./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound100.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 26d01a9c 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/divbin_unwindbound100.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash aca8f035d06c0b5071d069d3e7dfc8602e7f38b097f4966dbc919eb2aff21501 --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-18 01:43:08,513 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 01:43:08,515 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 01:43:08,553 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 01:43:08,554 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 01:43:08,556 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 01:43:08,558 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 01:43:08,560 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 01:43:08,562 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 01:43:08,566 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 01:43:08,568 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 01:43:08,569 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 01:43:08,570 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 01:43:08,572 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 01:43:08,573 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 01:43:08,575 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 01:43:08,576 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 01:43:08,577 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 01:43:08,578 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 01:43:08,583 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 01:43:08,584 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 01:43:08,585 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 01:43:08,586 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 01:43:08,587 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 01:43:08,594 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 01:43:08,595 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 01:43:08,596 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 01:43:08,598 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 01:43:08,598 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 01:43:08,599 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 01:43:08,599 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 01:43:08,600 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 01:43:08,601 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 01:43:08,602 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 01:43:08,603 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 01:43:08,603 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 01:43:08,603 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 01:43:08,604 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 01:43:08,604 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 01:43:08,605 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 01:43:08,606 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 01:43:08,607 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-18 01:43:08,632 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 01:43:08,632 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 01:43:08,633 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 01:43:08,633 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 01:43:08,634 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 01:43:08,634 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 01:43:08,634 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 01:43:08,635 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 01:43:08,635 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 01:43:08,635 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 01:43:08,636 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 01:43:08,636 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 01:43:08,636 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 01:43:08,636 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 01:43:08,636 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-18 01:43:08,637 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 01:43:08,637 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-18 01:43:08,637 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 01:43:08,637 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 01:43:08,637 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 01:43:08,637 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-18 01:43:08,638 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 01:43:08,638 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 01:43:08,638 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 01:43:08,638 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 01:43:08,638 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 01:43:08,639 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 01:43:08,639 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-18 01:43:08,639 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 01:43:08,639 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 01:43:08,639 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 01:43:08,639 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-18 01:43:08,640 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 01:43:08,640 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 01:43:08,640 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 01:43:08,640 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aca8f035d06c0b5071d069d3e7dfc8602e7f38b097f4966dbc919eb2aff21501 [2023-02-18 01:43:08,836 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 01:43:08,859 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 01:43:08,861 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 01:43:08,862 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 01:43:08,862 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 01:43:08,863 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound100.i [2023-02-18 01:43:09,963 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 01:43:10,169 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 01:43:10,169 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound100.i [2023-02-18 01:43:10,175 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91abdb1fc/72e01ad7f03c49409d8eb870ba02b616/FLAGf4fdd79e8 [2023-02-18 01:43:10,186 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91abdb1fc/72e01ad7f03c49409d8eb870ba02b616 [2023-02-18 01:43:10,187 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 01:43:10,188 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 01:43:10,189 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 01:43:10,190 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 01:43:10,198 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 01:43:10,199 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 01:43:10" (1/1) ... [2023-02-18 01:43:10,200 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45174bcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:43:10, skipping insertion in model container [2023-02-18 01:43:10,200 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 01:43:10" (1/1) ... [2023-02-18 01:43:10,206 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 01:43:10,219 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 01:43:10,334 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/divbin_unwindbound100.i[950,963] [2023-02-18 01:43:10,347 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 01:43:10,355 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 01:43:10,366 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/divbin_unwindbound100.i[950,963] [2023-02-18 01:43:10,380 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 01:43:10,391 INFO L208 MainTranslator]: Completed translation [2023-02-18 01:43:10,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:43:10 WrapperNode [2023-02-18 01:43:10,392 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 01:43:10,393 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 01:43:10,393 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 01:43:10,393 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 01:43:10,397 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:43:10" (1/1) ... [2023-02-18 01:43:10,403 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:43:10" (1/1) ... [2023-02-18 01:43:10,419 INFO L138 Inliner]: procedures = 16, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 54 [2023-02-18 01:43:10,419 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 01:43:10,420 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 01:43:10,420 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 01:43:10,420 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 01:43:10,427 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:43:10" (1/1) ... [2023-02-18 01:43:10,428 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:43:10" (1/1) ... [2023-02-18 01:43:10,438 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:43:10" (1/1) ... [2023-02-18 01:43:10,439 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:43:10" (1/1) ... [2023-02-18 01:43:10,443 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:43:10" (1/1) ... [2023-02-18 01:43:10,450 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:43:10" (1/1) ... [2023-02-18 01:43:10,453 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:43:10" (1/1) ... [2023-02-18 01:43:10,454 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:43:10" (1/1) ... [2023-02-18 01:43:10,456 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 01:43:10,456 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 01:43:10,457 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 01:43:10,457 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 01:43:10,457 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:43:10" (1/1) ... [2023-02-18 01:43:10,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 01:43:10,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:43:10,489 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) [2023-02-18 01:43:10,490 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 [2023-02-18 01:43:10,519 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 01:43:10,519 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-18 01:43:10,520 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-18 01:43:10,520 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 01:43:10,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 01:43:10,523 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 01:43:10,523 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-18 01:43:10,523 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-18 01:43:10,570 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 01:43:10,572 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 01:43:10,737 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 01:43:10,750 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 01:43:10,750 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-18 01:43:10,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 01:43:10 BoogieIcfgContainer [2023-02-18 01:43:10,764 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 01:43:10,766 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 01:43:10,767 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 01:43:10,769 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 01:43:10,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 01:43:10" (1/3) ... [2023-02-18 01:43:10,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@216f5ba2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 01:43:10, skipping insertion in model container [2023-02-18 01:43:10,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:43:10" (2/3) ... [2023-02-18 01:43:10,771 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@216f5ba2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 01:43:10, skipping insertion in model container [2023-02-18 01:43:10,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 01:43:10" (3/3) ... [2023-02-18 01:43:10,772 INFO L112 eAbstractionObserver]: Analyzing ICFG divbin_unwindbound100.i [2023-02-18 01:43:10,786 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 01:43:10,786 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-18 01:43:10,823 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 01:43:10,828 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;@c33e7d8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 01:43:10,828 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-18 01:43:10,832 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-18 01:43:10,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-18 01:43:10,838 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:43:10,838 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:43:10,839 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:43:10,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:43:10,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1267887399, now seen corresponding path program 1 times [2023-02-18 01:43:10,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:43:10,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179829740] [2023-02-18 01:43:10,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:43:10,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:43:10,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 01:43:10,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 01:43:10,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179829740] [2023-02-18 01:43:10,955 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-18 01:43:10,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979492244] [2023-02-18 01:43:10,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:43:10,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:43:10,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:43:10,960 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) [2023-02-18 01:43:10,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-18 01:43:11,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 01:43:11,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-18 01:43:11,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 01:43:11,077 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 01:43:11,077 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 01:43:11,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979492244] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 01:43:11,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 01:43:11,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 01:43:11,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990890470] [2023-02-18 01:43:11,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 01:43:11,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-18 01:43:11,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 01:43:11,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-18 01:43:11,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 01:43:11,143 INFO L87 Difference]: Start difference. First operand has 28 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 01:43:11,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 01:43:11,171 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2023-02-18 01:43:11,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-18 01:43:11,173 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2023-02-18 01:43:11,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 01:43:11,186 INFO L225 Difference]: With dead ends: 53 [2023-02-18 01:43:11,186 INFO L226 Difference]: Without dead ends: 24 [2023-02-18 01:43:11,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 01:43:11,194 INFO L413 NwaCegarLoop]: 34 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, 34 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 [2023-02-18 01:43:11,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 01:43:11,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-02-18 01:43:11,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-02-18 01:43:11,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 01:43:11,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2023-02-18 01:43:11,235 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 19 [2023-02-18 01:43:11,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 01:43:11,235 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2023-02-18 01:43:11,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 01:43:11,236 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2023-02-18 01:43:11,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-18 01:43:11,237 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:43:11,237 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:43:11,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-18 01:43:11,444 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 [2023-02-18 01:43:11,444 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:43:11,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:43:11,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1485611193, now seen corresponding path program 1 times [2023-02-18 01:43:11,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:43:11,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121129195] [2023-02-18 01:43:11,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:43:11,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:43:11,461 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 01:43:11,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [648263872] [2023-02-18 01:43:11,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:43:11,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:43:11,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:43:11,464 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) [2023-02-18 01:43:11,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-18 01:43:11,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 01:43:11,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-18 01:43:11,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 01:43:11,575 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 01:43:11,576 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 01:43:11,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 01:43:11,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121129195] [2023-02-18 01:43:11,578 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 01:43:11,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648263872] [2023-02-18 01:43:11,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648263872] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 01:43:11,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 01:43:11,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 01:43:11,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305544240] [2023-02-18 01:43:11,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 01:43:11,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 01:43:11,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 01:43:11,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 01:43:11,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 01:43:11,587 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-18 01:43:11,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 01:43:11,613 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2023-02-18 01:43:11,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 01:43:11,614 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2023-02-18 01:43:11,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 01:43:11,615 INFO L225 Difference]: With dead ends: 38 [2023-02-18 01:43:11,616 INFO L226 Difference]: Without dead ends: 26 [2023-02-18 01:43:11,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 01:43:11,617 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 71 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 [2023-02-18 01:43:11,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 71 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 01:43:11,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-02-18 01:43:11,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-02-18 01:43:11,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 01:43:11,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2023-02-18 01:43:11,631 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 21 [2023-02-18 01:43:11,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 01:43:11,636 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2023-02-18 01:43:11,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-18 01:43:11,637 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2023-02-18 01:43:11,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-18 01:43:11,637 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:43:11,638 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:43:11,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-18 01:43:11,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-02-18 01:43:11,839 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:43:11,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:43:11,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1580975129, now seen corresponding path program 1 times [2023-02-18 01:43:11,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:43:11,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356347545] [2023-02-18 01:43:11,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:43:11,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:43:11,853 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 01:43:11,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1323421631] [2023-02-18 01:43:11,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:43:11,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:43:11,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:43:11,856 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) [2023-02-18 01:43:11,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-18 01:43:11,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 01:43:11,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-18 01:43:11,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 01:43:12,136 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 01:43:12,136 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 01:43:12,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 01:43:12,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356347545] [2023-02-18 01:43:12,137 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 01:43:12,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323421631] [2023-02-18 01:43:12,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323421631] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 01:43:12,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 01:43:12,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-18 01:43:12,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603539653] [2023-02-18 01:43:12,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 01:43:12,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-18 01:43:12,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 01:43:12,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-18 01:43:12,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-02-18 01:43:12,139 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 01:43:12,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 01:43:12,293 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2023-02-18 01:43:12,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-18 01:43:12,294 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2023-02-18 01:43:12,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 01:43:12,295 INFO L225 Difference]: With dead ends: 38 [2023-02-18 01:43:12,295 INFO L226 Difference]: Without dead ends: 35 [2023-02-18 01:43:12,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-02-18 01:43:12,297 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 31 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 01:43:12,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 122 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 01:43:12,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-02-18 01:43:12,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-02-18 01:43:12,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-18 01:43:12,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2023-02-18 01:43:12,308 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 22 [2023-02-18 01:43:12,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 01:43:12,308 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2023-02-18 01:43:12,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 01:43:12,309 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2023-02-18 01:43:12,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-18 01:43:12,310 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:43:12,310 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:43:12,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-18 01:43:12,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:43:12,517 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:43:12,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:43:12,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1106421036, now seen corresponding path program 1 times [2023-02-18 01:43:12,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:43:12,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781057486] [2023-02-18 01:43:12,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:43:12,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:43:12,535 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 01:43:12,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [734229776] [2023-02-18 01:43:12,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:43:12,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:43:12,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:43:12,537 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) [2023-02-18 01:43:12,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-18 01:43:12,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 01:43:12,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-18 01:43:12,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 01:43:12,636 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 01:43:12,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 01:43:12,674 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 01:43:12,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 01:43:12,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781057486] [2023-02-18 01:43:12,681 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 01:43:12,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734229776] [2023-02-18 01:43:12,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734229776] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 01:43:12,682 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 01:43:12,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2023-02-18 01:43:12,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350993719] [2023-02-18 01:43:12,682 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 01:43:12,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-18 01:43:12,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 01:43:12,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-18 01:43:12,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-02-18 01:43:12,685 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-18 01:43:12,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 01:43:12,753 INFO L93 Difference]: Finished difference Result 69 states and 88 transitions. [2023-02-18 01:43:12,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-18 01:43:12,754 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 24 [2023-02-18 01:43:12,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 01:43:12,755 INFO L225 Difference]: With dead ends: 69 [2023-02-18 01:43:12,755 INFO L226 Difference]: Without dead ends: 57 [2023-02-18 01:43:12,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-02-18 01:43:12,758 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 29 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 01:43:12,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 139 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 01:43:12,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-02-18 01:43:12,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 43. [2023-02-18 01:43:12,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 35 states have internal predecessors, (43), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-18 01:43:12,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2023-02-18 01:43:12,778 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 24 [2023-02-18 01:43:12,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 01:43:12,780 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2023-02-18 01:43:12,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-18 01:43:12,781 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2023-02-18 01:43:12,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-18 01:43:12,781 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:43:12,782 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:43:12,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-18 01:43:12,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:43:12,988 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:43:12,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:43:12,989 INFO L85 PathProgramCache]: Analyzing trace with hash -450968108, now seen corresponding path program 1 times [2023-02-18 01:43:12,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:43:12,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606911105] [2023-02-18 01:43:12,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:43:12,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:43:13,008 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 01:43:13,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1449605869] [2023-02-18 01:43:13,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:43:13,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:43:13,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:43:13,013 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) [2023-02-18 01:43:13,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-18 01:43:13,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 01:43:13,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-18 01:43:13,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 01:43:13,076 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-18 01:43:13,076 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 01:43:13,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 01:43:13,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606911105] [2023-02-18 01:43:13,076 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 01:43:13,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449605869] [2023-02-18 01:43:13,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449605869] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 01:43:13,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 01:43:13,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 01:43:13,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794348716] [2023-02-18 01:43:13,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 01:43:13,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 01:43:13,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 01:43:13,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 01:43:13,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 01:43:13,079 INFO L87 Difference]: Start difference. First operand 43 states and 52 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, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-18 01:43:13,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 01:43:13,118 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2023-02-18 01:43:13,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 01:43:13,118 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, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2023-02-18 01:43:13,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 01:43:13,119 INFO L225 Difference]: With dead ends: 55 [2023-02-18 01:43:13,119 INFO L226 Difference]: Without dead ends: 52 [2023-02-18 01:43:13,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-18 01:43:13,121 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 9 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 01:43:13,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 81 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 01:43:13,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-02-18 01:43:13,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 44. [2023-02-18 01:43:13,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 36 states have internal predecessors, (45), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-18 01:43:13,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2023-02-18 01:43:13,129 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 25 [2023-02-18 01:43:13,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 01:43:13,129 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2023-02-18 01:43:13,129 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, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-18 01:43:13,129 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2023-02-18 01:43:13,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-18 01:43:13,130 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:43:13,130 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:43:13,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-18 01:43:13,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:43:13,337 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:43:13,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:43:13,338 INFO L85 PathProgramCache]: Analyzing trace with hash -791365823, now seen corresponding path program 1 times [2023-02-18 01:43:13,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:43:13,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582807126] [2023-02-18 01:43:13,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:43:13,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:43:13,348 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 01:43:13,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [518748110] [2023-02-18 01:43:13,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:43:13,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:43:13,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:43:13,361 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) [2023-02-18 01:43:13,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-18 01:43:13,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 01:43:13,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-18 01:43:13,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 01:43:13,414 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 01:43:13,414 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 01:43:13,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 01:43:13,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582807126] [2023-02-18 01:43:13,415 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 01:43:13,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518748110] [2023-02-18 01:43:13,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518748110] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 01:43:13,415 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 01:43:13,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 01:43:13,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109311701] [2023-02-18 01:43:13,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 01:43:13,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 01:43:13,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 01:43:13,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 01:43:13,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 01:43:13,417 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-18 01:43:13,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 01:43:13,435 INFO L93 Difference]: Finished difference Result 69 states and 84 transitions. [2023-02-18 01:43:13,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 01:43:13,436 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2023-02-18 01:43:13,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 01:43:13,436 INFO L225 Difference]: With dead ends: 69 [2023-02-18 01:43:13,437 INFO L226 Difference]: Without dead ends: 44 [2023-02-18 01:43:13,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 01:43:13,438 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 01:43:13,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 01:43:13,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-02-18 01:43:13,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-02-18 01:43:13,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 36 states have internal predecessors, (44), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-18 01:43:13,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2023-02-18 01:43:13,449 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 31 [2023-02-18 01:43:13,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 01:43:13,449 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2023-02-18 01:43:13,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-18 01:43:13,449 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2023-02-18 01:43:13,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-18 01:43:13,454 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:43:13,454 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:43:13,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-18 01:43:13,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:43:13,655 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:43:13,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:43:13,656 INFO L85 PathProgramCache]: Analyzing trace with hash 675416052, now seen corresponding path program 1 times [2023-02-18 01:43:13,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:43:13,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027123030] [2023-02-18 01:43:13,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:43:13,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:43:13,672 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 01:43:13,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [266284153] [2023-02-18 01:43:13,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:43:13,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:43:13,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:43:13,689 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) [2023-02-18 01:43:13,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-18 01:43:13,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 01:43:13,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-18 01:43:13,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 01:43:13,827 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-18 01:43:13,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 01:43:19,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 01:43:19,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027123030] [2023-02-18 01:43:19,974 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 01:43:19,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266284153] [2023-02-18 01:43:19,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266284153] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 01:43:19,975 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 01:43:19,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2023-02-18 01:43:19,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923458680] [2023-02-18 01:43:19,975 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 01:43:19,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 01:43:19,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 01:43:19,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 01:43:19,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=81, Unknown=3, NotChecked=0, Total=110 [2023-02-18 01:43:19,977 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-18 01:43:20,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 01:43:20,064 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2023-02-18 01:43:20,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 01:43:20,065 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 34 [2023-02-18 01:43:20,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 01:43:20,068 INFO L225 Difference]: With dead ends: 55 [2023-02-18 01:43:20,068 INFO L226 Difference]: Without dead ends: 52 [2023-02-18 01:43:20,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=32, Invalid=97, Unknown=3, NotChecked=0, Total=132 [2023-02-18 01:43:20,072 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 9 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 01:43:20,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 102 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 01:43:20,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-02-18 01:43:20,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2023-02-18 01:43:20,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 42 states have internal predecessors, (50), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-18 01:43:20,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2023-02-18 01:43:20,080 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 34 [2023-02-18 01:43:20,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 01:43:20,080 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2023-02-18 01:43:20,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-18 01:43:20,085 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2023-02-18 01:43:20,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-18 01:43:20,088 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:43:20,089 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:43:20,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-18 01:43:20,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:43:20,296 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:43:20,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:43:20,296 INFO L85 PathProgramCache]: Analyzing trace with hash 886516180, now seen corresponding path program 2 times [2023-02-18 01:43:20,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:43:20,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176848350] [2023-02-18 01:43:20,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:43:20,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:43:20,329 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 01:43:20,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [407693528] [2023-02-18 01:43:20,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 01:43:20,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:43:20,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:43:20,335 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) [2023-02-18 01:43:20,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-18 01:43:20,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 01:43:20,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 01:43:20,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-18 01:43:20,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 01:43:33,439 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-18 01:43:33,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 01:43:33,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 01:43:33,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176848350] [2023-02-18 01:43:33,858 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 01:43:33,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407693528] [2023-02-18 01:43:33,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407693528] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 01:43:33,858 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 01:43:33,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2023-02-18 01:43:33,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319672982] [2023-02-18 01:43:33,858 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 01:43:33,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-18 01:43:33,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 01:43:33,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-18 01:43:33,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2023-02-18 01:43:33,860 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand has 11 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-18 01:43:34,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 01:43:34,059 INFO L93 Difference]: Finished difference Result 90 states and 106 transitions. [2023-02-18 01:43:34,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-18 01:43:34,061 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 43 [2023-02-18 01:43:34,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 01:43:34,062 INFO L225 Difference]: With dead ends: 90 [2023-02-18 01:43:34,062 INFO L226 Difference]: Without dead ends: 52 [2023-02-18 01:43:34,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-02-18 01:43:34,063 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 28 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 01:43:34,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 133 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 01:43:34,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-02-18 01:43:34,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2023-02-18 01:43:34,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 42 states have internal predecessors, (49), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-18 01:43:34,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2023-02-18 01:43:34,071 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 43 [2023-02-18 01:43:34,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 01:43:34,072 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2023-02-18 01:43:34,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-18 01:43:34,072 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2023-02-18 01:43:34,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-18 01:43:34,075 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:43:34,075 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:43:34,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-18 01:43:34,281 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,SelfDestructingSolverStorable7 [2023-02-18 01:43:34,281 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:43:34,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:43:34,282 INFO L85 PathProgramCache]: Analyzing trace with hash -2006317561, now seen corresponding path program 3 times [2023-02-18 01:43:34,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:43:34,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536807780] [2023-02-18 01:43:34,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:43:34,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:43:34,300 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 01:43:34,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [776323949] [2023-02-18 01:43:34,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 01:43:34,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:43:34,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:43:34,305 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) [2023-02-18 01:43:34,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-18 01:43:48,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-18 01:43:48,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 01:43:48,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 47 conjunts are in the unsatisfiable core [2023-02-18 01:43:48,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 01:43:58,583 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 01:43:58,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 01:44:56,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 01:44:56,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536807780] [2023-02-18 01:44:56,727 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 01:44:56,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776323949] [2023-02-18 01:44:56,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776323949] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 01:44:56,727 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 01:44:56,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2023-02-18 01:44:56,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101879005] [2023-02-18 01:44:56,727 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 01:44:56,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-18 01:44:56,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 01:44:56,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-18 01:44:56,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=489, Unknown=13, NotChecked=0, Total=600 [2023-02-18 01:44:56,729 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 15 states have internal predecessors, (37), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-18 01:45:12,564 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 [0] [2023-02-18 01:45:14,885 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 01:45:16,025 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 01:45:18,030 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 01:45:21,666 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 01:45:23,462 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 01:45:25,112 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 01:45:26,354 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 01:45:27,397 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 01:45:28,849 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 01:45:30,398 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 01:45:32,407 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 01:45:35,159 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-02-18 01:45:37,205 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-02-18 01:45:37,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 01:45:37,299 INFO L93 Difference]: Finished difference Result 90 states and 105 transitions. [2023-02-18 01:45:37,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-18 01:45:37,300 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 15 states have internal predecessors, (37), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 46 [2023-02-18 01:45:37,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 01:45:37,302 INFO L225 Difference]: With dead ends: 90 [2023-02-18 01:45:37,302 INFO L226 Difference]: Without dead ends: 84 [2023-02-18 01:45:37,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 60.4s TimeCoverageRelationStatistics Valid=130, Invalid=725, Unknown=15, NotChecked=0, Total=870 [2023-02-18 01:45:37,303 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 38 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 14 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.1s IncrementalHoareTripleChecker+Time [2023-02-18 01:45:37,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 334 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 430 Invalid, 6 Unknown, 0 Unchecked, 28.1s Time] [2023-02-18 01:45:37,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-02-18 01:45:37,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 80. [2023-02-18 01:45:37,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 62 states have (on average 1.1612903225806452) internal successors, (72), 65 states have internal predecessors, (72), 10 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-18 01:45:37,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 91 transitions. [2023-02-18 01:45:37,320 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 91 transitions. Word has length 46 [2023-02-18 01:45:37,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 01:45:37,320 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 91 transitions. [2023-02-18 01:45:37,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 15 states have internal predecessors, (37), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-18 01:45:37,321 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 91 transitions. [2023-02-18 01:45:37,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-18 01:45:37,322 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:45:37,322 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:45:37,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-18 01:45:37,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:45:37,522 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:45:37,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:45:37,523 INFO L85 PathProgramCache]: Analyzing trace with hash 397465844, now seen corresponding path program 4 times [2023-02-18 01:45:37,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:45:37,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671167001] [2023-02-18 01:45:37,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:45:37,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:45:37,545 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 01:45:37,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1298462543] [2023-02-18 01:45:37,546 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 01:45:37,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:45:37,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:45:37,547 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) [2023-02-18 01:45:37,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-18 01:45:39,534 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 01:45:39,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 01:45:39,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 49 conjunts are in the unsatisfiable core [2023-02-18 01:45:39,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 01:45:49,366 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-18 01:45:49,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 01:46:15,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 01:46:15,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671167001] [2023-02-18 01:46:15,709 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 01:46:15,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298462543] [2023-02-18 01:46:15,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298462543] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 01:46:15,710 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 01:46:15,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2023-02-18 01:46:15,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240712070] [2023-02-18 01:46:15,710 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 01:46:15,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-18 01:46:15,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 01:46:15,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-18 01:46:15,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=444, Unknown=6, NotChecked=0, Total=552 [2023-02-18 01:46:15,712 INFO L87 Difference]: Start difference. First operand 80 states and 91 transitions. Second operand has 17 states, 16 states have (on average 2.125) internal successors, (34), 14 states have internal predecessors, (34), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-18 01:46:22,498 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-02-18 01:46:30,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 01:46:31,543 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 01:46:33,570 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 01:46:35,577 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 01:46:37,292 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 01:46:39,419 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 01:46:41,273 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 01:46:44,277 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 01:46:47,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-02-18 01:46:49,144 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-02-18 01:46:51,239 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-02-18 01:46:53,247 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-02-18 01:46:55,255 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-02-18 01:46:57,101 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-02-18 01:46:57,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 01:46:57,932 INFO L93 Difference]: Finished difference Result 121 states and 138 transitions. [2023-02-18 01:46:57,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-18 01:46:57,932 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 14 states have internal predecessors, (34), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 49 [2023-02-18 01:46:57,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 01:46:57,934 INFO L225 Difference]: With dead ends: 121 [2023-02-18 01:46:57,934 INFO L226 Difference]: Without dead ends: 119 [2023-02-18 01:46:57,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 36.6s TimeCoverageRelationStatistics Valid=128, Invalid=619, Unknown=9, NotChecked=0, Total=756 [2023-02-18 01:46:57,935 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 50 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 11 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.9s IncrementalHoareTripleChecker+Time [2023-02-18 01:46:57,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 395 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 441 Invalid, 9 Unknown, 0 Unchecked, 32.9s Time] [2023-02-18 01:46:57,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-02-18 01:46:57,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 101. [2023-02-18 01:46:57,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 79 states have (on average 1.1772151898734178) internal successors, (93), 82 states have internal predecessors, (93), 12 states have call successors, (12), 9 states have call predecessors, (12), 9 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2023-02-18 01:46:57,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 116 transitions. [2023-02-18 01:46:57,952 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 116 transitions. Word has length 49 [2023-02-18 01:46:57,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 01:46:57,952 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 116 transitions. [2023-02-18 01:46:57,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 14 states have internal predecessors, (34), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-18 01:46:57,953 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 116 transitions. [2023-02-18 01:46:57,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-18 01:46:57,954 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:46:57,954 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:46:57,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-18 01:46:58,161 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,SelfDestructingSolverStorable9 [2023-02-18 01:46:58,161 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:46:58,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:46:58,162 INFO L85 PathProgramCache]: Analyzing trace with hash 395678384, now seen corresponding path program 1 times [2023-02-18 01:46:58,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:46:58,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152254011] [2023-02-18 01:46:58,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:46:58,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:46:58,173 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 01:46:58,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [832632455] [2023-02-18 01:46:58,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:46:58,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:46:58,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:46:58,178 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) [2023-02-18 01:46:58,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-18 01:46:58,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 01:46:58,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-18 01:46:58,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 01:46:58,247 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 31 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 01:46:58,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 01:46:58,343 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-18 01:46:58,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 01:46:58,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152254011] [2023-02-18 01:46:58,344 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 01:46:58,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832632455] [2023-02-18 01:46:58,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832632455] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 01:46:58,344 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 01:46:58,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2023-02-18 01:46:58,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194629154] [2023-02-18 01:46:58,345 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 01:46:58,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-18 01:46:58,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 01:46:58,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-18 01:46:58,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2023-02-18 01:46:58,346 INFO L87 Difference]: Start difference. First operand 101 states and 116 transitions. Second operand has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 7 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2023-02-18 01:46:58,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 01:46:58,573 INFO L93 Difference]: Finished difference Result 389 states and 452 transitions. [2023-02-18 01:46:58,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-18 01:46:58,573 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 7 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 49 [2023-02-18 01:46:58,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 01:46:58,576 INFO L225 Difference]: With dead ends: 389 [2023-02-18 01:46:58,576 INFO L226 Difference]: Without dead ends: 380 [2023-02-18 01:46:58,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=259, Invalid=497, Unknown=0, NotChecked=0, Total=756 [2023-02-18 01:46:58,577 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 225 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 01:46:58,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 278 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 01:46:58,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2023-02-18 01:46:58,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 337. [2023-02-18 01:46:58,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 260 states have (on average 1.2230769230769232) internal successors, (318), 269 states have internal predecessors, (318), 43 states have call successors, (43), 34 states have call predecessors, (43), 33 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2023-02-18 01:46:58,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 395 transitions. [2023-02-18 01:46:58,633 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 395 transitions. Word has length 49 [2023-02-18 01:46:58,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 01:46:58,634 INFO L495 AbstractCegarLoop]: Abstraction has 337 states and 395 transitions. [2023-02-18 01:46:58,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 7 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2023-02-18 01:46:58,634 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 395 transitions. [2023-02-18 01:46:58,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-18 01:46:58,635 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:46:58,636 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:46:58,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-18 01:46:58,841 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,SelfDestructingSolverStorable10 [2023-02-18 01:46:58,841 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:46:58,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:46:58,842 INFO L85 PathProgramCache]: Analyzing trace with hash -2122494090, now seen corresponding path program 1 times [2023-02-18 01:46:58,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:46:58,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315918719] [2023-02-18 01:46:58,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:46:58,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:46:58,852 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 01:46:58,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1837560469] [2023-02-18 01:46:58,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:46:58,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:46:58,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:46:58,854 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) [2023-02-18 01:46:58,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-18 01:47:02,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 01:47:02,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 49 conjunts are in the unsatisfiable core [2023-02-18 01:47:02,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 01:47:23,004 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 01:47:23,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 01:47:32,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 01:47:32,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315918719] [2023-02-18 01:47:32,820 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 01:47:32,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837560469] [2023-02-18 01:47:32,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837560469] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 01:47:32,820 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 01:47:32,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2023-02-18 01:47:32,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536615415] [2023-02-18 01:47:32,820 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 01:47:32,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-18 01:47:32,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 01:47:32,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-18 01:47:32,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=451, Unknown=1, NotChecked=0, Total=552 [2023-02-18 01:47:32,821 INFO L87 Difference]: Start difference. First operand 337 states and 395 transitions. Second operand has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 15 states have internal predecessors, (37), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-18 01:47:45,986 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-02-18 01:47:46,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 01:47:46,476 INFO L93 Difference]: Finished difference Result 401 states and 483 transitions. [2023-02-18 01:47:46,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-18 01:47:46,477 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 15 states have internal predecessors, (37), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 49 [2023-02-18 01:47:46,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 01:47:46,479 INFO L225 Difference]: With dead ends: 401 [2023-02-18 01:47:46,479 INFO L226 Difference]: Without dead ends: 399 [2023-02-18 01:47:46,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 21.4s TimeCoverageRelationStatistics Valid=125, Invalid=630, Unknown=1, NotChecked=0, Total=756 [2023-02-18 01:47:46,480 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 50 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2023-02-18 01:47:46,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 361 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 435 Invalid, 1 Unknown, 0 Unchecked, 5.5s Time] [2023-02-18 01:47:46,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2023-02-18 01:47:46,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 337. [2023-02-18 01:47:46,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 260 states have (on average 1.2230769230769232) internal successors, (318), 269 states have internal predecessors, (318), 43 states have call successors, (43), 34 states have call predecessors, (43), 33 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2023-02-18 01:47:46,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 395 transitions. [2023-02-18 01:47:46,529 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 395 transitions. Word has length 49 [2023-02-18 01:47:46,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 01:47:46,529 INFO L495 AbstractCegarLoop]: Abstraction has 337 states and 395 transitions. [2023-02-18 01:47:46,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 15 states have internal predecessors, (37), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-18 01:47:46,529 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 395 transitions. [2023-02-18 01:47:46,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-18 01:47:46,530 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:47:46,531 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:47:46,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-18 01:47:46,737 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,SelfDestructingSolverStorable11 [2023-02-18 01:47:46,737 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:47:46,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:47:46,737 INFO L85 PathProgramCache]: Analyzing trace with hash 2114127183, now seen corresponding path program 1 times [2023-02-18 01:47:46,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:47:46,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229832802] [2023-02-18 01:47:46,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:47:46,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:47:46,745 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 01:47:46,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1559354501] [2023-02-18 01:47:46,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:47:46,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:47:46,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:47:46,747 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) [2023-02-18 01:47:46,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-18 01:47:46,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 01:47:46,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-18 01:47:46,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 01:47:46,806 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-18 01:47:46,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 01:47:46,839 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-18 01:47:46,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 01:47:46,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229832802] [2023-02-18 01:47:46,840 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 01:47:46,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559354501] [2023-02-18 01:47:46,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559354501] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 01:47:46,840 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 01:47:46,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2023-02-18 01:47:46,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812098665] [2023-02-18 01:47:46,841 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 01:47:46,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-18 01:47:46,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 01:47:46,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-18 01:47:46,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-02-18 01:47:46,842 INFO L87 Difference]: Start difference. First operand 337 states and 395 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-18 01:47:47,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 01:47:47,109 INFO L93 Difference]: Finished difference Result 372 states and 429 transitions. [2023-02-18 01:47:47,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-18 01:47:47,109 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 52 [2023-02-18 01:47:47,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 01:47:47,111 INFO L225 Difference]: With dead ends: 372 [2023-02-18 01:47:47,111 INFO L226 Difference]: Without dead ends: 327 [2023-02-18 01:47:47,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-02-18 01:47:47,113 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 12 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 01:47:47,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 146 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 01:47:47,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2023-02-18 01:47:47,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 304. [2023-02-18 01:47:47,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 239 states have (on average 1.205020920502092) internal successors, (288), 248 states have internal predecessors, (288), 33 states have call successors, (33), 31 states have call predecessors, (33), 31 states have return successors, (32), 24 states have call predecessors, (32), 32 states have call successors, (32) [2023-02-18 01:47:47,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 353 transitions. [2023-02-18 01:47:47,144 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 353 transitions. Word has length 52 [2023-02-18 01:47:47,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 01:47:47,144 INFO L495 AbstractCegarLoop]: Abstraction has 304 states and 353 transitions. [2023-02-18 01:47:47,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-18 01:47:47,144 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 353 transitions. [2023-02-18 01:47:47,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-18 01:47:47,145 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:47:47,145 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:47:47,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-18 01:47:47,346 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,SelfDestructingSolverStorable12 [2023-02-18 01:47:47,346 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:47:47,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:47:47,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1797561273, now seen corresponding path program 1 times [2023-02-18 01:47:47,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:47:47,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888219959] [2023-02-18 01:47:47,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:47:47,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:47:47,356 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 01:47:47,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2123145139] [2023-02-18 01:47:47,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:47:47,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:47:47,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:47:47,358 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) [2023-02-18 01:47:47,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-18 01:47:47,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 01:47:47,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-18 01:47:47,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 01:47:47,415 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-02-18 01:47:47,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 01:47:47,455 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-02-18 01:47:47,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 01:47:47,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888219959] [2023-02-18 01:47:47,456 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 01:47:47,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123145139] [2023-02-18 01:47:47,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123145139] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 01:47:47,456 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 01:47:47,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-02-18 01:47:47,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674428903] [2023-02-18 01:47:47,456 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 01:47:47,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-18 01:47:47,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 01:47:47,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-18 01:47:47,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-02-18 01:47:47,458 INFO L87 Difference]: Start difference. First operand 304 states and 353 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-18 01:47:47,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 01:47:47,591 INFO L93 Difference]: Finished difference Result 508 states and 577 transitions. [2023-02-18 01:47:47,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-18 01:47:47,592 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 51 [2023-02-18 01:47:47,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 01:47:47,593 INFO L225 Difference]: With dead ends: 508 [2023-02-18 01:47:47,593 INFO L226 Difference]: Without dead ends: 310 [2023-02-18 01:47:47,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2023-02-18 01:47:47,595 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 95 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 01:47:47,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 173 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 01:47:47,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2023-02-18 01:47:47,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 304. [2023-02-18 01:47:47,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 239 states have (on average 1.1799163179916319) internal successors, (282), 248 states have internal predecessors, (282), 33 states have call successors, (33), 31 states have call predecessors, (33), 31 states have return successors, (32), 24 states have call predecessors, (32), 32 states have call successors, (32) [2023-02-18 01:47:47,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 347 transitions. [2023-02-18 01:47:47,629 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 347 transitions. Word has length 51 [2023-02-18 01:47:47,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 01:47:47,629 INFO L495 AbstractCegarLoop]: Abstraction has 304 states and 347 transitions. [2023-02-18 01:47:47,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-18 01:47:47,630 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 347 transitions. [2023-02-18 01:47:47,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-18 01:47:47,631 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:47:47,631 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:47:47,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-18 01:47:47,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:47:47,837 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:47:47,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:47:47,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1519157991, now seen corresponding path program 5 times [2023-02-18 01:47:47,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:47:47,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166856643] [2023-02-18 01:47:47,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:47:47,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:47:47,846 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 01:47:47,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [48732355] [2023-02-18 01:47:47,847 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 01:47:47,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:47:47,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:47:47,848 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) [2023-02-18 01:47:47,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-18 01:54:23,433 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-02-18 01:54:23,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 01:54:23,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 56 conjunts are in the unsatisfiable core [2023-02-18 01:54:23,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 01:54:35,470 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 3 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 01:54:35,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 01:55:02,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 01:55:02,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166856643] [2023-02-18 01:55:02,516 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 01:55:02,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48732355] [2023-02-18 01:55:02,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48732355] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 01:55:02,516 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 01:55:02,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2023-02-18 01:55:02,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662906700] [2023-02-18 01:55:02,516 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 01:55:02,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-18 01:55:02,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 01:55:02,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-18 01:55:02,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=567, Unknown=12, NotChecked=0, Total=702 [2023-02-18 01:55:02,518 INFO L87 Difference]: Start difference. First operand 304 states and 347 transitions. Second operand has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 17 states have internal predecessors, (40), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-18 01:55:24,028 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 01:55:26,189 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 [0] [2023-02-18 01:55:28,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 01:55:28,133 INFO L93 Difference]: Finished difference Result 344 states and 390 transitions. [2023-02-18 01:55:28,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-18 01:55:28,133 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 17 states have internal predecessors, (40), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 52 [2023-02-18 01:55:28,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 01:55:28,135 INFO L225 Difference]: With dead ends: 344 [2023-02-18 01:55:28,135 INFO L226 Difference]: Without dead ends: 342 [2023-02-18 01:55:28,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 52.6s TimeCoverageRelationStatistics Valid=158, Invalid=817, Unknown=17, NotChecked=0, Total=992 [2023-02-18 01:55:28,138 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 46 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 17 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2023-02-18 01:55:28,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 453 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 574 Invalid, 1 Unknown, 0 Unchecked, 9.8s Time] [2023-02-18 01:55:28,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2023-02-18 01:55:28,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 322. [2023-02-18 01:55:28,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 253 states have (on average 1.1778656126482214) internal successors, (298), 262 states have internal predecessors, (298), 35 states have call successors, (35), 33 states have call predecessors, (35), 33 states have return successors, (34), 26 states have call predecessors, (34), 34 states have call successors, (34) [2023-02-18 01:55:28,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 367 transitions. [2023-02-18 01:55:28,185 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 367 transitions. Word has length 52 [2023-02-18 01:55:28,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 01:55:28,186 INFO L495 AbstractCegarLoop]: Abstraction has 322 states and 367 transitions. [2023-02-18 01:55:28,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 17 states have internal predecessors, (40), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-18 01:55:28,186 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 367 transitions. [2023-02-18 01:55:28,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-18 01:55:28,186 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:55:28,186 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:55:28,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-18 01:55:28,387 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,SelfDestructingSolverStorable14 [2023-02-18 01:55:28,387 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:55:28,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:55:28,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1000801943, now seen corresponding path program 2 times [2023-02-18 01:55:28,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:55:28,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930011852] [2023-02-18 01:55:28,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:55:28,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:55:28,397 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 01:55:28,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [10124005] [2023-02-18 01:55:28,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 01:55:28,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:55:28,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:55:28,410 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) [2023-02-18 01:55:28,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-18 01:55:29,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 01:55:29,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 01:55:29,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 37 conjunts are in the unsatisfiable core [2023-02-18 01:55:29,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 01:55:50,315 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 33 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 01:55:50,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 01:56:03,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 01:56:03,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930011852] [2023-02-18 01:56:03,064 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 01:56:03,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10124005] [2023-02-18 01:56:03,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10124005] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 01:56:03,064 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 01:56:03,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-02-18 01:56:03,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723255195] [2023-02-18 01:56:03,064 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 01:56:03,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-18 01:56:03,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 01:56:03,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-18 01:56:03,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=319, Unknown=3, NotChecked=0, Total=420 [2023-02-18 01:56:03,065 INFO L87 Difference]: Start difference. First operand 322 states and 367 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-18 01:56:10,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 01:56:10,174 INFO L93 Difference]: Finished difference Result 589 states and 701 transitions. [2023-02-18 01:56:10,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-18 01:56:10,178 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 52 [2023-02-18 01:56:10,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 01:56:10,180 INFO L225 Difference]: With dead ends: 589 [2023-02-18 01:56:10,181 INFO L226 Difference]: Without dead ends: 586 [2023-02-18 01:56:10,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=111, Invalid=392, Unknown=3, NotChecked=0, Total=506 [2023-02-18 01:56:10,181 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 39 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2023-02-18 01:56:10,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 340 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2023-02-18 01:56:10,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2023-02-18 01:56:10,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 420. [2023-02-18 01:56:10,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 330 states have (on average 1.1787878787878787) internal successors, (389), 339 states have internal predecessors, (389), 49 states have call successors, (49), 40 states have call predecessors, (49), 40 states have return successors, (48), 40 states have call predecessors, (48), 48 states have call successors, (48) [2023-02-18 01:56:10,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 486 transitions. [2023-02-18 01:56:10,297 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 486 transitions. Word has length 52 [2023-02-18 01:56:10,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 01:56:10,297 INFO L495 AbstractCegarLoop]: Abstraction has 420 states and 486 transitions. [2023-02-18 01:56:10,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-18 01:56:10,297 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 486 transitions. [2023-02-18 01:56:10,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-18 01:56:10,298 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:56:10,298 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:56:10,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-18 01:56:10,505 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,SelfDestructingSolverStorable15 [2023-02-18 01:56:10,506 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:56:10,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:56:10,506 INFO L85 PathProgramCache]: Analyzing trace with hash 272650529, now seen corresponding path program 6 times [2023-02-18 01:56:10,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:56:10,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853514844] [2023-02-18 01:56:10,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:56:10,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:56:10,519 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 01:56:10,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1957128011] [2023-02-18 01:56:10,522 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 01:56:10,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:56:10,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:56:10,523 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) [2023-02-18 01:56:10,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-18 01:56:18,708 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-02-18 01:56:18,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 01:56:18,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-18 01:56:18,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 01:56:21,059 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-18 01:56:21,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 01:56:35,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 01:56:35,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853514844] [2023-02-18 01:56:35,979 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 01:56:35,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957128011] [2023-02-18 01:56:35,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957128011] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 01:56:35,980 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 01:56:35,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2023-02-18 01:56:35,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805344709] [2023-02-18 01:56:35,980 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 01:56:35,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-18 01:56:35,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 01:56:35,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-18 01:56:35,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=202, Unknown=5, NotChecked=0, Total=272 [2023-02-18 01:56:35,981 INFO L87 Difference]: Start difference. First operand 420 states and 486 transitions. Second operand has 13 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-18 01:56:37,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 01:56:37,337 INFO L93 Difference]: Finished difference Result 626 states and 715 transitions. [2023-02-18 01:56:37,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-18 01:56:37,338 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 55 [2023-02-18 01:56:37,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 01:56:37,340 INFO L225 Difference]: With dead ends: 626 [2023-02-18 01:56:37,340 INFO L226 Difference]: Without dead ends: 377 [2023-02-18 01:56:37,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=69, Invalid=232, Unknown=5, NotChecked=0, Total=306 [2023-02-18 01:56:37,342 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 15 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-02-18 01:56:37,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 170 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-02-18 01:56:37,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2023-02-18 01:56:37,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 377. [2023-02-18 01:56:37,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 297 states have (on average 1.1784511784511784) internal successors, (350), 305 states have internal predecessors, (350), 44 states have call successors, (44), 35 states have call predecessors, (44), 35 states have return successors, (43), 36 states have call predecessors, (43), 43 states have call successors, (43) [2023-02-18 01:56:37,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 437 transitions. [2023-02-18 01:56:37,450 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 437 transitions. Word has length 55 [2023-02-18 01:56:37,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 01:56:37,451 INFO L495 AbstractCegarLoop]: Abstraction has 377 states and 437 transitions. [2023-02-18 01:56:37,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-18 01:56:37,451 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 437 transitions. [2023-02-18 01:56:37,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-18 01:56:37,452 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:56:37,452 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:56:37,463 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-02-18 01:56:37,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-02-18 01:56:37,661 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:56:37,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:56:37,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1290620908, now seen corresponding path program 7 times [2023-02-18 01:56:37,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:56:37,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103251583] [2023-02-18 01:56:37,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:56:37,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:56:37,672 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 01:56:37,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [630524787] [2023-02-18 01:56:37,673 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 01:56:37,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:56:37,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:56:37,674 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 01:56:37,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-18 01:56:46,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 01:56:46,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-18 01:56:46,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 01:56:56,836 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 7 proven. 53 refuted. 3 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 01:56:56,837 INFO L328 TraceCheckSpWp]: Computing backward predicates...