./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 26d01a9c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound20.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 7004d2b01bb7d5c4b1956f589017b61646e33c2f2be997467596b458e0de6322 --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-17 01:44:59,531 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 01:44:59,533 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 01:44:59,566 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 01:44:59,566 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 01:44:59,568 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 01:44:59,570 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 01:44:59,572 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 01:44:59,573 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 01:44:59,577 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 01:44:59,578 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 01:44:59,579 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 01:44:59,579 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 01:44:59,581 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 01:44:59,582 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 01:44:59,583 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 01:44:59,584 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 01:44:59,585 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 01:44:59,586 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 01:44:59,589 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 01:44:59,590 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 01:44:59,591 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 01:44:59,592 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 01:44:59,592 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 01:44:59,598 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 01:44:59,598 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 01:44:59,599 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 01:44:59,600 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 01:44:59,600 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 01:44:59,601 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 01:44:59,601 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 01:44:59,601 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 01:44:59,602 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 01:44:59,604 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 01:44:59,604 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 01:44:59,604 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 01:44:59,605 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 01:44:59,605 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 01:44:59,605 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 01:44:59,606 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 01:44:59,606 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 01:44:59,607 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-17 01:44:59,631 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 01:44:59,631 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 01:44:59,632 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 01:44:59,632 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 01:44:59,633 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 01:44:59,633 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 01:44:59,633 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 01:44:59,633 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 01:44:59,633 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 01:44:59,634 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 01:44:59,634 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 01:44:59,634 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 01:44:59,635 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 01:44:59,635 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 01:44:59,635 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-17 01:44:59,635 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 01:44:59,635 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-17 01:44:59,635 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 01:44:59,635 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-17 01:44:59,636 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 01:44:59,636 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-17 01:44:59,636 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 01:44:59,636 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 01:44:59,636 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 01:44:59,636 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 01:44:59,637 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 01:44:59,637 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 01:44:59,637 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-17 01:44:59,637 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 01:44:59,637 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 01:44:59,638 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 01:44:59,638 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-17 01:44:59,638 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 01:44:59,638 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 01:44:59,638 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 01:44:59,638 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7004d2b01bb7d5c4b1956f589017b61646e33c2f2be997467596b458e0de6322 [2023-02-17 01:44:59,829 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 01:44:59,843 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 01:44:59,846 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 01:44:59,846 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 01:44:59,847 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 01:44:59,847 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound20.c [2023-02-17 01:45:00,755 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 01:45:00,936 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 01:45:00,936 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound20.c [2023-02-17 01:45:00,940 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c97cfdfb2/f25ae2d5d06e402e8d2dfef60fe7c9aa/FLAG40931178a [2023-02-17 01:45:00,956 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c97cfdfb2/f25ae2d5d06e402e8d2dfef60fe7c9aa [2023-02-17 01:45:00,958 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 01:45:00,959 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 01:45:00,959 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 01:45:00,960 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 01:45:00,962 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 01:45:00,962 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 01:45:00" (1/1) ... [2023-02-17 01:45:00,963 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f3b7d7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:45:00, skipping insertion in model container [2023-02-17 01:45:00,963 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 01:45:00" (1/1) ... [2023-02-17 01:45:00,968 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 01:45:00,979 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 01:45:01,094 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound20.c[490,503] [2023-02-17 01:45:01,122 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 01:45:01,132 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 01:45:01,142 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound20.c[490,503] [2023-02-17 01:45:01,160 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 01:45:01,170 INFO L208 MainTranslator]: Completed translation [2023-02-17 01:45:01,171 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:45:01 WrapperNode [2023-02-17 01:45:01,171 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 01:45:01,172 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 01:45:01,172 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 01:45:01,173 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 01:45:01,177 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:45:01" (1/1) ... [2023-02-17 01:45:01,182 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:45:01" (1/1) ... [2023-02-17 01:45:01,199 INFO L138 Inliner]: procedures = 14, calls = 14, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 91 [2023-02-17 01:45:01,200 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 01:45:01,200 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 01:45:01,200 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 01:45:01,201 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 01:45:01,206 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:45:01" (1/1) ... [2023-02-17 01:45:01,207 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:45:01" (1/1) ... [2023-02-17 01:45:01,215 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:45:01" (1/1) ... [2023-02-17 01:45:01,215 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:45:01" (1/1) ... [2023-02-17 01:45:01,223 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:45:01" (1/1) ... [2023-02-17 01:45:01,228 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:45:01" (1/1) ... [2023-02-17 01:45:01,231 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:45:01" (1/1) ... [2023-02-17 01:45:01,232 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:45:01" (1/1) ... [2023-02-17 01:45:01,233 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 01:45:01,234 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 01:45:01,234 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 01:45:01,234 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 01:45:01,235 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:45:01" (1/1) ... [2023-02-17 01:45:01,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 01:45:01,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:45:01,258 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) [2023-02-17 01:45:01,281 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 [2023-02-17 01:45:01,291 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-17 01:45:01,292 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-17 01:45:01,292 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-17 01:45:01,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-17 01:45:01,292 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 01:45:01,292 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 01:45:01,292 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-17 01:45:01,292 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-17 01:45:01,341 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 01:45:01,342 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 01:45:01,446 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 01:45:01,450 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 01:45:01,450 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-17 01:45:01,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 01:45:01 BoogieIcfgContainer [2023-02-17 01:45:01,451 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 01:45:01,453 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 01:45:01,453 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 01:45:01,455 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 01:45:01,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 01:45:00" (1/3) ... [2023-02-17 01:45:01,455 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14fe4c5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 01:45:01, skipping insertion in model container [2023-02-17 01:45:01,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:45:01" (2/3) ... [2023-02-17 01:45:01,456 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14fe4c5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 01:45:01, skipping insertion in model container [2023-02-17 01:45:01,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 01:45:01" (3/3) ... [2023-02-17 01:45:01,457 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound20.c [2023-02-17 01:45:01,468 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 01:45:01,468 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-17 01:45:01,499 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 01:45:01,504 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;@7d717d6f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 01:45:01,504 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-17 01:45:01,507 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 24 states have (on average 1.5) internal successors, (36), 25 states have internal predecessors, (36), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-17 01:45:01,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-17 01:45:01,512 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:45:01,512 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:45:01,513 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:45:01,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:45:01,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1663185933, now seen corresponding path program 1 times [2023-02-17 01:45:01,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:45:01,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291602847] [2023-02-17 01:45:01,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:45:01,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:45:01,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:45:01,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:45:01,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291602847] [2023-02-17 01:45:01,595 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-17 01:45:01,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085915161] [2023-02-17 01:45:01,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:45:01,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:45:01,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:45:01,598 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) [2023-02-17 01:45:01,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-17 01:45:01,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:45:01,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-17 01:45:01,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:45:01,663 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 01:45:01,663 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 01:45:01,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085915161] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 01:45:01,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 01:45:01,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 01:45:01,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290180262] [2023-02-17 01:45:01,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 01:45:01,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-17 01:45:01,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:45:01,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-17 01:45:01,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-17 01:45:01,689 INFO L87 Difference]: Start difference. First operand has 35 states, 24 states have (on average 1.5) internal successors, (36), 25 states have internal predecessors, (36), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 01:45:01,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:45:01,718 INFO L93 Difference]: Finished difference Result 67 states and 103 transitions. [2023-02-17 01:45:01,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-17 01:45:01,720 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, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2023-02-17 01:45:01,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:45:01,734 INFO L225 Difference]: With dead ends: 67 [2023-02-17 01:45:01,757 INFO L226 Difference]: Without dead ends: 31 [2023-02-17 01:45:01,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-17 01:45:01,763 INFO L413 NwaCegarLoop]: 45 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, 45 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 [2023-02-17 01:45:01,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 01:45:01,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-02-17 01:45:01,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-02-17 01:45:01,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 22 states have internal predecessors, (28), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-17 01:45:01,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2023-02-17 01:45:01,821 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 18 [2023-02-17 01:45:01,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:45:01,822 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2023-02-17 01:45:01,822 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, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 01:45:01,822 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2023-02-17 01:45:01,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-17 01:45:01,824 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:45:01,824 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:45:01,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-17 01:45:02,029 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 [2023-02-17 01:45:02,030 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:45:02,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:45:02,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1013747788, now seen corresponding path program 1 times [2023-02-17 01:45:02,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:45:02,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069767248] [2023-02-17 01:45:02,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:45:02,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:45:02,053 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:45:02,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1508960257] [2023-02-17 01:45:02,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:45:02,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:45:02,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:45:02,061 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) [2023-02-17 01:45:02,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-17 01:45:02,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:45:02,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-17 01:45:02,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:45:02,137 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-17 01:45:02,137 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 01:45:02,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:45:02,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069767248] [2023-02-17 01:45:02,138 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:45:02,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508960257] [2023-02-17 01:45:02,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508960257] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 01:45:02,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 01:45:02,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 01:45:02,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126287515] [2023-02-17 01:45:02,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 01:45:02,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 01:45:02,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:45:02,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 01:45:02,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 01:45:02,140 INFO L87 Difference]: Start difference. First operand 31 states and 41 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 01:45:02,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:45:02,154 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2023-02-17 01:45:02,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 01:45:02,155 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2023-02-17 01:45:02,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:45:02,155 INFO L225 Difference]: With dead ends: 40 [2023-02-17 01:45:02,156 INFO L226 Difference]: Without dead ends: 33 [2023-02-17 01:45:02,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 01:45:02,157 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 01:45:02,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 103 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 01:45:02,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-02-17 01:45:02,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2023-02-17 01:45:02,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-17 01:45:02,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2023-02-17 01:45:02,163 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 19 [2023-02-17 01:45:02,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:45:02,164 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2023-02-17 01:45:02,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 01:45:02,164 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2023-02-17 01:45:02,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-17 01:45:02,165 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:45:02,165 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:45:02,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-17 01:45:02,371 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 [2023-02-17 01:45:02,372 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:45:02,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:45:02,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1341775226, now seen corresponding path program 1 times [2023-02-17 01:45:02,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:45:02,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96139719] [2023-02-17 01:45:02,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:45:02,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:45:02,384 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:45:02,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [934281408] [2023-02-17 01:45:02,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:45:02,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:45:02,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:45:02,389 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) [2023-02-17 01:45:02,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-17 01:45:02,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:45:02,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-17 01:45:02,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:45:02,456 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 01:45:02,457 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 01:45:02,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:45:02,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96139719] [2023-02-17 01:45:02,457 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:45:02,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934281408] [2023-02-17 01:45:02,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934281408] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 01:45:02,458 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 01:45:02,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-17 01:45:02,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756820046] [2023-02-17 01:45:02,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 01:45:02,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 01:45:02,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:45:02,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 01:45:02,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-17 01:45:02,460 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 01:45:02,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:45:02,514 INFO L93 Difference]: Finished difference Result 53 states and 71 transitions. [2023-02-17 01:45:02,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 01:45:02,515 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2023-02-17 01:45:02,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:45:02,515 INFO L225 Difference]: With dead ends: 53 [2023-02-17 01:45:02,515 INFO L226 Difference]: Without dead ends: 46 [2023-02-17 01:45:02,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-02-17 01:45:02,516 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 47 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 01:45:02,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 128 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 01:45:02,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-02-17 01:45:02,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 34. [2023-02-17 01:45:02,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-17 01:45:02,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2023-02-17 01:45:02,522 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 20 [2023-02-17 01:45:02,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:45:02,522 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2023-02-17 01:45:02,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 01:45:02,523 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2023-02-17 01:45:02,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-17 01:45:02,523 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:45:02,523 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:45:02,530 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-17 01:45:02,729 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 [2023-02-17 01:45:02,730 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:45:02,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:45:02,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1315139464, now seen corresponding path program 1 times [2023-02-17 01:45:02,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:45:02,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882682327] [2023-02-17 01:45:02,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:45:02,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:45:02,741 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:45:02,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1082388024] [2023-02-17 01:45:02,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:45:02,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:45:02,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:45:02,743 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) [2023-02-17 01:45:02,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-17 01:45:02,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:45:02,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-17 01:45:02,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:45:02,801 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-17 01:45:02,801 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 01:45:02,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:45:02,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882682327] [2023-02-17 01:45:02,802 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:45:02,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082388024] [2023-02-17 01:45:02,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082388024] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 01:45:02,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 01:45:02,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 01:45:02,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939907326] [2023-02-17 01:45:02,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 01:45:02,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 01:45:02,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:45:02,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 01:45:02,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-17 01:45:02,804 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 01:45:02,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:45:02,820 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2023-02-17 01:45:02,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 01:45:02,820 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2023-02-17 01:45:02,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:45:02,821 INFO L225 Difference]: With dead ends: 58 [2023-02-17 01:45:02,821 INFO L226 Difference]: Without dead ends: 36 [2023-02-17 01:45:02,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-17 01:45:02,822 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 01:45:02,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 128 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 01:45:02,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-02-17 01:45:02,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2023-02-17 01:45:02,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-17 01:45:02,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 46 transitions. [2023-02-17 01:45:02,827 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 46 transitions. Word has length 25 [2023-02-17 01:45:02,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:45:02,827 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 46 transitions. [2023-02-17 01:45:02,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 01:45:02,827 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2023-02-17 01:45:02,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-17 01:45:02,828 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:45:02,828 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:45:02,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-17 01:45:03,033 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 [2023-02-17 01:45:03,033 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:45:03,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:45:03,034 INFO L85 PathProgramCache]: Analyzing trace with hash 570907173, now seen corresponding path program 1 times [2023-02-17 01:45:03,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:45:03,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8788202] [2023-02-17 01:45:03,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:45:03,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:45:03,064 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:45:03,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1047153932] [2023-02-17 01:45:03,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:45:03,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:45:03,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:45:03,066 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) [2023-02-17 01:45:03,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-17 01:45:03,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:45:03,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-17 01:45:03,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:45:03,154 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 01:45:03,155 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 01:45:03,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:45:03,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8788202] [2023-02-17 01:45:03,155 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:45:03,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047153932] [2023-02-17 01:45:03,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047153932] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 01:45:03,155 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 01:45:03,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-17 01:45:03,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612129868] [2023-02-17 01:45:03,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 01:45:03,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-17 01:45:03,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:45:03,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-17 01:45:03,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-02-17 01:45:03,157 INFO L87 Difference]: Start difference. First operand 36 states and 46 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 01:45:03,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:45:03,223 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2023-02-17 01:45:03,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-17 01:45:03,224 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2023-02-17 01:45:03,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:45:03,224 INFO L225 Difference]: With dead ends: 54 [2023-02-17 01:45:03,224 INFO L226 Difference]: Without dead ends: 52 [2023-02-17 01:45:03,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-02-17 01:45:03,225 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 55 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 01:45:03,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 176 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 01:45:03,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-02-17 01:45:03,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2023-02-17 01:45:03,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 37 states have internal predecessors, (47), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-17 01:45:03,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 68 transitions. [2023-02-17 01:45:03,231 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 68 transitions. Word has length 25 [2023-02-17 01:45:03,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:45:03,232 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 68 transitions. [2023-02-17 01:45:03,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 01:45:03,232 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 68 transitions. [2023-02-17 01:45:03,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-17 01:45:03,232 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:45:03,233 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:45:03,239 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-02-17 01:45:03,437 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 [2023-02-17 01:45:03,437 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:45:03,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:45:03,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1698298847, now seen corresponding path program 1 times [2023-02-17 01:45:03,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:45:03,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640141714] [2023-02-17 01:45:03,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:45:03,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:45:03,448 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:45:03,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [492009142] [2023-02-17 01:45:03,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:45:03,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:45:03,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:45:03,461 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) [2023-02-17 01:45:03,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-17 01:45:03,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:45:03,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-17 01:45:03,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:45:03,527 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-17 01:45:03,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:45:03,562 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-17 01:45:03,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:45:03,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640141714] [2023-02-17 01:45:03,562 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:45:03,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492009142] [2023-02-17 01:45:03,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492009142] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:45:03,563 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 01:45:03,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2023-02-17 01:45:03,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462827248] [2023-02-17 01:45:03,563 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 01:45:03,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-17 01:45:03,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:45:03,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-17 01:45:03,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-02-17 01:45:03,566 INFO L87 Difference]: Start difference. First operand 51 states and 68 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-17 01:45:03,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:45:03,683 INFO L93 Difference]: Finished difference Result 147 states and 193 transitions. [2023-02-17 01:45:03,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-17 01:45:03,683 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 26 [2023-02-17 01:45:03,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:45:03,685 INFO L225 Difference]: With dead ends: 147 [2023-02-17 01:45:03,685 INFO L226 Difference]: Without dead ends: 140 [2023-02-17 01:45:03,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2023-02-17 01:45:03,686 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 83 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 01:45:03,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 234 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 01:45:03,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2023-02-17 01:45:03,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 97. [2023-02-17 01:45:03,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 69 states have (on average 1.3333333333333333) internal successors, (92), 71 states have internal predecessors, (92), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2023-02-17 01:45:03,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 130 transitions. [2023-02-17 01:45:03,697 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 130 transitions. Word has length 26 [2023-02-17 01:45:03,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:45:03,698 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 130 transitions. [2023-02-17 01:45:03,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-17 01:45:03,698 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 130 transitions. [2023-02-17 01:45:03,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-17 01:45:03,698 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:45:03,699 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:45:03,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-17 01:45:03,903 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 [2023-02-17 01:45:03,904 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:45:03,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:45:03,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1127291835, now seen corresponding path program 1 times [2023-02-17 01:45:03,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:45:03,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205574561] [2023-02-17 01:45:03,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:45:03,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:45:03,912 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:45:03,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1612288917] [2023-02-17 01:45:03,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:45:03,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:45:03,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:45:03,919 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) [2023-02-17 01:45:03,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-17 01:45:03,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:45:03,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-17 01:45:03,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:45:03,978 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 01:45:03,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:45:04,043 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 01:45:04,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:45:04,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205574561] [2023-02-17 01:45:04,044 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:45:04,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612288917] [2023-02-17 01:45:04,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612288917] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:45:04,044 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 01:45:04,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2023-02-17 01:45:04,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629662064] [2023-02-17 01:45:04,044 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 01:45:04,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-17 01:45:04,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:45:04,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-17 01:45:04,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-02-17 01:45:04,045 INFO L87 Difference]: Start difference. First operand 97 states and 130 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 01:45:04,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:45:04,186 INFO L93 Difference]: Finished difference Result 183 states and 261 transitions. [2023-02-17 01:45:04,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-17 01:45:04,186 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), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2023-02-17 01:45:04,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:45:04,189 INFO L225 Difference]: With dead ends: 183 [2023-02-17 01:45:04,189 INFO L226 Difference]: Without dead ends: 171 [2023-02-17 01:45:04,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-02-17 01:45:04,191 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 122 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 01:45:04,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 325 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 01:45:04,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2023-02-17 01:45:04,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 128. [2023-02-17 01:45:04,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 97 states have (on average 1.3505154639175259) internal successors, (131), 98 states have internal predecessors, (131), 23 states have call successors, (23), 7 states have call predecessors, (23), 7 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-02-17 01:45:04,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 176 transitions. [2023-02-17 01:45:04,219 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 176 transitions. Word has length 27 [2023-02-17 01:45:04,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:45:04,219 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 176 transitions. [2023-02-17 01:45:04,219 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), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 01:45:04,219 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 176 transitions. [2023-02-17 01:45:04,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-17 01:45:04,220 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:45:04,220 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:45:04,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-17 01:45:04,420 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 [2023-02-17 01:45:04,420 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:45:04,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:45:04,421 INFO L85 PathProgramCache]: Analyzing trace with hash -200071253, now seen corresponding path program 1 times [2023-02-17 01:45:04,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:45:04,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949785722] [2023-02-17 01:45:04,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:45:04,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:45:04,428 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:45:04,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [540396621] [2023-02-17 01:45:04,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:45:04,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:45:04,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:45:04,434 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) [2023-02-17 01:45:04,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-17 01:45:04,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:45:04,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-17 01:45:04,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:45:04,529 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-17 01:45:04,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:45:04,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:45:04,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949785722] [2023-02-17 01:45:04,584 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:45:04,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540396621] [2023-02-17 01:45:04,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540396621] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 01:45:04,584 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-17 01:45:04,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2023-02-17 01:45:04,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143983590] [2023-02-17 01:45:04,585 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-17 01:45:04,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-17 01:45:04,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:45:04,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-17 01:45:04,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-02-17 01:45:04,586 INFO L87 Difference]: Start difference. First operand 128 states and 176 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-17 01:45:04,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:45:04,654 INFO L93 Difference]: Finished difference Result 143 states and 190 transitions. [2023-02-17 01:45:04,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-17 01:45:04,655 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2023-02-17 01:45:04,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:45:04,656 INFO L225 Difference]: With dead ends: 143 [2023-02-17 01:45:04,656 INFO L226 Difference]: Without dead ends: 141 [2023-02-17 01:45:04,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-02-17 01:45:04,656 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 15 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 01:45:04,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 153 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 01:45:04,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2023-02-17 01:45:04,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2023-02-17 01:45:04,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 106 states have (on average 1.320754716981132) internal successors, (140), 107 states have internal predecessors, (140), 23 states have call successors, (23), 10 states have call predecessors, (23), 10 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-02-17 01:45:04,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 185 transitions. [2023-02-17 01:45:04,666 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 185 transitions. Word has length 30 [2023-02-17 01:45:04,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:45:04,666 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 185 transitions. [2023-02-17 01:45:04,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-17 01:45:04,666 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 185 transitions. [2023-02-17 01:45:04,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-17 01:45:04,667 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:45:04,667 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:45:04,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-17 01:45:04,872 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 [2023-02-17 01:45:04,872 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:45:04,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:45:04,873 INFO L85 PathProgramCache]: Analyzing trace with hash 164485690, now seen corresponding path program 1 times [2023-02-17 01:45:04,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:45:04,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851301414] [2023-02-17 01:45:04,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:45:04,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:45:04,880 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:45:04,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1172769665] [2023-02-17 01:45:04,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:45:04,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:45:04,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:45:04,892 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) [2023-02-17 01:45:04,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-17 01:45:04,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:45:04,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-17 01:45:04,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:45:04,969 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 01:45:04,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:45:05,002 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-17 01:45:05,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:45:05,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851301414] [2023-02-17 01:45:05,003 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:45:05,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172769665] [2023-02-17 01:45:05,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172769665] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:45:05,003 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 01:45:05,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2023-02-17 01:45:05,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655446553] [2023-02-17 01:45:05,009 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 01:45:05,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-17 01:45:05,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:45:05,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-17 01:45:05,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-02-17 01:45:05,012 INFO L87 Difference]: Start difference. First operand 140 states and 185 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 10 states have internal predecessors, (45), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-17 01:45:05,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:45:05,149 INFO L93 Difference]: Finished difference Result 175 states and 237 transitions. [2023-02-17 01:45:05,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-17 01:45:05,149 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 10 states have internal predecessors, (45), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2023-02-17 01:45:05,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:45:05,152 INFO L225 Difference]: With dead ends: 175 [2023-02-17 01:45:05,152 INFO L226 Difference]: Without dead ends: 173 [2023-02-17 01:45:05,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2023-02-17 01:45:05,153 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 75 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 01:45:05,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 333 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 01:45:05,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2023-02-17 01:45:05,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 170. [2023-02-17 01:45:05,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 127 states have (on average 1.3464566929133859) internal successors, (171), 128 states have internal predecessors, (171), 31 states have call successors, (31), 11 states have call predecessors, (31), 11 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2023-02-17 01:45:05,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 232 transitions. [2023-02-17 01:45:05,172 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 232 transitions. Word has length 32 [2023-02-17 01:45:05,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:45:05,172 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 232 transitions. [2023-02-17 01:45:05,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 10 states have internal predecessors, (45), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-17 01:45:05,172 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 232 transitions. [2023-02-17 01:45:05,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-17 01:45:05,174 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:45:05,175 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-02-17 01:45:05,181 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-02-17 01:45:05,379 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 [2023-02-17 01:45:05,379 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:45:05,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:45:05,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1985711111, now seen corresponding path program 1 times [2023-02-17 01:45:05,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:45:05,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657355742] [2023-02-17 01:45:05,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:45:05,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:45:05,399 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:45:05,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [373170724] [2023-02-17 01:45:05,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:45:05,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:45:05,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:45:05,402 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) [2023-02-17 01:45:05,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-17 01:45:05,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:45:05,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-17 01:45:05,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:45:05,466 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-17 01:45:05,466 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 01:45:05,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:45:05,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657355742] [2023-02-17 01:45:05,466 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:45:05,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373170724] [2023-02-17 01:45:05,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373170724] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 01:45:05,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 01:45:05,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 01:45:05,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013691169] [2023-02-17 01:45:05,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 01:45:05,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 01:45:05,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:45:05,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 01:45:05,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-02-17 01:45:05,469 INFO L87 Difference]: Start difference. First operand 170 states and 232 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 01:45:05,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:45:05,490 INFO L93 Difference]: Finished difference Result 237 states and 325 transitions. [2023-02-17 01:45:05,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 01:45:05,491 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2023-02-17 01:45:05,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:45:05,492 INFO L225 Difference]: With dead ends: 237 [2023-02-17 01:45:05,492 INFO L226 Difference]: Without dead ends: 170 [2023-02-17 01:45:05,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-02-17 01:45:05,505 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 2 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 01:45:05,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 105 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 01:45:05,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2023-02-17 01:45:05,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2023-02-17 01:45:05,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 127 states have (on average 1.3385826771653544) internal successors, (170), 128 states have internal predecessors, (170), 31 states have call successors, (31), 11 states have call predecessors, (31), 11 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2023-02-17 01:45:05,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 231 transitions. [2023-02-17 01:45:05,516 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 231 transitions. Word has length 32 [2023-02-17 01:45:05,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:45:05,516 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 231 transitions. [2023-02-17 01:45:05,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 01:45:05,516 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 231 transitions. [2023-02-17 01:45:05,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-17 01:45:05,516 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:45:05,516 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 1, 1] [2023-02-17 01:45:05,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-17 01:45:05,721 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 [2023-02-17 01:45:05,721 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:45:05,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:45:05,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1730540965, now seen corresponding path program 1 times [2023-02-17 01:45:05,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:45:05,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506881386] [2023-02-17 01:45:05,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:45:05,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:45:05,731 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:45:05,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1316499732] [2023-02-17 01:45:05,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:45:05,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:45:05,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:45:05,732 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) [2023-02-17 01:45:05,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-17 01:45:05,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:45:05,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-17 01:45:05,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:45:05,794 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 01:45:05,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:45:05,824 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-17 01:45:05,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:45:05,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506881386] [2023-02-17 01:45:05,824 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:45:05,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316499732] [2023-02-17 01:45:05,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316499732] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-17 01:45:05,825 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 01:45:05,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 9 [2023-02-17 01:45:05,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248984914] [2023-02-17 01:45:05,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 01:45:05,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 01:45:05,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:45:05,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 01:45:05,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-02-17 01:45:05,826 INFO L87 Difference]: Start difference. First operand 170 states and 231 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-17 01:45:05,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:45:05,872 INFO L93 Difference]: Finished difference Result 235 states and 331 transitions. [2023-02-17 01:45:05,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 01:45:05,872 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2023-02-17 01:45:05,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:45:05,873 INFO L225 Difference]: With dead ends: 235 [2023-02-17 01:45:05,874 INFO L226 Difference]: Without dead ends: 233 [2023-02-17 01:45:05,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-02-17 01:45:05,874 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 9 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 01:45:05,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 160 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 01:45:05,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2023-02-17 01:45:05,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 226. [2023-02-17 01:45:05,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 160 states have (on average 1.36875) internal successors, (219), 161 states have internal predecessors, (219), 51 states have call successors, (51), 14 states have call predecessors, (51), 14 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2023-02-17 01:45:05,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 320 transitions. [2023-02-17 01:45:05,890 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 320 transitions. Word has length 35 [2023-02-17 01:45:05,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:45:05,890 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 320 transitions. [2023-02-17 01:45:05,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-17 01:45:05,890 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 320 transitions. [2023-02-17 01:45:05,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-17 01:45:05,891 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:45:05,891 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:45:05,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-17 01:45:06,095 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 [2023-02-17 01:45:06,095 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:45:06,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:45:06,096 INFO L85 PathProgramCache]: Analyzing trace with hash -2009961290, now seen corresponding path program 1 times [2023-02-17 01:45:06,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:45:06,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429645654] [2023-02-17 01:45:06,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:45:06,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:45:06,102 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:45:06,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1481609076] [2023-02-17 01:45:06,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:45:06,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:45:06,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:45:06,103 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) [2023-02-17 01:45:06,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-17 01:45:06,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:45:06,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 39 conjunts are in the unsatisfiable core [2023-02-17 01:45:06,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:45:06,218 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 01:45:06,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:45:06,311 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-17 01:45:06,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:45:06,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429645654] [2023-02-17 01:45:06,312 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:45:06,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481609076] [2023-02-17 01:45:06,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481609076] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:45:06,312 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 01:45:06,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 19 [2023-02-17 01:45:06,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52013774] [2023-02-17 01:45:06,313 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 01:45:06,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-17 01:45:06,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:45:06,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-17 01:45:06,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2023-02-17 01:45:06,314 INFO L87 Difference]: Start difference. First operand 226 states and 320 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 17 states have internal predecessors, (51), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-17 01:45:09,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:45:09,326 INFO L93 Difference]: Finished difference Result 370 states and 531 transitions. [2023-02-17 01:45:09,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-17 01:45:09,326 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 17 states have internal predecessors, (51), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 37 [2023-02-17 01:45:09,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:45:09,329 INFO L225 Difference]: With dead ends: 370 [2023-02-17 01:45:09,329 INFO L226 Difference]: Without dead ends: 368 [2023-02-17 01:45:09,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=292, Invalid=1268, Unknown=0, NotChecked=0, Total=1560 [2023-02-17 01:45:09,330 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 209 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-02-17 01:45:09,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 343 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 674 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-02-17 01:45:09,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2023-02-17 01:45:09,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 315. [2023-02-17 01:45:09,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 235 states have (on average 1.3914893617021276) internal successors, (327), 242 states have internal predecessors, (327), 63 states have call successors, (63), 16 states have call predecessors, (63), 16 states have return successors, (62), 56 states have call predecessors, (62), 62 states have call successors, (62) [2023-02-17 01:45:09,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 452 transitions. [2023-02-17 01:45:09,385 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 452 transitions. Word has length 37 [2023-02-17 01:45:09,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:45:09,386 INFO L495 AbstractCegarLoop]: Abstraction has 315 states and 452 transitions. [2023-02-17 01:45:09,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 17 states have internal predecessors, (51), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-17 01:45:09,386 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 452 transitions. [2023-02-17 01:45:09,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-17 01:45:09,388 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:45:09,388 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 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] [2023-02-17 01:45:09,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-17 01:45:09,593 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 [2023-02-17 01:45:09,593 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:45:09,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:45:09,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1954288725, now seen corresponding path program 1 times [2023-02-17 01:45:09,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:45:09,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195136645] [2023-02-17 01:45:09,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:45:09,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:45:09,606 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:45:09,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1766134975] [2023-02-17 01:45:09,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:45:09,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:45:09,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:45:09,608 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) [2023-02-17 01:45:09,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-17 01:45:09,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:45:09,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-17 01:45:09,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:45:09,664 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-17 01:45:09,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:45:09,761 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-17 01:45:09,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:45:09,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195136645] [2023-02-17 01:45:09,762 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:45:09,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766134975] [2023-02-17 01:45:09,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766134975] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-17 01:45:09,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 01:45:09,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 9 [2023-02-17 01:45:09,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588524429] [2023-02-17 01:45:09,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 01:45:09,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 01:45:09,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:45:09,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 01:45:09,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-02-17 01:45:09,763 INFO L87 Difference]: Start difference. First operand 315 states and 452 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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) [2023-02-17 01:45:09,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:45:09,821 INFO L93 Difference]: Finished difference Result 324 states and 460 transitions. [2023-02-17 01:45:09,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 01:45:09,822 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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 40 [2023-02-17 01:45:09,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:45:09,823 INFO L225 Difference]: With dead ends: 324 [2023-02-17 01:45:09,823 INFO L226 Difference]: Without dead ends: 322 [2023-02-17 01:45:09,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-02-17 01:45:09,824 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 11 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 01:45:09,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 130 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 01:45:09,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2023-02-17 01:45:09,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 319. [2023-02-17 01:45:09,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 238 states have (on average 1.3781512605042017) internal successors, (328), 245 states have internal predecessors, (328), 63 states have call successors, (63), 17 states have call predecessors, (63), 17 states have return successors, (62), 56 states have call predecessors, (62), 62 states have call successors, (62) [2023-02-17 01:45:09,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 453 transitions. [2023-02-17 01:45:09,860 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 453 transitions. Word has length 40 [2023-02-17 01:45:09,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:45:09,860 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 453 transitions. [2023-02-17 01:45:09,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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) [2023-02-17 01:45:09,860 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 453 transitions. [2023-02-17 01:45:09,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-17 01:45:09,861 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:45:09,861 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:45:09,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-17 01:45:10,065 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 [2023-02-17 01:45:10,066 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:45:10,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:45:10,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1977082887, now seen corresponding path program 1 times [2023-02-17 01:45:10,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:45:10,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161038865] [2023-02-17 01:45:10,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:45:10,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:45:10,072 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:45:10,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1658498317] [2023-02-17 01:45:10,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:45:10,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:45:10,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:45:10,073 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) [2023-02-17 01:45:10,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-17 01:45:10,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:45:10,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-17 01:45:10,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:45:10,124 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-17 01:45:10,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:45:10,148 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-17 01:45:10,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:45:10,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161038865] [2023-02-17 01:45:10,149 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:45:10,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658498317] [2023-02-17 01:45:10,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658498317] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:45:10,149 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 01:45:10,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2023-02-17 01:45:10,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693452858] [2023-02-17 01:45:10,149 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 01:45:10,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-17 01:45:10,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:45:10,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-17 01:45:10,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2023-02-17 01:45:10,150 INFO L87 Difference]: Start difference. First operand 319 states and 453 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-17 01:45:10,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:45:10,328 INFO L93 Difference]: Finished difference Result 781 states and 1094 transitions. [2023-02-17 01:45:10,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-17 01:45:10,329 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 38 [2023-02-17 01:45:10,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:45:10,331 INFO L225 Difference]: With dead ends: 781 [2023-02-17 01:45:10,331 INFO L226 Difference]: Without dead ends: 592 [2023-02-17 01:45:10,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2023-02-17 01:45:10,332 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 136 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 01:45:10,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 264 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 01:45:10,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2023-02-17 01:45:10,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 562. [2023-02-17 01:45:10,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 406 states have (on average 1.3177339901477831) internal successors, (535), 416 states have internal predecessors, (535), 114 states have call successors, (114), 41 states have call predecessors, (114), 41 states have return successors, (110), 104 states have call predecessors, (110), 110 states have call successors, (110) [2023-02-17 01:45:10,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 759 transitions. [2023-02-17 01:45:10,395 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 759 transitions. Word has length 38 [2023-02-17 01:45:10,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:45:10,396 INFO L495 AbstractCegarLoop]: Abstraction has 562 states and 759 transitions. [2023-02-17 01:45:10,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-17 01:45:10,396 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 759 transitions. [2023-02-17 01:45:10,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-17 01:45:10,398 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:45:10,398 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:45:10,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-17 01:45:10,602 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 [2023-02-17 01:45:10,603 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:45:10,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:45:10,603 INFO L85 PathProgramCache]: Analyzing trace with hash 321915013, now seen corresponding path program 2 times [2023-02-17 01:45:10,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:45:10,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091679164] [2023-02-17 01:45:10,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:45:10,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:45:10,608 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:45:10,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [563531216] [2023-02-17 01:45:10,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 01:45:10,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:45:10,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:45:10,609 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) [2023-02-17 01:45:10,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-17 01:45:10,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 01:45:10,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 01:45:10,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-17 01:45:10,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:45:10,653 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-17 01:45:10,653 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 01:45:10,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:45:10,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091679164] [2023-02-17 01:45:10,653 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:45:10,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563531216] [2023-02-17 01:45:10,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563531216] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 01:45:10,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 01:45:10,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 01:45:10,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130124300] [2023-02-17 01:45:10,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 01:45:10,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 01:45:10,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:45:10,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 01:45:10,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 01:45:10,655 INFO L87 Difference]: Start difference. First operand 562 states and 759 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 01:45:10,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:45:10,777 INFO L93 Difference]: Finished difference Result 874 states and 1229 transitions. [2023-02-17 01:45:10,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 01:45:10,778 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 39 [2023-02-17 01:45:10,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:45:10,780 INFO L225 Difference]: With dead ends: 874 [2023-02-17 01:45:10,780 INFO L226 Difference]: Without dead ends: 679 [2023-02-17 01:45:10,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-02-17 01:45:10,781 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 30 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 01:45:10,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 153 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 01:45:10,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2023-02-17 01:45:10,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 553. [2023-02-17 01:45:10,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 401 states have (on average 1.3167082294264338) internal successors, (528), 411 states have internal predecessors, (528), 110 states have call successors, (110), 41 states have call predecessors, (110), 41 states have return successors, (106), 100 states have call predecessors, (106), 106 states have call successors, (106) [2023-02-17 01:45:10,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 744 transitions. [2023-02-17 01:45:10,837 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 744 transitions. Word has length 39 [2023-02-17 01:45:10,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:45:10,837 INFO L495 AbstractCegarLoop]: Abstraction has 553 states and 744 transitions. [2023-02-17 01:45:10,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 01:45:10,838 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 744 transitions. [2023-02-17 01:45:10,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-17 01:45:10,838 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:45:10,838 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:45:10,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-17 01:45:11,046 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 [2023-02-17 01:45:11,049 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:45:11,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:45:11,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1715872859, now seen corresponding path program 1 times [2023-02-17 01:45:11,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:45:11,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934608029] [2023-02-17 01:45:11,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:45:11,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:45:11,055 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:45:11,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [537616315] [2023-02-17 01:45:11,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:45:11,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:45:11,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:45:11,056 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) [2023-02-17 01:45:11,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-17 01:45:11,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:45:11,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-17 01:45:11,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:45:11,109 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-17 01:45:11,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:45:11,150 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-17 01:45:11,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:45:11,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934608029] [2023-02-17 01:45:11,151 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:45:11,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537616315] [2023-02-17 01:45:11,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537616315] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:45:11,151 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 01:45:11,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-02-17 01:45:11,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800215783] [2023-02-17 01:45:11,151 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 01:45:11,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-17 01:45:11,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:45:11,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-17 01:45:11,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-02-17 01:45:11,152 INFO L87 Difference]: Start difference. First operand 553 states and 744 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-17 01:45:11,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:45:11,413 INFO L93 Difference]: Finished difference Result 1157 states and 1577 transitions. [2023-02-17 01:45:11,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-17 01:45:11,414 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 39 [2023-02-17 01:45:11,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:45:11,417 INFO L225 Difference]: With dead ends: 1157 [2023-02-17 01:45:11,417 INFO L226 Difference]: Without dead ends: 817 [2023-02-17 01:45:11,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2023-02-17 01:45:11,418 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 212 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 01:45:11,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 360 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 01:45:11,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2023-02-17 01:45:11,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 780. [2023-02-17 01:45:11,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 558 states have (on average 1.2724014336917562) internal successors, (710), 572 states have internal predecessors, (710), 164 states have call successors, (164), 57 states have call predecessors, (164), 57 states have return successors, (158), 150 states have call predecessors, (158), 158 states have call successors, (158) [2023-02-17 01:45:11,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 1032 transitions. [2023-02-17 01:45:11,504 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 1032 transitions. Word has length 39 [2023-02-17 01:45:11,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:45:11,504 INFO L495 AbstractCegarLoop]: Abstraction has 780 states and 1032 transitions. [2023-02-17 01:45:11,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-17 01:45:11,504 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 1032 transitions. [2023-02-17 01:45:11,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-17 01:45:11,505 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:45:11,505 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:45:11,519 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-02-17 01:45:11,709 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 [2023-02-17 01:45:11,709 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:45:11,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:45:11,710 INFO L85 PathProgramCache]: Analyzing trace with hash 753696694, now seen corresponding path program 1 times [2023-02-17 01:45:11,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:45:11,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8494646] [2023-02-17 01:45:11,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:45:11,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:45:11,721 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:45:11,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1643341712] [2023-02-17 01:45:11,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:45:11,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:45:11,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:45:11,723 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) [2023-02-17 01:45:11,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-17 01:45:11,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:45:11,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 55 conjunts are in the unsatisfiable core [2023-02-17 01:45:11,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:45:11,918 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-17 01:45:11,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:45:12,831 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-02-17 01:45:12,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:45:12,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8494646] [2023-02-17 01:45:12,832 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:45:12,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643341712] [2023-02-17 01:45:12,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643341712] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:45:12,832 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 01:45:12,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 27 [2023-02-17 01:45:12,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734411294] [2023-02-17 01:45:12,832 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 01:45:12,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-17 01:45:12,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:45:12,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-17 01:45:12,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2023-02-17 01:45:12,833 INFO L87 Difference]: Start difference. First operand 780 states and 1032 transitions. Second operand has 27 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 8 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2023-02-17 01:45:33,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:45:33,012 INFO L93 Difference]: Finished difference Result 1216 states and 1687 transitions. [2023-02-17 01:45:33,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-02-17 01:45:33,013 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 8 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) Word has length 54 [2023-02-17 01:45:33,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:45:33,016 INFO L225 Difference]: With dead ends: 1216 [2023-02-17 01:45:33,016 INFO L226 Difference]: Without dead ends: 1194 [2023-02-17 01:45:33,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=745, Invalid=3545, Unknown=0, NotChecked=0, Total=4290 [2023-02-17 01:45:33,018 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 317 mSDsluCounter, 772 mSDsCounter, 0 mSdLazyCounter, 2195 mSolverCounterSat, 336 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 841 SdHoareTripleChecker+Invalid, 2531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 336 IncrementalHoareTripleChecker+Valid, 2195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.9s IncrementalHoareTripleChecker+Time [2023-02-17 01:45:33,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 841 Invalid, 2531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [336 Valid, 2195 Invalid, 0 Unknown, 0 Unchecked, 14.9s Time] [2023-02-17 01:45:33,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2023-02-17 01:45:33,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 856. [2023-02-17 01:45:33,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 613 states have (on average 1.272430668841762) internal successors, (780), 623 states have internal predecessors, (780), 181 states have call successors, (181), 61 states have call predecessors, (181), 61 states have return successors, (176), 171 states have call predecessors, (176), 176 states have call successors, (176) [2023-02-17 01:45:33,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 1137 transitions. [2023-02-17 01:45:33,199 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 1137 transitions. Word has length 54 [2023-02-17 01:45:33,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:45:33,199 INFO L495 AbstractCegarLoop]: Abstraction has 856 states and 1137 transitions. [2023-02-17 01:45:33,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 8 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2023-02-17 01:45:33,200 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 1137 transitions. [2023-02-17 01:45:33,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-02-17 01:45:33,200 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:45:33,200 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:45:33,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-17 01:45:33,404 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 [2023-02-17 01:45:33,405 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:45:33,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:45:33,405 INFO L85 PathProgramCache]: Analyzing trace with hash -2108492507, now seen corresponding path program 1 times [2023-02-17 01:45:33,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:45:33,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554128134] [2023-02-17 01:45:33,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:45:33,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:45:33,410 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:45:33,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [313615053] [2023-02-17 01:45:33,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:45:33,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:45:33,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:45:33,412 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) [2023-02-17 01:45:33,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-17 01:45:33,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:45:33,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-17 01:45:33,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:45:33,478 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-17 01:45:33,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:45:33,529 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-17 01:45:33,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:45:33,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554128134] [2023-02-17 01:45:33,529 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:45:33,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313615053] [2023-02-17 01:45:33,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313615053] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:45:33,530 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 01:45:33,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2023-02-17 01:45:33,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914255303] [2023-02-17 01:45:33,530 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 01:45:33,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-17 01:45:33,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:45:33,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-17 01:45:33,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2023-02-17 01:45:33,531 INFO L87 Difference]: Start difference. First operand 856 states and 1137 transitions. Second operand has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 18 states have internal predecessors, (67), 5 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2023-02-17 01:45:34,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:45:34,134 INFO L93 Difference]: Finished difference Result 1850 states and 2568 transitions. [2023-02-17 01:45:34,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-17 01:45:34,135 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 18 states have internal predecessors, (67), 5 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 60 [2023-02-17 01:45:34,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:45:34,140 INFO L225 Difference]: With dead ends: 1850 [2023-02-17 01:45:34,140 INFO L226 Difference]: Without dead ends: 1828 [2023-02-17 01:45:34,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=287, Invalid=525, Unknown=0, NotChecked=0, Total=812 [2023-02-17 01:45:34,141 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 357 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 01:45:34,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [357 Valid, 388 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 01:45:34,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1828 states. [2023-02-17 01:45:34,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1828 to 1729. [2023-02-17 01:45:34,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1729 states, 1252 states have (on average 1.299520766773163) internal successors, (1627), 1285 states have internal predecessors, (1627), 379 states have call successors, (379), 97 states have call predecessors, (379), 97 states have return successors, (370), 346 states have call predecessors, (370), 370 states have call successors, (370) [2023-02-17 01:45:34,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1729 states to 1729 states and 2376 transitions. [2023-02-17 01:45:34,492 INFO L78 Accepts]: Start accepts. Automaton has 1729 states and 2376 transitions. Word has length 60 [2023-02-17 01:45:34,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:45:34,493 INFO L495 AbstractCegarLoop]: Abstraction has 1729 states and 2376 transitions. [2023-02-17 01:45:34,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 18 states have internal predecessors, (67), 5 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2023-02-17 01:45:34,493 INFO L276 IsEmpty]: Start isEmpty. Operand 1729 states and 2376 transitions. [2023-02-17 01:45:34,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-02-17 01:45:34,494 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:45:34,494 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:45:34,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-17 01:45:34,698 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 [2023-02-17 01:45:34,699 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:45:34,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:45:34,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1269665814, now seen corresponding path program 1 times [2023-02-17 01:45:34,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:45:34,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637743026] [2023-02-17 01:45:34,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:45:34,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:45:34,704 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:45:34,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [117019640] [2023-02-17 01:45:34,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:45:34,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:45:34,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:45:34,705 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) [2023-02-17 01:45:34,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-17 01:45:34,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:45:34,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-17 01:45:34,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:45:34,752 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-17 01:45:34,752 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 01:45:34,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:45:34,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637743026] [2023-02-17 01:45:34,752 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:45:34,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117019640] [2023-02-17 01:45:34,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117019640] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 01:45:34,753 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 01:45:34,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 01:45:34,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307558676] [2023-02-17 01:45:34,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 01:45:34,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 01:45:34,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:45:34,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 01:45:34,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-17 01:45:34,754 INFO L87 Difference]: Start difference. First operand 1729 states and 2376 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-02-17 01:45:35,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:45:35,190 INFO L93 Difference]: Finished difference Result 3297 states and 4600 transitions. [2023-02-17 01:45:35,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 01:45:35,191 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 62 [2023-02-17 01:45:35,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:45:35,197 INFO L225 Difference]: With dead ends: 3297 [2023-02-17 01:45:35,198 INFO L226 Difference]: Without dead ends: 2086 [2023-02-17 01:45:35,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-02-17 01:45:35,200 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 11 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 01:45:35,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 111 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 01:45:35,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2086 states. [2023-02-17 01:45:35,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2086 to 1936. [2023-02-17 01:45:35,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1936 states, 1366 states have (on average 1.3030746705710103) internal successors, (1780), 1401 states have internal predecessors, (1780), 473 states have call successors, (473), 96 states have call predecessors, (473), 96 states have return successors, (464), 438 states have call predecessors, (464), 464 states have call successors, (464) [2023-02-17 01:45:35,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1936 states to 1936 states and 2717 transitions. [2023-02-17 01:45:35,638 INFO L78 Accepts]: Start accepts. Automaton has 1936 states and 2717 transitions. Word has length 62 [2023-02-17 01:45:35,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:45:35,639 INFO L495 AbstractCegarLoop]: Abstraction has 1936 states and 2717 transitions. [2023-02-17 01:45:35,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-02-17 01:45:35,639 INFO L276 IsEmpty]: Start isEmpty. Operand 1936 states and 2717 transitions. [2023-02-17 01:45:35,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-02-17 01:45:35,639 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:45:35,640 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 3, 2, 2, 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] [2023-02-17 01:45:35,644 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-02-17 01:45:35,844 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 [2023-02-17 01:45:35,844 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:45:35,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:45:35,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1765617383, now seen corresponding path program 1 times [2023-02-17 01:45:35,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:45:35,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201626779] [2023-02-17 01:45:35,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:45:35,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:45:35,851 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:45:35,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [838144620] [2023-02-17 01:45:35,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:45:35,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:45:35,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:45:35,852 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) [2023-02-17 01:45:35,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-17 01:45:35,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:45:35,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 45 conjunts are in the unsatisfiable core [2023-02-17 01:45:35,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:45:36,017 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 10 proven. 19 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-02-17 01:45:36,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:45:36,487 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-02-17 01:45:36,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:45:36,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201626779] [2023-02-17 01:45:36,488 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:45:36,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838144620] [2023-02-17 01:45:36,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838144620] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:45:36,488 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 01:45:36,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2023-02-17 01:45:36,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642066084] [2023-02-17 01:45:36,489 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 01:45:36,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-17 01:45:36,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:45:36,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-17 01:45:36,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2023-02-17 01:45:36,490 INFO L87 Difference]: Start difference. First operand 1936 states and 2717 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 18 states have internal predecessors, (62), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2023-02-17 01:45:49,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:45:49,117 INFO L93 Difference]: Finished difference Result 2304 states and 3183 transitions. [2023-02-17 01:45:49,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-17 01:45:49,118 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 18 states have internal predecessors, (62), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 64 [2023-02-17 01:45:49,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:45:49,125 INFO L225 Difference]: With dead ends: 2304 [2023-02-17 01:45:49,125 INFO L226 Difference]: Without dead ends: 2298 [2023-02-17 01:45:49,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=316, Invalid=1324, Unknown=0, NotChecked=0, Total=1640 [2023-02-17 01:45:49,126 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 210 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 737 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2023-02-17 01:45:49,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 579 Invalid, 936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 737 Invalid, 0 Unknown, 0 Unchecked, 9.0s Time] [2023-02-17 01:45:49,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2298 states. [2023-02-17 01:45:49,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2298 to 2181. [2023-02-17 01:45:49,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2181 states, 1549 states have (on average 1.3021304067140091) internal successors, (2017), 1587 states have internal predecessors, (2017), 516 states have call successors, (516), 116 states have call predecessors, (516), 115 states have return successors, (508), 477 states have call predecessors, (508), 508 states have call successors, (508) [2023-02-17 01:45:49,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2181 states to 2181 states and 3041 transitions. [2023-02-17 01:45:49,741 INFO L78 Accepts]: Start accepts. Automaton has 2181 states and 3041 transitions. Word has length 64 [2023-02-17 01:45:49,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:45:49,741 INFO L495 AbstractCegarLoop]: Abstraction has 2181 states and 3041 transitions. [2023-02-17 01:45:49,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 18 states have internal predecessors, (62), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2023-02-17 01:45:49,741 INFO L276 IsEmpty]: Start isEmpty. Operand 2181 states and 3041 transitions. [2023-02-17 01:45:49,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-02-17 01:45:49,745 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:45:49,745 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:45:49,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-17 01:45:49,950 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 [2023-02-17 01:45:49,950 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:45:49,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:45:49,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1447364546, now seen corresponding path program 2 times [2023-02-17 01:45:49,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:45:49,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959994597] [2023-02-17 01:45:49,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:45:49,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:45:49,955 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:45:49,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1223699313] [2023-02-17 01:45:49,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 01:45:49,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:45:49,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:45:49,956 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) [2023-02-17 01:45:49,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-17 01:45:50,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 01:45:50,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 01:45:50,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-17 01:45:50,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:45:50,642 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 13 proven. 38 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-17 01:45:50,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:45:51,064 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 32 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-17 01:45:51,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:45:51,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959994597] [2023-02-17 01:45:51,064 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:45:51,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223699313] [2023-02-17 01:45:51,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223699313] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:45:51,065 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 01:45:51,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8] total 23 [2023-02-17 01:45:51,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556903896] [2023-02-17 01:45:51,065 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 01:45:51,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-17 01:45:51,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:45:51,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-17 01:45:51,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2023-02-17 01:45:51,066 INFO L87 Difference]: Start difference. First operand 2181 states and 3041 transitions. Second operand has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 19 states have internal predecessors, (76), 6 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2023-02-17 01:46:20,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:46:20,090 INFO L93 Difference]: Finished difference Result 2820 states and 3974 transitions. [2023-02-17 01:46:20,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-02-17 01:46:20,090 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 19 states have internal predecessors, (76), 6 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 66 [2023-02-17 01:46:20,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:46:20,098 INFO L225 Difference]: With dead ends: 2820 [2023-02-17 01:46:20,098 INFO L226 Difference]: Without dead ends: 2818 [2023-02-17 01:46:20,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1314 ImplicationChecksByTransitivity, 20.8s TimeCoverageRelationStatistics Valid=872, Invalid=4098, Unknown=0, NotChecked=0, Total=4970 [2023-02-17 01:46:20,100 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 297 mSDsluCounter, 723 mSDsCounter, 0 mSdLazyCounter, 1721 mSolverCounterSat, 288 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 792 SdHoareTripleChecker+Invalid, 2009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 288 IncrementalHoareTripleChecker+Valid, 1721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2023-02-17 01:46:20,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 792 Invalid, 2009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [288 Valid, 1721 Invalid, 0 Unknown, 0 Unchecked, 8.4s Time] [2023-02-17 01:46:20,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2818 states. [2023-02-17 01:46:20,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2818 to 2301. [2023-02-17 01:46:20,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2301 states, 1654 states have (on average 1.3035066505441355) internal successors, (2156), 1698 states have internal predecessors, (2156), 524 states have call successors, (524), 123 states have call predecessors, (524), 122 states have return successors, (516), 479 states have call predecessors, (516), 516 states have call successors, (516) [2023-02-17 01:46:20,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2301 states to 2301 states and 3196 transitions. [2023-02-17 01:46:20,704 INFO L78 Accepts]: Start accepts. Automaton has 2301 states and 3196 transitions. Word has length 66 [2023-02-17 01:46:20,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:46:20,704 INFO L495 AbstractCegarLoop]: Abstraction has 2301 states and 3196 transitions. [2023-02-17 01:46:20,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 19 states have internal predecessors, (76), 6 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2023-02-17 01:46:20,704 INFO L276 IsEmpty]: Start isEmpty. Operand 2301 states and 3196 transitions. [2023-02-17 01:46:20,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-02-17 01:46:20,708 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:46:20,708 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:46:20,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-02-17 01:46:20,911 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 [2023-02-17 01:46:20,912 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:46:20,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:46:20,912 INFO L85 PathProgramCache]: Analyzing trace with hash -191939833, now seen corresponding path program 1 times [2023-02-17 01:46:20,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:46:20,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517294245] [2023-02-17 01:46:20,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:46:20,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:46:20,917 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:46:20,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1882273522] [2023-02-17 01:46:20,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:46:20,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:46:20,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:46:20,919 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) [2023-02-17 01:46:20,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-02-17 01:46:20,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:46:20,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 57 conjunts are in the unsatisfiable core [2023-02-17 01:46:20,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:46:21,085 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2023-02-17 01:46:21,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:46:21,447 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2023-02-17 01:46:21,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:46:21,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517294245] [2023-02-17 01:46:21,447 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:46:21,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882273522] [2023-02-17 01:46:21,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882273522] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:46:21,448 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 01:46:21,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 25 [2023-02-17 01:46:21,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960808526] [2023-02-17 01:46:21,448 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 01:46:21,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-17 01:46:21,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:46:21,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-17 01:46:21,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2023-02-17 01:46:21,449 INFO L87 Difference]: Start difference. First operand 2301 states and 3196 transitions. Second operand has 25 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 8 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2023-02-17 01:46:34,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:46:34,911 INFO L93 Difference]: Finished difference Result 2723 states and 3749 transitions. [2023-02-17 01:46:34,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-02-17 01:46:34,913 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 8 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 77 [2023-02-17 01:46:34,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:46:34,920 INFO L225 Difference]: With dead ends: 2723 [2023-02-17 01:46:34,920 INFO L226 Difference]: Without dead ends: 2702 [2023-02-17 01:46:34,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1877 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1242, Invalid=5238, Unknown=0, NotChecked=0, Total=6480 [2023-02-17 01:46:34,922 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 361 mSDsluCounter, 936 mSDsCounter, 0 mSdLazyCounter, 1738 mSolverCounterSat, 397 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 1043 SdHoareTripleChecker+Invalid, 2135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 397 IncrementalHoareTripleChecker+Valid, 1738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2023-02-17 01:46:34,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [361 Valid, 1043 Invalid, 2135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [397 Valid, 1738 Invalid, 0 Unknown, 0 Unchecked, 9.2s Time] [2023-02-17 01:46:34,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2702 states. [2023-02-17 01:46:35,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2702 to 2457. [2023-02-17 01:46:35,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2457 states, 1754 states have (on average 1.298175598631699) internal successors, (2277), 1801 states have internal predecessors, (2277), 565 states have call successors, (565), 137 states have call predecessors, (565), 137 states have return successors, (559), 518 states have call predecessors, (559), 559 states have call successors, (559) [2023-02-17 01:46:35,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2457 states to 2457 states and 3401 transitions. [2023-02-17 01:46:35,740 INFO L78 Accepts]: Start accepts. Automaton has 2457 states and 3401 transitions. Word has length 77 [2023-02-17 01:46:35,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:46:35,740 INFO L495 AbstractCegarLoop]: Abstraction has 2457 states and 3401 transitions. [2023-02-17 01:46:35,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 8 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2023-02-17 01:46:35,740 INFO L276 IsEmpty]: Start isEmpty. Operand 2457 states and 3401 transitions. [2023-02-17 01:46:35,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-02-17 01:46:35,741 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:46:35,741 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:46:35,751 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-02-17 01:46:35,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:46:35,946 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:46:35,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:46:35,946 INFO L85 PathProgramCache]: Analyzing trace with hash -558295812, now seen corresponding path program 1 times [2023-02-17 01:46:35,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:46:35,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837605625] [2023-02-17 01:46:35,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:46:35,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:46:35,951 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:46:35,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1075532446] [2023-02-17 01:46:35,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:46:35,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:46:35,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:46:35,954 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 01:46:35,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-02-17 01:46:36,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:46:36,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 37 conjunts are in the unsatisfiable core [2023-02-17 01:46:36,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:46:36,081 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 20 proven. 32 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2023-02-17 01:46:36,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:46:36,351 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 29 proven. 17 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2023-02-17 01:46:36,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:46:36,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837605625] [2023-02-17 01:46:36,351 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:46:36,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075532446] [2023-02-17 01:46:36,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075532446] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:46:36,352 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 01:46:36,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10] total 24 [2023-02-17 01:46:36,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448429323] [2023-02-17 01:46:36,352 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 01:46:36,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-17 01:46:36,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:46:36,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-17 01:46:36,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2023-02-17 01:46:36,353 INFO L87 Difference]: Start difference. First operand 2457 states and 3401 transitions. Second operand has 24 states, 24 states have (on average 2.75) internal successors, (66), 21 states have internal predecessors, (66), 8 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) [2023-02-17 01:46:41,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:46:41,052 INFO L93 Difference]: Finished difference Result 3812 states and 5553 transitions. [2023-02-17 01:46:41,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-02-17 01:46:41,052 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 21 states have internal predecessors, (66), 8 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 92 [2023-02-17 01:46:41,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:46:41,063 INFO L225 Difference]: With dead ends: 3812 [2023-02-17 01:46:41,063 INFO L226 Difference]: Without dead ends: 3808 [2023-02-17 01:46:41,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1998 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1332, Invalid=4988, Unknown=0, NotChecked=0, Total=6320 [2023-02-17 01:46:41,065 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 439 mSDsluCounter, 1199 mSDsCounter, 0 mSdLazyCounter, 1588 mSolverCounterSat, 569 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 1358 SdHoareTripleChecker+Invalid, 2157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 569 IncrementalHoareTripleChecker+Valid, 1588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-02-17 01:46:41,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [443 Valid, 1358 Invalid, 2157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [569 Valid, 1588 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-02-17 01:46:41,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3808 states. [2023-02-17 01:46:42,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3808 to 3254. [2023-02-17 01:46:42,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3254 states, 2169 states have (on average 1.338865836791148) internal successors, (2904), 2237 states have internal predecessors, (2904), 932 states have call successors, (932), 153 states have call predecessors, (932), 152 states have return successors, (926), 863 states have call predecessors, (926), 926 states have call successors, (926) [2023-02-17 01:46:42,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3254 states to 3254 states and 4762 transitions. [2023-02-17 01:46:42,432 INFO L78 Accepts]: Start accepts. Automaton has 3254 states and 4762 transitions. Word has length 92 [2023-02-17 01:46:42,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:46:42,432 INFO L495 AbstractCegarLoop]: Abstraction has 3254 states and 4762 transitions. [2023-02-17 01:46:42,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 21 states have internal predecessors, (66), 8 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) [2023-02-17 01:46:42,432 INFO L276 IsEmpty]: Start isEmpty. Operand 3254 states and 4762 transitions. [2023-02-17 01:46:42,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-02-17 01:46:42,434 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:46:42,434 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:46:42,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-02-17 01:46:42,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:46:42,644 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:46:42,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:46:42,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1736118861, now seen corresponding path program 2 times [2023-02-17 01:46:42,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:46:42,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966589387] [2023-02-17 01:46:42,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:46:42,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:46:42,650 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:46:42,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1964573002] [2023-02-17 01:46:42,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 01:46:42,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:46:42,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:46:42,652 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 01:46:42,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-02-17 01:46:42,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 01:46:42,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 01:46:42,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 80 conjunts are in the unsatisfiable core [2023-02-17 01:46:42,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:46:42,885 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 44 proven. 44 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2023-02-17 01:46:42,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:46:43,665 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 44 proven. 41 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2023-02-17 01:46:43,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:46:43,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966589387] [2023-02-17 01:46:43,666 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:46:43,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964573002] [2023-02-17 01:46:43,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964573002] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:46:43,666 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 01:46:43,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 33 [2023-02-17 01:46:43,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666689081] [2023-02-17 01:46:43,667 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 01:46:43,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-17 01:46:43,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:46:43,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-17 01:46:43,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2023-02-17 01:46:43,668 INFO L87 Difference]: Start difference. First operand 3254 states and 4762 transitions. Second operand has 33 states, 31 states have (on average 2.806451612903226) internal successors, (87), 29 states have internal predecessors, (87), 9 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) [2023-02-17 01:46:52,624 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 [] [2023-02-17 01:47:04,598 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 01:47:10,393 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 01:47:17,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:47:17,247 INFO L93 Difference]: Finished difference Result 4409 states and 6343 transitions. [2023-02-17 01:47:17,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-02-17 01:47:17,247 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 2.806451612903226) internal successors, (87), 29 states have internal predecessors, (87), 9 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) Word has length 94 [2023-02-17 01:47:17,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:47:17,261 INFO L225 Difference]: With dead ends: 4409 [2023-02-17 01:47:17,261 INFO L226 Difference]: Without dead ends: 4403 [2023-02-17 01:47:17,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2921 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=1949, Invalid=6980, Unknown=1, NotChecked=0, Total=8930 [2023-02-17 01:47:17,265 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 653 mSDsluCounter, 868 mSDsCounter, 0 mSdLazyCounter, 2401 mSolverCounterSat, 592 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 653 SdHoareTripleChecker+Valid, 947 SdHoareTripleChecker+Invalid, 2995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 592 IncrementalHoareTripleChecker+Valid, 2401 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.3s IncrementalHoareTripleChecker+Time [2023-02-17 01:47:17,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [653 Valid, 947 Invalid, 2995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [592 Valid, 2401 Invalid, 2 Unknown, 0 Unchecked, 21.3s Time] [2023-02-17 01:47:17,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4403 states. [2023-02-17 01:47:19,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4403 to 3976. [2023-02-17 01:47:19,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3976 states, 2778 states have (on average 1.3416126709863212) internal successors, (3727), 2860 states have internal predecessors, (3727), 1006 states have call successors, (1006), 192 states have call predecessors, (1006), 191 states have return successors, (1002), 923 states have call predecessors, (1002), 1002 states have call successors, (1002) [2023-02-17 01:47:19,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3976 states to 3976 states and 5735 transitions. [2023-02-17 01:47:19,097 INFO L78 Accepts]: Start accepts. Automaton has 3976 states and 5735 transitions. Word has length 94 [2023-02-17 01:47:19,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:47:19,098 INFO L495 AbstractCegarLoop]: Abstraction has 3976 states and 5735 transitions. [2023-02-17 01:47:19,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 2.806451612903226) internal successors, (87), 29 states have internal predecessors, (87), 9 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) [2023-02-17 01:47:19,098 INFO L276 IsEmpty]: Start isEmpty. Operand 3976 states and 5735 transitions. [2023-02-17 01:47:19,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-02-17 01:47:19,099 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:47:19,099 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:47:19,106 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-02-17 01:47:19,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:47:19,304 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:47:19,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:47:19,304 INFO L85 PathProgramCache]: Analyzing trace with hash 348816342, now seen corresponding path program 1 times [2023-02-17 01:47:19,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:47:19,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749239271] [2023-02-17 01:47:19,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:47:19,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:47:19,309 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:47:19,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1383637258] [2023-02-17 01:47:19,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:47:19,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:47:19,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:47:19,311 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 01:47:19,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-02-17 01:47:19,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:47:19,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 21 conjunts are in the unsatisfiable core [2023-02-17 01:47:19,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:47:19,411 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 27 proven. 108 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-02-17 01:47:19,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:47:19,523 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 27 proven. 44 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2023-02-17 01:47:19,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:47:19,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749239271] [2023-02-17 01:47:19,523 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:47:19,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383637258] [2023-02-17 01:47:19,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383637258] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:47:19,523 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 01:47:19,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 24 [2023-02-17 01:47:19,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449624485] [2023-02-17 01:47:19,523 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 01:47:19,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-17 01:47:19,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:47:19,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-17 01:47:19,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2023-02-17 01:47:19,524 INFO L87 Difference]: Start difference. First operand 3976 states and 5735 transitions. Second operand has 24 states, 24 states have (on average 3.9166666666666665) internal successors, (94), 24 states have internal predecessors, (94), 7 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2023-02-17 01:47:24,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:47:24,416 INFO L93 Difference]: Finished difference Result 10340 states and 15763 transitions. [2023-02-17 01:47:24,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-02-17 01:47:24,416 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.9166666666666665) internal successors, (94), 24 states have internal predecessors, (94), 7 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 94 [2023-02-17 01:47:24,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:47:24,442 INFO L225 Difference]: With dead ends: 10340 [2023-02-17 01:47:24,447 INFO L226 Difference]: Without dead ends: 8964 [2023-02-17 01:47:24,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=585, Invalid=1055, Unknown=0, NotChecked=0, Total=1640 [2023-02-17 01:47:24,452 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 478 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 694 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-17 01:47:24,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [478 Valid, 694 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-17 01:47:24,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8964 states. [2023-02-17 01:47:28,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8964 to 8481. [2023-02-17 01:47:28,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8481 states, 5490 states have (on average 1.346448087431694) internal successors, (7392), 5571 states have internal predecessors, (7392), 2652 states have call successors, (2652), 339 states have call predecessors, (2652), 338 states have return successors, (2642), 2570 states have call predecessors, (2642), 2642 states have call successors, (2642) [2023-02-17 01:47:29,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8481 states to 8481 states and 12686 transitions. [2023-02-17 01:47:29,016 INFO L78 Accepts]: Start accepts. Automaton has 8481 states and 12686 transitions. Word has length 94 [2023-02-17 01:47:29,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:47:29,016 INFO L495 AbstractCegarLoop]: Abstraction has 8481 states and 12686 transitions. [2023-02-17 01:47:29,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.9166666666666665) internal successors, (94), 24 states have internal predecessors, (94), 7 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2023-02-17 01:47:29,017 INFO L276 IsEmpty]: Start isEmpty. Operand 8481 states and 12686 transitions. [2023-02-17 01:47:29,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-02-17 01:47:29,018 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:47:29,018 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:47:29,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-02-17 01:47:29,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-02-17 01:47:29,223 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:47:29,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:47:29,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1461558211, now seen corresponding path program 2 times [2023-02-17 01:47:29,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:47:29,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66003968] [2023-02-17 01:47:29,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:47:29,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:47:29,230 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:47:29,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2089276991] [2023-02-17 01:47:29,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 01:47:29,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:47:29,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:47:29,232 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 01:47:29,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-02-17 01:47:29,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 01:47:29,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 01:47:29,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-17 01:47:29,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:47:29,313 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2023-02-17 01:47:29,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:47:29,352 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2023-02-17 01:47:29,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:47:29,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66003968] [2023-02-17 01:47:29,353 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:47:29,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089276991] [2023-02-17 01:47:29,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089276991] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:47:29,353 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 01:47:29,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2023-02-17 01:47:29,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195424592] [2023-02-17 01:47:29,354 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 01:47:29,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-17 01:47:29,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:47:29,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-17 01:47:29,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-02-17 01:47:29,355 INFO L87 Difference]: Start difference. First operand 8481 states and 12686 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-02-17 01:47:35,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:47:35,525 INFO L93 Difference]: Finished difference Result 11745 states and 17757 transitions. [2023-02-17 01:47:35,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-02-17 01:47:35,526 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 95 [2023-02-17 01:47:35,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:47:35,550 INFO L225 Difference]: With dead ends: 11745 [2023-02-17 01:47:35,550 INFO L226 Difference]: Without dead ends: 11171 [2023-02-17 01:47:35,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 188 SyntacticMatches, 6 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=365, Invalid=1357, Unknown=0, NotChecked=0, Total=1722 [2023-02-17 01:47:35,554 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 235 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-17 01:47:35,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 538 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 640 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-17 01:47:35,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11171 states. [2023-02-17 01:47:40,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11171 to 8661. [2023-02-17 01:47:40,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8661 states, 5649 states have (on average 1.3423614799079484) internal successors, (7583), 5731 states have internal predecessors, (7583), 2673 states have call successors, (2673), 339 states have call predecessors, (2673), 338 states have return successors, (2663), 2590 states have call predecessors, (2663), 2663 states have call successors, (2663) [2023-02-17 01:47:40,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8661 states to 8661 states and 12919 transitions. [2023-02-17 01:47:40,140 INFO L78 Accepts]: Start accepts. Automaton has 8661 states and 12919 transitions. Word has length 95 [2023-02-17 01:47:40,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:47:40,141 INFO L495 AbstractCegarLoop]: Abstraction has 8661 states and 12919 transitions. [2023-02-17 01:47:40,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-02-17 01:47:40,141 INFO L276 IsEmpty]: Start isEmpty. Operand 8661 states and 12919 transitions. [2023-02-17 01:47:40,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-02-17 01:47:40,143 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:47:40,143 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:47:40,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-02-17 01:47:40,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-02-17 01:47:40,348 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:47:40,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:47:40,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1771605345, now seen corresponding path program 2 times [2023-02-17 01:47:40,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:47:40,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570748044] [2023-02-17 01:47:40,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:47:40,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:47:40,356 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:47:40,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1404065876] [2023-02-17 01:47:40,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 01:47:40,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:47:40,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:47:40,358 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 01:47:40,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-02-17 01:47:40,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 01:47:40,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 01:47:40,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 84 conjunts are in the unsatisfiable core [2023-02-17 01:47:40,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:47:40,606 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 53 proven. 47 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2023-02-17 01:47:40,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:47:46,547 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 50 proven. 47 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-02-17 01:47:46,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:47:46,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570748044] [2023-02-17 01:47:46,547 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:47:46,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404065876] [2023-02-17 01:47:46,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404065876] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:47:46,547 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 01:47:46,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 34 [2023-02-17 01:47:46,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343413864] [2023-02-17 01:47:46,547 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 01:47:46,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-17 01:47:46,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:47:46,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-17 01:47:46,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=966, Unknown=0, NotChecked=0, Total=1122 [2023-02-17 01:47:46,549 INFO L87 Difference]: Start difference. First operand 8661 states and 12919 transitions. Second operand has 34 states, 32 states have (on average 2.59375) internal successors, (83), 32 states have internal predecessors, (83), 10 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (27), 9 states have call predecessors, (27), 8 states have call successors, (27) [2023-02-17 01:48:08,290 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 01:48:29,882 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 01:48:33,281 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 01:48:50,177 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 01:48:53,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:48:53,658 INFO L93 Difference]: Finished difference Result 11686 states and 17088 transitions. [2023-02-17 01:48:53,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2023-02-17 01:48:53,658 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 2.59375) internal successors, (83), 32 states have internal predecessors, (83), 10 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (27), 9 states have call predecessors, (27), 8 states have call successors, (27) Word has length 107 [2023-02-17 01:48:53,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:48:53,686 INFO L225 Difference]: With dead ends: 11686 [2023-02-17 01:48:53,686 INFO L226 Difference]: Without dead ends: 11635 [2023-02-17 01:48:53,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 178 SyntacticMatches, 2 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4599 ImplicationChecksByTransitivity, 28.5s TimeCoverageRelationStatistics Valid=2715, Invalid=11327, Unknown=0, NotChecked=0, Total=14042 [2023-02-17 01:48:53,693 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 680 mSDsluCounter, 1403 mSDsCounter, 0 mSdLazyCounter, 3877 mSolverCounterSat, 830 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 680 SdHoareTripleChecker+Valid, 1513 SdHoareTripleChecker+Invalid, 4709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 830 IncrementalHoareTripleChecker+Valid, 3877 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.6s IncrementalHoareTripleChecker+Time [2023-02-17 01:48:53,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [680 Valid, 1513 Invalid, 4709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [830 Valid, 3877 Invalid, 2 Unknown, 0 Unchecked, 36.6s Time] [2023-02-17 01:48:53,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11635 states. [2023-02-17 01:49:00,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11635 to 10322. [2023-02-17 01:49:00,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10322 states, 6896 states have (on average 1.3401972157772621) internal successors, (9242), 6992 states have internal predecessors, (9242), 3024 states have call successors, (3024), 402 states have call predecessors, (3024), 401 states have return successors, (3014), 2927 states have call predecessors, (3014), 3014 states have call successors, (3014) [2023-02-17 01:49:00,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10322 states to 10322 states and 15280 transitions. [2023-02-17 01:49:00,924 INFO L78 Accepts]: Start accepts. Automaton has 10322 states and 15280 transitions. Word has length 107 [2023-02-17 01:49:00,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:49:00,924 INFO L495 AbstractCegarLoop]: Abstraction has 10322 states and 15280 transitions. [2023-02-17 01:49:00,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 2.59375) internal successors, (83), 32 states have internal predecessors, (83), 10 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (27), 9 states have call predecessors, (27), 8 states have call successors, (27) [2023-02-17 01:49:00,925 INFO L276 IsEmpty]: Start isEmpty. Operand 10322 states and 15280 transitions. [2023-02-17 01:49:00,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-02-17 01:49:00,926 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:49:00,927 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 7, 7, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:49:00,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-02-17 01:49:01,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-02-17 01:49:01,132 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:49:01,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:49:01,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1018938325, now seen corresponding path program 1 times [2023-02-17 01:49:01,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:49:01,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518497360] [2023-02-17 01:49:01,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:49:01,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:49:01,138 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:49:01,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1640463369] [2023-02-17 01:49:01,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:49:01,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:49:01,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:49:01,140 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 01:49:01,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-02-17 01:49:01,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:49:01,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-17 01:49:01,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:49:01,255 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 67 proven. 116 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-02-17 01:49:01,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:49:01,381 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 67 proven. 52 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2023-02-17 01:49:01,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:49:01,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518497360] [2023-02-17 01:49:01,382 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:49:01,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640463369] [2023-02-17 01:49:01,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640463369] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:49:01,382 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 01:49:01,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2023-02-17 01:49:01,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366090422] [2023-02-17 01:49:01,382 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 01:49:01,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-17 01:49:01,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:49:01,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-17 01:49:01,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2023-02-17 01:49:01,383 INFO L87 Difference]: Start difference. First operand 10322 states and 15280 transitions. Second operand has 24 states, 24 states have (on average 4.458333333333333) internal successors, (107), 24 states have internal predecessors, (107), 7 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2023-02-17 01:49:08,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:49:08,390 INFO L93 Difference]: Finished difference Result 16273 states and 24213 transitions. [2023-02-17 01:49:08,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-02-17 01:49:08,390 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.458333333333333) internal successors, (107), 24 states have internal predecessors, (107), 7 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 106 [2023-02-17 01:49:08,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:49:08,415 INFO L225 Difference]: With dead ends: 16273 [2023-02-17 01:49:08,415 INFO L226 Difference]: Without dead ends: 9382 [2023-02-17 01:49:08,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 186 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=585, Invalid=1055, Unknown=0, NotChecked=0, Total=1640 [2023-02-17 01:49:08,430 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 406 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-17 01:49:08,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [406 Valid, 556 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-17 01:49:08,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9382 states. [2023-02-17 01:49:15,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9382 to 9306. [2023-02-17 01:49:15,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9306 states, 6130 states have (on average 1.2507340946166394) internal successors, (7667), 6172 states have internal predecessors, (7667), 2779 states have call successors, (2779), 397 states have call predecessors, (2779), 396 states have return successors, (2769), 2736 states have call predecessors, (2769), 2769 states have call successors, (2769) [2023-02-17 01:49:15,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9306 states to 9306 states and 13215 transitions. [2023-02-17 01:49:15,057 INFO L78 Accepts]: Start accepts. Automaton has 9306 states and 13215 transitions. Word has length 106 [2023-02-17 01:49:15,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:49:15,058 INFO L495 AbstractCegarLoop]: Abstraction has 9306 states and 13215 transitions. [2023-02-17 01:49:15,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.458333333333333) internal successors, (107), 24 states have internal predecessors, (107), 7 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2023-02-17 01:49:15,058 INFO L276 IsEmpty]: Start isEmpty. Operand 9306 states and 13215 transitions. [2023-02-17 01:49:15,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-02-17 01:49:15,060 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:49:15,060 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:49:15,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-02-17 01:49:15,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-02-17 01:49:15,265 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:49:15,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:49:15,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1083254017, now seen corresponding path program 3 times [2023-02-17 01:49:15,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:49:15,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673231578] [2023-02-17 01:49:15,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:49:15,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:49:15,275 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:49:15,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1140466997] [2023-02-17 01:49:15,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 01:49:15,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:49:15,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:49:15,277 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 01:49:15,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-02-17 01:49:15,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-17 01:49:15,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 01:49:15,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 85 conjunts are in the unsatisfiable core [2023-02-17 01:49:15,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:49:15,591 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 24 proven. 53 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2023-02-17 01:49:15,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:49:18,052 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 24 proven. 50 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2023-02-17 01:49:18,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:49:18,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673231578] [2023-02-17 01:49:18,053 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:49:18,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140466997] [2023-02-17 01:49:18,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140466997] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:49:18,053 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 01:49:18,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17] total 36 [2023-02-17 01:49:18,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248356416] [2023-02-17 01:49:18,053 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 01:49:18,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-02-17 01:49:18,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:49:18,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-02-17 01:49:18,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1067, Unknown=0, NotChecked=0, Total=1260 [2023-02-17 01:49:18,055 INFO L87 Difference]: Start difference. First operand 9306 states and 13215 transitions. Second operand has 36 states, 33 states have (on average 2.6363636363636362) internal successors, (87), 33 states have internal predecessors, (87), 11 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (28), 8 states have call predecessors, (28), 9 states have call successors, (28) [2023-02-17 01:49:29,383 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []