./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench/egcd2-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3dbbec33 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench/egcd2-ll.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ed6536c9cb0e4b2be9a327fc4a25c6bfba6e98b1dfb78e314dd25bca8cbdb087 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3dbbec3 [2023-02-14 11:45:29,616 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-14 11:45:29,617 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-14 11:45:29,647 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-14 11:45:29,648 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-14 11:45:29,650 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-14 11:45:29,652 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-14 11:45:29,654 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-14 11:45:29,655 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-14 11:45:29,659 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-14 11:45:29,659 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-14 11:45:29,661 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-14 11:45:29,661 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-14 11:45:29,663 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-14 11:45:29,664 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-14 11:45:29,665 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-14 11:45:29,666 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-14 11:45:29,667 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-14 11:45:29,668 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-14 11:45:29,673 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-14 11:45:29,673 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-14 11:45:29,674 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-14 11:45:29,675 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-14 11:45:29,675 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-14 11:45:29,681 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-14 11:45:29,681 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-14 11:45:29,681 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-14 11:45:29,682 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-14 11:45:29,683 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-14 11:45:29,683 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-14 11:45:29,683 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-14 11:45:29,684 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-14 11:45:29,685 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-14 11:45:29,686 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-14 11:45:29,686 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-14 11:45:29,687 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-14 11:45:29,687 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-14 11:45:29,687 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-14 11:45:29,687 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-14 11:45:29,688 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-14 11:45:29,689 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-14 11:45:29,689 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-14 11:45:29,711 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-14 11:45:29,711 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-14 11:45:29,711 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-14 11:45:29,712 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-14 11:45:29,717 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-14 11:45:29,717 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-14 11:45:29,717 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-14 11:45:29,718 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-14 11:45:29,718 INFO L138 SettingsManager]: * Use SBE=true [2023-02-14 11:45:29,718 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-14 11:45:29,719 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-14 11:45:29,719 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-14 11:45:29,719 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-14 11:45:29,719 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-14 11:45:29,719 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-14 11:45:29,719 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-14 11:45:29,720 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-14 11:45:29,720 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-14 11:45:29,720 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-14 11:45:29,720 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-14 11:45:29,720 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-14 11:45:29,720 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-14 11:45:29,720 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-14 11:45:29,721 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-14 11:45:29,721 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 11:45:29,721 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-14 11:45:29,721 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-14 11:45:29,721 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-14 11:45:29,722 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-14 11:45:29,722 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-14 11:45:29,722 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-14 11:45:29,722 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-14 11:45:29,722 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-14 11:45:29,722 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-14 11:45:29,723 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-14 11:45:29,723 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ed6536c9cb0e4b2be9a327fc4a25c6bfba6e98b1dfb78e314dd25bca8cbdb087 [2023-02-14 11:45:29,885 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-14 11:45:29,910 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-14 11:45:29,912 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-14 11:45:29,912 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-14 11:45:29,913 INFO L275 PluginConnector]: CDTParser initialized [2023-02-14 11:45:29,913 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/egcd2-ll.c [2023-02-14 11:45:30,909 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-14 11:45:31,025 INFO L351 CDTParser]: Found 1 translation units. [2023-02-14 11:45:31,026 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/egcd2-ll.c [2023-02-14 11:45:31,030 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/934d854e3/33398c354e1a4ceabf072c29739de5bb/FLAG04d55ee20 [2023-02-14 11:45:31,040 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/934d854e3/33398c354e1a4ceabf072c29739de5bb [2023-02-14 11:45:31,042 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-14 11:45:31,043 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-14 11:45:31,044 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-14 11:45:31,044 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-14 11:45:31,046 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-14 11:45:31,047 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 11:45:31" (1/1) ... [2023-02-14 11:45:31,048 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14f48cb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:45:31, skipping insertion in model container [2023-02-14 11:45:31,048 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 11:45:31" (1/1) ... [2023-02-14 11:45:31,053 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-14 11:45:31,064 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-14 11:45:31,180 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/egcd2-ll.c[490,503] [2023-02-14 11:45:31,203 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 11:45:31,211 INFO L203 MainTranslator]: Completed pre-run [2023-02-14 11:45:31,222 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/egcd2-ll.c[490,503] [2023-02-14 11:45:31,238 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 11:45:31,260 INFO L208 MainTranslator]: Completed translation [2023-02-14 11:45:31,261 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:45:31 WrapperNode [2023-02-14 11:45:31,261 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-14 11:45:31,262 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-14 11:45:31,262 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-14 11:45:31,262 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-14 11:45:31,266 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:45:31" (1/1) ... [2023-02-14 11:45:31,277 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:45:31" (1/1) ... [2023-02-14 11:45:31,294 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 75 [2023-02-14 11:45:31,294 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-14 11:45:31,295 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-14 11:45:31,295 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-14 11:45:31,295 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-14 11:45:31,301 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:45:31" (1/1) ... [2023-02-14 11:45:31,302 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:45:31" (1/1) ... [2023-02-14 11:45:31,304 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:45:31" (1/1) ... [2023-02-14 11:45:31,304 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:45:31" (1/1) ... [2023-02-14 11:45:31,313 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:45:31" (1/1) ... [2023-02-14 11:45:31,316 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:45:31" (1/1) ... [2023-02-14 11:45:31,319 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:45:31" (1/1) ... [2023-02-14 11:45:31,320 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:45:31" (1/1) ... [2023-02-14 11:45:31,324 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-14 11:45:31,325 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-14 11:45:31,325 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-14 11:45:31,325 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-14 11:45:31,327 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:45:31" (1/1) ... [2023-02-14 11:45:31,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 11:45:31,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:45:31,348 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-14 11:45:31,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-14 11:45:31,377 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-14 11:45:31,378 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-14 11:45:31,378 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-14 11:45:31,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-14 11:45:31,378 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-14 11:45:31,379 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-14 11:45:31,379 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-14 11:45:31,379 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-14 11:45:31,423 INFO L235 CfgBuilder]: Building ICFG [2023-02-14 11:45:31,425 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-14 11:45:31,571 INFO L276 CfgBuilder]: Performing block encoding [2023-02-14 11:45:31,575 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-14 11:45:31,575 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-14 11:45:31,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 11:45:31 BoogieIcfgContainer [2023-02-14 11:45:31,577 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-14 11:45:31,578 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-14 11:45:31,578 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-14 11:45:31,581 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-14 11:45:31,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 11:45:31" (1/3) ... [2023-02-14 11:45:31,581 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32892895 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 11:45:31, skipping insertion in model container [2023-02-14 11:45:31,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:45:31" (2/3) ... [2023-02-14 11:45:31,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32892895 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 11:45:31, skipping insertion in model container [2023-02-14 11:45:31,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 11:45:31" (3/3) ... [2023-02-14 11:45:31,583 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll.c [2023-02-14 11:45:31,594 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-14 11:45:31,594 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-14 11:45:31,624 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-14 11:45:31,628 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;@6e2d292a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-14 11:45:31,628 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-14 11:45:31,631 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 18 states have (on average 1.5) internal successors, (27), 20 states have internal predecessors, (27), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-14 11:45:31,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-14 11:45:31,636 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:45:31,636 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:45:31,637 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:45:31,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:45:31,640 INFO L85 PathProgramCache]: Analyzing trace with hash 223354930, now seen corresponding path program 1 times [2023-02-14 11:45:31,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:45:31,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291780207] [2023-02-14 11:45:31,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:45:31,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:45:31,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:45:31,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:45:31,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291780207] [2023-02-14 11:45:31,721 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-14 11:45:31,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154122493] [2023-02-14 11:45:31,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:45:31,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:45:31,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:45:31,724 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:45:31,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-14 11:45:31,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:45:31,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-14 11:45:31,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:45:31,845 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-14 11:45:31,845 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 11:45:31,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154122493] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 11:45:31,846 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 11:45:31,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-14 11:45:31,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026107493] [2023-02-14 11:45:31,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 11:45:31,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-14 11:45:31,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:45:31,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-14 11:45:31,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-14 11:45:31,880 INFO L87 Difference]: Start difference. First operand has 32 states, 18 states have (on average 1.5) internal successors, (27), 20 states have internal predecessors, (27), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-14 11:45:31,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:45:31,905 INFO L93 Difference]: Finished difference Result 61 states and 100 transitions. [2023-02-14 11:45:31,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-14 11:45:31,907 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2023-02-14 11:45:31,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:45:31,912 INFO L225 Difference]: With dead ends: 61 [2023-02-14 11:45:31,912 INFO L226 Difference]: Without dead ends: 28 [2023-02-14 11:45:31,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-14 11:45:31,921 INFO L413 NwaCegarLoop]: 41 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, 41 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 11:45:31,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 11:45:31,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-02-14 11:45:31,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-02-14 11:45:31,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 15 states have (on average 1.2) internal successors, (18), 17 states have internal predecessors, (18), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-14 11:45:31,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2023-02-14 11:45:31,952 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 28 [2023-02-14 11:45:31,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:45:31,952 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2023-02-14 11:45:31,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-14 11:45:31,953 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2023-02-14 11:45:31,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-14 11:45:31,955 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:45:31,955 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:45:31,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-14 11:45:32,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-02-14 11:45:32,162 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:45:32,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:45:32,163 INFO L85 PathProgramCache]: Analyzing trace with hash 727709964, now seen corresponding path program 1 times [2023-02-14 11:45:32,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:45:32,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428807365] [2023-02-14 11:45:32,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:45:32,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:45:32,191 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 11:45:32,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [858601752] [2023-02-14 11:45:32,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:45:32,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:45:32,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:45:32,206 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:45:32,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-14 11:45:32,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:45:32,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-14 11:45:32,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:45:32,443 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-14 11:45:32,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:45:32,525 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-14 11:45:32,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:45:32,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428807365] [2023-02-14 11:45:32,528 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 11:45:32,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858601752] [2023-02-14 11:45:32,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858601752] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:45:32,531 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 11:45:32,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2023-02-14 11:45:32,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580189062] [2023-02-14 11:45:32,532 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 11:45:32,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-14 11:45:32,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:45:32,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-14 11:45:32,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-02-14 11:45:32,535 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-14 11:45:32,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:45:32,608 INFO L93 Difference]: Finished difference Result 45 states and 60 transitions. [2023-02-14 11:45:32,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 11:45:32,609 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2023-02-14 11:45:32,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:45:32,610 INFO L225 Difference]: With dead ends: 45 [2023-02-14 11:45:32,610 INFO L226 Difference]: Without dead ends: 37 [2023-02-14 11:45:32,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-02-14 11:45:32,611 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 20 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 11:45:32,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 99 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 11:45:32,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-02-14 11:45:32,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2023-02-14 11:45:32,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-14 11:45:32,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2023-02-14 11:45:32,618 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 29 [2023-02-14 11:45:32,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:45:32,618 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2023-02-14 11:45:32,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-14 11:45:32,619 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2023-02-14 11:45:32,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-14 11:45:32,619 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:45:32,619 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:45:32,626 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-14 11:45:32,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-02-14 11:45:32,828 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:45:32,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:45:32,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1088429638, now seen corresponding path program 1 times [2023-02-14 11:45:32,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:45:32,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844687499] [2023-02-14 11:45:32,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:45:32,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:45:32,838 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 11:45:32,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [13195330] [2023-02-14 11:45:32,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:45:32,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:45:32,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:45:32,852 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:45:32,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-14 11:45:32,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:45:32,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-14 11:45:32,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:45:32,955 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-14 11:45:32,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:45:33,004 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-14 11:45:33,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:45:33,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844687499] [2023-02-14 11:45:33,005 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 11:45:33,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13195330] [2023-02-14 11:45:33,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13195330] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-14 11:45:33,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-14 11:45:33,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2023-02-14 11:45:33,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029859840] [2023-02-14 11:45:33,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 11:45:33,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 11:45:33,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:45:33,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 11:45:33,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-02-14 11:45:33,007 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-14 11:45:33,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:45:33,042 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2023-02-14 11:45:33,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 11:45:33,042 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 30 [2023-02-14 11:45:33,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:45:33,043 INFO L225 Difference]: With dead ends: 36 [2023-02-14 11:45:33,043 INFO L226 Difference]: Without dead ends: 34 [2023-02-14 11:45:33,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-02-14 11:45:33,044 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 7 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 11:45:33,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 100 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 11:45:33,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-02-14 11:45:33,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2023-02-14 11:45:33,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-14 11:45:33,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2023-02-14 11:45:33,051 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 30 [2023-02-14 11:45:33,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:45:33,051 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2023-02-14 11:45:33,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-14 11:45:33,052 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2023-02-14 11:45:33,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-14 11:45:33,052 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:45:33,052 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:45:33,073 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-14 11:45:33,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:45:33,261 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:45:33,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:45:33,262 INFO L85 PathProgramCache]: Analyzing trace with hash 161014808, now seen corresponding path program 1 times [2023-02-14 11:45:33,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:45:33,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439100032] [2023-02-14 11:45:33,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:45:33,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:45:33,270 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 11:45:33,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [42542289] [2023-02-14 11:45:33,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:45:33,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:45:33,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:45:33,285 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:45:33,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-14 11:45:33,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:45:33,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-14 11:45:33,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:45:33,582 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-14 11:45:33,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:45:33,664 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-14 11:45:33,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:45:33,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439100032] [2023-02-14 11:45:33,664 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 11:45:33,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42542289] [2023-02-14 11:45:33,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42542289] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-14 11:45:33,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-14 11:45:33,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 13 [2023-02-14 11:45:33,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290919534] [2023-02-14 11:45:33,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 11:45:33,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 11:45:33,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:45:33,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 11:45:33,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-02-14 11:45:33,667 INFO L87 Difference]: Start difference. First operand 34 states and 42 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-14 11:45:33,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:45:33,713 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2023-02-14 11:45:33,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 11:45:33,717 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 35 [2023-02-14 11:45:33,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:45:33,718 INFO L225 Difference]: With dead ends: 47 [2023-02-14 11:45:33,718 INFO L226 Difference]: Without dead ends: 45 [2023-02-14 11:45:33,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-02-14 11:45:33,719 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 6 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 11:45:33,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 124 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 11:45:33,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-02-14 11:45:33,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2023-02-14 11:45:33,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 25 states have (on average 1.16) internal successors, (29), 26 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-14 11:45:33,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2023-02-14 11:45:33,727 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 35 [2023-02-14 11:45:33,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:45:33,728 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2023-02-14 11:45:33,728 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-14 11:45:33,728 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2023-02-14 11:45:33,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-14 11:45:33,729 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:45:33,729 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:45:33,738 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-14 11:45:33,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:45:33,935 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:45:33,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:45:33,935 INFO L85 PathProgramCache]: Analyzing trace with hash -2062939834, now seen corresponding path program 1 times [2023-02-14 11:45:33,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:45:33,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372028573] [2023-02-14 11:45:33,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:45:33,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:45:33,959 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 11:45:33,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1119724444] [2023-02-14 11:45:33,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:45:33,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:45:33,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:45:33,961 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:45:33,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-14 11:45:34,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:45:34,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-14 11:45:34,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:45:34,224 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-14 11:45:34,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:45:34,305 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-14 11:45:34,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:45:34,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372028573] [2023-02-14 11:45:34,306 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 11:45:34,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119724444] [2023-02-14 11:45:34,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119724444] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-14 11:45:34,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-14 11:45:34,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 14 [2023-02-14 11:45:34,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988831883] [2023-02-14 11:45:34,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 11:45:34,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 11:45:34,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:45:34,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 11:45:34,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2023-02-14 11:45:34,311 INFO L87 Difference]: Start difference. First operand 44 states and 56 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-14 11:45:34,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:45:34,356 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2023-02-14 11:45:34,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 11:45:34,356 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 40 [2023-02-14 11:45:34,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:45:34,360 INFO L225 Difference]: With dead ends: 51 [2023-02-14 11:45:34,360 INFO L226 Difference]: Without dead ends: 49 [2023-02-14 11:45:34,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2023-02-14 11:45:34,363 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 6 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 11:45:34,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 115 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 11:45:34,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-02-14 11:45:34,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2023-02-14 11:45:34,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 29 states have internal predecessors, (32), 14 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-14 11:45:34,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 59 transitions. [2023-02-14 11:45:34,384 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 59 transitions. Word has length 40 [2023-02-14 11:45:34,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:45:34,386 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 59 transitions. [2023-02-14 11:45:34,386 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-14 11:45:34,386 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 59 transitions. [2023-02-14 11:45:34,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-14 11:45:34,388 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:45:34,388 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:45:34,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-14 11:45:34,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:45:34,593 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:45:34,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:45:34,597 INFO L85 PathProgramCache]: Analyzing trace with hash -98301800, now seen corresponding path program 1 times [2023-02-14 11:45:34,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:45:34,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084044119] [2023-02-14 11:45:34,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:45:34,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:45:34,606 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 11:45:34,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1125461537] [2023-02-14 11:45:34,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:45:34,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:45:34,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:45:34,613 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:45:34,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-14 11:45:34,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:45:34,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-14 11:45:34,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:45:34,734 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-14 11:45:34,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:45:34,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:45:34,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084044119] [2023-02-14 11:45:34,812 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 11:45:34,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125461537] [2023-02-14 11:45:34,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125461537] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:45:34,813 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-14 11:45:34,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2023-02-14 11:45:34,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572761303] [2023-02-14 11:45:34,813 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-14 11:45:34,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-14 11:45:34,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:45:34,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-14 11:45:34,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-02-14 11:45:34,814 INFO L87 Difference]: Start difference. First operand 48 states and 59 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-02-14 11:45:34,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:45:34,900 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2023-02-14 11:45:34,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-14 11:45:34,901 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 45 [2023-02-14 11:45:34,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:45:34,902 INFO L225 Difference]: With dead ends: 55 [2023-02-14 11:45:34,902 INFO L226 Difference]: Without dead ends: 53 [2023-02-14 11:45:34,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-02-14 11:45:34,903 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 12 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 11:45:34,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 95 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 11:45:34,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-02-14 11:45:34,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2023-02-14 11:45:34,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 32 states have internal predecessors, (35), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-14 11:45:34,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2023-02-14 11:45:34,917 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 45 [2023-02-14 11:45:34,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:45:34,917 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2023-02-14 11:45:34,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-02-14 11:45:34,917 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2023-02-14 11:45:34,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-14 11:45:34,918 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:45:34,918 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:45:34,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-14 11:45:35,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:45:35,130 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:45:35,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:45:35,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1721617041, now seen corresponding path program 1 times [2023-02-14 11:45:35,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:45:35,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564715635] [2023-02-14 11:45:35,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:45:35,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:45:35,139 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 11:45:35,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [996811022] [2023-02-14 11:45:35,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:45:35,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:45:35,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:45:35,141 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:45:35,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-14 11:45:35,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:45:35,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-14 11:45:35,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:45:35,222 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-02-14 11:45:35,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:45:35,284 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-02-14 11:45:35,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:45:35,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564715635] [2023-02-14 11:45:35,285 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 11:45:35,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996811022] [2023-02-14 11:45:35,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996811022] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:45:35,285 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 11:45:35,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2023-02-14 11:45:35,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737006797] [2023-02-14 11:45:35,286 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 11:45:35,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-14 11:45:35,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:45:35,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-14 11:45:35,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-02-14 11:45:35,287 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2023-02-14 11:45:35,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:45:35,408 INFO L93 Difference]: Finished difference Result 99 states and 137 transitions. [2023-02-14 11:45:35,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-14 11:45:35,408 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 54 [2023-02-14 11:45:35,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:45:35,409 INFO L225 Difference]: With dead ends: 99 [2023-02-14 11:45:35,409 INFO L226 Difference]: Without dead ends: 91 [2023-02-14 11:45:35,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 95 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-02-14 11:45:35,410 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 36 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 11:45:35,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 180 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 11:45:35,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-02-14 11:45:35,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 82. [2023-02-14 11:45:35,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 45 states have (on average 1.2) internal successors, (54), 46 states have internal predecessors, (54), 30 states have call successors, (30), 6 states have call predecessors, (30), 6 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2023-02-14 11:45:35,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 113 transitions. [2023-02-14 11:45:35,425 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 113 transitions. Word has length 54 [2023-02-14 11:45:35,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:45:35,425 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 113 transitions. [2023-02-14 11:45:35,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2023-02-14 11:45:35,425 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 113 transitions. [2023-02-14 11:45:35,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-02-14 11:45:35,426 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:45:35,426 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:45:35,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-14 11:45:35,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:45:35,631 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:45:35,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:45:35,632 INFO L85 PathProgramCache]: Analyzing trace with hash -653850053, now seen corresponding path program 1 times [2023-02-14 11:45:35,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:45:35,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085667573] [2023-02-14 11:45:35,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:45:35,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:45:35,639 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 11:45:35,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1219468085] [2023-02-14 11:45:35,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:45:35,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:45:35,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:45:35,640 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:45:35,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-14 11:45:35,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:45:35,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-14 11:45:35,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:45:35,808 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 23 proven. 10 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-02-14 11:45:35,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:45:35,911 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-02-14 11:45:35,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:45:35,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085667573] [2023-02-14 11:45:35,911 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 11:45:35,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219468085] [2023-02-14 11:45:35,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219468085] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:45:35,912 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 11:45:35,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2023-02-14 11:45:35,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557580138] [2023-02-14 11:45:35,912 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 11:45:35,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-14 11:45:35,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:45:35,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-14 11:45:35,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2023-02-14 11:45:35,913 INFO L87 Difference]: Start difference. First operand 82 states and 113 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 6 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2023-02-14 11:45:36,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:45:36,194 INFO L93 Difference]: Finished difference Result 125 states and 178 transitions. [2023-02-14 11:45:36,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-14 11:45:36,195 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 6 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 60 [2023-02-14 11:45:36,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:45:36,197 INFO L225 Difference]: With dead ends: 125 [2023-02-14 11:45:36,197 INFO L226 Difference]: Without dead ends: 121 [2023-02-14 11:45:36,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2023-02-14 11:45:36,198 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 32 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 11:45:36,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 199 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 11:45:36,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-02-14 11:45:36,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 89. [2023-02-14 11:45:36,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 49 states have (on average 1.183673469387755) internal successors, (58), 51 states have internal predecessors, (58), 32 states have call successors, (32), 7 states have call predecessors, (32), 7 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2023-02-14 11:45:36,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 121 transitions. [2023-02-14 11:45:36,217 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 121 transitions. Word has length 60 [2023-02-14 11:45:36,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:45:36,218 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 121 transitions. [2023-02-14 11:45:36,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 6 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2023-02-14 11:45:36,218 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 121 transitions. [2023-02-14 11:45:36,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-02-14 11:45:36,219 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:45:36,219 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:45:36,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-14 11:45:36,441 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 [2023-02-14 11:45:36,441 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:45:36,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:45:36,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1044201731, now seen corresponding path program 2 times [2023-02-14 11:45:36,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:45:36,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134776801] [2023-02-14 11:45:36,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:45:36,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:45:36,451 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 11:45:36,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [578328552] [2023-02-14 11:45:36,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 11:45:36,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:45:36,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:45:36,453 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) [2023-02-14 11:45:36,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-14 11:45:36,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 11:45:36,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:45:36,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 43 conjunts are in the unsatisfiable core [2023-02-14 11:45:36,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:45:37,836 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 19 proven. 32 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-02-14 11:45:37,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:45:41,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:45:41,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134776801] [2023-02-14 11:45:41,991 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 11:45:41,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578328552] [2023-02-14 11:45:41,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578328552] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:45:41,991 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-14 11:45:41,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-02-14 11:45:41,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472247085] [2023-02-14 11:45:41,991 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-14 11:45:41,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-14 11:45:41,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:45:41,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-14 11:45:41,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=317, Unknown=1, NotChecked=0, Total=380 [2023-02-14 11:45:41,992 INFO L87 Difference]: Start difference. First operand 89 states and 121 transitions. Second operand has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-02-14 11:45:43,860 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-14 11:45:45,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:45:45,407 INFO L93 Difference]: Finished difference Result 121 states and 160 transitions. [2023-02-14 11:45:45,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-14 11:45:45,408 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) Word has length 65 [2023-02-14 11:45:45,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:45:45,410 INFO L225 Difference]: With dead ends: 121 [2023-02-14 11:45:45,410 INFO L226 Difference]: Without dead ends: 119 [2023-02-14 11:45:45,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=101, Invalid=498, Unknown=1, NotChecked=0, Total=600 [2023-02-14 11:45:45,412 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 38 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 17 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-02-14 11:45:45,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 112 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 390 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2023-02-14 11:45:45,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-02-14 11:45:45,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 116. [2023-02-14 11:45:45,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 65 states have (on average 1.1692307692307693) internal successors, (76), 67 states have internal predecessors, (76), 40 states have call successors, (40), 10 states have call predecessors, (40), 10 states have return successors, (39), 38 states have call predecessors, (39), 39 states have call successors, (39) [2023-02-14 11:45:45,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 155 transitions. [2023-02-14 11:45:45,443 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 155 transitions. Word has length 65 [2023-02-14 11:45:45,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:45:45,443 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 155 transitions. [2023-02-14 11:45:45,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-02-14 11:45:45,444 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 155 transitions. [2023-02-14 11:45:45,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-02-14 11:45:45,446 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:45:45,447 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 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] [2023-02-14 11:45:45,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-14 11:45:45,652 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 [2023-02-14 11:45:45,652 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:45:45,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:45:45,653 INFO L85 PathProgramCache]: Analyzing trace with hash 635379451, now seen corresponding path program 3 times [2023-02-14 11:45:45,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:45:45,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486960221] [2023-02-14 11:45:45,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:45:45,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:45:45,679 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 11:45:45,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [681511631] [2023-02-14 11:45:45,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 11:45:45,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:45:45,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:45:45,701 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) [2023-02-14 11:45:45,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-14 11:45:45,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-14 11:45:45,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:45:45,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 49 conjunts are in the unsatisfiable core [2023-02-14 11:45:45,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:45:47,176 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 37 proven. 14 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-02-14 11:45:47,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:45:48,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:45:48,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486960221] [2023-02-14 11:45:48,317 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 11:45:48,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681511631] [2023-02-14 11:45:48,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681511631] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:45:48,317 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-14 11:45:48,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2023-02-14 11:45:48,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871619602] [2023-02-14 11:45:48,317 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-14 11:45:48,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-14 11:45:48,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:45:48,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-14 11:45:48,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2023-02-14 11:45:48,318 INFO L87 Difference]: Start difference. First operand 116 states and 155 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2023-02-14 11:45:49,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:45:49,354 INFO L93 Difference]: Finished difference Result 125 states and 163 transitions. [2023-02-14 11:45:49,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-14 11:45:49,355 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 70 [2023-02-14 11:45:49,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:45:49,357 INFO L225 Difference]: With dead ends: 125 [2023-02-14 11:45:49,357 INFO L226 Difference]: Without dead ends: 123 [2023-02-14 11:45:49,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2023-02-14 11:45:49,359 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 38 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-14 11:45:49,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 122 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-14 11:45:49,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2023-02-14 11:45:49,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 120. [2023-02-14 11:45:49,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 68 states have (on average 1.161764705882353) internal successors, (79), 70 states have internal predecessors, (79), 40 states have call successors, (40), 11 states have call predecessors, (40), 11 states have return successors, (39), 38 states have call predecessors, (39), 39 states have call successors, (39) [2023-02-14 11:45:49,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 158 transitions. [2023-02-14 11:45:49,385 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 158 transitions. Word has length 70 [2023-02-14 11:45:49,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:45:49,386 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 158 transitions. [2023-02-14 11:45:49,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2023-02-14 11:45:49,386 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 158 transitions. [2023-02-14 11:45:49,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-02-14 11:45:49,386 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:45:49,387 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:45:49,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-14 11:45:49,592 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 [2023-02-14 11:45:49,592 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:45:49,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:45:49,593 INFO L85 PathProgramCache]: Analyzing trace with hash -375209714, now seen corresponding path program 1 times [2023-02-14 11:45:49,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:45:49,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515225815] [2023-02-14 11:45:49,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:45:49,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:45:49,600 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 11:45:49,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1650640004] [2023-02-14 11:45:49,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:45:49,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:45:49,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:45:49,602 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) [2023-02-14 11:45:49,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-14 11:45:49,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:45:49,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 43 conjunts are in the unsatisfiable core [2023-02-14 11:45:49,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:45:49,996 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 16 proven. 17 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2023-02-14 11:45:49,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:45:50,570 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2023-02-14 11:45:50,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:45:50,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515225815] [2023-02-14 11:45:50,570 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 11:45:50,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650640004] [2023-02-14 11:45:50,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650640004] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:45:50,570 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 11:45:50,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2023-02-14 11:45:50,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043196261] [2023-02-14 11:45:50,571 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 11:45:50,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-14 11:45:50,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:45:50,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-14 11:45:50,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2023-02-14 11:45:50,572 INFO L87 Difference]: Start difference. First operand 120 states and 158 transitions. Second operand has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2023-02-14 11:45:58,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:45:58,417 INFO L93 Difference]: Finished difference Result 205 states and 290 transitions. [2023-02-14 11:45:58,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-14 11:45:58,418 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 76 [2023-02-14 11:45:58,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:45:58,419 INFO L225 Difference]: With dead ends: 205 [2023-02-14 11:45:58,419 INFO L226 Difference]: Without dead ends: 201 [2023-02-14 11:45:58,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=309, Invalid=1413, Unknown=0, NotChecked=0, Total=1722 [2023-02-14 11:45:58,420 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 90 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-02-14 11:45:58,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 382 Invalid, 965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 802 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-02-14 11:45:58,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2023-02-14 11:45:58,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 197. [2023-02-14 11:45:58,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 105 states have (on average 1.2) internal successors, (126), 106 states have internal predecessors, (126), 77 states have call successors, (77), 14 states have call predecessors, (77), 14 states have return successors, (76), 76 states have call predecessors, (76), 76 states have call successors, (76) [2023-02-14 11:45:58,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 279 transitions. [2023-02-14 11:45:58,487 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 279 transitions. Word has length 76 [2023-02-14 11:45:58,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:45:58,487 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 279 transitions. [2023-02-14 11:45:58,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2023-02-14 11:45:58,488 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 279 transitions. [2023-02-14 11:45:58,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-02-14 11:45:58,488 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:45:58,489 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:45:58,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-14 11:45:58,694 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 [2023-02-14 11:45:58,694 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:45:58,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:45:58,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1119373286, now seen corresponding path program 4 times [2023-02-14 11:45:58,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:45:58,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888843066] [2023-02-14 11:45:58,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:45:58,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:45:58,715 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 11:45:58,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1782228375] [2023-02-14 11:45:58,716 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 11:45:58,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:45:58,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:45:58,717 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) [2023-02-14 11:45:58,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-14 11:45:58,766 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 11:45:58,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:45:58,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-14 11:45:58,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:45:58,810 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2023-02-14 11:45:58,810 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 11:45:58,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:45:58,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888843066] [2023-02-14 11:45:58,810 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 11:45:58,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782228375] [2023-02-14 11:45:58,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782228375] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 11:45:58,811 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 11:45:58,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-14 11:45:58,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541023365] [2023-02-14 11:45:58,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 11:45:58,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 11:45:58,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:45:58,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 11:45:58,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-14 11:45:58,813 INFO L87 Difference]: Start difference. First operand 197 states and 279 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2023-02-14 11:45:58,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:45:58,912 INFO L93 Difference]: Finished difference Result 250 states and 351 transitions. [2023-02-14 11:45:58,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 11:45:58,913 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 90 [2023-02-14 11:45:58,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:45:58,914 INFO L225 Difference]: With dead ends: 250 [2023-02-14 11:45:58,914 INFO L226 Difference]: Without dead ends: 178 [2023-02-14 11:45:58,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-02-14 11:45:58,915 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 7 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 11:45:58,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 125 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 11:45:58,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2023-02-14 11:45:58,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 164. [2023-02-14 11:45:58,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 88 states have (on average 1.1477272727272727) internal successors, (101), 89 states have internal predecessors, (101), 61 states have call successors, (61), 14 states have call predecessors, (61), 14 states have return successors, (60), 60 states have call predecessors, (60), 60 states have call successors, (60) [2023-02-14 11:45:58,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 222 transitions. [2023-02-14 11:45:58,951 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 222 transitions. Word has length 90 [2023-02-14 11:45:58,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:45:58,951 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 222 transitions. [2023-02-14 11:45:58,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2023-02-14 11:45:58,952 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 222 transitions. [2023-02-14 11:45:58,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-02-14 11:45:58,952 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:45:58,953 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:45:58,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-14 11:45:59,157 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 [2023-02-14 11:45:59,157 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:45:59,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:45:59,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1261079706, now seen corresponding path program 1 times [2023-02-14 11:45:59,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:45:59,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394493809] [2023-02-14 11:45:59,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:45:59,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:45:59,163 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 11:45:59,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [392958672] [2023-02-14 11:45:59,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:45:59,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:45:59,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:45:59,166 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) [2023-02-14 11:45:59,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-14 11:45:59,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:45:59,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 50 conjunts are in the unsatisfiable core [2023-02-14 11:45:59,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:45:59,771 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 51 proven. 28 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2023-02-14 11:45:59,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:46:00,620 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 51 proven. 19 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2023-02-14 11:46:00,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:46:00,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394493809] [2023-02-14 11:46:00,620 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 11:46:00,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392958672] [2023-02-14 11:46:00,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392958672] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:46:00,621 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 11:46:00,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2023-02-14 11:46:00,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369558596] [2023-02-14 11:46:00,621 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 11:46:00,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-14 11:46:00,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:46:00,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-14 11:46:00,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2023-02-14 11:46:00,623 INFO L87 Difference]: Start difference. First operand 164 states and 222 transitions. Second operand has 22 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 19 states have internal predecessors, (43), 11 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 11 states have call predecessors, (30), 10 states have call successors, (30) [2023-02-14 11:46:21,601 WARN L233 SmtUtils]: Spent 18.19s on a formula simplification that was a NOOP. DAG size: 69 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 11:46:27,300 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 11:46:30,506 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 11:46:38,887 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 11:46:48,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:46:48,466 INFO L93 Difference]: Finished difference Result 206 states and 282 transitions. [2023-02-14 11:46:48,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-14 11:46:48,467 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 19 states have internal predecessors, (43), 11 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 11 states have call predecessors, (30), 10 states have call successors, (30) Word has length 92 [2023-02-14 11:46:48,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:46:48,468 INFO L225 Difference]: With dead ends: 206 [2023-02-14 11:46:48,468 INFO L226 Difference]: Without dead ends: 204 [2023-02-14 11:46:48,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 161 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 30.8s TimeCoverageRelationStatistics Valid=334, Invalid=1226, Unknown=0, NotChecked=0, Total=1560 [2023-02-14 11:46:48,470 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 87 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 1051 mSolverCounterSat, 135 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 1189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 1051 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.4s IncrementalHoareTripleChecker+Time [2023-02-14 11:46:48,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 178 Invalid, 1189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 1051 Invalid, 3 Unknown, 0 Unchecked, 17.4s Time] [2023-02-14 11:46:48,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2023-02-14 11:46:48,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 194. [2023-02-14 11:46:48,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 105 states have (on average 1.1428571428571428) internal successors, (120), 107 states have internal predecessors, (120), 73 states have call successors, (73), 15 states have call predecessors, (73), 15 states have return successors, (72), 71 states have call predecessors, (72), 72 states have call successors, (72) [2023-02-14 11:46:48,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 265 transitions. [2023-02-14 11:46:48,543 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 265 transitions. Word has length 92 [2023-02-14 11:46:48,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:46:48,544 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 265 transitions. [2023-02-14 11:46:48,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 19 states have internal predecessors, (43), 11 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 11 states have call predecessors, (30), 10 states have call successors, (30) [2023-02-14 11:46:48,544 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 265 transitions. [2023-02-14 11:46:48,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-02-14 11:46:48,545 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:46:48,545 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:46:48,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-14 11:46:48,750 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 [2023-02-14 11:46:48,750 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:46:48,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:46:48,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1880436805, now seen corresponding path program 2 times [2023-02-14 11:46:48,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:46:48,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512057863] [2023-02-14 11:46:48,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:46:48,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:46:48,761 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 11:46:48,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1299399712] [2023-02-14 11:46:48,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 11:46:48,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:46:48,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:46:48,765 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) [2023-02-14 11:46:48,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-14 11:46:48,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 11:46:48,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:46:48,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 47 conjunts are in the unsatisfiable core [2023-02-14 11:46:48,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:46:49,382 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 31 proven. 38 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2023-02-14 11:46:49,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:46:50,550 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 28 proven. 32 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2023-02-14 11:46:50,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:46:50,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512057863] [2023-02-14 11:46:50,550 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 11:46:50,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299399712] [2023-02-14 11:46:50,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299399712] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:46:50,551 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 11:46:50,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 24 [2023-02-14 11:46:50,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212300791] [2023-02-14 11:46:50,557 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 11:46:50,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-14 11:46:50,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:46:50,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-14 11:46:50,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2023-02-14 11:46:50,559 INFO L87 Difference]: Start difference. First operand 194 states and 265 transitions. Second operand has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 21 states have internal predecessors, (43), 12 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (36), 13 states have call predecessors, (36), 12 states have call successors, (36) [2023-02-14 11:47:24,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:47:24,215 INFO L93 Difference]: Finished difference Result 299 states and 426 transitions. [2023-02-14 11:47:24,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-14 11:47:24,215 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 21 states have internal predecessors, (43), 12 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (36), 13 states have call predecessors, (36), 12 states have call successors, (36) Word has length 109 [2023-02-14 11:47:24,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:47:24,222 INFO L225 Difference]: With dead ends: 299 [2023-02-14 11:47:24,222 INFO L226 Difference]: Without dead ends: 297 [2023-02-14 11:47:24,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 22.2s TimeCoverageRelationStatistics Valid=456, Invalid=1800, Unknown=0, NotChecked=0, Total=2256 [2023-02-14 11:47:24,224 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 104 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 1111 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 1329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 1111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.3s IncrementalHoareTripleChecker+Time [2023-02-14 11:47:24,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 447 Invalid, 1329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 1111 Invalid, 0 Unknown, 0 Unchecked, 12.3s Time] [2023-02-14 11:47:24,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2023-02-14 11:47:24,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 263. [2023-02-14 11:47:24,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 139 states have (on average 1.1654676258992807) internal successors, (162), 141 states have internal predecessors, (162), 105 states have call successors, (105), 18 states have call predecessors, (105), 18 states have return successors, (104), 103 states have call predecessors, (104), 104 states have call successors, (104) [2023-02-14 11:47:24,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 371 transitions. [2023-02-14 11:47:24,369 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 371 transitions. Word has length 109 [2023-02-14 11:47:24,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:47:24,377 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 371 transitions. [2023-02-14 11:47:24,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 21 states have internal predecessors, (43), 12 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (36), 13 states have call predecessors, (36), 12 states have call successors, (36) [2023-02-14 11:47:24,378 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 371 transitions. [2023-02-14 11:47:24,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-02-14 11:47:24,382 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:47:24,382 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:47:24,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-14 11:47:24,584 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 [2023-02-14 11:47:24,584 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:47:24,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:47:24,586 INFO L85 PathProgramCache]: Analyzing trace with hash 468383399, now seen corresponding path program 3 times [2023-02-14 11:47:24,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:47:24,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620912055] [2023-02-14 11:47:24,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:47:24,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:47:24,604 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 11:47:24,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1058895157] [2023-02-14 11:47:24,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 11:47:24,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:47:24,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:47:24,607 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) [2023-02-14 11:47:24,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-14 11:47:24,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-14 11:47:24,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:47:24,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 68 conjunts are in the unsatisfiable core [2023-02-14 11:47:24,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:47:25,159 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 75 proven. 38 refuted. 0 times theorem prover too weak. 340 trivial. 0 not checked. [2023-02-14 11:47:25,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:47:25,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:47:25,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620912055] [2023-02-14 11:47:25,452 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 11:47:25,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058895157] [2023-02-14 11:47:25,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058895157] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:47:25,453 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-14 11:47:25,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2023-02-14 11:47:25,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232388208] [2023-02-14 11:47:25,453 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-14 11:47:25,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-14 11:47:25,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:47:25,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-14 11:47:25,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2023-02-14 11:47:25,454 INFO L87 Difference]: Start difference. First operand 263 states and 371 transitions. Second operand has 17 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2023-02-14 11:47:26,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:47:26,254 INFO L93 Difference]: Finished difference Result 303 states and 422 transitions. [2023-02-14 11:47:26,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-14 11:47:26,254 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) Word has length 112 [2023-02-14 11:47:26,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:47:26,256 INFO L225 Difference]: With dead ends: 303 [2023-02-14 11:47:26,256 INFO L226 Difference]: Without dead ends: 301 [2023-02-14 11:47:26,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2023-02-14 11:47:26,257 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 35 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 870 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-14 11:47:26,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 224 Invalid, 906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 870 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-14 11:47:26,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2023-02-14 11:47:26,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 296. [2023-02-14 11:47:26,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 157 states have (on average 1.1592356687898089) internal successors, (182), 159 states have internal predecessors, (182), 117 states have call successors, (117), 21 states have call predecessors, (117), 21 states have return successors, (116), 115 states have call predecessors, (116), 116 states have call successors, (116) [2023-02-14 11:47:26,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 415 transitions. [2023-02-14 11:47:26,396 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 415 transitions. Word has length 112 [2023-02-14 11:47:26,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:47:26,397 INFO L495 AbstractCegarLoop]: Abstraction has 296 states and 415 transitions. [2023-02-14 11:47:26,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2023-02-14 11:47:26,397 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 415 transitions. [2023-02-14 11:47:26,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-02-14 11:47:26,398 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:47:26,398 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:47:26,403 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-02-14 11:47:26,603 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 [2023-02-14 11:47:26,603 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:47:26,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:47:26,604 INFO L85 PathProgramCache]: Analyzing trace with hash 898620650, now seen corresponding path program 2 times [2023-02-14 11:47:26,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:47:26,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470058570] [2023-02-14 11:47:26,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:47:26,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:47:26,611 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 11:47:26,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [931212072] [2023-02-14 11:47:26,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 11:47:26,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:47:26,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:47:26,614 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) [2023-02-14 11:47:26,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-14 11:47:26,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 11:47:26,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:47:26,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 65 conjunts are in the unsatisfiable core [2023-02-14 11:47:26,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:47:27,232 INFO L134 CoverageAnalysis]: Checked inductivity of 579 backedges. 35 proven. 49 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2023-02-14 11:47:27,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:47:29,833 INFO L134 CoverageAnalysis]: Checked inductivity of 579 backedges. 32 proven. 43 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2023-02-14 11:47:29,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:47:29,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470058570] [2023-02-14 11:47:29,833 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 11:47:29,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931212072] [2023-02-14 11:47:29,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931212072] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:47:29,834 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 11:47:29,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 28 [2023-02-14 11:47:29,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243398814] [2023-02-14 11:47:29,834 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 11:47:29,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-14 11:47:29,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:47:29,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-14 11:47:29,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2023-02-14 11:47:29,845 INFO L87 Difference]: Start difference. First operand 296 states and 415 transitions. Second operand has 28 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 25 states have internal predecessors, (50), 13 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (39), 12 states have call predecessors, (39), 11 states have call successors, (39) [2023-02-14 11:47:54,195 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 11:47:57,042 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 11:48:15,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:48:15,509 INFO L93 Difference]: Finished difference Result 413 states and 590 transitions. [2023-02-14 11:48:15,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-02-14 11:48:15,510 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 25 states have internal predecessors, (50), 13 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (39), 12 states have call predecessors, (39), 11 states have call successors, (39) Word has length 123 [2023-02-14 11:48:15,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:48:15,512 INFO L225 Difference]: With dead ends: 413 [2023-02-14 11:48:15,512 INFO L226 Difference]: Without dead ends: 405 [2023-02-14 11:48:15,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 217 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1214 ImplicationChecksByTransitivity, 24.1s TimeCoverageRelationStatistics Valid=853, Invalid=4117, Unknown=0, NotChecked=0, Total=4970 [2023-02-14 11:48:15,513 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 231 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 1812 mSolverCounterSat, 498 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 605 SdHoareTripleChecker+Invalid, 2312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 498 IncrementalHoareTripleChecker+Valid, 1812 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.1s IncrementalHoareTripleChecker+Time [2023-02-14 11:48:15,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 605 Invalid, 2312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [498 Valid, 1812 Invalid, 2 Unknown, 0 Unchecked, 23.1s Time] [2023-02-14 11:48:15,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2023-02-14 11:48:15,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 381. [2023-02-14 11:48:15,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 198 states have (on average 1.1666666666666667) internal successors, (231), 200 states have internal predecessors, (231), 157 states have call successors, (157), 25 states have call predecessors, (157), 25 states have return successors, (156), 155 states have call predecessors, (156), 156 states have call successors, (156) [2023-02-14 11:48:15,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 544 transitions. [2023-02-14 11:48:15,750 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 544 transitions. Word has length 123 [2023-02-14 11:48:15,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:48:15,752 INFO L495 AbstractCegarLoop]: Abstraction has 381 states and 544 transitions. [2023-02-14 11:48:15,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 25 states have internal predecessors, (50), 13 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (39), 12 states have call predecessors, (39), 11 states have call successors, (39) [2023-02-14 11:48:15,752 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 544 transitions. [2023-02-14 11:48:15,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-02-14 11:48:15,757 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:48:15,758 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:48:15,763 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-02-14 11:48:15,962 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 [2023-02-14 11:48:15,962 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:48:15,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:48:15,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1287524986, now seen corresponding path program 4 times [2023-02-14 11:48:15,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:48:15,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31984231] [2023-02-14 11:48:15,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:48:15,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:48:15,971 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 11:48:15,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [191019901] [2023-02-14 11:48:15,971 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 11:48:15,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:48:15,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:48:15,972 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) [2023-02-14 11:48:15,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-14 11:48:16,034 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 11:48:16,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:48:16,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 72 conjunts are in the unsatisfiable core [2023-02-14 11:48:16,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:48:16,730 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 86 proven. 69 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2023-02-14 11:48:16,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:48:18,312 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 88 proven. 58 refuted. 0 times theorem prover too weak. 585 trivial. 0 not checked. [2023-02-14 11:48:18,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:48:18,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31984231] [2023-02-14 11:48:18,312 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 11:48:18,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191019901] [2023-02-14 11:48:18,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191019901] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:48:18,313 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 11:48:18,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 31 [2023-02-14 11:48:18,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378789657] [2023-02-14 11:48:18,313 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 11:48:18,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-14 11:48:18,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:48:18,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-14 11:48:18,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2023-02-14 11:48:18,316 INFO L87 Difference]: Start difference. First operand 381 states and 544 transitions. Second operand has 31 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 27 states have internal predecessors, (57), 16 states have call successors, (45), 3 states have call predecessors, (45), 3 states have return successors, (44), 16 states have call predecessors, (44), 14 states have call successors, (44) [2023-02-14 11:48:30,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:48:30,323 INFO L93 Difference]: Finished difference Result 446 states and 630 transitions. [2023-02-14 11:48:30,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-14 11:48:30,323 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 27 states have internal predecessors, (57), 16 states have call successors, (45), 3 states have call predecessors, (45), 3 states have return successors, (44), 16 states have call predecessors, (44), 14 states have call successors, (44) Word has length 134 [2023-02-14 11:48:30,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:48:30,325 INFO L225 Difference]: With dead ends: 446 [2023-02-14 11:48:30,325 INFO L226 Difference]: Without dead ends: 444 [2023-02-14 11:48:30,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=534, Invalid=2546, Unknown=0, NotChecked=0, Total=3080 [2023-02-14 11:48:30,327 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 122 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 1347 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 1605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 1347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2023-02-14 11:48:30,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 285 Invalid, 1605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 1347 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2023-02-14 11:48:30,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2023-02-14 11:48:30,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 442. [2023-02-14 11:48:30,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 232 states have (on average 1.1594827586206897) internal successors, (269), 236 states have internal predecessors, (269), 179 states have call successors, (179), 30 states have call predecessors, (179), 30 states have return successors, (178), 175 states have call predecessors, (178), 178 states have call successors, (178) [2023-02-14 11:48:30,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 626 transitions. [2023-02-14 11:48:30,642 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 626 transitions. Word has length 134 [2023-02-14 11:48:30,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:48:30,643 INFO L495 AbstractCegarLoop]: Abstraction has 442 states and 626 transitions. [2023-02-14 11:48:30,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 27 states have internal predecessors, (57), 16 states have call successors, (45), 3 states have call predecessors, (45), 3 states have return successors, (44), 16 states have call predecessors, (44), 14 states have call successors, (44) [2023-02-14 11:48:30,643 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 626 transitions. [2023-02-14 11:48:30,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-02-14 11:48:30,644 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:48:30,644 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:48:30,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-14 11:48:30,844 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 [2023-02-14 11:48:30,845 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:48:30,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:48:30,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1501327478, now seen corresponding path program 5 times [2023-02-14 11:48:30,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:48:30,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616580093] [2023-02-14 11:48:30,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:48:30,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:48:30,852 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 11:48:30,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [891448631] [2023-02-14 11:48:30,853 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-14 11:48:30,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:48:30,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:48:30,854 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) [2023-02-14 11:48:30,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-14 11:48:31,491 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-02-14 11:48:31,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:48:31,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 80 conjunts are in the unsatisfiable core [2023-02-14 11:48:31,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:48:32,616 INFO L134 CoverageAnalysis]: Checked inductivity of 809 backedges. 123 proven. 188 refuted. 0 times theorem prover too weak. 498 trivial. 0 not checked. [2023-02-14 11:48:32,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:48:32,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:48:32,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616580093] [2023-02-14 11:48:32,988 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 11:48:32,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891448631] [2023-02-14 11:48:32,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891448631] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:48:32,988 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-14 11:48:32,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2023-02-14 11:48:32,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198175299] [2023-02-14 11:48:32,988 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-14 11:48:32,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-14 11:48:32,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:48:32,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-14 11:48:32,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2023-02-14 11:48:32,989 INFO L87 Difference]: Start difference. First operand 442 states and 626 transitions. Second operand has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 15 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 10 states have call predecessors, (23), 7 states have call successors, (23) [2023-02-14 11:48:34,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:48:34,469 INFO L93 Difference]: Finished difference Result 460 states and 641 transitions. [2023-02-14 11:48:34,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-14 11:48:34,469 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 15 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 10 states have call predecessors, (23), 7 states have call successors, (23) Word has length 139 [2023-02-14 11:48:34,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:48:34,471 INFO L225 Difference]: With dead ends: 460 [2023-02-14 11:48:34,471 INFO L226 Difference]: Without dead ends: 458 [2023-02-14 11:48:34,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 138 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=168, Invalid=954, Unknown=0, NotChecked=0, Total=1122 [2023-02-14 11:48:34,472 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 37 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 1140 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 1172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-14 11:48:34,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 311 Invalid, 1172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1140 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-14 11:48:34,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2023-02-14 11:48:34,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 454. [2023-02-14 11:48:34,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 241 states have (on average 1.1535269709543567) internal successors, (278), 245 states have internal predecessors, (278), 179 states have call successors, (179), 33 states have call predecessors, (179), 33 states have return successors, (178), 175 states have call predecessors, (178), 178 states have call successors, (178) [2023-02-14 11:48:34,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 635 transitions. [2023-02-14 11:48:34,774 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 635 transitions. Word has length 139 [2023-02-14 11:48:34,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:48:34,774 INFO L495 AbstractCegarLoop]: Abstraction has 454 states and 635 transitions. [2023-02-14 11:48:34,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 15 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 10 states have call predecessors, (23), 7 states have call successors, (23) [2023-02-14 11:48:34,774 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 635 transitions. [2023-02-14 11:48:34,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-02-14 11:48:34,776 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:48:34,776 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:48:34,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-14 11:48:34,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-14 11:48:34,983 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:48:34,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:48:34,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1673937813, now seen corresponding path program 3 times [2023-02-14 11:48:34,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:48:34,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148167056] [2023-02-14 11:48:34,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:48:34,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:48:34,996 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 11:48:34,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [193029953] [2023-02-14 11:48:34,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 11:48:34,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:48:34,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:48:34,998 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:48:35,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-14 11:48:35,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-14 11:48:35,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:48:35,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 48 conjunts are in the unsatisfiable core [2023-02-14 11:48:35,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:48:35,546 INFO L134 CoverageAnalysis]: Checked inductivity of 886 backedges. 90 proven. 37 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2023-02-14 11:48:35,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:48:38,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:48:38,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148167056] [2023-02-14 11:48:38,333 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 11:48:38,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193029953] [2023-02-14 11:48:38,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193029953] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:48:38,333 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-14 11:48:38,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2023-02-14 11:48:38,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603045277] [2023-02-14 11:48:38,334 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-14 11:48:38,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-14 11:48:38,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:48:38,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-14 11:48:38,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=393, Unknown=1, NotChecked=0, Total=462 [2023-02-14 11:48:38,335 INFO L87 Difference]: Start difference. First operand 454 states and 635 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2023-02-14 11:48:39,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:48:39,241 INFO L93 Difference]: Finished difference Result 497 states and 690 transitions. [2023-02-14 11:48:39,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-14 11:48:39,242 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) Word has length 142 [2023-02-14 11:48:39,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:48:39,244 INFO L225 Difference]: With dead ends: 497 [2023-02-14 11:48:39,244 INFO L226 Difference]: Without dead ends: 490 [2023-02-14 11:48:39,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=119, Invalid=636, Unknown=1, NotChecked=0, Total=756 [2023-02-14 11:48:39,245 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 29 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-14 11:48:39,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 160 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-14 11:48:39,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2023-02-14 11:48:39,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 467. [2023-02-14 11:48:39,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 247 states have (on average 1.1497975708502024) internal successors, (284), 250 states have internal predecessors, (284), 184 states have call successors, (184), 35 states have call predecessors, (184), 35 states have return successors, (183), 181 states have call predecessors, (183), 183 states have call successors, (183) [2023-02-14 11:48:39,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 651 transitions. [2023-02-14 11:48:39,592 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 651 transitions. Word has length 142 [2023-02-14 11:48:39,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:48:39,592 INFO L495 AbstractCegarLoop]: Abstraction has 467 states and 651 transitions. [2023-02-14 11:48:39,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2023-02-14 11:48:39,593 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 651 transitions. [2023-02-14 11:48:39,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2023-02-14 11:48:39,594 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:48:39,594 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:48:39,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-02-14 11:48:39,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:48:39,799 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:48:39,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:48:39,799 INFO L85 PathProgramCache]: Analyzing trace with hash -154927127, now seen corresponding path program 6 times [2023-02-14 11:48:39,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:48:39,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079271511] [2023-02-14 11:48:39,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:48:39,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:48:39,805 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 11:48:39,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [736978513] [2023-02-14 11:48:39,805 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-14 11:48:39,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:48:39,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:48:39,809 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:48:39,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-14 11:48:39,917 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-02-14 11:48:39,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:48:39,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 70 conjunts are in the unsatisfiable core [2023-02-14 11:48:39,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:48:40,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1079 backedges. 50 proven. 90 refuted. 0 times theorem prover too weak. 939 trivial. 0 not checked. [2023-02-14 11:48:40,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:48:43,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1079 backedges. 44 proven. 87 refuted. 0 times theorem prover too weak. 948 trivial. 0 not checked. [2023-02-14 11:48:43,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:48:43,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079271511] [2023-02-14 11:48:43,673 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 11:48:43,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736978513] [2023-02-14 11:48:43,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736978513] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:48:43,674 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 11:48:43,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 30 [2023-02-14 11:48:43,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417773509] [2023-02-14 11:48:43,674 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 11:48:43,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-02-14 11:48:43,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:48:43,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-02-14 11:48:43,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2023-02-14 11:48:43,675 INFO L87 Difference]: Start difference. First operand 467 states and 651 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 28 states have internal predecessors, (57), 16 states have call successors, (54), 3 states have call predecessors, (54), 2 states have return successors, (52), 16 states have call predecessors, (52), 16 states have call successors, (52) [2023-02-14 11:49:13,096 WARN L233 SmtUtils]: Spent 11.29s on a formula simplification. DAG size of input: 98 DAG size of output: 87 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 11:49:24,939 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 11:49:59,923 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 11:50:02,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:50:02,862 INFO L93 Difference]: Finished difference Result 659 states and 956 transitions. [2023-02-14 11:50:02,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-02-14 11:50:02,863 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 28 states have internal predecessors, (57), 16 states have call successors, (54), 3 states have call predecessors, (54), 2 states have return successors, (52), 16 states have call predecessors, (52), 16 states have call successors, (52) Word has length 156 [2023-02-14 11:50:02,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:50:02,874 INFO L225 Difference]: With dead ends: 659 [2023-02-14 11:50:02,874 INFO L226 Difference]: Without dead ends: 657 [2023-02-14 11:50:02,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1246 ImplicationChecksByTransitivity, 48.0s TimeCoverageRelationStatistics Valid=962, Invalid=4150, Unknown=0, NotChecked=0, Total=5112 [2023-02-14 11:50:02,877 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 197 mSDsluCounter, 759 mSDsCounter, 0 mSdLazyCounter, 2709 mSolverCounterSat, 539 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 886 SdHoareTripleChecker+Invalid, 3248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 539 IncrementalHoareTripleChecker+Valid, 2709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.4s IncrementalHoareTripleChecker+Time [2023-02-14 11:50:02,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 886 Invalid, 3248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [539 Valid, 2709 Invalid, 0 Unknown, 0 Unchecked, 31.4s Time] [2023-02-14 11:50:02,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2023-02-14 11:50:03,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 635. [2023-02-14 11:50:03,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 321 states have (on average 1.1806853582554517) internal successors, (379), 324 states have internal predecessors, (379), 272 states have call successors, (272), 41 states have call predecessors, (272), 41 states have return successors, (271), 269 states have call predecessors, (271), 271 states have call successors, (271) [2023-02-14 11:50:03,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 922 transitions. [2023-02-14 11:50:03,444 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 922 transitions. Word has length 156 [2023-02-14 11:50:03,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:50:03,445 INFO L495 AbstractCegarLoop]: Abstraction has 635 states and 922 transitions. [2023-02-14 11:50:03,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 28 states have internal predecessors, (57), 16 states have call successors, (54), 3 states have call predecessors, (54), 2 states have return successors, (52), 16 states have call predecessors, (52), 16 states have call successors, (52) [2023-02-14 11:50:03,445 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 922 transitions. [2023-02-14 11:50:03,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2023-02-14 11:50:03,453 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:50:03,453 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:50:03,460 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-02-14 11:50:03,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:50:03,658 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:50:03,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:50:03,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1839611947, now seen corresponding path program 7 times [2023-02-14 11:50:03,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:50:03,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115994206] [2023-02-14 11:50:03,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:50:03,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:50:03,664 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 11:50:03,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1177489632] [2023-02-14 11:50:03,665 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-14 11:50:03,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:50:03,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:50:03,669 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:50:03,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-14 11:50:03,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:50:03,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 78 conjunts are in the unsatisfiable core [2023-02-14 11:50:03,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:50:04,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1174 backedges. 211 proven. 116 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2023-02-14 11:50:04,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:50:04,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:50:04,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115994206] [2023-02-14 11:50:04,914 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 11:50:04,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177489632] [2023-02-14 11:50:04,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177489632] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:50:04,914 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-14 11:50:04,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2023-02-14 11:50:04,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904082895] [2023-02-14 11:50:04,914 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-14 11:50:04,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-14 11:50:04,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:50:04,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-14 11:50:04,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2023-02-14 11:50:04,915 INFO L87 Difference]: Start difference. First operand 635 states and 922 transitions. Second operand has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 16 states have internal predecessors, (37), 10 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 10 states have call predecessors, (27), 9 states have call successors, (27) [2023-02-14 11:50:07,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:50:07,559 INFO L93 Difference]: Finished difference Result 667 states and 961 transitions. [2023-02-14 11:50:07,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-14 11:50:07,560 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 16 states have internal predecessors, (37), 10 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 10 states have call predecessors, (27), 9 states have call successors, (27) Word has length 161 [2023-02-14 11:50:07,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:50:07,578 INFO L225 Difference]: With dead ends: 667 [2023-02-14 11:50:07,578 INFO L226 Difference]: Without dead ends: 665 [2023-02-14 11:50:07,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 143 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=140, Invalid=852, Unknown=0, NotChecked=0, Total=992 [2023-02-14 11:50:07,580 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 57 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 1185 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 1255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-02-14 11:50:07,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 234 Invalid, 1255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1185 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-02-14 11:50:07,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2023-02-14 11:50:08,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 659. [2023-02-14 11:50:08,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 334 states have (on average 1.1796407185628743) internal successors, (394), 337 states have internal predecessors, (394), 280 states have call successors, (280), 44 states have call predecessors, (280), 44 states have return successors, (279), 277 states have call predecessors, (279), 279 states have call successors, (279) [2023-02-14 11:50:08,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 953 transitions. [2023-02-14 11:50:08,201 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 953 transitions. Word has length 161 [2023-02-14 11:50:08,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:50:08,202 INFO L495 AbstractCegarLoop]: Abstraction has 659 states and 953 transitions. [2023-02-14 11:50:08,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 16 states have internal predecessors, (37), 10 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 10 states have call predecessors, (27), 9 states have call successors, (27) [2023-02-14 11:50:08,202 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 953 transitions. [2023-02-14 11:50:08,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2023-02-14 11:50:08,204 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:50:08,204 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:50:08,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-02-14 11:50:08,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:50:08,409 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:50:08,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:50:08,410 INFO L85 PathProgramCache]: Analyzing trace with hash 194788219, now seen corresponding path program 8 times [2023-02-14 11:50:08,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:50:08,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679804733] [2023-02-14 11:50:08,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:50:08,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:50:08,419 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 11:50:08,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [669631406] [2023-02-14 11:50:08,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 11:50:08,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:50:08,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:50:08,428 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:50:08,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-02-14 11:50:08,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 11:50:08,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:50:08,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 95 conjunts are in the unsatisfiable core [2023-02-14 11:50:08,513 INFO L286 TraceCheckSpWp]: Computing forward predicates...