,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:18:25,230 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-16 02:18:25,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:18:25,272 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-16 02:18:25,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:18:25,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049103027] [2023-02-16 02:18:25,273 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 02:18:25,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156367220] [2023-02-16 02:18:25,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156367220] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:18:25,273 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 02:18:25,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2023-02-16 02:18:25,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135732040] [2023-02-16 02:18:25,274 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 02:18:25,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-16 02:18:25,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:18:25,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-16 02:18:25,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-02-16 02:18:25,275 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-16 02:18:25,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:18:25,375 INFO L93 Difference]: Finished difference Result 137 states and 164 transitions. [2023-02-16 02:18:25,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-16 02:18:25,375 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 30 [2023-02-16 02:18:25,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:18:25,376 INFO L225 Difference]: With dead ends: 137 [2023-02-16 02:18:25,377 INFO L226 Difference]: Without dead ends: 114 [2023-02-16 02:18:25,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-02-16 02:18:25,378 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 34 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 02:18:25,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 212 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 02:18:25,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-02-16 02:18:25,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 109. [2023-02-16 02:18:25,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 70 states have (on average 1.1714285714285715) internal successors, (82), 75 states have internal predecessors, (82), 24 states have call successors, (24), 14 states have call predecessors, (24), 14 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2023-02-16 02:18:25,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 126 transitions. [2023-02-16 02:18:25,398 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 126 transitions. Word has length 30 [2023-02-16 02:18:25,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:18:25,398 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 126 transitions. [2023-02-16 02:18:25,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-16 02:18:25,399 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 126 transitions. [2023-02-16 02:18:25,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-16 02:18:25,400 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:18:25,400 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:18:25,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-16 02:18:25,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:18:25,606 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:18:25,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:18:25,606 INFO L85 PathProgramCache]: Analyzing trace with hash 2101649637, now seen corresponding path program 1 times [2023-02-16 02:18:25,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:18:25,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398977207] [2023-02-16 02:18:25,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:18:25,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:18:25,626 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 02:18:25,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [641133308] [2023-02-16 02:18:25,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:18:25,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:18:25,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:18:25,628 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:18:25,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-16 02:18:25,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:18:25,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-16 02:18:25,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:18:25,750 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-16 02:18:25,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:18:25,823 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-02-16 02:18:25,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:18:25,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398977207] [2023-02-16 02:18:25,823 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 02:18:25,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641133308] [2023-02-16 02:18:25,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641133308] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:18:25,823 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 02:18:25,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2023-02-16 02:18:25,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434740500] [2023-02-16 02:18:25,824 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 02:18:25,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-16 02:18:25,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:18:25,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-16 02:18:25,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-02-16 02:18:25,827 INFO L87 Difference]: Start difference. First operand 109 states and 126 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 5 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2023-02-16 02:18:25,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:18:25,937 INFO L93 Difference]: Finished difference Result 162 states and 189 transitions. [2023-02-16 02:18:25,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-16 02:18:25,937 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 5 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 46 [2023-02-16 02:18:25,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:18:25,939 INFO L225 Difference]: With dead ends: 162 [2023-02-16 02:18:25,939 INFO L226 Difference]: Without dead ends: 148 [2023-02-16 02:18:25,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2023-02-16 02:18:25,940 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 49 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 02:18:25,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 206 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 02:18:25,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2023-02-16 02:18:25,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 143. [2023-02-16 02:18:25,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 94 states have (on average 1.1702127659574468) internal successors, (110), 100 states have internal predecessors, (110), 30 states have call successors, (30), 18 states have call predecessors, (30), 18 states have return successors, (26), 24 states have call predecessors, (26), 26 states have call successors, (26) [2023-02-16 02:18:25,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 166 transitions. [2023-02-16 02:18:25,964 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 166 transitions. Word has length 46 [2023-02-16 02:18:25,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:18:25,964 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 166 transitions. [2023-02-16 02:18:25,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 5 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2023-02-16 02:18:25,964 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 166 transitions. [2023-02-16 02:18:25,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-16 02:18:25,965 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:18:25,966 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:18:25,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-16 02:18:26,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:18:26,171 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:18:26,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:18:26,172 INFO L85 PathProgramCache]: Analyzing trace with hash 2103377515, now seen corresponding path program 1 times [2023-02-16 02:18:26,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:18:26,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205250098] [2023-02-16 02:18:26,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:18:26,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:18:26,179 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 02:18:26,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1863944777] [2023-02-16 02:18:26,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:18:26,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:18:26,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:18:26,181 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:18:26,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-16 02:18:26,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:18:26,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-16 02:18:26,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:18:26,515 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-02-16 02:18:26,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:18:27,016 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-02-16 02:18:27,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:18:27,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205250098] [2023-02-16 02:18:27,017 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 02:18:27,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863944777] [2023-02-16 02:18:27,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863944777] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:18:27,017 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 02:18:27,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2023-02-16 02:18:27,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890060867] [2023-02-16 02:18:27,017 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 02:18:27,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-16 02:18:27,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:18:27,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-16 02:18:27,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-02-16 02:18:27,019 INFO L87 Difference]: Start difference. First operand 143 states and 166 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 12 states have internal predecessors, (31), 6 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2023-02-16 02:18:28,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:18:28,558 INFO L93 Difference]: Finished difference Result 195 states and 240 transitions. [2023-02-16 02:18:28,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-16 02:18:28,559 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 12 states have internal predecessors, (31), 6 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 46 [2023-02-16 02:18:28,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:18:28,560 INFO L225 Difference]: With dead ends: 195 [2023-02-16 02:18:28,560 INFO L226 Difference]: Without dead ends: 190 [2023-02-16 02:18:28,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2023-02-16 02:18:28,561 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 88 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-02-16 02:18:28,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 216 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-02-16 02:18:28,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2023-02-16 02:18:28,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 175. [2023-02-16 02:18:28,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 118 states have (on average 1.1864406779661016) internal successors, (140), 123 states have internal predecessors, (140), 36 states have call successors, (36), 20 states have call predecessors, (36), 20 states have return successors, (33), 31 states have call predecessors, (33), 33 states have call successors, (33) [2023-02-16 02:18:28,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 209 transitions. [2023-02-16 02:18:28,607 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 209 transitions. Word has length 46 [2023-02-16 02:18:28,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:18:28,608 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 209 transitions. [2023-02-16 02:18:28,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 12 states have internal predecessors, (31), 6 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2023-02-16 02:18:28,608 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 209 transitions. [2023-02-16 02:18:28,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-02-16 02:18:28,615 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:18:28,615 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:18:28,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-16 02:18:28,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-16 02:18:28,829 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:18:28,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:18:28,830 INFO L85 PathProgramCache]: Analyzing trace with hash 98519191, now seen corresponding path program 1 times [2023-02-16 02:18:28,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:18:28,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963504071] [2023-02-16 02:18:28,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:18:28,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:18:28,848 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 02:18:28,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1247941932] [2023-02-16 02:18:28,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:18:28,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:18:28,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:18:28,849 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:18:28,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-16 02:18:28,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:18:28,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 33 conjunts are in the unsatisfiable core [2023-02-16 02:18:28,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:18:29,391 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-02-16 02:18:29,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:18:34,412 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-02-16 02:18:34,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:18:34,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963504071] [2023-02-16 02:18:34,412 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 02:18:34,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247941932] [2023-02-16 02:18:34,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247941932] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:18:34,413 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 02:18:34,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2023-02-16 02:18:34,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839426974] [2023-02-16 02:18:34,413 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 02:18:34,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-16 02:18:34,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:18:34,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-16 02:18:34,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2023-02-16 02:18:34,415 INFO L87 Difference]: Start difference. First operand 175 states and 209 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 16 states have internal predecessors, (39), 8 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2023-02-16 02:18:41,802 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 [] [2023-02-16 02:18:44,412 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 [] [2023-02-16 02:18:47,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:18:47,463 INFO L93 Difference]: Finished difference Result 266 states and 336 transitions. [2023-02-16 02:18:47,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-16 02:18:47,464 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 16 states have internal predecessors, (39), 8 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 60 [2023-02-16 02:18:47,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:18:47,466 INFO L225 Difference]: With dead ends: 266 [2023-02-16 02:18:47,466 INFO L226 Difference]: Without dead ends: 220 [2023-02-16 02:18:47,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=226, Invalid=830, Unknown=0, NotChecked=0, Total=1056 [2023-02-16 02:18:47,467 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 176 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 188 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2023-02-16 02:18:47,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 212 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 415 Invalid, 2 Unknown, 0 Unchecked, 7.3s Time] [2023-02-16 02:18:47,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2023-02-16 02:18:47,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 186. [2023-02-16 02:18:47,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 127 states have (on average 1.188976377952756) internal successors, (151), 131 states have internal predecessors, (151), 37 states have call successors, (37), 22 states have call predecessors, (37), 21 states have return successors, (34), 32 states have call predecessors, (34), 34 states have call successors, (34) [2023-02-16 02:18:47,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 222 transitions. [2023-02-16 02:18:47,500 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 222 transitions. Word has length 60 [2023-02-16 02:18:47,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:18:47,500 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 222 transitions. [2023-02-16 02:18:47,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 16 states have internal predecessors, (39), 8 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2023-02-16 02:18:47,501 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 222 transitions. [2023-02-16 02:18:47,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-16 02:18:47,501 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:18:47,502 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:18:47,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-16 02:18:47,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:18:47,706 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:18:47,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:18:47,707 INFO L85 PathProgramCache]: Analyzing trace with hash -902942769, now seen corresponding path program 1 times [2023-02-16 02:18:47,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:18:47,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40695528] [2023-02-16 02:18:47,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:18:47,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:18:47,713 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 02:18:47,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [361465616] [2023-02-16 02:18:47,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:18:47,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:18:47,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:18:47,715 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:18:47,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-16 02:18:47,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:18:47,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-16 02:18:47,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:18:48,108 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 37 proven. 21 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-02-16 02:18:48,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:18:48,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:18:48,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40695528] [2023-02-16 02:18:48,298 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 02:18:48,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361465616] [2023-02-16 02:18:48,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361465616] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:18:48,298 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-16 02:18:48,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2023-02-16 02:18:48,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039830973] [2023-02-16 02:18:48,299 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-16 02:18:48,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-16 02:18:48,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:18:48,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-16 02:18:48,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2023-02-16 02:18:48,300 INFO L87 Difference]: Start difference. First operand 186 states and 222 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 6 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2023-02-16 02:18:49,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:18:49,051 INFO L93 Difference]: Finished difference Result 191 states and 226 transitions. [2023-02-16 02:18:49,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-16 02:18:49,052 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 6 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 71 [2023-02-16 02:18:49,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:18:49,056 INFO L225 Difference]: With dead ends: 191 [2023-02-16 02:18:49,056 INFO L226 Difference]: Without dead ends: 186 [2023-02-16 02:18:49,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2023-02-16 02:18:49,057 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 59 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-16 02:18:49,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 159 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-16 02:18:49,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2023-02-16 02:18:49,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2023-02-16 02:18:49,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 127 states have (on average 1.1811023622047243) internal successors, (150), 131 states have internal predecessors, (150), 37 states have call successors, (37), 22 states have call predecessors, (37), 21 states have return successors, (34), 32 states have call predecessors, (34), 34 states have call successors, (34) [2023-02-16 02:18:49,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 221 transitions. [2023-02-16 02:18:49,090 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 221 transitions. Word has length 71 [2023-02-16 02:18:49,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:18:49,090 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 221 transitions. [2023-02-16 02:18:49,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 6 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2023-02-16 02:18:49,091 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 221 transitions. [2023-02-16 02:18:49,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-02-16 02:18:49,092 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:18:49,092 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:18:49,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-16 02:18:49,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-16 02:18:49,298 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:18:49,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:18:49,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1932765757, now seen corresponding path program 2 times [2023-02-16 02:18:49,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:18:49,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112564482] [2023-02-16 02:18:49,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:18:49,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:18:49,306 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 02:18:49,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2027692994] [2023-02-16 02:18:49,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 02:18:49,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:18:49,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:18:49,308 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:18:49,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-16 02:18:49,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 02:18:49,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 02:18:49,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-16 02:18:49,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:18:49,397 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-02-16 02:18:49,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:18:49,476 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-02-16 02:18:49,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:18:49,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112564482] [2023-02-16 02:18:49,477 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 02:18:49,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027692994] [2023-02-16 02:18:49,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027692994] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:18:49,477 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 02:18:49,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2023-02-16 02:18:49,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659568441] [2023-02-16 02:18:49,478 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 02:18:49,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-16 02:18:49,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:18:49,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-16 02:18:49,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-16 02:18:49,479 INFO L87 Difference]: Start difference. First operand 186 states and 221 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-02-16 02:18:49,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:18:49,550 INFO L93 Difference]: Finished difference Result 211 states and 255 transitions. [2023-02-16 02:18:49,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-16 02:18:49,551 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 74 [2023-02-16 02:18:49,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:18:49,553 INFO L225 Difference]: With dead ends: 211 [2023-02-16 02:18:49,553 INFO L226 Difference]: Without dead ends: 162 [2023-02-16 02:18:49,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 142 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-16 02:18:49,555 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 0 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 02:18:49,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 137 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 02:18:49,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2023-02-16 02:18:49,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2023-02-16 02:18:49,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 109 states have (on average 1.1926605504587156) internal successors, (130), 113 states have internal predecessors, (130), 33 states have call successors, (33), 20 states have call predecessors, (33), 19 states have return successors, (30), 28 states have call predecessors, (30), 30 states have call successors, (30) [2023-02-16 02:18:49,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 193 transitions. [2023-02-16 02:18:49,585 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 193 transitions. Word has length 74 [2023-02-16 02:18:49,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:18:49,586 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 193 transitions. [2023-02-16 02:18:49,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-02-16 02:18:49,587 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 193 transitions. [2023-02-16 02:18:49,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-02-16 02:18:49,587 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:18:49,588 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:18:49,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-16 02:18:49,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-16 02:18:49,799 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:18:49,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:18:49,800 INFO L85 PathProgramCache]: Analyzing trace with hash -2111904302, now seen corresponding path program 1 times [2023-02-16 02:18:49,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:18:49,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361880234] [2023-02-16 02:18:49,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:18:49,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:18:49,807 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 02:18:49,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2032932520] [2023-02-16 02:18:49,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:18:49,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:18:49,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:18:49,809 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:18:49,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-16 02:18:49,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:18:49,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-16 02:18:49,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:18:49,904 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-02-16 02:18:49,904 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 02:18:49,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:18:49,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361880234] [2023-02-16 02:18:49,905 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 02:18:49,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032932520] [2023-02-16 02:18:49,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032932520] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 02:18:49,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 02:18:49,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-16 02:18:49,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404856353] [2023-02-16 02:18:49,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 02:18:49,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-16 02:18:49,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:18:49,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-16 02:18:49,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-02-16 02:18:49,907 INFO L87 Difference]: Start difference. First operand 162 states and 193 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-02-16 02:18:49,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:18:49,974 INFO L93 Difference]: Finished difference Result 175 states and 209 transitions. [2023-02-16 02:18:49,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-16 02:18:49,975 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 75 [2023-02-16 02:18:49,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:18:49,977 INFO L225 Difference]: With dead ends: 175 [2023-02-16 02:18:49,977 INFO L226 Difference]: Without dead ends: 165 [2023-02-16 02:18:49,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-02-16 02:18:49,978 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 13 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 02:18:49,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 115 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 02:18:49,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2023-02-16 02:18:50,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 161. [2023-02-16 02:18:50,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 109 states have (on average 1.1743119266055047) internal successors, (128), 111 states have internal predecessors, (128), 32 states have call successors, (32), 19 states have call predecessors, (32), 19 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2023-02-16 02:18:50,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 190 transitions. [2023-02-16 02:18:50,017 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 190 transitions. Word has length 75 [2023-02-16 02:18:50,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:18:50,018 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 190 transitions. [2023-02-16 02:18:50,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-02-16 02:18:50,018 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 190 transitions. [2023-02-16 02:18:50,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-02-16 02:18:50,021 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:18:50,022 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:18:50,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-16 02:18:50,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-02-16 02:18:50,227 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:18:50,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:18:50,227 INFO L85 PathProgramCache]: Analyzing trace with hash 969952380, now seen corresponding path program 2 times [2023-02-16 02:18:50,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:18:50,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868638811] [2023-02-16 02:18:50,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:18:50,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:18:50,232 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 02:18:50,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [238796276] [2023-02-16 02:18:50,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 02:18:50,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:18:50,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:18:50,234 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:18:50,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-16 02:18:50,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-02-16 02:18:50,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 02:18:50,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-16 02:18:50,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:18:50,374 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2023-02-16 02:18:50,375 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 02:18:50,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:18:50,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868638811] [2023-02-16 02:18:50,375 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 02:18:50,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238796276] [2023-02-16 02:18:50,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238796276] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 02:18:50,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 02:18:50,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-16 02:18:50,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482440607] [2023-02-16 02:18:50,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 02:18:50,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-16 02:18:50,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:18:50,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-16 02:18:50,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-16 02:18:50,379 INFO L87 Difference]: Start difference. First operand 161 states and 190 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 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) [2023-02-16 02:18:50,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:18:50,451 INFO L93 Difference]: Finished difference Result 170 states and 199 transitions. [2023-02-16 02:18:50,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-16 02:18:50,452 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 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 84 [2023-02-16 02:18:50,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:18:50,453 INFO L225 Difference]: With dead ends: 170 [2023-02-16 02:18:50,453 INFO L226 Difference]: Without dead ends: 167 [2023-02-16 02:18:50,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-16 02:18:50,454 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 10 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 02:18:50,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 86 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 02:18:50,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2023-02-16 02:18:50,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 165. [2023-02-16 02:18:50,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 111 states have (on average 1.162162162162162) internal successors, (129), 115 states have internal predecessors, (129), 33 states have call successors, (33), 20 states have call predecessors, (33), 20 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2023-02-16 02:18:50,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 193 transitions. [2023-02-16 02:18:50,484 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 193 transitions. Word has length 84 [2023-02-16 02:18:50,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:18:50,484 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 193 transitions. [2023-02-16 02:18:50,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 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) [2023-02-16 02:18:50,485 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 193 transitions. [2023-02-16 02:18:50,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-02-16 02:18:50,487 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:18:50,487 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:18:50,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-16 02:18:50,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-16 02:18:50,692 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:18:50,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:18:50,692 INFO L85 PathProgramCache]: Analyzing trace with hash 31903523, now seen corresponding path program 1 times [2023-02-16 02:18:50,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:18:50,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455234169] [2023-02-16 02:18:50,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:18:50,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:18:50,698 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 02:18:50,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [317870066] [2023-02-16 02:18:50,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:18:50,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:18:50,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:18:50,700 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:18:50,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-16 02:18:50,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:18:50,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-16 02:18:50,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:18:50,861 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 72 proven. 260 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-02-16 02:18:50,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:18:50,934 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 26 proven. 44 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-02-16 02:18:50,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:18:50,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455234169] [2023-02-16 02:18:50,934 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 02:18:50,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317870066] [2023-02-16 02:18:50,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317870066] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:18:50,935 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 02:18:50,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 8 [2023-02-16 02:18:50,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131441859] [2023-02-16 02:18:50,935 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 02:18:50,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-16 02:18:50,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:18:50,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-16 02:18:50,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-02-16 02:18:50,936 INFO L87 Difference]: Start difference. First operand 165 states and 193 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 5 states have call successors, (27), 6 states have call predecessors, (27), 6 states have return successors, (26), 5 states have call predecessors, (26), 5 states have call successors, (26) [2023-02-16 02:18:51,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:18:51,041 INFO L93 Difference]: Finished difference Result 226 states and 276 transitions. [2023-02-16 02:18:51,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-16 02:18:51,041 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 5 states have call successors, (27), 6 states have call predecessors, (27), 6 states have return successors, (26), 5 states have call predecessors, (26), 5 states have call successors, (26) Word has length 89 [2023-02-16 02:18:51,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:18:51,042 INFO L225 Difference]: With dead ends: 226 [2023-02-16 02:18:51,042 INFO L226 Difference]: Without dead ends: 167 [2023-02-16 02:18:51,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 164 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2023-02-16 02:18:51,043 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 10 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 02:18:51,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 168 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 02:18:51,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2023-02-16 02:18:51,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2023-02-16 02:18:51,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 113 states have (on average 1.1592920353982301) internal successors, (131), 117 states have internal predecessors, (131), 33 states have call successors, (33), 20 states have call predecessors, (33), 20 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2023-02-16 02:18:51,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 195 transitions. [2023-02-16 02:18:51,069 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 195 transitions. Word has length 89 [2023-02-16 02:18:51,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:18:51,070 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 195 transitions. [2023-02-16 02:18:51,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 5 states have call successors, (27), 6 states have call predecessors, (27), 6 states have return successors, (26), 5 states have call predecessors, (26), 5 states have call successors, (26) [2023-02-16 02:18:51,070 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 195 transitions. [2023-02-16 02:18:51,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-02-16 02:18:51,071 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:18:51,071 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:18:51,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-16 02:18:51,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:18:51,277 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:18:51,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:18:51,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1316865850, now seen corresponding path program 1 times [2023-02-16 02:18:51,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:18:51,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143875944] [2023-02-16 02:18:51,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:18:51,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:18:51,283 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 02:18:51,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [721975488] [2023-02-16 02:18:51,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:18:51,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:18:51,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:18:51,285 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:18:51,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-16 02:18:51,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:18:51,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-16 02:18:51,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:18:52,164 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 25 proven. 65 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-02-16 02:18:52,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:19:06,469 WARN L233 SmtUtils]: Spent 6.26s on a formula simplification that was a NOOP. DAG size: 148 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-16 02:19:32,455 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 25 proven. 65 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-02-16 02:19:32,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:19:32,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143875944] [2023-02-16 02:19:32,456 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 02:19:32,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721975488] [2023-02-16 02:19:32,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721975488] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:19:32,456 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 02:19:32,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2023-02-16 02:19:32,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497855434] [2023-02-16 02:19:32,456 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 02:19:32,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-16 02:19:32,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:19:32,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-16 02:19:32,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2023-02-16 02:19:32,458 INFO L87 Difference]: Start difference. First operand 167 states and 195 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 23 states have internal predecessors, (56), 13 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 10 states have call predecessors, (26), 11 states have call successors, (26) [2023-02-16 02:19:47,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:19:47,304 INFO L93 Difference]: Finished difference Result 252 states and 320 transitions. [2023-02-16 02:19:47,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-16 02:19:47,304 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 23 states have internal predecessors, (56), 13 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 10 states have call predecessors, (26), 11 states have call successors, (26) Word has length 92 [2023-02-16 02:19:47,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:19:47,305 INFO L225 Difference]: With dead ends: 252 [2023-02-16 02:19:47,305 INFO L226 Difference]: Without dead ends: 205 [2023-02-16 02:19:47,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 158 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=144, Invalid=726, Unknown=0, NotChecked=0, Total=870 [2023-02-16 02:19:47,307 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 53 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2023-02-16 02:19:47,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 265 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 740 Invalid, 0 Unknown, 0 Unchecked, 10.5s Time] [2023-02-16 02:19:47,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2023-02-16 02:19:47,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 178. [2023-02-16 02:19:47,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 118 states have (on average 1.1694915254237288) internal successors, (138), 123 states have internal predecessors, (138), 39 states have call successors, (39), 20 states have call predecessors, (39), 20 states have return successors, (36), 34 states have call predecessors, (36), 36 states have call successors, (36) [2023-02-16 02:19:47,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 213 transitions. [2023-02-16 02:19:47,352 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 213 transitions. Word has length 92 [2023-02-16 02:19:47,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:19:47,353 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 213 transitions. [2023-02-16 02:19:47,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 23 states have internal predecessors, (56), 13 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 10 states have call predecessors, (26), 11 states have call successors, (26) [2023-02-16 02:19:47,353 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 213 transitions. [2023-02-16 02:19:47,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-02-16 02:19:47,354 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:19:47,354 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:19:47,364 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-16 02:19:47,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-02-16 02:19:47,555 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:19:47,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:19:47,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1315137972, now seen corresponding path program 3 times [2023-02-16 02:19:47,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:19:47,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143896326] [2023-02-16 02:19:47,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:19:47,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:19:47,562 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 02:19:47,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1750531457] [2023-02-16 02:19:47,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 02:19:47,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:19:47,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:19:47,567 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:19:47,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-16 02:19:47,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-16 02:19:47,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 02:19:47,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 48 conjunts are in the unsatisfiable core [2023-02-16 02:19:47,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:19:48,168 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 37 proven. 55 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-02-16 02:19:48,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:20:34,970 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 37 proven. 55 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-02-16 02:20:34,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:20:34,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143896326] [2023-02-16 02:20:34,970 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 02:20:34,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750531457] [2023-02-16 02:20:34,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750531457] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:20:34,971 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 02:20:34,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2023-02-16 02:20:34,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181132015] [2023-02-16 02:20:34,971 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 02:20:34,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-16 02:20:34,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:20:34,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-16 02:20:34,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2023-02-16 02:20:34,973 INFO L87 Difference]: Start difference. First operand 178 states and 213 transitions. Second operand has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2023-02-16 02:21:05,307 WARN L233 SmtUtils]: Spent 28.58s on a formula simplification. DAG size of input: 180 DAG size of output: 36 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-16 02:21:10,929 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 [] [2023-02-16 02:21:19,999 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 02:21:23,732 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 02:21:25,755 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 [] [2023-02-16 02:21:28,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:21:28,306 INFO L93 Difference]: Finished difference Result 229 states and 289 transitions. [2023-02-16 02:21:28,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-16 02:21:28,306 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) Word has length 92 [2023-02-16 02:21:28,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:21:28,307 INFO L225 Difference]: With dead ends: 229 [2023-02-16 02:21:28,307 INFO L226 Difference]: Without dead ends: 217 [2023-02-16 02:21:28,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 160 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 45.2s TimeCoverageRelationStatistics Valid=257, Invalid=1148, Unknown=1, NotChecked=0, Total=1406 [2023-02-16 02:21:28,309 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 207 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 900 mSolverCounterSat, 279 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 1183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 900 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.4s IncrementalHoareTripleChecker+Time [2023-02-16 02:21:28,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 292 Invalid, 1183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 900 Invalid, 4 Unknown, 0 Unchecked, 16.4s Time] [2023-02-16 02:21:28,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2023-02-16 02:21:28,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 196. [2023-02-16 02:21:28,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 130 states have (on average 1.1846153846153846) internal successors, (154), 137 states have internal predecessors, (154), 44 states have call successors, (44), 21 states have call predecessors, (44), 21 states have return successors, (42), 37 states have call predecessors, (42), 42 states have call successors, (42) [2023-02-16 02:21:28,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 240 transitions. [2023-02-16 02:21:28,370 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 240 transitions. Word has length 92 [2023-02-16 02:21:28,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:21:28,370 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 240 transitions. [2023-02-16 02:21:28,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2023-02-16 02:21:28,370 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 240 transitions. [2023-02-16 02:21:28,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-02-16 02:21:28,371 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:21:28,371 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:21:28,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-16 02:21:28,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-16 02:21:28,573 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:21:28,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:21:28,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1413893277, now seen corresponding path program 2 times [2023-02-16 02:21:28,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:21:28,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577301155] [2023-02-16 02:21:28,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:21:28,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:21:28,582 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 02:21:28,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1629872372] [2023-02-16 02:21:28,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 02:21:28,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:21:28,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:21:28,584 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:21:28,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-16 02:21:28,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 02:21:28,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2023-02-16 02:21:28,743 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-16 02:21:28,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-16 02:21:28,812 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-16 02:21:28,813 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-02-16 02:21:28,813 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-02-16 02:21:28,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-16 02:21:29,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:21:29,023 INFO L445 BasicCegarLoop]: Path program histogram: [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:21:29,026 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-02-16 02:21:29,065 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.02 02:21:29 BoogieIcfgContainer [2023-02-16 02:21:29,065 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-02-16 02:21:29,066 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-02-16 02:21:29,066 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-02-16 02:21:29,066 INFO L275 PluginConnector]: Witness Printer initialized [2023-02-16 02:21:29,066 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 02:18:21" (3/4) ... [2023-02-16 02:21:29,068 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-02-16 02:21:29,116 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-02-16 02:21:29,116 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-02-16 02:21:29,117 INFO L158 Benchmark]: Toolchain (without parser) took 188081.55ms. Allocated memory was 111.1MB in the beginning and 134.2MB in the end (delta: 23.1MB). Free memory was 62.9MB in the beginning and 43.3MB in the end (delta: 19.5MB). Peak memory consumption was 43.1MB. Max. memory is 16.1GB. [2023-02-16 02:21:29,117 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 92.3MB. Free memory was 62.4MB in the beginning and 62.3MB in the end (delta: 76.9kB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-16 02:21:29,117 INFO L158 Benchmark]: CACSL2BoogieTranslator took 262.74ms. Allocated memory is still 111.1MB. Free memory was 62.4MB in the beginning and 81.2MB in the end (delta: -18.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-02-16 02:21:29,118 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.33ms. Allocated memory is still 111.1MB. Free memory was 81.2MB in the beginning and 79.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-16 02:21:29,118 INFO L158 Benchmark]: Boogie Preprocessor took 29.24ms. Allocated memory is still 111.1MB. Free memory was 79.7MB in the beginning and 78.4MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-16 02:21:29,118 INFO L158 Benchmark]: RCFGBuilder took 316.98ms. Allocated memory is still 111.1MB. Free memory was 78.4MB in the beginning and 67.7MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-02-16 02:21:29,118 INFO L158 Benchmark]: TraceAbstraction took 187392.32ms. Allocated memory was 111.1MB in the beginning and 134.2MB in the end (delta: 23.1MB). Free memory was 66.5MB in the beginning and 47.5MB in the end (delta: 19.0MB). Peak memory consumption was 44.3MB. Max. memory is 16.1GB. [2023-02-16 02:21:29,119 INFO L158 Benchmark]: Witness Printer took 50.73ms. Allocated memory is still 134.2MB. Free memory was 47.5MB in the beginning and 43.3MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-02-16 02:21:29,120 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 92.3MB. Free memory was 62.4MB in the beginning and 62.3MB in the end (delta: 76.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 262.74ms. Allocated memory is still 111.1MB. Free memory was 62.4MB in the beginning and 81.2MB in the end (delta: -18.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 22.33ms. Allocated memory is still 111.1MB. Free memory was 81.2MB in the beginning and 79.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 29.24ms. Allocated memory is still 111.1MB. Free memory was 79.7MB in the beginning and 78.4MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 316.98ms. Allocated memory is still 111.1MB. Free memory was 78.4MB in the beginning and 67.7MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 187392.32ms. Allocated memory was 111.1MB in the beginning and 134.2MB in the end (delta: 23.1MB). Free memory was 66.5MB in the beginning and 47.5MB in the end (delta: 19.0MB). Peak memory consumption was 44.3MB. Max. memory is 16.1GB. * Witness Printer took 50.73ms. Allocated memory is still 134.2MB. Free memory was 47.5MB in the beginning and 43.3MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 17]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; VAL [counter=0] [L24] unsigned int A, B; [L25] long long r, d, p, q; [L26] A = __VERIFIER_nondet_uint() [L27] B = __VERIFIER_nondet_uint() [L28] CALL assume_abort_if_not(B >= 1) [L12] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1, counter=0] [L28] RET assume_abort_if_not(B >= 1) [L30] r = A [L31] d = B [L32] p = 1 [L33] q = 0 VAL [A=4, B=-4294967295, counter=0, d=1, p=1, q=0, r=4] [L35] EXPR counter++ VAL [A=4, B=-4294967295, counter=1, counter++=0, d=1, p=1, q=0, r=4] [L35] COND TRUE counter++<5 [L36] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L36] RET __VERIFIER_assert(q == 0) VAL [A=4, B=-4294967295, counter=1, d=1, p=1, q=0, r=4] [L37] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L37] RET __VERIFIER_assert(r == A) VAL [A=4, B=-4294967295, counter=1, d=1, p=1, q=0, r=4] [L38] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L38] RET __VERIFIER_assert(d == B * p) VAL [A=4, B=-4294967295, counter=1, d=1, p=1, q=0, r=4] [L39] COND FALSE !(!(r >= d)) [L41] d = 2 * d [L42] p = 2 * p VAL [A=4, B=-4294967295, counter=1, d=2, p=2, q=0, r=4] [L35] EXPR counter++ VAL [A=4, B=-4294967295, counter=2, counter++=1, d=2, p=2, q=0, r=4] [L35] COND TRUE counter++<5 [L36] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L36] RET __VERIFIER_assert(q == 0) VAL [A=4, B=-4294967295, counter=2, d=2, p=2, q=0, r=4] [L37] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L37] RET __VERIFIER_assert(r == A) VAL [A=4, B=-4294967295, counter=2, d=2, p=2, q=0, r=4] [L38] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L38] RET __VERIFIER_assert(d == B * p) VAL [A=4, B=-4294967295, counter=2, d=2, p=2, q=0, r=4] [L39] COND FALSE !(!(r >= d)) [L41] d = 2 * d [L42] p = 2 * p VAL [A=4, B=-4294967295, counter=2, d=4, p=4, q=0, r=4] [L35] EXPR counter++ VAL [A=4, B=-4294967295, counter=3, counter++=2, d=4, p=4, q=0, r=4] [L35] COND TRUE counter++<5 [L36] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L36] RET __VERIFIER_assert(q == 0) VAL [A=4, B=-4294967295, counter=3, d=4, p=4, q=0, r=4] [L37] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L37] RET __VERIFIER_assert(r == A) VAL [A=4, B=-4294967295, counter=3, d=4, p=4, q=0, r=4] [L38] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L38] RET __VERIFIER_assert(d == B * p) VAL [A=4, B=-4294967295, counter=3, d=4, p=4, q=0, r=4] [L39] COND FALSE !(!(r >= d)) [L41] d = 2 * d [L42] p = 2 * p VAL [A=4, B=-4294967295, counter=3, d=8, p=8, q=0, r=4] [L35] EXPR counter++ VAL [A=4, B=-4294967295, counter=4, counter++=3, d=8, p=8, q=0, r=4] [L35] COND TRUE counter++<5 [L36] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L36] RET __VERIFIER_assert(q == 0) VAL [A=4, B=-4294967295, counter=4, d=8, p=8, q=0, r=4] [L37] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L37] RET __VERIFIER_assert(r == A) VAL [A=4, B=-4294967295, counter=4, d=8, p=8, q=0, r=4] [L38] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L38] RET __VERIFIER_assert(d == B * p) VAL [A=4, B=-4294967295, counter=4, d=8, p=8, q=0, r=4] [L39] COND TRUE !(r >= d) VAL [A=4, B=-4294967295, counter=4, d=8, p=8, q=0, r=4] [L45] EXPR counter++ VAL [A=4, B=-4294967295, counter=5, counter++=4, d=8, p=8, q=0, r=4] [L45] COND TRUE counter++<5 [L46] CALL __VERIFIER_assert(A == q*B + r) VAL [\old(cond)=1, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L46] RET __VERIFIER_assert(A == q*B + r) VAL [A=4, B=-4294967295, counter=5, d=8, p=8, q=0, r=4] [L47] CALL __VERIFIER_assert(d == B*p) VAL [\old(cond)=1, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L47] RET __VERIFIER_assert(d == B*p) VAL [A=4, B=-4294967295, counter=5, d=8, p=8, q=0, r=4] [L49] COND FALSE !(!(p != 1)) [L51] d = d / 2 [L52] p = p / 2 VAL [A=4, B=-4294967295, counter=5, d=4, p=4, q=0, r=4] [L53] COND TRUE r >= d [L54] r = r - d [L55] q = q + p VAL [A=4, B=-4294967295, counter=5, d=4, p=4, q=4, r=0] [L45] EXPR counter++ VAL [A=4, B=-4294967295, counter=6, counter++=5, d=4, p=4, q=4, r=0] [L45] COND FALSE !(counter++<5) [L59] CALL __VERIFIER_assert(A == d*q + r) VAL [\old(cond)=0, counter=6] [L15] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=6] [L17] reach_error() VAL [\old(cond)=0, cond=0, counter=6] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 187.3s, OverallIterations: 19, TraceHistogramMax: 15, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 84.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 6 mSolverCounterUnknown, 849 SdHoareTripleChecker+Valid, 36.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 811 mSDsluCounter, 2704 SdHoareTripleChecker+Invalid, 36.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1996 mSDsCounter, 744 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3441 IncrementalHoareTripleChecker+Invalid, 4191 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 744 mSolverCounterUnsat, 708 mSDtfsCounter, 3441 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1486 GetRequests, 1261 SyntacticMatches, 12 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 791 ImplicationChecksByTransitivity, 68.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=196occurred in iteration=18, InterpolantAutomatonStates: 172, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 18 MinimizatonAttempts, 133 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 96.9s InterpolantComputationTime, 1000 NumberOfCodeBlocks, 900 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 1404 ConstructedInterpolants, 0 QuantifiedInterpolants, 31574 SizeOfPredicates, 53 NumberOfNonLiveVariables, 2083 ConjunctsInSsa, 265 ConjunctsInUnsatCore, 27 InterpolantComputations, 8 PerfectInterpolantSequences, 3474/4151 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-02-16 02:21:29,223 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE