./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e8d55036 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/fermat1-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 2dec1b2e3c1461164aa09bac8cca047a14ba0fda75d53737804411255b62653a --- Real Ultimate output --- This is Ultimate 0.2.2-?-e8d5503-m [2023-02-15 20:48:23,525 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 20:48:23,527 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 20:48:23,559 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 20:48:23,560 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 20:48:23,562 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 20:48:23,563 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 20:48:23,565 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 20:48:23,567 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 20:48:23,569 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 20:48:23,570 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 20:48:23,571 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 20:48:23,571 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 20:48:23,575 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 20:48:23,575 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 20:48:23,577 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 20:48:23,577 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 20:48:23,578 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 20:48:23,580 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 20:48:23,580 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 20:48:23,582 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 20:48:23,584 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 20:48:23,585 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 20:48:23,586 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 20:48:23,587 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 20:48:23,592 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 20:48:23,593 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 20:48:23,593 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 20:48:23,594 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 20:48:23,595 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 20:48:23,595 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 20:48:23,595 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 20:48:23,596 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 20:48:23,597 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 20:48:23,597 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 20:48:23,597 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 20:48:23,598 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 20:48:23,598 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 20:48:23,598 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 20:48:23,599 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 20:48:23,600 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 20:48:23,600 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 20:48:23,624 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 20:48:23,625 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 20:48:23,625 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 20:48:23,625 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 20:48:23,626 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 20:48:23,626 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 20:48:23,626 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 20:48:23,627 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 20:48:23,627 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 20:48:23,627 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 20:48:23,628 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 20:48:23,628 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 20:48:23,628 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 20:48:23,628 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 20:48:23,628 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 20:48:23,628 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 20:48:23,628 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 20:48:23,628 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 20:48:23,629 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 20:48:23,629 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 20:48:23,629 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 20:48:23,629 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 20:48:23,629 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 20:48:23,629 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 20:48:23,629 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 20:48:23,630 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 20:48:23,630 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 20:48:23,630 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 20:48:23,630 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 20:48:23,630 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 20:48:23,631 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 20:48:23,631 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 20:48:23,631 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 20:48:23,631 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 20:48:23,631 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 20:48:23,631 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2dec1b2e3c1461164aa09bac8cca047a14ba0fda75d53737804411255b62653a [2023-02-15 20:48:23,799 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 20:48:23,826 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 20:48:23,828 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 20:48:23,829 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 20:48:23,829 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 20:48:23,830 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound20.c [2023-02-15 20:48:24,761 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 20:48:24,956 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 20:48:24,957 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound20.c [2023-02-15 20:48:24,960 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/039159bf1/7c931f56222447b3ba999b84cc0f515b/FLAGa36af3202 [2023-02-15 20:48:24,969 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/039159bf1/7c931f56222447b3ba999b84cc0f515b [2023-02-15 20:48:24,970 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 20:48:24,971 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 20:48:24,972 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 20:48:24,972 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 20:48:24,974 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 20:48:24,974 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 08:48:24" (1/1) ... [2023-02-15 20:48:24,975 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60c4e72a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:48:24, skipping insertion in model container [2023-02-15 20:48:24,975 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 08:48:24" (1/1) ... [2023-02-15 20:48:24,979 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 20:48:24,988 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 20:48:25,066 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/fermat1-ll_unwindbound20.c[535,548] [2023-02-15 20:48:25,078 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 20:48:25,084 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 20:48:25,091 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/fermat1-ll_unwindbound20.c[535,548] [2023-02-15 20:48:25,103 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 20:48:25,114 INFO L208 MainTranslator]: Completed translation [2023-02-15 20:48:25,115 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:48:25 WrapperNode [2023-02-15 20:48:25,115 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 20:48:25,115 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 20:48:25,115 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 20:48:25,115 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 20:48:25,119 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:48:25" (1/1) ... [2023-02-15 20:48:25,123 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:48:25" (1/1) ... [2023-02-15 20:48:25,134 INFO L138 Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2023-02-15 20:48:25,134 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 20:48:25,135 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 20:48:25,135 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 20:48:25,135 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 20:48:25,141 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:48:25" (1/1) ... [2023-02-15 20:48:25,141 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:48:25" (1/1) ... [2023-02-15 20:48:25,142 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:48:25" (1/1) ... [2023-02-15 20:48:25,142 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:48:25" (1/1) ... [2023-02-15 20:48:25,144 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:48:25" (1/1) ... [2023-02-15 20:48:25,147 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:48:25" (1/1) ... [2023-02-15 20:48:25,147 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:48:25" (1/1) ... [2023-02-15 20:48:25,148 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:48:25" (1/1) ... [2023-02-15 20:48:25,149 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 20:48:25,149 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 20:48:25,150 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 20:48:25,150 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 20:48:25,150 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:48:25" (1/1) ... [2023-02-15 20:48:25,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 20:48:25,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:48:25,173 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) [2023-02-15 20:48:25,179 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 [2023-02-15 20:48:25,197 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 20:48:25,198 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-15 20:48:25,198 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-15 20:48:25,198 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 20:48:25,198 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 20:48:25,199 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 20:48:25,199 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-15 20:48:25,199 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-15 20:48:25,240 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 20:48:25,241 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 20:48:25,346 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 20:48:25,368 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 20:48:25,369 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-15 20:48:25,370 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 08:48:25 BoogieIcfgContainer [2023-02-15 20:48:25,370 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 20:48:25,372 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 20:48:25,372 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 20:48:25,374 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 20:48:25,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 08:48:24" (1/3) ... [2023-02-15 20:48:25,374 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@555367ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 08:48:25, skipping insertion in model container [2023-02-15 20:48:25,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:48:25" (2/3) ... [2023-02-15 20:48:25,375 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@555367ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 08:48:25, skipping insertion in model container [2023-02-15 20:48:25,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 08:48:25" (3/3) ... [2023-02-15 20:48:25,376 INFO L112 eAbstractionObserver]: Analyzing ICFG fermat1-ll_unwindbound20.c [2023-02-15 20:48:25,391 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 20:48:25,392 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 20:48:25,435 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 20:48:25,440 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;@7c4e1cdd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 20:48:25,441 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 20:48:25,443 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 20:48:25,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-15 20:48:25,452 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:48:25,452 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:48:25,457 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:48:25,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:48:25,461 INFO L85 PathProgramCache]: Analyzing trace with hash 738208203, now seen corresponding path program 1 times [2023-02-15 20:48:25,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:48:25,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707873227] [2023-02-15 20:48:25,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:48:25,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:48:25,540 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:48:25,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [325399384] [2023-02-15 20:48:25,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:48:25,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:48:25,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:48:25,543 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) [2023-02-15 20:48:25,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 20:48:25,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:48:25,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-15 20:48:25,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:48:25,628 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 20:48:25,628 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 20:48:25,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:48:25,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707873227] [2023-02-15 20:48:25,629 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:48:25,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325399384] [2023-02-15 20:48:25,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325399384] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 20:48:25,631 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 20:48:25,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 20:48:25,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165929208] [2023-02-15 20:48:25,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 20:48:25,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 20:48:25,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:48:25,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 20:48:25,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 20:48:25,675 INFO L87 Difference]: Start difference. First operand has 32 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) 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) [2023-02-15 20:48:25,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:48:25,698 INFO L93 Difference]: Finished difference Result 61 states and 94 transitions. [2023-02-15 20:48:25,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 20:48:25,700 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 [2023-02-15 20:48:25,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:48:25,705 INFO L225 Difference]: With dead ends: 61 [2023-02-15 20:48:25,705 INFO L226 Difference]: Without dead ends: 28 [2023-02-15 20:48:25,709 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 [2023-02-15 20:48:25,712 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:48:25,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:48:25,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-02-15 20:48:25,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-02-15 20:48:25,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 20:48:25,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2023-02-15 20:48:25,750 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 18 [2023-02-15 20:48:25,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:48:25,750 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2023-02-15 20:48:25,751 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) [2023-02-15 20:48:25,751 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2023-02-15 20:48:25,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-15 20:48:25,752 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:48:25,752 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:48:25,762 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-15 20:48:25,956 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 [2023-02-15 20:48:25,957 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:48:25,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:48:25,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1770759922, now seen corresponding path program 1 times [2023-02-15 20:48:25,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:48:25,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621638369] [2023-02-15 20:48:25,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:48:25,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:48:25,978 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:48:25,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1393965371] [2023-02-15 20:48:25,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:48:25,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:48:25,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:48:25,980 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) [2023-02-15 20:48:25,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 20:48:26,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:48:26,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-15 20:48:26,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:48:26,100 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 20:48:26,100 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 20:48:26,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:48:26,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621638369] [2023-02-15 20:48:26,101 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:48:26,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393965371] [2023-02-15 20:48:26,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393965371] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 20:48:26,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 20:48:26,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 20:48:26,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954824384] [2023-02-15 20:48:26,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 20:48:26,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 20:48:26,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:48:26,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 20:48:26,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 20:48:26,106 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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) [2023-02-15 20:48:26,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:48:26,130 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2023-02-15 20:48:26,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 20:48:26,130 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 [2023-02-15 20:48:26,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:48:26,131 INFO L225 Difference]: With dead ends: 37 [2023-02-15 20:48:26,132 INFO L226 Difference]: Without dead ends: 30 [2023-02-15 20:48:26,132 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 [2023-02-15 20:48:26,133 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 0 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 91 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 [2023-02-15 20:48:26,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 91 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:48:26,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-02-15 20:48:26,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-02-15 20:48:26,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 22 states have internal predecessors, (28), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 20:48:26,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2023-02-15 20:48:26,142 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 19 [2023-02-15 20:48:26,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:48:26,143 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2023-02-15 20:48:26,143 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) [2023-02-15 20:48:26,143 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2023-02-15 20:48:26,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-15 20:48:26,144 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:48:26,144 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:48:26,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 20:48:26,357 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 [2023-02-15 20:48:26,358 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:48:26,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:48:26,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1769091626, now seen corresponding path program 1 times [2023-02-15 20:48:26,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:48:26,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708498095] [2023-02-15 20:48:26,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:48:26,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:48:26,372 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:48:26,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [840009434] [2023-02-15 20:48:26,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:48:26,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:48:26,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:48:26,390 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) [2023-02-15 20:48:26,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 20:48:26,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:48:26,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-15 20:48:26,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:48:26,539 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 20:48:26,540 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 20:48:26,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:48:26,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708498095] [2023-02-15 20:48:26,541 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:48:26,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840009434] [2023-02-15 20:48:26,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840009434] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 20:48:26,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 20:48:26,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 20:48:26,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791419991] [2023-02-15 20:48:26,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 20:48:26,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 20:48:26,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:48:26,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 20:48:26,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 20:48:26,544 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (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) [2023-02-15 20:48:28,679 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 [] [2023-02-15 20:48:30,941 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 20:48:32,962 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 20:48:32,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:48:32,968 INFO L93 Difference]: Finished difference Result 49 states and 66 transitions. [2023-02-15 20:48:32,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 20:48:32,969 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (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 [2023-02-15 20:48:32,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:48:32,971 INFO L225 Difference]: With dead ends: 49 [2023-02-15 20:48:32,971 INFO L226 Difference]: Without dead ends: 47 [2023-02-15 20:48:32,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-15 20:48:32,972 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 16 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2023-02-15 20:48:32,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 103 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 2 Unknown, 0 Unchecked, 6.4s Time] [2023-02-15 20:48:32,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-02-15 20:48:32,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2023-02-15 20:48:32,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.393939393939394) internal successors, (46), 34 states have internal predecessors, (46), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-15 20:48:32,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2023-02-15 20:48:32,988 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 19 [2023-02-15 20:48:32,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:48:32,988 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2023-02-15 20:48:32,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (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) [2023-02-15 20:48:32,989 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2023-02-15 20:48:32,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-15 20:48:32,991 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:48:32,991 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] [2023-02-15 20:48:33,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 20:48:33,195 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 [2023-02-15 20:48:33,196 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:48:33,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:48:33,196 INFO L85 PathProgramCache]: Analyzing trace with hash -82041861, now seen corresponding path program 1 times [2023-02-15 20:48:33,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:48:33,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13134091] [2023-02-15 20:48:33,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:48:33,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:48:33,202 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:48:33,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1552364871] [2023-02-15 20:48:33,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:48:33,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:48:33,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:48:33,204 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) [2023-02-15 20:48:33,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 20:48:33,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:48:33,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-15 20:48:33,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:48:33,312 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 20:48:33,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:48:33,431 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 20:48:33,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:48:33,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13134091] [2023-02-15 20:48:33,432 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:48:33,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552364871] [2023-02-15 20:48:33,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552364871] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:48:33,432 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:48:33,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2023-02-15 20:48:33,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029939567] [2023-02-15 20:48:33,433 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:48:33,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-15 20:48:33,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:48:33,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-15 20:48:33,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-02-15 20:48:33,434 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand has 11 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 20:48:33,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:48:33,528 INFO L93 Difference]: Finished difference Result 53 states and 69 transitions. [2023-02-15 20:48:33,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 20:48:33,529 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 25 [2023-02-15 20:48:33,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:48:33,530 INFO L225 Difference]: With dead ends: 53 [2023-02-15 20:48:33,530 INFO L226 Difference]: Without dead ends: 48 [2023-02-15 20:48:33,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-02-15 20:48:33,531 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 28 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:48:33,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 139 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:48:33,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-02-15 20:48:33,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2023-02-15 20:48:33,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 35 states have internal predecessors, (45), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-15 20:48:33,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 62 transitions. [2023-02-15 20:48:33,542 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 62 transitions. Word has length 25 [2023-02-15 20:48:33,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:48:33,543 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 62 transitions. [2023-02-15 20:48:33,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 20:48:33,543 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 62 transitions. [2023-02-15 20:48:33,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-15 20:48:33,544 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:48:33,544 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, 1, 1, 1, 1] [2023-02-15 20:48:33,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-15 20:48:33,748 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 [2023-02-15 20:48:33,749 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:48:33,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:48:33,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1145481658, now seen corresponding path program 1 times [2023-02-15 20:48:33,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:48:33,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692339229] [2023-02-15 20:48:33,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:48:33,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:48:33,769 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:48:33,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [373074344] [2023-02-15 20:48:33,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:48:33,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:48:33,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:48:33,772 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) [2023-02-15 20:48:33,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 20:48:33,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:48:33,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-15 20:48:33,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:48:33,838 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 20:48:33,838 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 20:48:33,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:48:33,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692339229] [2023-02-15 20:48:33,838 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:48:33,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373074344] [2023-02-15 20:48:33,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373074344] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 20:48:33,839 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 20:48:33,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 20:48:33,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196038021] [2023-02-15 20:48:33,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 20:48:33,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 20:48:33,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:48:33,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 20:48:33,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-15 20:48:33,840 INFO L87 Difference]: Start difference. First operand 48 states and 62 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 20:48:33,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:48:33,862 INFO L93 Difference]: Finished difference Result 93 states and 121 transitions. [2023-02-15 20:48:33,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 20:48:33,862 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 3 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 31 [2023-02-15 20:48:33,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:48:33,863 INFO L225 Difference]: With dead ends: 93 [2023-02-15 20:48:33,863 INFO L226 Difference]: Without dead ends: 56 [2023-02-15 20:48:33,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-15 20:48:33,864 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:48:33,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 109 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:48:33,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-02-15 20:48:33,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2023-02-15 20:48:33,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 41 states have internal predecessors, (51), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-15 20:48:33,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2023-02-15 20:48:33,875 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 31 [2023-02-15 20:48:33,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:48:33,876 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2023-02-15 20:48:33,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 20:48:33,876 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2023-02-15 20:48:33,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-15 20:48:33,877 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:48:33,877 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-02-15 20:48:33,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-15 20:48:34,081 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 [2023-02-15 20:48:34,082 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:48:34,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:48:34,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1102972225, now seen corresponding path program 1 times [2023-02-15 20:48:34,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:48:34,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521971543] [2023-02-15 20:48:34,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:48:34,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:48:34,088 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:48:34,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [361768700] [2023-02-15 20:48:34,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:48:34,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:48:34,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:48:34,090 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) [2023-02-15 20:48:34,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 20:48:34,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:48:34,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 20:48:34,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:48:34,170 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 20:48:34,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:48:34,212 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 20:48:34,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:48:34,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521971543] [2023-02-15 20:48:34,213 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:48:34,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361768700] [2023-02-15 20:48:34,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361768700] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-15 20:48:34,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 20:48:34,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 10 [2023-02-15 20:48:34,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955113928] [2023-02-15 20:48:34,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 20:48:34,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 20:48:34,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:48:34,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 20:48:34,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-02-15 20:48:34,214 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-15 20:48:34,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:48:34,255 INFO L93 Difference]: Finished difference Result 102 states and 131 transitions. [2023-02-15 20:48:34,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 20:48:34,256 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 37 [2023-02-15 20:48:34,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:48:34,263 INFO L225 Difference]: With dead ends: 102 [2023-02-15 20:48:34,263 INFO L226 Difference]: Without dead ends: 65 [2023-02-15 20:48:34,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-02-15 20:48:34,265 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 14 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:48:34,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 129 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:48:34,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-02-15 20:48:34,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2023-02-15 20:48:34,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 47 states have internal predecessors, (58), 11 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-15 20:48:34,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 79 transitions. [2023-02-15 20:48:34,289 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 79 transitions. Word has length 37 [2023-02-15 20:48:34,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:48:34,290 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 79 transitions. [2023-02-15 20:48:34,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-15 20:48:34,290 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 79 transitions. [2023-02-15 20:48:34,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-15 20:48:34,295 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:48:34,295 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-02-15 20:48:34,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-15 20:48:34,500 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 [2023-02-15 20:48:34,500 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:48:34,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:48:34,501 INFO L85 PathProgramCache]: Analyzing trace with hash 30895492, now seen corresponding path program 1 times [2023-02-15 20:48:34,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:48:34,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846337661] [2023-02-15 20:48:34,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:48:34,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:48:34,506 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:48:34,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [61945439] [2023-02-15 20:48:34,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:48:34,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:48:34,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:48:34,508 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) [2023-02-15 20:48:34,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 20:48:34,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:48:34,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 20:48:34,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:48:34,586 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 20:48:34,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:48:34,637 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 20:48:34,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:48:34,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846337661] [2023-02-15 20:48:34,637 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:48:34,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61945439] [2023-02-15 20:48:34,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61945439] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:48:34,638 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:48:34,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2023-02-15 20:48:34,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910897958] [2023-02-15 20:48:34,638 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:48:34,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-15 20:48:34,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:48:34,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-15 20:48:34,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-02-15 20:48:34,639 INFO L87 Difference]: Start difference. First operand 64 states and 79 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 7 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2023-02-15 20:48:34,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:48:34,735 INFO L93 Difference]: Finished difference Result 170 states and 216 transitions. [2023-02-15 20:48:34,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-15 20:48:34,735 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 7 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 39 [2023-02-15 20:48:34,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:48:34,736 INFO L225 Difference]: With dead ends: 170 [2023-02-15 20:48:34,736 INFO L226 Difference]: Without dead ends: 133 [2023-02-15 20:48:34,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2023-02-15 20:48:34,737 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 52 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:48:34,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 212 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:48:34,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2023-02-15 20:48:34,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 119. [2023-02-15 20:48:34,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 88 states have (on average 1.2386363636363635) internal successors, (109), 89 states have internal predecessors, (109), 20 states have call successors, (20), 11 states have call predecessors, (20), 10 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2023-02-15 20:48:34,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 148 transitions. [2023-02-15 20:48:34,756 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 148 transitions. Word has length 39 [2023-02-15 20:48:34,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:48:34,756 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 148 transitions. [2023-02-15 20:48:34,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 7 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2023-02-15 20:48:34,757 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 148 transitions. [2023-02-15 20:48:34,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-15 20:48:34,757 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:48:34,757 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 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] [2023-02-15 20:48:34,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-15 20:48:34,962 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 [2023-02-15 20:48:34,963 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:48:34,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:48:34,963 INFO L85 PathProgramCache]: Analyzing trace with hash -798356602, now seen corresponding path program 1 times [2023-02-15 20:48:34,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:48:34,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791835548] [2023-02-15 20:48:34,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:48:34,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:48:34,976 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:48:34,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [950348826] [2023-02-15 20:48:34,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:48:34,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:48:34,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:48:34,979 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) [2023-02-15 20:48:34,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-15 20:48:35,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:48:35,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-15 20:48:35,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:48:35,041 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-15 20:48:35,041 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 20:48:35,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:48:35,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791835548] [2023-02-15 20:48:35,042 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:48:35,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950348826] [2023-02-15 20:48:35,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950348826] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 20:48:35,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 20:48:35,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 20:48:35,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347954209] [2023-02-15 20:48:35,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 20:48:35,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 20:48:35,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:48:35,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 20:48:35,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 20:48:35,043 INFO L87 Difference]: Start difference. First operand 119 states and 148 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-15 20:48:35,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:48:35,095 INFO L93 Difference]: Finished difference Result 174 states and 224 transitions. [2023-02-15 20:48:35,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 20:48:35,096 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 43 [2023-02-15 20:48:35,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:48:35,097 INFO L225 Difference]: With dead ends: 174 [2023-02-15 20:48:35,098 INFO L226 Difference]: Without dead ends: 119 [2023-02-15 20:48:35,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 20:48:35,098 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 20 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:48:35,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 85 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:48:35,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-02-15 20:48:35,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 109. [2023-02-15 20:48:35,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 81 states have (on average 1.2222222222222223) internal successors, (99), 82 states have internal predecessors, (99), 19 states have call successors, (19), 9 states have call predecessors, (19), 8 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2023-02-15 20:48:35,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 136 transitions. [2023-02-15 20:48:35,115 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 136 transitions. Word has length 43 [2023-02-15 20:48:35,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:48:35,115 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 136 transitions. [2023-02-15 20:48:35,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-15 20:48:35,115 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 136 transitions. [2023-02-15 20:48:35,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-15 20:48:35,116 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:48:35,116 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 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, 1, 1, 1] [2023-02-15 20:48:35,122 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-02-15 20:48:35,320 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 [2023-02-15 20:48:35,321 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:48:35,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:48:35,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1023958197, now seen corresponding path program 1 times [2023-02-15 20:48:35,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:48:35,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217409159] [2023-02-15 20:48:35,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:48:35,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:48:35,332 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:48:35,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2031882076] [2023-02-15 20:48:35,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:48:35,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:48:35,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:48:35,334 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) [2023-02-15 20:48:35,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-15 20:48:35,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:48:35,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-15 20:48:35,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:48:35,423 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 20:48:35,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:48:35,484 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-15 20:48:35,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:48:35,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217409159] [2023-02-15 20:48:35,484 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:48:35,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031882076] [2023-02-15 20:48:35,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031882076] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:48:35,485 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:48:35,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2023-02-15 20:48:35,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914615924] [2023-02-15 20:48:35,485 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:48:35,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 20:48:35,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:48:35,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 20:48:35,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2023-02-15 20:48:35,487 INFO L87 Difference]: Start difference. First operand 109 states and 136 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2023-02-15 20:48:35,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:48:35,604 INFO L93 Difference]: Finished difference Result 219 states and 282 transitions. [2023-02-15 20:48:35,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-15 20:48:35,604 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) Word has length 45 [2023-02-15 20:48:35,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:48:35,605 INFO L225 Difference]: With dead ends: 219 [2023-02-15 20:48:35,606 INFO L226 Difference]: Without dead ends: 172 [2023-02-15 20:48:35,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2023-02-15 20:48:35,606 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 101 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:48:35,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 242 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:48:35,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2023-02-15 20:48:35,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 153. [2023-02-15 20:48:35,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 114 states have (on average 1.236842105263158) internal successors, (141), 115 states have internal predecessors, (141), 28 states have call successors, (28), 11 states have call predecessors, (28), 10 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2023-02-15 20:48:35,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 196 transitions. [2023-02-15 20:48:35,623 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 196 transitions. Word has length 45 [2023-02-15 20:48:35,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:48:35,623 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 196 transitions. [2023-02-15 20:48:35,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2023-02-15 20:48:35,623 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 196 transitions. [2023-02-15 20:48:35,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-15 20:48:35,624 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:48:35,624 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:48:35,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-15 20:48:35,829 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 [2023-02-15 20:48:35,829 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:48:35,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:48:35,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1104536814, now seen corresponding path program 1 times [2023-02-15 20:48:35,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:48:35,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771551238] [2023-02-15 20:48:35,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:48:35,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:48:35,835 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:48:35,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1046296277] [2023-02-15 20:48:35,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:48:35,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:48:35,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:48:35,836 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) [2023-02-15 20:48:35,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-15 20:48:35,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:48:35,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-15 20:48:35,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:48:35,932 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 20:48:35,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:48:36,013 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-15 20:48:36,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:48:36,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771551238] [2023-02-15 20:48:36,013 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:48:36,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046296277] [2023-02-15 20:48:36,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046296277] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:48:36,014 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:48:36,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-02-15 20:48:36,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015112308] [2023-02-15 20:48:36,014 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:48:36,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-15 20:48:36,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:48:36,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-15 20:48:36,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-02-15 20:48:36,015 INFO L87 Difference]: Start difference. First operand 153 states and 196 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 11 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2023-02-15 20:48:36,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:48:36,209 INFO L93 Difference]: Finished difference Result 211 states and 277 transitions. [2023-02-15 20:48:36,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-15 20:48:36,210 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 11 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) Word has length 51 [2023-02-15 20:48:36,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:48:36,211 INFO L225 Difference]: With dead ends: 211 [2023-02-15 20:48:36,211 INFO L226 Difference]: Without dead ends: 206 [2023-02-15 20:48:36,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2023-02-15 20:48:36,212 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 118 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:48:36,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 307 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:48:36,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2023-02-15 20:48:36,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 198. [2023-02-15 20:48:36,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 147 states have (on average 1.2312925170068028) internal successors, (181), 151 states have internal predecessors, (181), 38 states have call successors, (38), 13 states have call predecessors, (38), 12 states have return successors, (37), 33 states have call predecessors, (37), 37 states have call successors, (37) [2023-02-15 20:48:36,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 256 transitions. [2023-02-15 20:48:36,231 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 256 transitions. Word has length 51 [2023-02-15 20:48:36,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:48:36,231 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 256 transitions. [2023-02-15 20:48:36,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 11 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2023-02-15 20:48:36,231 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 256 transitions. [2023-02-15 20:48:36,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-02-15 20:48:36,232 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:48:36,232 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:48:36,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-15 20:48:36,437 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 [2023-02-15 20:48:36,437 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:48:36,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:48:36,438 INFO L85 PathProgramCache]: Analyzing trace with hash 540498080, now seen corresponding path program 1 times [2023-02-15 20:48:36,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:48:36,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358346849] [2023-02-15 20:48:36,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:48:36,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:48:36,444 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:48:36,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [190678083] [2023-02-15 20:48:36,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:48:36,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:48:36,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:48:36,446 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) [2023-02-15 20:48:36,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-15 20:48:36,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:48:36,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-15 20:48:36,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:48:36,536 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 64 proven. 12 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2023-02-15 20:48:36,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:48:36,594 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 38 proven. 12 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2023-02-15 20:48:36,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:48:36,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358346849] [2023-02-15 20:48:36,594 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:48:36,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190678083] [2023-02-15 20:48:36,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190678083] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:48:36,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:48:36,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2023-02-15 20:48:36,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305755818] [2023-02-15 20:48:36,595 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:48:36,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 20:48:36,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:48:36,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 20:48:36,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 20:48:36,596 INFO L87 Difference]: Start difference. First operand 198 states and 256 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-02-15 20:48:36,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:48:36,689 INFO L93 Difference]: Finished difference Result 502 states and 696 transitions. [2023-02-15 20:48:36,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 20:48:36,690 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 87 [2023-02-15 20:48:36,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:48:36,692 INFO L225 Difference]: With dead ends: 502 [2023-02-15 20:48:36,692 INFO L226 Difference]: Without dead ends: 359 [2023-02-15 20:48:36,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 168 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-15 20:48:36,693 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 16 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:48:36,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 129 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:48:36,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2023-02-15 20:48:36,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 342. [2023-02-15 20:48:36,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 257 states have (on average 1.264591439688716) internal successors, (325), 263 states have internal predecessors, (325), 72 states have call successors, (72), 13 states have call predecessors, (72), 12 states have return successors, (71), 65 states have call predecessors, (71), 71 states have call successors, (71) [2023-02-15 20:48:36,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 468 transitions. [2023-02-15 20:48:36,726 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 468 transitions. Word has length 87 [2023-02-15 20:48:36,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:48:36,726 INFO L495 AbstractCegarLoop]: Abstraction has 342 states and 468 transitions. [2023-02-15 20:48:36,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-02-15 20:48:36,726 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 468 transitions. [2023-02-15 20:48:36,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-02-15 20:48:36,727 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:48:36,728 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 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, 1, 1, 1] [2023-02-15 20:48:36,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-15 20:48:36,935 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 [2023-02-15 20:48:36,935 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:48:36,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:48:36,936 INFO L85 PathProgramCache]: Analyzing trace with hash -134976430, now seen corresponding path program 2 times [2023-02-15 20:48:36,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:48:36,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835662311] [2023-02-15 20:48:36,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:48:36,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:48:36,941 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:48:36,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [247604980] [2023-02-15 20:48:36,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 20:48:36,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:48:36,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:48:36,943 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) [2023-02-15 20:48:36,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-15 20:48:37,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 20:48:37,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:48:37,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-15 20:48:37,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:48:37,129 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 58 proven. 110 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 20:48:37,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:48:37,283 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 32 proven. 26 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2023-02-15 20:48:37,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:48:37,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835662311] [2023-02-15 20:48:37,283 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:48:37,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247604980] [2023-02-15 20:48:37,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247604980] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:48:37,284 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:48:37,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2023-02-15 20:48:37,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687909939] [2023-02-15 20:48:37,284 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:48:37,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-15 20:48:37,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:48:37,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-15 20:48:37,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2023-02-15 20:48:37,286 INFO L87 Difference]: Start difference. First operand 342 states and 468 transitions. Second operand has 20 states, 20 states have (on average 4.65) internal successors, (93), 20 states have internal predecessors, (93), 17 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (20), 17 states have call predecessors, (20), 17 states have call successors, (20) [2023-02-15 20:48:37,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:48:37,689 INFO L93 Difference]: Finished difference Result 985 states and 1422 transitions. [2023-02-15 20:48:37,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-02-15 20:48:37,689 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.65) internal successors, (93), 20 states have internal predecessors, (93), 17 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (20), 17 states have call predecessors, (20), 17 states have call successors, (20) Word has length 87 [2023-02-15 20:48:37,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:48:37,693 INFO L225 Difference]: With dead ends: 985 [2023-02-15 20:48:37,693 INFO L226 Difference]: Without dead ends: 842 [2023-02-15 20:48:37,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=403, Invalid=719, Unknown=0, NotChecked=0, Total=1122 [2023-02-15 20:48:37,695 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 279 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 20:48:37,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 415 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 20:48:37,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2023-02-15 20:48:37,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 793. [2023-02-15 20:48:37,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 599 states have (on average 1.2671118530884808) internal successors, (759), 608 states have internal predecessors, (759), 175 states have call successors, (175), 19 states have call predecessors, (175), 18 states have return successors, (174), 165 states have call predecessors, (174), 174 states have call successors, (174) [2023-02-15 20:48:37,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 1108 transitions. [2023-02-15 20:48:37,816 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 1108 transitions. Word has length 87 [2023-02-15 20:48:37,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:48:37,817 INFO L495 AbstractCegarLoop]: Abstraction has 793 states and 1108 transitions. [2023-02-15 20:48:37,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.65) internal successors, (93), 20 states have internal predecessors, (93), 17 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (20), 17 states have call predecessors, (20), 17 states have call successors, (20) [2023-02-15 20:48:37,817 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 1108 transitions. [2023-02-15 20:48:37,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-02-15 20:48:37,819 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:48:37,819 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 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] [2023-02-15 20:48:37,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-15 20:48:38,025 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 [2023-02-15 20:48:38,025 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:48:38,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:48:38,025 INFO L85 PathProgramCache]: Analyzing trace with hash 2132027339, now seen corresponding path program 1 times [2023-02-15 20:48:38,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:48:38,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716895873] [2023-02-15 20:48:38,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:48:38,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:48:38,032 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:48:38,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [253897517] [2023-02-15 20:48:38,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:48:38,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:48:38,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:48:38,034 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) [2023-02-15 20:48:38,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-15 20:48:38,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:48:38,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 21 conjunts are in the unsatisfiable core [2023-02-15 20:48:38,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:48:38,199 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 22 proven. 190 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 20:48:38,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:48:38,375 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 22 proven. 46 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2023-02-15 20:48:38,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:48:38,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716895873] [2023-02-15 20:48:38,376 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:48:38,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253897517] [2023-02-15 20:48:38,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253897517] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:48:38,376 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:48:38,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 24 [2023-02-15 20:48:38,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243341001] [2023-02-15 20:48:38,376 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:48:38,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-15 20:48:38,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:48:38,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-15 20:48:38,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2023-02-15 20:48:38,378 INFO L87 Difference]: Start difference. First operand 793 states and 1108 transitions. Second operand has 24 states, 24 states have (on average 4.375) internal successors, (105), 24 states have internal predecessors, (105), 21 states have call successors, (23), 12 states have call predecessors, (23), 11 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2023-02-15 20:48:38,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:48:38,918 INFO L93 Difference]: Finished difference Result 1285 states and 1798 transitions. [2023-02-15 20:48:38,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-02-15 20:48:38,918 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.375) internal successors, (105), 24 states have internal predecessors, (105), 21 states have call successors, (23), 12 states have call predecessors, (23), 11 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) Word has length 93 [2023-02-15 20:48:38,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:48:38,921 INFO L225 Difference]: With dead ends: 1285 [2023-02-15 20:48:38,921 INFO L226 Difference]: Without dead ends: 795 [2023-02-15 20:48:38,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=584, Invalid=1056, Unknown=0, NotChecked=0, Total=1640 [2023-02-15 20:48:38,923 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 425 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 20:48:38,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [425 Valid, 417 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 20:48:38,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2023-02-15 20:48:39,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 740. [2023-02-15 20:48:39,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 555 states have (on average 1.2198198198198198) internal successors, (677), 559 states have internal predecessors, (677), 162 states have call successors, (162), 23 states have call predecessors, (162), 22 states have return successors, (161), 157 states have call predecessors, (161), 161 states have call successors, (161) [2023-02-15 20:48:39,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1000 transitions. [2023-02-15 20:48:39,007 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1000 transitions. Word has length 93 [2023-02-15 20:48:39,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:48:39,008 INFO L495 AbstractCegarLoop]: Abstraction has 740 states and 1000 transitions. [2023-02-15 20:48:39,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.375) internal successors, (105), 24 states have internal predecessors, (105), 21 states have call successors, (23), 12 states have call predecessors, (23), 11 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2023-02-15 20:48:39,008 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1000 transitions. [2023-02-15 20:48:39,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-02-15 20:48:39,009 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:48:39,009 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:48:39,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-15 20:48:39,214 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 [2023-02-15 20:48:39,214 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:48:39,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:48:39,215 INFO L85 PathProgramCache]: Analyzing trace with hash 519126930, now seen corresponding path program 1 times [2023-02-15 20:48:39,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:48:39,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026641923] [2023-02-15 20:48:39,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:48:39,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:48:39,226 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:48:39,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1443738691] [2023-02-15 20:48:39,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:48:39,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:48:39,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:48:39,227 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) [2023-02-15 20:48:39,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-15 20:48:39,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:48:39,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-15 20:48:39,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:48:39,402 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 20 proven. 236 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 20:48:39,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:48:39,599 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 20 proven. 56 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2023-02-15 20:48:39,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:48:39,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026641923] [2023-02-15 20:48:39,600 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:48:39,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443738691] [2023-02-15 20:48:39,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443738691] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:48:39,600 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:48:39,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2023-02-15 20:48:39,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676394321] [2023-02-15 20:48:39,601 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:48:39,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-15 20:48:39,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:48:39,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-15 20:48:39,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2023-02-15 20:48:39,603 INFO L87 Difference]: Start difference. First operand 740 states and 1000 transitions. Second operand has 24 states, 24 states have (on average 4.666666666666667) internal successors, (112), 24 states have internal predecessors, (112), 21 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (24), 20 states have call predecessors, (24), 20 states have call successors, (24) [2023-02-15 20:48:40,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:48:40,110 INFO L93 Difference]: Finished difference Result 757 states and 1018 transitions. [2023-02-15 20:48:40,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-02-15 20:48:40,111 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.666666666666667) internal successors, (112), 24 states have internal predecessors, (112), 21 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (24), 20 states have call predecessors, (24), 20 states have call successors, (24) Word has length 99 [2023-02-15 20:48:40,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:48:40,114 INFO L225 Difference]: With dead ends: 757 [2023-02-15 20:48:40,114 INFO L226 Difference]: Without dead ends: 752 [2023-02-15 20:48:40,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 172 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=551, Invalid=1009, Unknown=0, NotChecked=0, Total=1560 [2023-02-15 20:48:40,115 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 313 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 20:48:40,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [313 Valid, 381 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 20:48:40,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2023-02-15 20:48:40,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 746. [2023-02-15 20:48:40,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 561 states have (on average 1.1853832442067735) internal successors, (665), 563 states have internal predecessors, (665), 162 states have call successors, (162), 23 states have call predecessors, (162), 22 states have return successors, (161), 159 states have call predecessors, (161), 161 states have call successors, (161) [2023-02-15 20:48:40,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 988 transitions. [2023-02-15 20:48:40,170 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 988 transitions. Word has length 99 [2023-02-15 20:48:40,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:48:40,170 INFO L495 AbstractCegarLoop]: Abstraction has 746 states and 988 transitions. [2023-02-15 20:48:40,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.666666666666667) internal successors, (112), 24 states have internal predecessors, (112), 21 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (24), 20 states have call predecessors, (24), 20 states have call successors, (24) [2023-02-15 20:48:40,170 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 988 transitions. [2023-02-15 20:48:40,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2023-02-15 20:48:40,173 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:48:40,173 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 10, 8, 8, 8, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:48:40,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-15 20:48:40,377 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 [2023-02-15 20:48:40,377 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:48:40,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:48:40,377 INFO L85 PathProgramCache]: Analyzing trace with hash 682851631, now seen corresponding path program 3 times [2023-02-15 20:48:40,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:48:40,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651419455] [2023-02-15 20:48:40,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:48:40,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:48:40,384 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:48:40,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1627270472] [2023-02-15 20:48:40,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 20:48:40,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:48:40,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:48:40,386 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) [2023-02-15 20:48:40,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-15 20:48:40,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-15 20:48:40,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:48:40,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-15 20:48:40,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:48:40,463 INFO L134 CoverageAnalysis]: Checked inductivity of 898 backedges. 236 proven. 0 refuted. 0 times theorem prover too weak. 662 trivial. 0 not checked. [2023-02-15 20:48:40,464 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 20:48:40,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:48:40,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651419455] [2023-02-15 20:48:40,464 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:48:40,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627270472] [2023-02-15 20:48:40,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627270472] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 20:48:40,464 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 20:48:40,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 20:48:40,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271694663] [2023-02-15 20:48:40,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 20:48:40,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 20:48:40,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:48:40,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 20:48:40,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 20:48:40,466 INFO L87 Difference]: Start difference. First operand 746 states and 988 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-02-15 20:48:40,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:48:40,570 INFO L93 Difference]: Finished difference Result 970 states and 1308 transitions. [2023-02-15 20:48:40,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 20:48:40,571 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 169 [2023-02-15 20:48:40,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:48:40,574 INFO L225 Difference]: With dead ends: 970 [2023-02-15 20:48:40,574 INFO L226 Difference]: Without dead ends: 819 [2023-02-15 20:48:40,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-02-15 20:48:40,575 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 17 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:48:40,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 149 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:48:40,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2023-02-15 20:48:40,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 760. [2023-02-15 20:48:40,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 572 states have (on average 1.1713286713286712) internal successors, (670), 574 states have internal predecessors, (670), 164 states have call successors, (164), 24 states have call predecessors, (164), 23 states have return successors, (163), 161 states have call predecessors, (163), 163 states have call successors, (163) [2023-02-15 20:48:40,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 997 transitions. [2023-02-15 20:48:40,631 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 997 transitions. Word has length 169 [2023-02-15 20:48:40,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:48:40,631 INFO L495 AbstractCegarLoop]: Abstraction has 760 states and 997 transitions. [2023-02-15 20:48:40,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-02-15 20:48:40,632 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 997 transitions. [2023-02-15 20:48:40,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2023-02-15 20:48:40,634 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:48:40,634 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 10, 9, 9, 9, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:48:40,641 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-02-15 20:48:40,838 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 [2023-02-15 20:48:40,839 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:48:40,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:48:40,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1715827176, now seen corresponding path program 4 times [2023-02-15 20:48:40,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:48:40,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985797519] [2023-02-15 20:48:40,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:48:40,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:48:40,850 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:48:40,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2049999376] [2023-02-15 20:48:40,850 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 20:48:40,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:48:40,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:48:40,852 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) [2023-02-15 20:48:40,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-15 20:48:40,909 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 20:48:40,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:48:40,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 2 conjunts are in the unsatisfiable core [2023-02-15 20:48:40,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:48:40,926 INFO L134 CoverageAnalysis]: Checked inductivity of 988 backedges. 556 proven. 0 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2023-02-15 20:48:40,926 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 20:48:40,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:48:40,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985797519] [2023-02-15 20:48:40,926 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:48:40,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049999376] [2023-02-15 20:48:40,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049999376] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 20:48:40,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 20:48:40,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 20:48:40,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465717378] [2023-02-15 20:48:40,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 20:48:40,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 20:48:40,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:48:40,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 20:48:40,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 20:48:40,928 INFO L87 Difference]: Start difference. First operand 760 states and 997 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-02-15 20:48:41,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:48:41,007 INFO L93 Difference]: Finished difference Result 1272 states and 1673 transitions. [2023-02-15 20:48:41,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 20:48:41,008 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 175 [2023-02-15 20:48:41,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:48:41,011 INFO L225 Difference]: With dead ends: 1272 [2023-02-15 20:48:41,011 INFO L226 Difference]: Without dead ends: 794 [2023-02-15 20:48:41,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 20:48:41,012 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 3 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:48:41,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 75 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:48:41,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2023-02-15 20:48:41,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 727. [2023-02-15 20:48:41,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 727 states, 548 states have (on average 1.1605839416058394) internal successors, (636), 551 states have internal predecessors, (636), 155 states have call successors, (155), 24 states have call predecessors, (155), 23 states have return successors, (154), 151 states have call predecessors, (154), 154 states have call successors, (154) [2023-02-15 20:48:41,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 945 transitions. [2023-02-15 20:48:41,071 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 945 transitions. Word has length 175 [2023-02-15 20:48:41,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:48:41,071 INFO L495 AbstractCegarLoop]: Abstraction has 727 states and 945 transitions. [2023-02-15 20:48:41,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-02-15 20:48:41,072 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 945 transitions. [2023-02-15 20:48:41,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2023-02-15 20:48:41,074 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:48:41,074 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 10, 9, 9, 9, 7, 6, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:48:41,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-15 20:48:41,278 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 [2023-02-15 20:48:41,278 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:48:41,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:48:41,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1774864442, now seen corresponding path program 5 times [2023-02-15 20:48:41,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:48:41,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488854512] [2023-02-15 20:48:41,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:48:41,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:48:41,286 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:48:41,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [883440421] [2023-02-15 20:48:41,287 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 20:48:41,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:48:41,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:48:41,288 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) [2023-02-15 20:48:41,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-15 20:48:41,447 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2023-02-15 20:48:41,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:48:41,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-15 20:48:41,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:48:41,550 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 196 proven. 88 refuted. 0 times theorem prover too weak. 708 trivial. 0 not checked. [2023-02-15 20:48:41,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:48:41,741 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 196 proven. 88 refuted. 0 times theorem prover too weak. 708 trivial. 0 not checked. [2023-02-15 20:48:41,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:48:41,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488854512] [2023-02-15 20:48:41,742 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:48:41,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883440421] [2023-02-15 20:48:41,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883440421] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:48:41,742 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:48:41,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-02-15 20:48:41,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404702446] [2023-02-15 20:48:41,742 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:48:41,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-15 20:48:41,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:48:41,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-15 20:48:41,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2023-02-15 20:48:41,744 INFO L87 Difference]: Start difference. First operand 727 states and 945 transitions. Second operand has 14 states, 14 states have (on average 7.357142857142857) internal successors, (103), 14 states have internal predecessors, (103), 14 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (29), 13 states have call predecessors, (29), 13 states have call successors, (29) [2023-02-15 20:48:43,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:48:43,175 INFO L93 Difference]: Finished difference Result 2840 states and 3890 transitions. [2023-02-15 20:48:43,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-02-15 20:48:43,176 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 7.357142857142857) internal successors, (103), 14 states have internal predecessors, (103), 14 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (29), 13 states have call predecessors, (29), 13 states have call successors, (29) Word has length 175 [2023-02-15 20:48:43,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:48:43,183 INFO L225 Difference]: With dead ends: 2840 [2023-02-15 20:48:43,184 INFO L226 Difference]: Without dead ends: 2571 [2023-02-15 20:48:43,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 366 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=532, Invalid=1820, Unknown=0, NotChecked=0, Total=2352 [2023-02-15 20:48:43,185 INFO L413 NwaCegarLoop]: 249 mSDtfsCounter, 344 mSDsluCounter, 761 mSDsCounter, 0 mSdLazyCounter, 1134 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 1010 SdHoareTripleChecker+Invalid, 1313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 1134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-15 20:48:43,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [348 Valid, 1010 Invalid, 1313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 1134 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-15 20:48:43,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2571 states. [2023-02-15 20:48:43,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2571 to 1820. [2023-02-15 20:48:43,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1820 states, 1374 states have (on average 1.1812227074235808) internal successors, (1623), 1382 states have internal predecessors, (1623), 422 states have call successors, (422), 24 states have call predecessors, (422), 23 states have return successors, (421), 413 states have call predecessors, (421), 421 states have call successors, (421) [2023-02-15 20:48:43,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1820 states to 1820 states and 2466 transitions. [2023-02-15 20:48:43,393 INFO L78 Accepts]: Start accepts. Automaton has 1820 states and 2466 transitions. Word has length 175 [2023-02-15 20:48:43,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:48:43,393 INFO L495 AbstractCegarLoop]: Abstraction has 1820 states and 2466 transitions. [2023-02-15 20:48:43,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.357142857142857) internal successors, (103), 14 states have internal predecessors, (103), 14 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (29), 13 states have call predecessors, (29), 13 states have call successors, (29) [2023-02-15 20:48:43,394 INFO L276 IsEmpty]: Start isEmpty. Operand 1820 states and 2466 transitions. [2023-02-15 20:48:43,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2023-02-15 20:48:43,405 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:48:43,405 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 9, 8, 8, 8, 8, 7, 7, 7, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:48:43,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-15 20:48:43,616 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 [2023-02-15 20:48:43,616 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:48:43,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:48:43,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1985926558, now seen corresponding path program 6 times [2023-02-15 20:48:43,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:48:43,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840752503] [2023-02-15 20:48:43,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:48:43,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:48:43,624 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:48:43,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [289010375] [2023-02-15 20:48:43,624 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 20:48:43,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:48:43,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:48:43,625 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) [2023-02-15 20:48:43,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-15 20:48:44,740 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2023-02-15 20:48:44,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:48:44,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 47 conjunts are in the unsatisfiable core [2023-02-15 20:48:44,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:49:04,035 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 350 proven. 167 refuted. 0 times theorem prover too weak. 467 trivial. 0 not checked. [2023-02-15 20:49:04,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:49:08,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:49:08,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840752503] [2023-02-15 20:49:08,787 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:49:08,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289010375] [2023-02-15 20:49:08,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289010375] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:49:08,787 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 20:49:08,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2023-02-15 20:49:08,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773515930] [2023-02-15 20:49:08,787 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 20:49:08,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-15 20:49:08,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:49:08,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-15 20:49:08,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=469, Unknown=2, NotChecked=0, Total=552 [2023-02-15 20:49:08,788 INFO L87 Difference]: Start difference. First operand 1820 states and 2466 transitions. Second operand has 17 states, 16 states have (on average 4.6875) internal successors, (75), 15 states have internal predecessors, (75), 12 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (20), 11 states have call predecessors, (20), 12 states have call successors, (20) [2023-02-15 20:49:10,438 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 20:49:12,966 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 20:49:14,566 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 20:49:21,173 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 20:49:23,978 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 20:49:31,451 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 20:49:35,064 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 20:49:38,497 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 20:49:39,790 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 20:49:42,204 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 20:49:50,792 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 20:49:58,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:49:58,680 INFO L93 Difference]: Finished difference Result 3288 states and 4521 transitions. [2023-02-15 20:49:58,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-15 20:49:58,681 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 4.6875) internal successors, (75), 15 states have internal predecessors, (75), 12 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (20), 11 states have call predecessors, (20), 12 states have call successors, (20) Word has length 175 [2023-02-15 20:49:58,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:49:58,688 INFO L225 Difference]: With dead ends: 3288 [2023-02-15 20:49:58,688 INFO L226 Difference]: Without dead ends: 2597 [2023-02-15 20:49:58,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 235 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=208, Invalid=1121, Unknown=3, NotChecked=0, Total=1332 [2023-02-15 20:49:58,693 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 181 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 962 mSolverCounterSat, 95 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 695 SdHoareTripleChecker+Invalid, 1062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 962 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:49:58,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 695 Invalid, 1062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 962 Invalid, 5 Unknown, 0 Unchecked, 41.1s Time] [2023-02-15 20:49:58,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2597 states. [2023-02-15 20:49:59,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2597 to 2304. [2023-02-15 20:49:59,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2304 states, 1741 states have (on average 1.183228029867892) internal successors, (2060), 1755 states have internal predecessors, (2060), 539 states have call successors, (539), 24 states have call predecessors, (539), 23 states have return successors, (538), 524 states have call predecessors, (538), 538 states have call successors, (538) [2023-02-15 20:49:59,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2304 states to 2304 states and 3137 transitions. [2023-02-15 20:49:59,176 INFO L78 Accepts]: Start accepts. Automaton has 2304 states and 3137 transitions. Word has length 175 [2023-02-15 20:49:59,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:49:59,176 INFO L495 AbstractCegarLoop]: Abstraction has 2304 states and 3137 transitions. [2023-02-15 20:49:59,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 4.6875) internal successors, (75), 15 states have internal predecessors, (75), 12 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (20), 11 states have call predecessors, (20), 12 states have call successors, (20) [2023-02-15 20:49:59,177 INFO L276 IsEmpty]: Start isEmpty. Operand 2304 states and 3137 transitions. [2023-02-15 20:49:59,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2023-02-15 20:49:59,182 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:49:59,182 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 10, 9, 9, 9, 7, 6, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:49:59,197 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-02-15 20:49:59,387 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 [2023-02-15 20:49:59,388 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:49:59,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:49:59,388 INFO L85 PathProgramCache]: Analyzing trace with hash -892632122, now seen corresponding path program 7 times [2023-02-15 20:49:59,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:49:59,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714492680] [2023-02-15 20:49:59,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:49:59,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:49:59,395 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:49:59,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1959125418] [2023-02-15 20:49:59,395 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 20:49:59,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:49:59,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:49:59,397 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) [2023-02-15 20:49:59,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-15 20:49:59,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:49:59,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 41 conjunts are in the unsatisfiable core [2023-02-15 20:49:59,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:49:59,748 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 58 proven. 930 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 20:49:59,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:50:00,001 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 58 proven. 246 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2023-02-15 20:50:00,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:50:00,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714492680] [2023-02-15 20:50:00,001 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:50:00,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959125418] [2023-02-15 20:50:00,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959125418] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:50:00,001 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:50:00,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 23 [2023-02-15 20:50:00,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99543256] [2023-02-15 20:50:00,002 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:50:00,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-15 20:50:00,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:50:00,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-15 20:50:00,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2023-02-15 20:50:00,003 INFO L87 Difference]: Start difference. First operand 2304 states and 3137 transitions. Second operand has 23 states, 23 states have (on average 5.869565217391305) internal successors, (135), 23 states have internal predecessors, (135), 21 states have call successors, (43), 22 states have call predecessors, (43), 21 states have return successors, (42), 20 states have call predecessors, (42), 20 states have call successors, (42) [2023-02-15 20:50:00,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:50:00,803 INFO L93 Difference]: Finished difference Result 2433 states and 3314 transitions. [2023-02-15 20:50:00,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-02-15 20:50:00,804 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.869565217391305) internal successors, (135), 23 states have internal predecessors, (135), 21 states have call successors, (43), 22 states have call predecessors, (43), 21 states have return successors, (42), 20 states have call predecessors, (42), 20 states have call successors, (42) Word has length 175 [2023-02-15 20:50:00,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:50:00,820 INFO L225 Difference]: With dead ends: 2433 [2023-02-15 20:50:00,820 INFO L226 Difference]: Without dead ends: 2364 [2023-02-15 20:50:00,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 306 SyntacticMatches, 21 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=611, Invalid=1029, Unknown=0, NotChecked=0, Total=1640 [2023-02-15 20:50:00,821 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 226 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 20:50:00,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 391 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 20:50:00,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2364 states. [2023-02-15 20:50:01,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2364 to 2364. [2023-02-15 20:50:01,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2364 states, 1801 states have (on average 1.1771238200999445) internal successors, (2120), 1801 states have internal predecessors, (2120), 539 states have call successors, (539), 24 states have call predecessors, (539), 23 states have return successors, (538), 538 states have call predecessors, (538), 538 states have call successors, (538) [2023-02-15 20:50:01,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2364 states to 2364 states and 3197 transitions. [2023-02-15 20:50:01,256 INFO L78 Accepts]: Start accepts. Automaton has 2364 states and 3197 transitions. Word has length 175 [2023-02-15 20:50:01,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:50:01,257 INFO L495 AbstractCegarLoop]: Abstraction has 2364 states and 3197 transitions. [2023-02-15 20:50:01,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.869565217391305) internal successors, (135), 23 states have internal predecessors, (135), 21 states have call successors, (43), 22 states have call predecessors, (43), 21 states have return successors, (42), 20 states have call predecessors, (42), 20 states have call successors, (42) [2023-02-15 20:50:01,257 INFO L276 IsEmpty]: Start isEmpty. Operand 2364 states and 3197 transitions. [2023-02-15 20:50:01,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2023-02-15 20:50:01,262 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:50:01,262 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 8, 8, 8, 8, 8, 8, 8, 8, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:50:01,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-02-15 20:50:01,467 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 [2023-02-15 20:50:01,467 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:50:01,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:50:01,468 INFO L85 PathProgramCache]: Analyzing trace with hash 2005289494, now seen corresponding path program 2 times [2023-02-15 20:50:01,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:50:01,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848338716] [2023-02-15 20:50:01,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:50:01,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:50:01,474 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:50:01,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1989433310] [2023-02-15 20:50:01,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 20:50:01,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:50:01,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:50:01,480 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) [2023-02-15 20:50:01,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-15 20:50:01,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 20:50:01,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:50:01,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-15 20:50:01,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:50:02,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1060 backedges. 490 proven. 112 refuted. 0 times theorem prover too weak. 458 trivial. 0 not checked. [2023-02-15 20:50:02,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:50:03,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1060 backedges. 189 proven. 92 refuted. 0 times theorem prover too weak. 779 trivial. 0 not checked. [2023-02-15 20:50:03,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:50:03,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848338716] [2023-02-15 20:50:03,866 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:50:03,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989433310] [2023-02-15 20:50:03,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989433310] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:50:03,866 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:50:03,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2023-02-15 20:50:03,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980305800] [2023-02-15 20:50:03,867 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:50:03,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-15 20:50:03,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:50:03,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-15 20:50:03,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2023-02-15 20:50:03,868 INFO L87 Difference]: Start difference. First operand 2364 states and 3197 transitions. Second operand has 20 states, 19 states have (on average 6.105263157894737) internal successors, (116), 17 states have internal predecessors, (116), 15 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (38), 17 states have call predecessors, (38), 15 states have call successors, (38) [2023-02-15 20:50:10,174 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-15 20:50:12,450 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-15 20:50:14,749 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-15 20:50:18,039 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 20:50:20,041 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-15 20:50:22,734 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-15 20:50:28,499 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-15 20:50:32,802 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-15 20:50:34,678 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-15 20:50:37,568 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-15 20:50:38,919 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-15 20:50:40,092 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-15 20:51:01,318 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-15 20:51:07,287 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-15 20:51:09,105 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-15 20:51:11,874 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-15 20:51:13,925 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-15 20:51:13,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:51:13,936 INFO L93 Difference]: Finished difference Result 3839 states and 5272 transitions. [2023-02-15 20:51:13,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-15 20:51:13,937 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 6.105263157894737) internal successors, (116), 17 states have internal predecessors, (116), 15 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (38), 17 states have call predecessors, (38), 15 states have call successors, (38) Word has length 179 [2023-02-15 20:51:13,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:51:13,945 INFO L225 Difference]: With dead ends: 3839 [2023-02-15 20:51:13,945 INFO L226 Difference]: Without dead ends: 3124 [2023-02-15 20:51:13,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 338 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 26.3s TimeCoverageRelationStatistics Valid=407, Invalid=1658, Unknown=5, NotChecked=0, Total=2070 [2023-02-15 20:51:13,948 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 202 mSDsluCounter, 663 mSDsCounter, 0 mSdLazyCounter, 949 mSolverCounterSat, 110 mSolverCounterUnsat, 16 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 1075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 949 IncrementalHoareTripleChecker+Invalid, 16 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 44.4s IncrementalHoareTripleChecker+Time [2023-02-15 20:51:13,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 813 Invalid, 1075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 949 Invalid, 16 Unknown, 0 Unchecked, 44.4s Time] [2023-02-15 20:51:13,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3124 states. [2023-02-15 20:51:14,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3124 to 2782. [2023-02-15 20:51:14,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2782 states, 2120 states have (on average 1.1872641509433963) internal successors, (2517), 2120 states have internal predecessors, (2517), 638 states have call successors, (638), 24 states have call predecessors, (638), 23 states have return successors, (637), 637 states have call predecessors, (637), 637 states have call successors, (637) [2023-02-15 20:51:14,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2782 states to 2782 states and 3792 transitions. [2023-02-15 20:51:14,522 INFO L78 Accepts]: Start accepts. Automaton has 2782 states and 3792 transitions. Word has length 179 [2023-02-15 20:51:14,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:51:14,522 INFO L495 AbstractCegarLoop]: Abstraction has 2782 states and 3792 transitions. [2023-02-15 20:51:14,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 6.105263157894737) internal successors, (116), 17 states have internal predecessors, (116), 15 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (38), 17 states have call predecessors, (38), 15 states have call successors, (38) [2023-02-15 20:51:14,523 INFO L276 IsEmpty]: Start isEmpty. Operand 2782 states and 3792 transitions. [2023-02-15 20:51:14,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2023-02-15 20:51:14,529 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:51:14,529 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 9, 9, 9, 9, 7, 7, 7, 7, 5, 5, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:51:14,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-15 20:51:14,734 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 [2023-02-15 20:51:14,734 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:51:14,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:51:14,735 INFO L85 PathProgramCache]: Analyzing trace with hash 956641480, now seen corresponding path program 3 times [2023-02-15 20:51:14,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:51:14,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587447974] [2023-02-15 20:51:14,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:51:14,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:51:14,741 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:51:14,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1033397463] [2023-02-15 20:51:14,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 20:51:14,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:51:14,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:51:14,742 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) [2023-02-15 20:51:14,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-15 20:51:14,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-15 20:51:14,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:51:14,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-15 20:51:14,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:51:15,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1064 backedges. 131 proven. 1 refuted. 0 times theorem prover too weak. 932 trivial. 0 not checked. [2023-02-15 20:51:15,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:51:17,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:51:17,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587447974] [2023-02-15 20:51:17,340 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:51:17,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033397463] [2023-02-15 20:51:17,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033397463] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:51:17,340 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 20:51:17,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-02-15 20:51:17,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772913037] [2023-02-15 20:51:17,341 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 20:51:17,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 20:51:17,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:51:17,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 20:51:17,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=198, Unknown=1, NotChecked=0, Total=240 [2023-02-15 20:51:17,342 INFO L87 Difference]: Start difference. First operand 2782 states and 3792 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 10 states have internal predecessors, (35), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-15 20:51:19,418 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 [] [2023-02-15 20:51:20,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:51:20,387 INFO L93 Difference]: Finished difference Result 2923 states and 3989 transitions. [2023-02-15 20:51:20,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 20:51:20,387 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 10 states have internal predecessors, (35), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 179 [2023-02-15 20:51:20,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:51:20,395 INFO L225 Difference]: With dead ends: 2923 [2023-02-15 20:51:20,395 INFO L226 Difference]: Without dead ends: 2859 [2023-02-15 20:51:20,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=67, Invalid=312, Unknown=1, NotChecked=0, Total=380 [2023-02-15 20:51:20,396 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 43 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 16 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-02-15 20:51:20,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 237 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 229 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2023-02-15 20:51:20,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2859 states. [2023-02-15 20:51:20,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2859 to 2668. [2023-02-15 20:51:20,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2668 states, 2024 states have (on average 1.1823122529644268) internal successors, (2393), 2052 states have internal predecessors, (2393), 618 states have call successors, (618), 26 states have call predecessors, (618), 25 states have return successors, (617), 589 states have call predecessors, (617), 617 states have call successors, (617) [2023-02-15 20:51:20,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2668 states to 2668 states and 3628 transitions. [2023-02-15 20:51:20,952 INFO L78 Accepts]: Start accepts. Automaton has 2668 states and 3628 transitions. Word has length 179 [2023-02-15 20:51:20,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:51:20,952 INFO L495 AbstractCegarLoop]: Abstraction has 2668 states and 3628 transitions. [2023-02-15 20:51:20,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 10 states have internal predecessors, (35), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-15 20:51:20,952 INFO L276 IsEmpty]: Start isEmpty. Operand 2668 states and 3628 transitions. [2023-02-15 20:51:20,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2023-02-15 20:51:20,957 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:51:20,957 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 11, 11, 11, 11, 8, 6, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:51:20,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-02-15 20:51:21,163 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 [2023-02-15 20:51:21,163 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:51:21,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:51:21,163 INFO L85 PathProgramCache]: Analyzing trace with hash -95756022, now seen corresponding path program 4 times [2023-02-15 20:51:21,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:51:21,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20554526] [2023-02-15 20:51:21,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:51:21,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:51:21,170 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:51:21,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [327021989] [2023-02-15 20:51:21,170 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 20:51:21,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:51:21,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:51:21,171 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) [2023-02-15 20:51:21,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-02-15 20:51:21,266 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 20:51:21,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2023-02-15 20:51:21,266 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 20:51:21,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 20:51:21,373 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-15 20:51:21,373 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-02-15 20:51:21,374 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-02-15 20:51:21,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-02-15 20:51:21,581 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 [2023-02-15 20:51:21,583 INFO L445 BasicCegarLoop]: Path program histogram: [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:51:21,586 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-02-15 20:51:21,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.02 08:51:21 BoogieIcfgContainer [2023-02-15 20:51:21,632 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-02-15 20:51:21,632 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-02-15 20:51:21,632 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-02-15 20:51:21,632 INFO L275 PluginConnector]: Witness Printer initialized [2023-02-15 20:51:21,633 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 08:48:25" (3/4) ... [2023-02-15 20:51:21,637 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-02-15 20:51:21,705 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-02-15 20:51:21,705 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-02-15 20:51:21,706 INFO L158 Benchmark]: Toolchain (without parser) took 176734.49ms. Allocated memory was 151.0MB in the beginning and 413.1MB in the end (delta: 262.1MB). Free memory was 120.4MB in the beginning and 203.0MB in the end (delta: -82.6MB). Peak memory consumption was 180.3MB. Max. memory is 16.1GB. [2023-02-15 20:51:21,706 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 117.4MB. Free memory is still 72.4MB. There was no memory consumed. Max. memory is 16.1GB. [2023-02-15 20:51:21,706 INFO L158 Benchmark]: CACSL2BoogieTranslator took 143.04ms. Allocated memory is still 151.0MB. Free memory was 120.1MB in the beginning and 109.3MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-02-15 20:51:21,707 INFO L158 Benchmark]: Boogie Procedure Inliner took 18.99ms. Allocated memory is still 151.0MB. Free memory was 109.3MB in the beginning and 107.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-15 20:51:21,708 INFO L158 Benchmark]: Boogie Preprocessor took 14.23ms. Allocated memory is still 151.0MB. Free memory was 107.8MB in the beginning and 106.5MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-15 20:51:21,709 INFO L158 Benchmark]: RCFGBuilder took 220.73ms. Allocated memory is still 151.0MB. Free memory was 106.5MB in the beginning and 95.3MB in the end (delta: 11.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-02-15 20:51:21,709 INFO L158 Benchmark]: TraceAbstraction took 176260.27ms. Allocated memory was 151.0MB in the beginning and 413.1MB in the end (delta: 262.1MB). Free memory was 94.3MB in the beginning and 209.3MB in the end (delta: -115.0MB). Peak memory consumption was 148.8MB. Max. memory is 16.1GB. [2023-02-15 20:51:21,709 INFO L158 Benchmark]: Witness Printer took 73.11ms. Allocated memory is still 413.1MB. Free memory was 209.3MB in the beginning and 203.0MB in the end (delta: 6.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2023-02-15 20:51:21,715 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 117.4MB. Free memory is still 72.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 143.04ms. Allocated memory is still 151.0MB. Free memory was 120.1MB in the beginning and 109.3MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 18.99ms. Allocated memory is still 151.0MB. Free memory was 109.3MB in the beginning and 107.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 14.23ms. Allocated memory is still 151.0MB. Free memory was 107.8MB in the beginning and 106.5MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 220.73ms. Allocated memory is still 151.0MB. Free memory was 106.5MB in the beginning and 95.3MB in the end (delta: 11.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 176260.27ms. Allocated memory was 151.0MB in the beginning and 413.1MB in the end (delta: 262.1MB). Free memory was 94.3MB in the beginning and 209.3MB in the end (delta: -115.0MB). Peak memory consumption was 148.8MB. Max. memory is 16.1GB. * Witness Printer took 73.11ms. Allocated memory is still 413.1MB. Free memory was 209.3MB in the beginning and 203.0MB in the end (delta: 6.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 14]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int counter = 0; VAL [counter=0] [L21] int A, R; [L22] long long u, v, r; [L23] A = __VERIFIER_nondet_int() [L24] R = __VERIFIER_nondet_int() [L25] CALL assume_abort_if_not((((long long) R - 1) * ((long long) R - 1)) < A) VAL [\old(cond)=1, counter=0] [L9] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1, counter=0] [L25] RET assume_abort_if_not((((long long) R - 1) * ((long long) R - 1)) < A) VAL [A=573, counter=0, R=23] [L27] CALL assume_abort_if_not(A % 2 == 1) VAL [\old(cond)=1, counter=0] [L9] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1, counter=0] [L27] RET assume_abort_if_not(A % 2 == 1) VAL [A=573, counter=0, R=23] [L29] u = ((long long) 2 * R) + 1 [L30] v = 1 [L31] r = ((long long) R * R) - A VAL [A=573, counter=0, R=23, r=-44, u=47, v=1] [L34] EXPR counter++ VAL [A=573, counter=1, counter++=0, R=23, r=-44, u=47, v=1] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=1] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=573, counter=1, R=23, r=-44, u=47, v=1] [L36] COND FALSE !(!(r != 0)) VAL [A=573, counter=1, R=23, r=-44, u=47, v=1] [L39] EXPR counter++ VAL [A=573, counter=2, counter++=1, R=23, r=-44, u=47, v=1] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=2] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=573, counter=2, R=23, r=-44, u=47, v=1] [L41] COND TRUE !(r > 0) VAL [A=573, counter=2, r=-44, R=23, u=47, v=1] [L47] EXPR counter++ VAL [A=573, counter=3, counter++=2, r=-44, R=23, u=47, v=1] [L47] COND TRUE counter++<20 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=3] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=573, counter=3, r=-44, R=23, u=47, v=1] [L49] COND FALSE !(!(r < 0)) [L51] r = r + u [L52] u = u + 2 VAL [A=573, counter=3, R=23, r=3, u=49, v=1] [L47] EXPR counter++ VAL [A=573, counter=4, counter++=3, r=3, R=23, u=49, v=1] [L47] COND TRUE counter++<20 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=4] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=573, counter=4, r=3, R=23, u=49, v=1] [L49] COND TRUE !(r < 0) VAL [A=573, counter=4, R=23, r=3, u=49, v=1] [L34] EXPR counter++ VAL [A=573, counter=5, counter++=4, r=3, R=23, u=49, v=1] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=5] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=573, counter=5, R=23, r=3, u=49, v=1] [L36] COND FALSE !(!(r != 0)) VAL [A=573, counter=5, R=23, r=3, u=49, v=1] [L39] EXPR counter++ VAL [A=573, counter=6, counter++=5, R=23, r=3, u=49, v=1] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=6] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=6] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=573, counter=6, R=23, r=3, u=49, v=1] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [A=573, counter=6, R=23, r=2, u=49, v=3] [L39] EXPR counter++ VAL [A=573, counter=7, counter++=6, r=2, R=23, u=49, v=3] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=7] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=7] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=573, counter=7, R=23, r=2, u=49, v=3] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [A=573, counter=7, R=23, r=-1, u=49, v=5] [L39] EXPR counter++ VAL [A=573, counter=8, counter++=7, R=23, r=-1, u=49, v=5] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=8] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=8] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=573, counter=8, r=-1, R=23, u=49, v=5] [L41] COND TRUE !(r > 0) VAL [A=573, counter=8, R=23, r=-1, u=49, v=5] [L47] EXPR counter++ VAL [A=573, counter=9, counter++=8, r=-1, R=23, u=49, v=5] [L47] COND TRUE counter++<20 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=9] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=573, counter=9, r=-1, R=23, u=49, v=5] [L49] COND FALSE !(!(r < 0)) [L51] r = r + u [L52] u = u + 2 VAL [A=573, counter=9, R=23, r=48, u=51, v=5] [L47] EXPR counter++ VAL [A=573, counter=10, counter++=9, r=48, R=23, u=51, v=5] [L47] COND TRUE counter++<20 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=10] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=10] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=573, counter=10, r=48, R=23, u=51, v=5] [L49] COND TRUE !(r < 0) VAL [A=573, counter=10, r=48, R=23, u=51, v=5] [L34] EXPR counter++ VAL [A=573, counter=11, counter++=10, r=48, R=23, u=51, v=5] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=11] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=11] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=573, counter=11, R=23, r=48, u=51, v=5] [L36] COND FALSE !(!(r != 0)) VAL [A=573, counter=11, r=48, R=23, u=51, v=5] [L39] EXPR counter++ VAL [A=573, counter=12, counter++=11, R=23, r=48, u=51, v=5] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=12] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=12] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=573, counter=12, R=23, r=48, u=51, v=5] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [A=573, counter=12, R=23, r=43, u=51, v=7] [L39] EXPR counter++ VAL [A=573, counter=13, counter++=12, r=43, R=23, u=51, v=7] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=13] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=13] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=573, counter=13, R=23, r=43, u=51, v=7] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [A=573, counter=13, R=23, r=36, u=51, v=9] [L39] EXPR counter++ VAL [A=573, counter=14, counter++=13, R=23, r=36, u=51, v=9] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=14] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=14] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=573, counter=14, r=36, R=23, u=51, v=9] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [A=573, counter=14, R=23, r=27, u=51, v=11] [L39] EXPR counter++ VAL [A=573, counter=15, counter++=14, r=27, R=23, u=51, v=11] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=15] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=15] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=573, counter=15, r=27, R=23, u=51, v=11] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [A=573, counter=15, R=23, r=16, u=51, v=13] [L39] EXPR counter++ VAL [A=573, counter=16, counter++=15, R=23, r=16, u=51, v=13] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=16] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=16] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=573, counter=16, r=16, R=23, u=51, v=13] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [A=573, counter=16, r=3, R=23, u=51, v=15] [L39] EXPR counter++ VAL [A=573, counter=17, counter++=16, r=3, R=23, u=51, v=15] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=17] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=17] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=573, counter=17, R=23, r=3, u=51, v=15] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [A=573, counter=17, R=23, r=-12, u=51, v=17] [L39] EXPR counter++ VAL [A=573, counter=18, counter++=17, r=-12, R=23, u=51, v=17] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=18] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=18] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=573, counter=18, R=23, r=-12, u=51, v=17] [L41] COND TRUE !(r > 0) VAL [A=573, counter=18, R=23, r=-12, u=51, v=17] [L47] EXPR counter++ VAL [A=573, counter=19, counter++=18, r=-12, R=23, u=51, v=17] [L47] COND TRUE counter++<20 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=19] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=19] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=573, counter=19, r=-12, R=23, u=51, v=17] [L49] COND FALSE !(!(r < 0)) [L51] r = r + u [L52] u = u + 2 VAL [A=573, counter=19, R=23, r=39, u=53, v=17] [L47] EXPR counter++ VAL [A=573, counter=20, counter++=19, R=23, r=39, u=53, v=17] [L47] COND TRUE counter++<20 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=20] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=20] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=573, counter=20, R=23, r=39, u=53, v=17] [L49] COND TRUE !(r < 0) VAL [A=573, counter=20, r=39, R=23, u=53, v=17] [L34] EXPR counter++ VAL [A=573, counter=21, counter++=20, R=23, r=39, u=53, v=17] [L34] COND FALSE !(counter++<20) [L56] CALL __VERIFIER_assert(((long long) 4*A) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=0, counter=21] [L12] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=21] [L14] reach_error() VAL [\old(cond)=0, cond=0, counter=21] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 176.2s, OverallIterations: 22, TraceHistogramMax: 21, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.1s, AutomataDifference: 134.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 24 mSolverCounterUnknown, 2422 SdHoareTripleChecker+Valid, 96.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2398 mSDsluCounter, 6170 SdHoareTripleChecker+Invalid, 95.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 4774 mSDsCounter, 1072 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5017 IncrementalHoareTripleChecker+Invalid, 6113 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1072 mSolverCounterUnsat, 1396 mSDtfsCounter, 5017 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3272 GetRequests, 2862 SyntacticMatches, 33 SemanticMatches, 377 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2283 ImplicationChecksByTransitivity, 47.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2782occurred in iteration=20, InterpolantAutomatonStates: 353, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.8s AutomataMinimizationTime, 21 MinimizatonAttempts, 1883 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.7s SatisfiabilityAnalysisTime, 31.7s InterpolantComputationTime, 2099 NumberOfCodeBlocks, 1797 NumberOfCodeBlocksAsserted, 50 NumberOfCheckSat, 2979 ConstructedInterpolants, 44 QuantifiedInterpolants, 14406 SizeOfPredicates, 81 NumberOfNonLiveVariables, 3962 ConjunctsInSsa, 289 ConjunctsInUnsatCore, 33 InterpolantComputations, 8 PerfectInterpolantSequences, 9460/11938 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-02-15 20:51:21,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE